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What Is a PhD? Definition, Types of PhDs, and How to Get One

What is a PhD and is it really worth my time? This is a common question among professionals across a variety of fields, both within and outside academia, who contemplate grad school at some point in their journey. If you’ve ever wondered what a doctorate is and whether you should pursue one to advance your career and gain access to better job opportunities, read on.

This comprehensive guide will walk you through key definitions, including what a PhD actually is, the common requirements you need to complete a PhD degree, and the best degree programs available for a wide range of industries. It will also discuss the main benefits of becoming a Doctor of Philosophy, as well as the most common ways to fund your studies.

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What is a doctorate.

A doctorate is a research-based academic degree. It is considered a terminal degree in most disciplines, meaning it represents the highest level of education a student can obtain in their chosen field.

A doctorate is awarded to students who have undergone a lengthy research process and made a significant contribution to the body of knowledge in their field of study. It takes multiple years to complete, during which students work closely with a supervisor and focus on a specific dissertation topic. Completing a doctorate might also involve teaching and comprehensive examinations.

A doctorate serves as solid proof of a person’s level of knowledge and expertise. It demonstrates that you have mastery over your chosen subject, and helps establish you as an expert. This level of expertise comes with top-tier job opportunities and the potential to earn top salaries in your chosen profession.

Doctorate vs PhD: Key Differences

While many people use the terms doctorate and PhD interchangeably, there are key differences between the two. These differences have to do with the application of these degrees. However, both terms refer to terminal degrees, so they hold the same value.

A Doctor of Philosophy degree, or PhD, is a research-oriented degree that demonstrates a person’s ability to contribute new knowledge to their chosen field. A student who pursues a PhD usually does so to answer a specific question, conduct original research to provide an answer, and use their findings to advance their field.

On the other hand, the term doctorate is broader and typically refers to a professional or clinical degree. This means that a person who obtains it has demonstrated an ability to apply advanced knowledge in a particular field in their professional life. Professional doctorates of this kind are awarded, for instance, to medical doctors or doctors of juridical science.

PhD Requirements: How to Get a PhD

While each PhD degree program will have unique requirements depending on the school and field of study, there are some common requirements you need to complete to get a PhD. Keep reading to find out about the most common requirements to earn your advanced degree.

PhD Statement of Purpose

A PhD statement of purpose is a document that clearly outlines your goals for your PhD, your academic credentials, and the reasons why an academic committee should approve your project. It is typically between 500 to 1,000 words long and gives prospective students an opportunity to explain how their research project will make a relevant contribution to their field.

How Many Credits Is a PhD?

Typically, it takes between 90 and 120 credits to complete your PhD studies. However, this number can be as low as 60, depending on the degree type, area of study, and state, regional, or institutional requirements. Credit hours for graduate students are usually divided between course work, research hours, and dissertation work.

Other Common Requirements for a PhD

• Coursework. While coursework is not the main focus of a PhD, students will usually have to enroll in a few core courses during their first or second year of grad school. They might also have the opportunity to enroll in elective courses, which offer a chance to learn about other fields of study.
• Qualifying exams. A common component of many PhD programs is a set of qualifying exams. Students must successfully pass these comprehensive exams toward the end of their degree in order to demonstrate their level of competence in their field. These tend to be oral exams.
• Teaching. Many PhD programs include a teaching component. Students are required to teach basic courses, typically to fresh undergrad students, which helps them develop teaching skills.
• Research. Conducting original research on a particular subject is typically the main component of a doctorate program, and takes up the bulk of doctoral candidates’ time.
• Dissertation. Throughout their program, PhD candidates need to complete a dissertation based on the original research they’ve conducted. Graduate students do this under the guidance of a qualified faculty member.
• Dissertation defense. Once the dissertation is approved, PhD students need to successfully defend their research in front of a panel of experts in their field before they are awarded their degree. This is the final step in the dissertation process.

How Do PhD Programs Work?

Typically, PhD degree programs work based on a mix of coursework and research conducted over three to four years, although this can last longer depending on the program and the pace at which a student completes their research. Coursework is typically completed towards the beginning of the program, and towards the end, the dissertation or thesis becomes the main focus.

In addition, students must fulfill other program requirements throughout this period. This might include teaching undergraduate students, completing a residency, passing qualifying exams, or attending conferences or colloquia. The final step is usually an oral defense in front of a panel of experts, who are selected to evaluate the quality of the research and the value of the results obtained.

Do You Need a Master’s to Get a PhD?

No, a master’s degree is not always required to pursue PhD studies. Many programs in the US allow students to apply to a PhD program straight after completing their bachelor’s degree. Other programs offer dual degrees, meaning that you will obtain a master’s degree while you work toward your doctorate.

What Comes After a Doctorate Degree?

In many fields, the usual step after a doctorate degree is a postdoc. This is an option for those wishing to pursue a career in academia and continue doing research in their field. However, an academic career is not the only option. Because a doctorate is a terminal degree, graduates can easily move on to professional positions in other types of organizations in their chosen field.

Best Online Master’s Degree Programs

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PhD Dissertation vs Thesis

The main difference between a dissertation and a thesis is the scope of the research being conducted and the type of degree you are awarded after completing it. Often, the terms are used interchangeably, or they can hold different meanings in European countries, which causes some confusion regarding their nature. Keep reading to understand the differences between a PhD dissertation and a thesis in the US.

What Is a PhD Dissertation?

A PhD dissertation is a piece of scholarly work that presents the original research carried out by a doctoral student during the length of their program. It discusses the scope, methodology, results, and conclusions of the research at length. The end goal of a doctoral dissertation is to produce results that help advance human knowledge in a given field.

PhD Dissertation Defense

A PhD dissertation defense is the process in which a PhD candidate defends their research in front of a panel of experts in their field. During the defense, members of the panel ask questions regarding the information presented, providing the candidate an opportunity to back up their work and demonstrate the level of expertise they’ve achieved after years of dedicated work.

What Is a PhD Thesis?

In the US, as opposed to some European countries, the term thesis refers to a shorter academic paper that is usually presented for the completion of a master’s degree. It can also sometimes be a requirement for honors students completing a bachelor’s degree. The information presented in a thesis is usually drawn from existing sources, rather than from original research conducted by the student.

PhD Thesis Defense

A thesis defense is usually not a mandatory requirement for master’s students, although this varies according to your school and department. The thesis is still an in-depth piece of scholarly writing and serves as a testament to a student’s mastery of a given subject, and a defense serves as an opportunity to engage a panel of experts and defend the contents of your paper.

How Long Does It Take to Earn a Doctorate?

Most doctoral programs are designed to be completed in four to six years. However, it can take up to seven and a half years to earn a doctoral degree from the start of graduate school, according to data presented by the National Science Foundation.

A number of factors can affect how long it takes students to earn their PhDs. They include the structure of their chosen program, the type of research being conducted, and the support provided by the institution. On average, students completing doctoral programs in science and engineering fields finish faster than their counterparts in non-science and engineering fields.

How Hard Is It to Get a PhD?

It can be very hard to get a PhD. Working for several years on a particular dissertation topic can be very trying. Aside from the time commitment, the depth of research that is part of the dissertation process can also be challenging. Admissions to a top education institution can be extremely competitive, as usually there are only a handful of positions available for hundreds of applicants.

What Is the Easiest PhD to Get?

PhDs in the humanities, social sciences, and education are typically regarded as the easiest to obtain. However, this truly comes down to how interested you are in your chosen dissertation topic and your level of commitment to making a relevant contribution to human knowledge, both of which can greatly influence your perception of the difficulty of the degree.

How Much Does a PhD Cost?

According to data from the National Center for Education Statistics, the average yearly cost of graduate programs in the US is $19,792. Data from the QS World University Rankings suggest that the yearly cost of a PhD in the US ranges from $28,000 to $40,000. The total cost of a PhD can greatly vary depending on the university, length of the program, and funding options available for doctoral study.

Best PhD Programs

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Benefits of a Doctoral Degree: Why Do a PhD?

There are many concrete benefits to completing a doctorate, such as career advancement opportunities, expertise in your field, and the chance to earn better salaries. Keep reading to find out about some concrete reasons why you should do a PhD to advance your career.

Career Advancement Opportunities

Holding a doctorate can provide you with great opportunities to advance your career. Many top-tier jobs in various industries require applicants to be experts in their field. For instance, a PhD in Business Administration can make you a strong candidate for senior, managerial, or executive positions in world-class companies in the public or private sector, or help you launch an independent career as a consultant.

Even for jobs where this type of formal training is not required, you may still find yourself in fierce competition with other applicants. A PhD can help you stand out as a candidate, as it demonstrates your ability to conduct research, work independently, and succeed in pursuing your long-term goals.

Increased Earning Potential

One of the top benefits of completing your doctoral degree is the potential for earning better salaries. For example, the average yearly income for a professional with a Master’s Degree in Physics is $99,000, while someone with a PhD in Physics can expect to earn up to $119,000 yearly.

Expertise in Your Field

Earning a doctorate helps solidify your status as an expert in your field. If there is a topic that you are deeply passionate about, your PhD is your chance to fully immerse yourself in it. Through this process, you will be making important contributions and developing groundbreaking practices in your area.

Transferable Skills

Aside from your ability to work independently and conduct research in your area of expertise, you will also develop a variety of transferable skills that will be useful to you no matter what you choose to do after graduation.

Throughout your program, you will be participating in committees, teaching, organizing conferences, publishing your work, and meeting other experts. As a result, you will develop multipurpose skills, including time and project management, communication and interpersonal skills, and leadership skills.

While you pursue your academic degree, you will be participating in academic conferences, workshops, seminars, and colloquia. This, in turn, means you will have ample opportunities to connect with other doctoral students in your field and in other areas of knowledge. The connections you make through your PhD can lead to career opportunities and expand your social circle in new and interesting ways.

How to Earn a Doctoral Degree

So, how do you earn a doctoral degree? While there is work to be put in, the process is actually quite straightforward. Keep reading to find out how you can embark on the path toward your PhD.

The first step to earning your doctorate is to complete a bachelor’s degree at the undergraduate institution of your choice. Depending on your chosen field, you might need to obtain a degree in a specific discipline, which can then pave the way for your graduate studies.

If a bachelor’s degree is not an option right away, you can start by obtaining an associate degree , which can even be done through the best online community colleges . While you obtain your undergraduate degree, make sure to seek out career advice from experts who can help you decide how to best use your time and embark on the right academic path.

While earning a master’s degree is not mandatory to apply to a PhD program, doing so can offer you a competitive advantage. It will give you a chance to deepen your knowledge on a particular topic, connect with professors and gather recommendations, and test the waters regarding your chosen field.

In order to successfully apply to a master’s degree program, you will have to provide your GPA, letters of recommendation, and sometimes standardized test scores. For instance, if you’re interested in pursuing a Master’s Degree in Mathematics , you will need to prep for the GMAT and submit your scores. Be sure to check the requirements of your chosen school and department.

Whether you have completed your master’s or are applying straight after your bachelor's, make sure to spend some time choosing your specific research area and the type of PhD you wish to pursue. This is also an excellent time to assess funding opportunities and contact potential supervisors to gauge their interest in and ability to support you during your studies.

In order to enroll in a doctoral program, you will need to provide quite a few documents with your application. Every school is different, but the most common requirements are transcripts, letters of recommendation, and a strong statement of purpose. Make sure you check the specific requirements of your chosen program, and prepare to be interviewed by faculty members.

After being accepted into a doctoral program, you should outline what the next few years will look like. What requirements do you need to complete to earn your PhD? Spend time crafting a realistic timeline that can help you stay on track and complete every step successfully. This includes teaching, participating in conferences, and successfully completing your qualifying exams.

The final step to obtaining your PhD is to successfully complete your research and compile your results in your dissertation. Once it is reviewed and approved by your supervisor and readers, you will have to defend it as well. It can be a trying process, but the results will be worth it.

How to Choose a PhD Program

In order to choose a PhD program that is right for you, there are several factors you should consider. A PhD is a strong commitment both in terms of time and money, so the decision shouldn’t be made lightly. Keep reading to find out how to choose a PhD program.

PhD Acceptance Rates

The PhD acceptance rates of a university give you an idea of how likely you are to be admitted to your chosen program. This number is a reflection of how competitive a program is and the funding the department receives. Use this information to orient yourself to the selection process, as applying to a variety of programs with different acceptance rates can increase your chances of being accepted into one of them.

Keep in mind that acceptance rates are usually measured by department, not university. For instance, Columbia University has an acceptance rate of four to six percent for its psychology PhD program , and an acceptance rate of five to seven percent for its history PhD .

PhD Dropout Rates

PhD dropout rates are important to consider, as they give you an idea of how supported students are in a particular program and how likely you are to complete your doctorate. In the US, PhD attrition rates, or dropout rates, can range from 40 to 50 percent , so take your time to find a university and program with a high success rate to ensure you will be able to finish and obtain your degree.

Faculty Members

One of the key relationships you will have during your time as a PhD student will be with your supervisor. You will also be working closely with other members of your department. As such, make sure to research the faculty to ensure that their interests and research projects align with your own. During the research stage, you can even reach out to them to find out about the department, ask about funding opportunities, and receive relevant career advice.

Funding Opportunities

A PhD can be costly, but there are many ways to offset those costs to make it more manageable. Be it scholarships, grants, or work opportunities, make sure to research all funding opportunities available so you can select a program that aligns with your financial situation. Many universities offer fully-funded programs to outstanding students, so do your homework and find a program that doesn’t leave you financially crippled in the long run.

When you commit to a PhD, you are also committing to several years of work. Unless you are planning to complete your program fully online, you should take into account the place where you will be moving to continue your studies.

Do you prefer big cities or small college towns? Which part of the country would you be willing to relocate to? Take some time to reflect on your preferences so you can choose the best location according to your needs and preferences.

Best Online PhD Programs

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What Can You Get a Doctorate In?

You can get a doctorate in a wide variety of topics. Below is a list of common fields in which you can pursue this type of degree:

• PhD in Psychology
• PhD in Education
• PhD in Nursing
• PhD in Social Work
• PhD in Economics
• PhD in Business
• PhD in Computer Science
• PhD in Data Science
• PhD in Business Administration
• PhD in Accounting
• PhD in Mathematics
• PhD in Statistics
• PhD in Engineering
• PhD in Cyber Security
• PhD in Information Systems

Best PhD Programs and Their Potential Jobs

The best PhD programs offer you the training you need to succeed in your field and access top jobs in your industry. Keep reading to find out about common programs in a variety of fields, both in-person and online, as well as the jobs you’ll have access to once you finish.

A PhD in Psychology provides you with the formal training required to conduct scientific research in the field, practice professionally with patients, or both. With a PhD in Psychology, you will be able to advance human knowledge on behavioral disorders, strategies for diagnosis, and treatment plans that are on par with the latest scientific discoveries.

Psychology PhD Programs

• PhD in Psychology at Stanford University
• PhD in Psychology at University of California, Berkeley
• PhD in Experimental Psychopathology & Clinical Science at Harvard University

Online PhDs in Psychology

• Online PhD in Psychology at Liberty University
• PhD in Counseling & Psychological Studies at Regent University  
• PhD in Counseling Psychology at Loyola University Chicago

PhD Psychology Jobs 

• Organizational Development Director | Average Salary: $118,140
• Research Director | Average Salary: $107,634
• UX Researcher | Average Salary: $88,914

PhD Psychology Salary 

According to statistics presented by PayScale, the average base salary of a professional with a PhD in Psychology is $95,000 per year. This can vary depending on your location, company, position, and level of experience.

A PhD in Education prepares students to conduct education research and is typically chosen by those interested in pursuing a career path in academia. Holders of this type of PhD are qualified to work as curriculum specialists, policymakers, teacher educators, instructional leaders, and, of course, education researchers.

Education PhD Programs

• PhD in Teaching and Learning at New York University, Steinhardt
• PhD in Education Policy at the University of Pennsylvania
• Doctor of Philosophy in Education at Harvard University

Online PhDs in Education

• PhD in Education – Educational Technology and Online Learning at Regent University
• PhD in Education at Concordia University
• Doctor of Education at the University of Illinois at Urbana Champaign

PhD Education Jobs 

• Elementary, Middle, and High School Principals | Average Salary: $98,420
• Postsecondary Education Administrators | Average Salary: $96,910
• Postsecondary Teachers | Average Salary: $79,640

PhD Education Salary 

The average annual salary for a professional with a PhD in Education is $82,000, according to PayScale. Those with jobs as professors in postsecondary or higher education can expect a range between $56,000 and $188,000, while professionals in executive positions can make up to $171,000 per year.

A PhD in Nursing is a perfect option for nurses seeking to work in academia or conduct research. It is the highest degree that can be obtained by professionals in this area who have opted to advance their field from the lab instead of doing so in a clinical setting.

Nursing PhD Programs

• Doctorate of Nursing at Johns Hopkins University
• PhD in Nursing at the Univerity of Washington
• Doctor of Philosophy in Nursing at the University of North Carolina, Chapel Hill

Online PhDs in Nursing

• Online PhD in Nursing at the University of Central Florida
• PhD in Nursing Science at Vanderbilt University
• PhD in Nursing at Walden University

PhD Nursing Jobs 

• Dean of Nursing | Average Salary: $113,399
• Nursing Director | Average Salary: $93,943
• Nursing Instructor | Average Salary: $64,253

PhD Nursing Salary 

PayScale estimates that the average annual salary for a professional with a PhD in Nursing is $93,000. A nursing instructor can expect an estimated salary ranging from $53,000 to $93,000, while a nursing director can expect a salary ranging from $85,000 to $156,000.

Students who pursue a PhD in social work gain the skills and knowledge to act as leaders in social work research and social work education. Graduates from these programs are prepared to become involved in the creation and analysis of social policy, planning, and administration. They can work with governments, nonprofit organizations, or in the private sector.

Social Work PhD Programs

• Joint PhD Program in Social Work and Social Science at the University of Michigan
• PhD in Social Work at The University of Chicago
• PhD Program in Social Welfare at the University of Washington 

Online PhDs in Social Work

• Doctorate of Clinical Social Work at the University of Southern California
• Doctorate of Social Work at Rutgers University
• Online Doctor of Behavioral Health – Management at Arizona State University

PhD Social Work Jobs 

• Director of Clinical Services | Average Salary: $90,983
• Executive Director | Average Salary: $81,329
• Nonprofit Program Director | Average Salary: $59,621

PhD Social Work Salary 

The average annual salary for a professional with a PhD in Social Work is $76,000, according to data presented by PayScale. A program director for a nonprofit organization can make between $49,000 and $84,000.

The best doctorates in economics prepare graduates to make decisions that increase the profitability of businesses, maximize the use of resources, and inform public policy. Over years of analyzing economic trends, deepening their knowledge of local and global economics, and conducting research, graduates will be ready to work in the public or private sector.

Economics PhD Programs

• PhD in Economics at Arizona State University
• PhD in Economics at John Hopkins University
• PhD in Economics at Syracuse University

Online PhDs in Economics

• PhD in Public Policy – Economic Policy at Liberty University
• PhD in Business Administration at the University of Maryland – Global Campus
• Doctor of Philosophy in Business Administration at Hampton University

PhD Economics Jobs 

• Financial Manager | Average Salary: $131,710
• Economist | Average Salary: $105,630
• Professor of Economics | Average Salary: $97,190

PhD Economics Salary 

According to PayScale, the average annual income for someone with a PhD in Economics is $112,000. Whether you obtain your PhD in person or through an accredited online PhD program , you’ll be able to make an impact and earn well while doing so.

A PhD in Business prepares you to become a successful professional in either the public or private sector. With this type of degree, you can go on to work in corporate finance, international business, or industrial organization. You’ll gain in-depth knowledge about markets, competition, and government regulation.

Business PhD Programs

• PhD in Business Economics at Harvard University
• PhD in Business at Stanford Graduate School of Business
• PhD in Finance at New York University

Online PhDs in Business

• Doctorate in Business Management at Atlantic International University
• Executive Doctorate in Business at Drexel University
• Doctorate of Business Education at Creighton University

PhD Business Jobs 

• Senior Director of Strategy | Average Salary: $156,566
• Chief Operating Officer (COO) | Average Salary: $144,743
• Vice President of Operations | Average Salary: $133,086

PhD Business Salary 

According to data presented by PayScale, the average annual salary of someone holding a PhD in Business is $150,000. This type of degree opens the door to top positions in various industries, almost all of which come with lucrative salaries.

The best PhDs in Computer Science are flexible degrees that open doors in a variety of fields. Whether you choose to get this degree in person or opt for one of the best online PhDs in computer science , you will gain valuable experience and deepen your knowledge of computational science theory, cyber operations, and information assurance.

Computer Science PhD Programs

• PhD in Computer Science at Carnegie Mellon University
• PhD in Computer Science at Boston University
• PhD in Computer Science at Arizona State University

Online PhDs in Computer Science

• PhD in Electrical Engineering and Computer Sciences at University of California, Berkeley
• PhD in Computer Science at Indiana University
• PhD in Computer Science at Mississippi State University

PhD Computer Science Jobs 

• Chief Data Scientist | Average Salary: $190.365
• Chief Information Officer | Average Salary: $169,334
• Senior Computer Scientist | Average Salary: $153,972

PhD Computer Science Salary 

According to PayScale, the average salary for a professional holding a computer science PhD is $131,000 per year. As with any other industry, your salary will be determined by your level of experience, your position, and your location.

A PhD in Data Science is a research-intensive degree that helps you cultivate skills and knowledge in programming, statistics, data analysis, machine learning, and artificial intelligence. With it, you can launch a successful career   

Data Science PhD Programs

• PhD in Data Science, Analytics, and Engineering at Arizona State University
• PhD in Computational Sciences and Informatics at George Mason University
• PhD in Statistics and Data Science at Yale University

Online PhDs in Data Science

• PhD in Data Science at Northcentral University
• PhD in Information Science at the University of North Texas
• Online PhD in Data Science and Technology Management at Northcentral University

PhD Data Science Jobs 

• Computer and Information Research Scientist | Average Salary: $131,490
• Mathematician or Statistician | Average Salary: $96,280
• Medical Scientist | Average Salary: $95,310

PhD Data Science Salary 

PayScale does not offer salary information specifically about data science PhD holders. However, statistics do exist for computer science PhD holders, which is a close match. They show that the average salary for a professional with a PhD in Computer Science is $131,000.

A PhD in Business Administration prepares students for successful careers leading business ventures across all industries. It is a highly interdisciplinary degree that includes aspects of marketing, economics, information systems, finance, and human resource management. Accredited online PhDs in Business Administration offer busy students the opportunity to complete their degree in a fully remote modality.

Business Administration PhD Programs

• PhD in Business Administration at Duke University
• PhD in Business Administration at Harvard University
• Doctor of Philosophy in Business Administration at George Washington University

Online PhDs in Business Administration

• Business Administration PhD at Temple University
• Doctor of Business Administration at Liberty University
• Doctor of Business Administration at the University of Maryland Global Campus

PhD Business Administration Jobs 

• Information Systems Manager | Average Salary: $159,010
• Human Resources Manager | Average Salary: $126,230

PhD Business Administration Salary 

The average salary of a professional with a PhD in Business Administration is $105,000, according to PayScale. Salaries for information systems managers with PhDs in this field can be close to $160,000 per year. On the lower end of the spectrum, university professors in the field can take home around $80,000 per year.

A Doctorate in Accounting is typically pursued by students interested in focusing their careers on research rather than the practice of their profession. This can be accomplished both in academic institutions and research organizations. Teaching is another common avenue for those who pursue this type of degree.

Accounting PhD Programs

• PhD in Accounting at the University of Colorado, Boulder
• PhD in Accoutning at Stanford University
• PhD in Accounting at the University of Pennsylvania

Online PhDs in Accounting

• PhD in Accounting at Capella University
• DBA in Accounting at Drexel University
• DBA in Accounting at Liberty University

PhD Accounting Jobs 

• Chief Financial Officer (CFO) | Average Salary: $140,445
• Corporate Controller | Average Salary: $104,674
• Financial Controller | Average Salary: $87,309

PhD Accounting Salary 

Once you obtain your accounting PhD, you’ll be able to earn a salary of $109,000 per year on average, according to data from PayScale. With jobs on the low end of the spectrum, you might earn $59,000 per year on average, while on the higher end of the spectrum you’ll be looking at an average annual salary of around $230,000.

A PhD in Mathematics can be extremely challenging to obtain, and these programs are usually highly competitive and admit only a handful of applicants each year. With this degree, you’ll be using your analytical and critical thinking skills in fields such as education and academic research, technology development and services, or the pharmaceutical industry.

Mathematics PhD Programs

• PhD in Mathematics at Columbia University
• PhD in Mathematics at Harvard University
• Doctor of Philosophy or Doctor of Science Mathematics Degree at the Massachusetts Institute of Technology

Online PhDs in Mathematics

• Doctorate in Mathematics at Atlantic International University
• PhD in Mathematics Education at the University of Wyoming
• PhD in Mathematics at Edith Cowan University

PhD Mathematics Jobs 

• Data Scientist | Average Salary: $108,660
• Actuary | Average Salary: $105,900

PhD Mathematics Salary 

The average salary for a mathematics PhD holder , according to PayScale, is $110,000. If you opt for a career as a data scientist, you can expect a salary ranging between $75,000 and $141,000. As a mathematician, that range can be between $66,000 and $135,000. 

A PhD in Statistics is useful in various fields, such as the medical industry, education, and economics. During this program, you will learn how to better understand data, calculate risk, and successfully measure uncertainty, all of which have applications across fields and in both the public and private sectors.  

Statistics PhD Programs

• PhD in Statistics at Boston University
• PhD in Statistics at Columbia University
• PhD in Statistics at University of California, Berkeley

PhD Statistics Jobs 

• Statistician | Average Salary: $96,280
• Biostatistician | Average Salary: $77,924

PhD Statistics Salary 

The average annual salary of a PhD in Statistics graduate is $116,000, according to PayScale. As a statistician, your average salary can range from $71,000 to $133,000, and as a biostatistician, you can earn a salary ranging from $66,000 to $139,000.

Depending on the university and program you choose, a Doctorate in Engineering might be a PhD, an EngScD, a Doctor of Science in Engineering, or a DEng, Doctor of Engineering. This type of degree is heavily focused on technical research and can branch out into a variety of fields, such as biomedical, electrical, or mechanical engineering. Whatever the specialization, this doctorate will teach you to understand and solve problems using your technical knowledge.

Engineering PhD Programs

• PhD in Biomedical, Computer, or Electrical Engineering at Boston University
• Doctor of Science in Engineering at Columbia University
• PhD in Engineering at the Massachusetts Institute of Technology

Online PhDs in Engineering

• PhD in Aerospace Engineering and Mechanics at the University of Alabama
• PhD in Biomedical Engineering at the University of Maine
• Doctor of Philosophy in Reliability Engineering at University of Maryland

PhD Engineering Jobs 

• Chief Engineer | Average Salary: $86,920
• Manufacturing Process Engineer | Average Salary: $77,452
• Applications Engineer | Average Salary: $74,529

PhD Engineering Salary 

With a PhD in engineering, you can earn an average salary of $147,000 , according to PayScale. As an applications engineer, you can earn a salary ranging from $67,000 to $100,000, while as a chief engineer your salary might range from $105,000 to $273,000.

Cyber security is a growing field, and the Bureau of Labor Statistics (BLS) projects that there will be a 33 percent growth rate for information security analysts over the next 10 years. A PhD in Cyber Security prepares you for senior-level cyber security jobs across various industries, as well as for research positions. 

Cyber Security PhD Programs

• PhD in Computer Science with a Specialization in Cyber Security at the University of Rhode Island
• PhD in Security at the University of Colorado
• PhD in Computer Science (Cybersecurity) at Arizona State University

Online PhDs in Cyber Security

• PhD in Cybersecurity at Capitol Technology University
• PhD of Science in Cybersecurity at Marymount University
• Online PhD in Technology and Innovation Management – Cybersecurity at Northcentral University

PhD Cyber Security Jobs 

• Chief Information Security Officer | Average Salary: $170,271
• Cyber Security Architect | Average Salary: $129,369
• Lead Security Engineer | Average Salary: $120,827

PhD Cyber Security Salary 

According to data presented by PayScale, you can earn an average annual salary of $172,000 with a PhD in Cyber Security . This type of degree grants you access to senior roles, including director of operations, education program director, chief information security officer, penetration tester, and cyber security architect.

A PhD in Information Systems provides students with the education needed to understand and solve complex information technology problems, as well as conduct relevant research to propose new solutions and innovate in their chosen field.

Information Systems PhD Programs

• PhD in Business Administration With a Concentration in Computer Information Systems at Arizona State University
• PhD in Information Systems at Dakota State University
• PhD in Information Systems and Operations Management at Emory University

Online PhDs in Information Systems

• PhD in Information Systems at Northcentral University
• PhD in Information Technology at the University of the Cumberlands
• PhD in Management With a Specialization in Information Systems Management at Walden University

PhD Information Systems Jobs 

• Computer and Information Systems Manager | Average Salary: $159,010
• Database Administrator or Architect | Average Salary: $98,860

PhD Information Systems Salary 

The average salary for a professional with a PhD in Information Systems is $141,000. As with any other industry, this figure varies according to your position, level of experience, location, and the company you work for.

Can You Get a PhD Online?

Yes, you can get a PhD online. Many reputable universities in the country offer accredited online degree programs in a variety of disciplines. This education format is ideal for students who are unable to relocate or who prefer more flexible learning modalities.

Most Affordable Online PhD Programs

• PhD ​in ​Education ​and ​Educational ​Leadership at Drexel University. Tuition: $140/credit
• PhD in Mathematics Education at University of Wyoming. Tuition: $399/credit (in state)
• PhD in Information Systems at Dakota State University. Tuition: $464.90/credit
• PhD in Information Technology at University of the Cumberlands. Tuition: $500/credit
• PhD in Media and Communication at Indiana University of Pennsylvania. Tuition: $516/credit (in state)

Free Online PhD Programs

Unfortunately, there are no free online PhD programs. However, a multitude of funding opportunities do exist to help you cover the cost of your program. These include scholarships and grants, loans, and various forms of financial aid. Fully funded PhD programs also exist in a variety of universities and fields to support outstanding students looking to obtain their degrees.

How to Pay for a PhD

PhD programs are usually quite expensive. Fortunately, there are a variety of ways you can finance your studies. Keep reading to find out about the main ways to fund your PhD.

PhD Scholarships and Grants

Scholarships and grants consist of funds provided to students so they can cover the cost of their doctoral degrees. They can either be need-based or be awarded based on character or merit. Recipients of this type of funds usually do not need to pay the money back. They can be awarded by universities or other institutions, such as charities or research foundations.

PhD Financial Aid

Universities typically offer a wide range of financial aid options to prospective and current students to help them cover the cost of their programs. This might include, but is not limited to, tuition grants, stipends, computer or equipment subsidies, and access to funds for research or travel. Make sure to consult with your department to find out what forms of financial aid might be available to you.

Fully Funded PhD Programs

Many PhD programs are fully funded, meaning they waive tuition and associated fees entirely for outstanding students. Sometimes, the full funding can also include book stipends or funds for travel and research. While these tend to be highly competitive programs, they also offer the best option to complete your doctorate while avoiding the financial burden involved.

What Can You Do With a PhD?

With a PhD, you can gain access to senior, executive, or managerial positions in your industry. You can also have a successful career as a researcher in either the public or private sectors as you continue to expand the body of knowledge in your field. You can also choose to stay in academia and work as a college professor.

How Much Do PhD Professors Make?

On average, PhD professors earn an average salary of $143,823 per year, according to data presented by the American Association of University Professors pertaining to the 2021-22 academic year. This number can vary greatly depending on your field and whether you work for a public, private, for-profit, or not-for-profit institution.

What Jobs Can You Get With a Doctorate Degree?

• Senior Data Scientist | Average Salary: $128,060 . Senior data scientists use data to create strategies and orient the growth of organizations. They also serve as team leaders.
• Senior Software Engineer | Average Salary: $121,578 . Senior software engineers are experts in their field and are tasked with developing innovative information systems to help organizations reach their goals.
• Senior Research Scientist | Average Salary: $106,142 . Senior research scientists work in laboratory settings across various industries. They conduct research and experiments, which can have industrial, commercial, or academic purposes.
• Top Executive | Average Salary: $98,980 . The main task of a top executive, regardless of the industry they work for, is to devise strategies and policies to ensure their organization meets its goals.
• Postsecondary Teachers | Average Salary: $79,640 . Postsecondary teachers instruct students beyond the high school level. The subjects they teach depend on their academic track and areas of expertise.

Conclusion: Is a Doctoral Degree Worth It?

Yes, a doctoral degree is worth it if you want to position yourself as an expert in your field, gain access to senior, executive, or managerial positions, and enjoy higher salaries. It is also a great option if you wish to contribute new knowledge to your field by conducting groundbreaking research on a particular topic.

Completing a doctoral degree requires endurance, commitment, and an ability to overcome obstacles. It involves a strong time commitment of several years, as well as a considerable financial commitment, but it usually pays off. Whether you plan to work in academia, a private research firm, or any other public or private organization, a PhD will arm you with the skills and knowledge you need to help your career flourish.

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A Doctor of Philosophy or Doctorate

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More than 54,000 students earned doctoral degrees in 2016, the latest year for which figures are available, a 30 percent increase since 2000, according to the  National Science Foundation . A Ph.D., also called a doctorate, is a "Doctor of Philosophy" degree, which is a misleading moniker because most Ph.D. holders are not philosophers. The term for this increasingly popular degree derives from the original meaning of the word "philosophy," which comes from the ancient Greek word  philosophia , meaning "love of wisdom."

What Is a Ph.D.?

In that sense, the term "Ph.D." is accurate, because the degree has historically been a license to teach, but it also signifies that the holder is an "authority, in full command of (a given) subject right up to the boundaries of current knowledge, and able to extend them," says  FindAPhD , an online Ph.D. database. Earning a Ph.D. requires a hefty financial and time commitment— $35,000 to $60,000  and two to eight years—as well as research, creating a thesis or dissertation, and possibly some teaching duties.

Deciding to pursue a Ph.D. can represent a major life choice. Doctoral candidates require additional schooling after completing a master's program to earn their Ph.D.: They must complete additional coursework, pass comprehensive exams , and complete an independent dissertation in their field. Once completed, though, a doctoral degree—often called a "terminal degree"—can open doors for the Ph.D.holder, especially in academia but also in business.

Core Courses and Electives

To obtain a Ph.D., you need to take a group of core courses as well as electives, totaling about 60 to 62 "hours," which are roughly the equivalent of units at the bachelor's degree level. For example, Washington State University offers a  Ph.D. in crop science . Core courses, which make up about 18 hours, include such subjects as introduction to population genetics, plant transmission genetics, and plant breeding.

Additionally, the student must make up the remaining required hours through electives. The  Harvard T.H. Chan School of Public Health  offers a doctoral degree in Biological Sciences in Public Health. After core courses such as laboratory rotations, biological sciences seminars, and core principles of biostatistics and epidemiology, the Ph.D. candidate is required to take electives in related fields such as advanced respiratory physiology, advanced respiratory physiology, and ecological and epidemiological control of parasitic diseases. Degree-granting institutions across the board want to ensure that those who earn Ph.D.s have broad knowledge in their chosen field.

Thesis or Dissertation and Research

A Ph.D. also requires students to complete a large scholarly project known as a  dissertation , a research report—usually 60-plus pages—which signifies that they are able to make significant independent contributions to their chosen field of study. Students take on the project, also known as a  doctoral thesis , after completing the core and elective coursework and passing a  comprehensive examination . Through the dissertation, the student is expected to make a new and creative contribution to a field of study and to demonstrate her expertise.

According to the Association of American Medical Colleges, for example, a strong medical dissertation relies heavily on the creation of a specific hypothesis that can be either disproved or supported by data collected through independent student research. Further, it must also contain several key elements starting with an introduction to the problem statement, conceptual framework, and research question as well as references to literature already published on the topic. Students must show that the  dissertation  is relevant, provides new insight into the chosen field, and is a topic that they can research independently.

Financial Aid and Teaching

There are several ways to pay for a doctoral degree: scholarships, grants, fellowships, and government loans, as well as teaching.  GoGrad , a graduate school information website, provides such examples as the:

• Science, Mathematics, and Research for Transformation (SMART) Scholarship for Service Program, which provides full tuition and an annual stipend of $25,000 to $38,000.
• National Defense Science and Engineering Graduate Fellowship, a three-year graduate fellowship that is designed to support doctoral students across 15 engineering disciplines
• National Science Foundation Graduate Research Fellowship Program, a three-year program that provides an annual stipend of $34,000 and a $12,000 cost-of-education allowance for tuition and fees

As it does for bachelor's and master's degrees, the federal government also offers several  loan programs  to help students finance their Ph.D. studies. You generally apply for these loans by filling out the free application for federal student aid ( FAFSA ). Students planning to go into teaching after obtaining their doctoral degrees often also supplement their income by teaching undergraduate classes at the schools where they are studying. The University of California, Riverside, for example, offers a "teaching award"—essentially a stipend applied toward tuition costs—for Ph.D. candidates in English who teach undergraduate, beginning-level, English courses

Jobs and Opportunities for Ph.D. Holders

Education accounts for a large percentage doctoral awards, with elementary education, curriculum and instruction, educational leadership and administration, special education, and counselor education/ school counseling topping the list. Most universities in the United States require a Ph.D. for candidates who seek teaching positions, regardless of the department.

Many Ph.D. candidates seek the degree, however, to boost their current salaries. For example, a health, sports, and fitness educator at a community college would realize a bump in annual pay for obtaining a Ph.D. The same holds for educational administrators. Most such positions require only a master's degree, but obtaining a Ph.D. generally leads to an annual stipend that school districts add to the annual salary. That same health and fitness instructor at a community college could also move on from a teaching position and become a dean at a community college—a position that requires a Ph.D.—boosting his pay to  $120,000 to $160,000  a year or more.

So, the opportunities for a doctoral degree holder are wide and varied, but the cost and commitment required are significant. Most experts say you should know your future career plans before you make the commitment. If you know what you want to get out of the degree, then the years of required study and sleepless nights may well be worth the investment.

• How to Decide Between a Ph.D. or Psy.D. in Psychology
• What Comes After a Master's Degree?
• Understanding the Definition of a Doctoral Candidate
• The Difference Between Fellowships and Scholarships
• Should I Earn a Doctorate Degree?
• How to Earn a Doctorate Degree Online
• Abbreviations and Titles All College Students Should Know
• A Step-By-Step Guide to Writing a Ph.D. Dissertation
• Types of Nursing Programs and Degrees
• What Is a Master of Social Work?
• The Meaning and Significance of a PsyD
• Top 8 Best Grad School Scholarships and Fellowships
• Considering a Graduate Degree in History?
• Top 25 U.S. Colleges for a Geology Ph.D.
• Should I Seek the MSW, PhD or DSW for a Career in Social Work?
• Should I Earn a PhD in Business Administration?

What Is a Doctorate Degree?

A doctorate is usually the most advanced degree someone can get in an academic discipline, higher education experts say.

What Is a Doctorate?

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It's unwise to apply to a doctoral program if you don't have a clear idea of how you might use a doctorate in your career.

In many academic disciplines, the most advanced degree one can earn is a doctorate. Doctorate degree-holders are typically regarded as authorities in their fields, and many note that a major reason for pursuing a doctorate is to increase professional credibility.

"If someone wants to be respected as an expert in their chosen field, and also wants to have a wider array of options in research, writing, publishing, teaching, administration, management, and/or private practice, a doctorate is most definitely worth considering," Don Martin, who has a Ph.D. in higher education administration , wrote in an email.

A doctoral degree is a graduate-level credential typically granted after multiple years of graduate school, with the time-to-degree varying depending on the type of doctoral program, experts say.

Earning a doctorate usually requires at least four years of effort and may entail eight years, depending on the complexity of a program's graduation requirements. It also typically requires a dissertation, a lengthy academic paper based on original research that must be vetted and approved by a panel of professors and later successfully defended before them for the doctorate to be granted.

Some jobs require a doctorate, such as certain college professor positions, says Eric Endlich, founder of Top College Consultants, an admissions consulting firm that helps neurodivergent students navigate undergraduate and graduate school admissions.

Endlich earned a Doctor of Philosophy degree, commonly known as a Ph.D., from Boston University in Massachusetts. He focused on psychology and notes that a doctoral degree is generally required to be a licensed psychologist.

"Since a Ph.D. is a research-focused degree, it can be advantageous to those seeking high-level research positions in scientific fields such as astrophysics or biotechnology," he says.

How Long it Takes to Get a Doctorate Degree

Martin, founder and CEO of Grad School Road Map, an organization that helps grad school applicants navigate the admissions process, says obtaining a doctorate is often a lengthy endeavor.

"Typically it can take between four and six years to complete any doctoral program," he says. "If comprehensive examinations and a dissertation are part of the graduation requirements, it may take a year or two longer. There is no standard amount of time – some students take seven to 10 years to finish."

Endlich says doctoral degree hopefuls should be aware that completing a dissertation may take a long time, especially if unexpected hurdles arise.

"My dissertation, for example, involved recruiting college students to complete questionnaires, and it took much longer than I anticipated to recruit enough subjects for my study," he says.

The standards for a dissertation, which include the proposal and research, are rigorous and usually involve a review and approval by a faculty committee, says Hala Madanat, vice president for research and innovation at San Diego State University in California.

"As part of dissertation requirements, some programs will require publication of the research in high-impact peer-reviewed journals," Madanat wrote in an email.

Types of Doctoral Degree Programs

According to professors and administrators of doctoral programs, there are two types of doctorates.

Doctor of Philosophy

A doctor of philosophy degree is designed to prepare people for research careers at a university or in industry, and teach students how to discover new knowledge within their academic discipline. Ph.D. degrees are offered in a wide range of academic subjects, including highly technical fields like biology , physics, math and engineering; social sciences like sociology and economics; and humanities disciplines like philosophy.

A Ph.D. is the most common degree type among tenure-track college and university faculty, who are typically expected to have a doctorate. But academia is not the only path for someone who pursues a Ph.D. It's common for individuals with biology doctorates to work as researchers in the pharmaceutical industry, and many government expert positions also require a Ph.D.

Professional or clinical doctorates

These are designed to give people the practical skills necessary to be influential leaders within a specific industry or employment setting, such as business, psychology , education or nursing . Examples of professional doctoral degrees include a Doctor of Business Administration degree, typically known as a DBA; a Doctor of Education degree, or Ed.D.; and a Doctor of Nursing Practice degree, or DNP.

A law degree, known as a juris doctor or J.D., as well as a Doctor of Medicine degree, or M.D., are also considered professional doctorates.

How to Get a Doctorate

Getting a doctorate is challenging. It ordinarily requires a series of rigorous classes in a field of study and then passage of a qualification exam in order to begin work on a dissertation, which is the final project.

Dissertations are difficult to write, says David Harpool, vice president of graduate and online programs at Newberry College in South Carolina. Some research indicates that only about half of doctoral students go on to finish their degree, and a main reason is that many never finish and successfully defend their dissertation

"Many of them are in programs that permit them to earn a master’s on the way to a doctorate," Harpool, who earned a Ph.D. from Saint Louis University in Missouri and a J.D. from the University of Missouri , wrote in an email. "The transition from mastering a discipline to creating new knowledge (or at least applying new knowledge in a different way), is difficult, even for outstanding students."

Learn about how M.D.-Ph.D. programs

There is a often a "huge shift in culture" at doctoral programs compared to undergraduate or master's level programs, says Angela Warfield, who earned a Ph.D. in English from the University of Iowa.

Doctoral professors and students have more of a collaborative relationship where they function as colleagues, she says. And there's pressure on each student to produce "significant and original research."

Many full-time doctoral students work for the school as researchers or teaching assistants throughout their program, so time management is crucial to avoid burnout. However, the dissertation "is by far the biggest battle," she says. The goal is to avoid an "ABD," she says, meaning "all but dissertation."

"In my writing group, we had two motivational slogans: 'ABD is not a degree,' and 'a good dissertation is a done dissertation,'" Warfield, now the principal consultant and founder of admissions consulting firm Compass Academics, wrote in an email.

How Are Doctorate Admissions Decisions Made?

Admissions standards for doctoral programs vary depending on the type of doctorate, experts say.

The quality of a candidate's research is a distinguishing factor in admissions decisions, Madanat says. Meanwhile, leaders of clinical and professional doctorate programs say that the quality of a prospective student's work experience matters most.

Doctoral programs typically expect students to have a strong undergraduate transcript , excellent letters of recommendation and, in some cases, high scores on the Graduate Record Examination , or GRE, Endlich says.

"The size of the programs may be relatively small, and universities need to be sure that applicants will be able to handle the demands of their programs," he says.

Because professional doctorates often require students to come up with effective solutions to systemic problems, eligibility for these doctorates is often restricted to applicants with extensive first-hand work experience with these problems, according to recipients of professional doctorates.

In contrast, it's common for Ph.D. students to begin their programs immediately after receiving an undergraduate degree. The admissions criteria at Ph.D. programs emphasize undergraduate grades, standardized test scores and research projects , and these programs don't necessarily require work experience.

Admissions decisions may also depend on available funding, says Madanat, who works with doctoral students to provide funding, workshops and faculty support to help their research.

Who Is a Good Fit for a Doctoral Program?

Doctoral degree hopefuls "should be interested in making a deep impact on their field, open-minded, eager to learn, curious, adaptable and self-motivated," Madanat says. "Doctoral programs are best suited for those whose goals are to transform and change the fields they are studying and want to make a difference in the way the world is."

Someone who loves to study a subject in great depth, can work alone or in teams, is highly motivated and wants to develop research skills may be a good candidate for a doctoral program, Endlich says.

Because of the tremendous effort and time investment involved in earning a doctorate, experts say it's foolish to apply to a doctoral program if it's unclear how you might use a doctorate in your career.

"The students are being trained with depth of knowledge in the discipline to prepare them for critical thinking beyond the current state of the field," Madanat says. "Students should consider the reasons that they are pursuing a doctoral degree and whether or not it aligns with their future professional goals, their family circumstances and finances."

Rachel D. Miller, a licensed marriage and family therapist who completed a Ph.D. degree in couples and family therapy at Adler University in Illinois in 2023, says pursuing a doctorate required her to make significant personal sacrifices because she had to take on large student loans and she needed to devote a lot of time and energy to her program. Miller says balancing work, home life and health issues with the demands of a Ph.D. program was difficult.

For some students, the financial component may be hard to overlook, Warfield notes.

"Student debt is no joke, and students pursuing graduate work are likely only compounding undergraduate debt," she says. "They need to really consider the payoff potential of the time and money sacrifice."

To offset costs, some programs are fully funded, waiving tuition and fees and providing an annual stipend. Some offer health insurance and other benefits. Students can also earn money by teaching at the university or through fellowships, but those adding more to their plate should possess strong time management skills, experts say.

"Graduate school, and higher education in general, can be brutal on your physical and mental health," Miller wrote in an email.

But Miller says the time and effort invested in her doctoral program paid off by allowing her to conduct meaningful research into the best way to provide therapy to children affected by high-conflict divorce and domestic violence. She now owns a therapy practice in Chicago.

Miller urges prospective doctoral students to reflect on whether getting a doctorate is necessary for them to achieve their dream job. "Really know yourself. Know your purpose for pursuing it, because that's what's going to help carry you through."

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abbreviation for

• Doctor of Philosophy AlsoDPhil

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Example sentences.

He also bragged about earning a PhD, a point Smerconish did not question.

Even his nametag played up his dweeby nature, labeling him “Mr. Gruber, PhD.”

Throughout her life, she faced public ridicule, legal persecution and, eventually, redemption through a PhD in clinical sexology.

“It is impossible by elections to choose normal people,” argues Yoram Gat, an Israeli software engineer with a PhD in statistics.

The son of Taiwanese immigrants, he grew up in California and earned his PhD in neuroscience at Stanford.

Damn few of them got it from me, I'm happy to say, and those that did, knew more about the subject than most PhD's.

It was a great diversion from the late nights working on my PhD.

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Definition of PhD noun from the Oxford Advanced Learner's Dictionary

• to do/have/be a PhD
• Anne Thomas, PhD
• acquire/​get/​lack (an) education/​training/ (British English) (some) qualifications
• receive/​provide somebody with training/​tuition
• develop/​design/​plan a curriculum/ (especially British English) course/ (North American English) program/​syllabus
• give/​go to/​attend a class/​lesson/​lecture/​seminar
• hold/​run/​conduct a class/​seminar/​workshop
• sign up for/​take a course/​classes/​lessons
• go to/​start preschool/​kindergarten/​nursery school
• be in (North American English) the first, second, etc. grade/ (British English) year 1, 2. etc. (at school)
• study/​take/​drop history/​chemistry/​German, etc.
• (British English) leave/​finish/​drop out of/ (North American English) quit school
• (North American English) graduate high school/​college
• be the victim/​target of bullying
• (British English) play truant from/ (both British English, informal) bunk off/​skive off school (= not go to school when you should)
• (both especially North American English) skip/​cut class/​school
• (British English) cheat in/ (North American English) cheat on an exam/​a test
• get/​be given a detention (for doing something)
• be expelled from/​be suspended from school
• do your homework/ (British English) revision/​a project on something
• work on/​write/​do/​submit an essay/​a dissertation/​a thesis/​an assignment/ (North American English) a paper
• finish/​complete your dissertation/​thesis/​studies/​coursework
• hand in/ (North American English) turn in your homework/​essay/​assignment/​paper
• study/​prepare/ (British English) revise/ (North American English) review/ (North American English, informal) cram for a test/​an exam
• take/ (both British English) do/​sit a test/​an exam
• (especially British English) mark/ (especially North American English) grade homework/​a test
• (British English) do well in/ (North American English) do well on/ (especially North American English, informal) ace a test/​an exam
• pass/​fail/ (especially North American English, informal) flunk a test/​an exam/​a class/​a course/​a subject
• apply to/​get into/​go to/​start college/ (British English) university
• leave/​graduate from law school/​college/ (British English) university (with a degree in computer science)
• study for/​take/ (British English) do/​complete a law degree/​a degree in physics
• (both North American English) major/​minor in biology/​philosophy
• earn/​receive/​be awarded/​get/​have/​hold a master’s degree/​a bachelor’s degree/​a PhD in economics
• dissertation

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What is a Doctorate: Everything You Need to Know

Do you already have a master's degree and want to continue your education? Maybe you’re still trying to determine what that means and what your next options are?

The pinnacle of educational attainment is the doctoral degree. But what exactly is a doctoral degree, what can you get your doctorate in and what is involved in the process? Consider this your introduction to doctoral degrees.

What Is a Doctorate Degree?

The doctorate is the most advanced academic degree you can earn, symbolizing that you have mastered a specific academic discipline or field of profession. Doctorate degrees require a significant level of research and articulation. Those who earn the degree must have researched a subject or topic thoroughly, conducted new research and analysis, and provided a new interpretation or solution to the field. Completing a doctorate program qualifies you for top-tier consulting and education career considerations and positions you as a leader in your field, giving you the edge to stay relevant in today’s competitive labor market. In many cases, completing a doctorate means achieving a lifelong personal goal.

Demand for Doctoral Degrees

The demand for doctorate degrees depends on specific fields and positions, but trends in degree completions can help paint a picture of the state of doctoral-level education. According to Lightcast Analytics, from 2012 to 2022, the total number of doctoral degree completions grew by 20%, from 170,815 to 205,341.  Doctoral categories that saw the greatest growth in demand over the 10-year period included Business , Management, Marketing and Related Programs (+75%), Computer and Information Sciences and Support Services (+64%), Education (+49%), Health Professions and Related Programs (+49%), and Engineering (+38%).

At a more granular level, doctoral programs that saw the greatest growth in demand included Occupational Therapy/Therapist (+1,134%), Nursing Practice (+614%), Organizational Leadership (+368%) and Social Work (+154%). Conversely, programs that saw the greatest decrease in demand included Divinity/Ministry (-42%), History (-26%), Law (-22%) and Psychology (-16%).  These trends show that increasingly complex and growing industries tend to require employees with higher levels of expertise, resulting in more demand for doctoral degree holders, while stagnant industries that require less skills development tend to need fewer experts and, thus, fewer employees may feel the need to pursue doctorates.

Earning a doctorate is challenging and rewarding, but do you know what to really expect? Download this free guide for tips and insights to help you prepare for success.  

The rise of online doctorate degrees.

Traditionally, higher education institutions only offered doctorates in person, but lately, there has been a shift toward flexible online education. According to Lightcast Analytics, distance-offered doctoral degrees saw a 237% increase in graduates from 2012 to 2022, while non-distance offered programs only grew by 6%.

The increase in online doctoral degrees is evident in the fields examined earlier. Distance offered completions increased by 150% for Law, 986% for Nursing Practice, 427% for Educational Leadership and Administration (General), and 243% for Business Administration and Management (General).  

So, what types of doctorates are available?

Two Types of Doctorate Degrees

There are two primary types of doctoral degrees : research-oriented degrees and professional application degrees (also called applied doctorates). The difference between the two types of programs may be murkier than you think. Here's a breakdown of the two common types of doctorate programs.

The Ph.D.: A Research-Oriented Doctorate

These research degrees are commonly referred to as Doctor of Philosophy (Ph.D.s). Some common research-oriented doctorates include the following:

• Doctor of Arts (D.A.)
• Doctor of Philosophy (Ph.D.)
• Doctor of Theology (Th.D.)
• Doctor of Public Health (DPH)

"Philosophy" refers to the concept of research and pursuit of knowledge, as opposed to the actual subject of philosophy. A core component of this type of degree is the dissertation process .

The Professional Doctorate: An Application-Oriented Program

A professional doctorate (also called an applied doctorate or terminal professional doctorate) is a degree that focuses on the application of a subject within real-world contexts or scenarios.

You'll likely want to pursue a professional doctorate if your goals include career advancement, meeting the requirements for specific high-level corporate jobs, establishing teaching credibility within the industry, or building a consulting business.

Some common professional doctorates include:

• Doctor of Business Administration (DBA)
• Doctor of Education (Ed.D.)
• Doctor of Healthcare Administration (DHA)
• Doctor of Professional Studies (DPS)
• Doctor of Finance (DPH)
• Doctor of Social Work (DSW)
• Doctor of Pharmacy (Pharm.D.)
• Juris Doctor (JD)

This type of doctorate program may or may not require a dissertation. Unlike the academia-focused research doctorate, the professional doctorate curriculum will encourage you to tackle real-world issues within your field, research, and present a solution.

How a Doctoral Degree Works

The path to a doctoral degree typically comprises four stages of coursework: a core set of research and prep classes, a set of major area emphasis courses, electives and dissertation courses.

The Research Core

In most doctoral programs, you begin the journey to your degree with a common core of classes. The research core establishes the foundational skills you will need to complete the level of work required for the degree. This core often includes advanced writing methods, research methodology and design, applied statistics, colloquium courses, and qualitative and quantitative research and analysis courses.

Major Focus Area

Once the research core is complete, you will typically take courses in your major emphasis of study.

For example,

• If you're earning a DBA ( Doctor of Business Administration ), you will likely take courses in organizational behavior, organizational systems, strategic thinking and decision making, ethics, and change management.
• If you're earning a DHA ( Doctor of Healthcare Administration ), you will likely take courses in healthcare policy and regulations, healthcare economics and finance, quality improvement and process improvement, and health information governance.
• If you're earning a Ph.D. in Human Services, you will likely take courses in advanced study in research methods for public service, social influences of behavior, ethics in decision making, and advanced communication for the human services leader.

In most doctoral programs, you must also take certain electives within your field. Taking electives helps provide a rounded worldview to apply your doctorate in real-world environments.

For example, if you're pursuing a Doctor of Education (Ed.D.), you can access focus areas like Higher Education Leadership , PK-12 Educational Leadership and Organizational Leadership .

Dissertation Requirements

Once you have completed your foundation work, major area of focus, and electives, you'll begin working on your dissertation. That can take different forms, determined by the Ph.D. or applied doctorate.

For Ph.D. students, the dissertation is typically a five-chapter dissertation, which is commonly broken into three phases. In phase 1, you'll submit a prospectus for approval from the dissertation committee. In phase 2, you'll finalize your dissertation's first chapters and begin collecting data. In phase 3, you'll complete the writing of your dissertation and orally defend it to the program leaders.

The dissertation may look different for applied doctorate students, as you will be required to create a solution to a real-world problem.

Investigate Dissertation Structures

Since your dissertation will be a crucial hurdle to defeat, you must know what you're getting yourself into from the beginning. Do some research on dissertation structures when you're looking at prospective schools to help narrow down your list. Ensuring the school will do everything to help you succeed with your dissertation can make all the difference when it comes down to crunch time.

Franklin University has intentionally designed a dissertation structure to help you complete your dissertation step-by-step, beginning with your enrollment in the program . The University also has built-in faculty mentoring, guidance and peer-to-peer support, so you're never left to "figure it out" alone.

For example, throughout your doctoral courses at Franklin, you'll develop essential research skills and the necessary writing prowess to publish a dissertation as a capstone project to your studies. Your dissertation will showcase your ability to identify a topic of interest within the workplace, develop a proposed solution to a problem, and test your hypotheses in the real world.

How Long Will It Take to Earn Your Doctoral Degree?

The answer depends on the path you choose. A doctoral degree program requires anywhere from 60 to 120 semester credit hours (or approximately 20-40 college classes). Most Ph.D.s require 120 hours, while most applied doctorates are closer to the lower end of that spectrum. For example, the DBA and DHA at Franklin require only 58 hours. On average, a Ph.D. may take up to eight years to complete . A doctorate degree typically takes four to six years to complete—however, this timing depends on the program design, the subject area you're studying, and the institution offering the program. Pro Tip: Some innovative institutions like Franklin University have streamlined their doctorate degree programs and offer creative transfer options . The program design, which includes an embedded dissertation and a community of support, also helps students earn their doctorate in as little as three years .

Who is a Good Fit For a Doctoral Program?

Other than holding a relevant master's degree or having professional experience, good doctoral students are organized, curious and have the time management skills to manage many tasks in their lives. Doctorate degrees can increase your current wage, open doors to roles in higher education or fulfill a lifelong desire. 

Many doctoral candidates have full-time jobs and families and are active in their community; therefore, it is vital to have a strong motivation and resilience to pursue a doctorate. However, it is worthwhile because the impact of a doctorate on an individual's career and personal growth can be life-changing. 

"I went from a successful 27-year career in the electric utility industry to higher education. This change has allowed me to positively affect literally thousands of lives over the past 18 years I have spent as a full-time educator," said Dr. Wendell Seaborne, the Dean of Doctoral Studies & Academic Research at Franklin University. 

Franklin University provides applied doctorates with 8-week courses and recorded sessions for asynchronous learning designed for working professionals with personal commitments and a dream to make a change. 

Why Choose to Earn a Doctorate Degree?

A doctoral program is a serious commitment with a serious return on investment for master's degree holders.

If you want to teach at a higher education institution, the degree is needed to get in the door. If you’d like to move into industry leadership, the degree can deliver substantial credibility. And, if you're eyeing that top-floor corner office, the degree can be a huge differentiator.

So, which one is right for you—research or applied? Check out these five truths about Applied Doctorates to learn more.

Related Articles

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• Cambridge Dictionary +Plus

Meaning of PhD in English

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• associate's degree
• baccalaureate
• bachelor's degree
• first degree
• summa cum laude

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• PhD vs MD – Differences explained
• Types of Doctorates

A MD is a Doctor of Medicine, whilst a PhD is a Doctor of Philosophy. A MD program focuses on the application of medicine to diagnose and treat patients. A PhD program research focuses on research (in any field) to expand knowledge.

Introduction

This article will outline the key differences between a MD and a PhD. If you are unsure of which degree is suitable for you, then read on to find out the focuses and typical career paths of both. Please note this article has been written for the perspective of a US audience.

What is a MD?

MD (also seen stylized as M.D and M.D.) comes from the Latin term Medicīnae Doctor and denotes a Doctor of Medicine.

MDs practice allopathic medicine (they use modern medicine to treat symptoms and diseases). A common example would be your physician, though there are numerous types of medical doctors, with different areas of speciality and as such may be referred to differently.

What is a PhD?

A PhD (sometimes seen stylized as Ph.D.) comes from the Latin term Philosophiae Doctor and denotes a Doctor of Philosophy.

A PhD can be awarded for carrying out original research in any field, not just medicine. In comparison to an MD, a PhD in a Medicinal field is focused on finding out new knowledge, as opposed to applying current knowledge.

A PhD in Medicine therefore does not require you to attend medical school or complete a residency program. Instead, you are required to produce a thesis (which summarizes your research findings) and defend your work in an oral examination.

What is the difference between a MD and a PhD?

Both are Doctoral Degrees, and someone with either degree can be referred to as a doctor. But for clarity, MDs are awarded to those with expertise in practicing medicine and are therefore more likely to be found in clinical environments. PhDs are awarded to researchers, and are therefore more likely to be found in academic environments.

This does not mean that MDs cannot pursue a research career, nor does it mean that a PhD cannot pursue clinical practice. It does mean, however, that PhDs are more suited to those who would wish to pursue a career in research, and that MDs are more suited to those who prefer the clinical aspects of medicine or aspire to become a practicing physician.

It should also be noted that a medical PhD doctorates possess transferable skills which make them desirable to various employers. Their familiarity with the scientific method and research experience makes them well suited to industry work beyond medical research.

Program structure and time

The standard MD program structure sees students undertake 2 years of coursework and classroom-based learning, before undertaking 2 years of rotational work in a clinical environment (such as a hospital). Getting an MD requires attending a medical school (accredited by the Liaison Committee on Medical Education) and completing a residency program. Both of which prepare students to diagnose patients and practice clinical medicine.

The standard PhD program lasts 5 to 7 years and sees students undertake original research (monitored by a supervisor). Getting a PhD requires the contribution of novel findings, which leads to the advancement of knowledge within your field of research. With the exception of some clinical PhDs, a PhD alone is not enough to be able to prescribe medicine.

PhD doctorates are required to summarize the purpose, methodology, findings and significance of their research in a thesis. The final step is the ‘ Viva Voce ’ where the student must defend their thesis to a panel of examiners.

To summarize, a MD program usually lasts 4 years, whilst a PhD program lasts 5 to 7 years. Before being licensed to practice medicine, however, you must first complete a residency program which can last between 3 to 7 years.

What is a MD/PhD?

A MD/PhD is a dual doctoral degree. The program alternates between clinical focused learning and research focused work. This is ideal for those who are interested in both aspects of medicine. According to the Association of American Medical Colleges, an estimated 600 students matriculate into MD-PhD programs each year .

The typical length of a MD/PhD program is 7 to 8 years, almost twice the length of a MD alone. As with a MD, MD/PhDs are still required to attend medical school and must complete a residency program before being able to practice medicine.

In comparison to PhD and MD programs, MD/PhD positions in the United States are scarce and consequently more competitive. The tuition fees for MD/PhD positions are typically much lower than MD and PhD positions are sometimes waived completely.

Those who possess a MD/PhD are commonly referred to as medical scientists. The ability to combine their medical knowledge with research skills enables MD/PhDs to work in a wide range of positions from academia to industrial research.

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Definition of doctor

 (Entry 1 of 2)

called also doctor of the church

Definition of doctor  (Entry 2 of 2)

transitive verb

intransitive verb

• croaker [ slang ]
• sawbones [ slang ]

Examples of doctor in a Sentence

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'doctor.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Noun and Verb

Middle English doctour teacher, doctor, from Anglo-French & Medieval Latin; Anglo-French, from Medieval Latin doctor , from Latin, teacher, from docēre to teach — more at docile

14th century, in the meaning defined at sense 1a

1712, in the meaning defined at transitive sense 1a

Phrases Containing doctor

• doctor of medicine
• doctor of osteopathic medicine
• doctor of osteopathy
• doctor of philosophy
• family doctor
• herb doctor
• just what the doctor ordered
• snake doctor
• spin doctor
• the doctor's
• under a doctor's care
• witch doctor

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Dictionary Entries Near doctor

Cite this entry.

“Doctor.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/doctor. Accessed 27 Apr. 2024.

Kids Definition

Kids definition of doctor.

Kids Definition of doctor  (Entry 2 of 2)

Middle English doctour "doctor, teacher," from early French doctour and Latin doctor (both, same meaning), from earlier Latin doctor "teacher," from docēre "to teach" — related to docile , doctrine

Medical Definition

Medical definition of doctor.

Medical Definition of doctor  (Entry 2 of 2)

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Nglish: Translation of doctor for Spanish Speakers

Britannica English: Translation of doctor for Arabic Speakers

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