what are key assumptions in a business plan

What Are Key Assumptions of a Business Plan?

A business plan is a document that outlines the strategy and goals of a business.

It serves as a roadmap for the company, helping it stay on track and achieve its objectives.

A key aspect of any business plan is the assumptions it is built on. These assumptions are the underlying beliefs and assumptions that the business plan is based on and that help shape the way the company operates and makes decisions.

In this blog post, we will take a closer look at what key assumptions are and why they are important for the success of a business.

What are key assumptions?

Key assumptions are the underlying beliefs and assumptions that shape the way a business operates and makes decisions.

They can be related to various aspects of the business, including its target market, competitive landscape, revenue streams, and financial projections. These assumptions serve as the foundation of a business plan, and they help the company make informed decisions about its strategy and goals.

It is important for a business to carefully consider its key assumptions, as they can have a significant impact on the overall success of the company.

If the assumptions are not well thought out or are overly optimistic, the business plan may be based on false premises, leading to poor decision-making and ultimately, failure.

On the other hand, if the assumptions are well-founded and realistic, they can help the business navigate challenges and make informed decisions that lead to long-term success.

Why are key assumptions important in a business plan?

Key assumptions are a crucial part of a business plan because they help the company make informed decisions about its strategy and goals.

By clearly outlining the underlying beliefs and assumptions on which the business plan is based, a company can better understand the potential risks and opportunities it may face, and make decisions accordingly.

For example, if a company assumes that its target market is a specific demographic with certain buying habits, it can tailor its marketing efforts and product offerings to meet the needs and preferences of that market.

If this assumption is incorrect, the company may struggle to reach its target market and may not be successful in selling its products or services.

In addition to informing decision-making , key assumptions can also help a company set realistic goals and financial projections.

By basing these projections on well-informed assumptions, a company can better understand the resources and investments it will need to achieve its goals and can allocate these resources accordingly.

In summary, key assumptions are a vital component of a business plan, as they help shape the direction and strategy of the company and inform decision-making and goal-setting.

It is important for a business to carefully consider and review its key assumptions to ensure that they are well-informed and realistic, to increase the chances of success.

Examples of key assumptions in a business plan

There are many different types of key assumptions that can be included in a business plan.

Here are some examples.

Target market assumptions

These assumptions relate to the characteristics and behavior of the customers that a company is targeting. For example, a business may assume that its target market is primarily young, tech-savvy individuals who are interested in sustainable products. This assumption would inform the company’s marketing efforts and product development.

Competitive landscape assumptions

These assumptions relate to the competition that a company may face in its industry. For example, a business may assume that there are several well-established competitors in its market and that it will need to differentiate itself to succeed. This assumption could influence the company’s pricing strategy and marketing efforts.

Revenue stream assumptions

These assumptions relate to the sources of income that a company expects to generate. For example, a business may assume that it will generate revenue from sales of its products, as well as from services it provides to customers. This assumption could inform the company’s pricing strategy and sales efforts.

Financial projections

These assumptions relate to the company’s financial performance and projections for the future. For example, a business may assume that it will achieve a certain level of sales and profit margins in the coming year, based on its target market, competitive landscape, and revenue streams. These assumptions would inform the company’s budget and resource allocation.

Considerations for making key assumptions in a business plan

When making key assumptions for a business plan, a company needs to consider several factors to ensure that the assumptions are well-informed and realistic.

Here are some key considerations.

A company needs to gather as much information as possible about its target market, competitive landscape, and other relevant factors. This can involve conducting market research, analyzing industry trends, and consulting with experts. By basing its assumptions on solid research, a company can increase the chances that they are accurate and well-informed.

Conservatism

While it is important for a business to be ambitious and strive for success, it is also important to be realistic and avoid making overly optimistic assumptions. By being conservative in its assumptions, a company can better manage its expectations and be better prepared to handle challenges and setbacks.

Flexibility

It is also important for a business to be flexible and open to adjusting its assumptions as needed. As the business grows and evolves, it may become clear that certain assumptions are no longer valid or accurate. By being open to revising its assumptions, a company can better adapt to changing circumstances and remain agile.

Tips for reviewing and updating key assumptions in a business plan

Once a business has established its key assumptions, it is important to regularly review and update them to ensure that they are still relevant and accurate.

Here are some tips for reviewing and updating key assumptions.

Regularly review and assess the accuracy of your assumptions

It is important to regularly review and assess the accuracy of your assumptions, especially as your business grows and changes. This can involve analyzing market trends, reviewing financial performance, and soliciting feedback from customers and employees.

By regularly reviewing your assumptions, you can ensure that they remain relevant and accurate.

Be open to revising your assumptions

As mentioned earlier, a business needs to be flexible and open to revising its assumptions as needed. If you discover that certain assumptions are no longer accurate or relevant, be willing to adjust them accordingly.

Communicate updates to your team

If you make changes to your key assumptions, it is important to communicate these updates to your team. This can help ensure that everyone is on the same page and working towards the same goals.

Use your updated assumptions to inform your decision-making

Once you have updated your key assumptions, be sure to use them to inform your decision-making and strategy moving forward. This can help ensure that your business is well-positioned to achieve its goals and succeed in the long term.

In conclusion, key assumptions are an important part of any business plan.

They are the underlying beliefs and assumptions that shape the way a business operates and makes decisions, and they inform the company’s strategy and goals.

By carefully considering and reviewing its key assumptions, a company can increase its chances of success by making informed decisions and setting realistic goals.

Some key considerations for making and reviewing key assumptions include researching, being conservative, and being flexible.

By following these tips, a business can ensure that its key assumptions are well-informed, relevant, and accurate, which can help it navigate challenges and achieve long-term success.

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Business Assumptions: Understanding Key Predictions in Entrepreneurship

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Business Assumptions Definition

Business assumptions refer to the expected financial and operational projections a business makes about future market conditions, business environment, and internal company dynamics that influence business decisions and strategy. They are yet-to-be-proven elements considered true for the purposes of planning and budgeting.

Types of Business Assumptions

Some key types of business assumptions that can play a significant role in shaping an entrepreneur’s business model and strategy include revenue assumptions, market size assumptions, and operational expense assumptions.

Revenue Assumptions

Revenue assumptions guide a company’s sales expectations, based on factors like pricing strategies and the volume of products or services they expect to sell. For instance, an ecommerce business may anticipate selling 1,000 units of a product every month, priced at $50 each. This results in a monthly revenue assumption of $50,000. It’s crucial to note that revenue assumptions should be realistic, grounded in market research and business analytics.

Market Size Assumptions

Market size is a critical factor in business forecasting. Market size assumptions can help a company estimate the total demand for their product or service within the target market. For companies launching a new product or venture, this might involve assuming the population size and demographic that will use their product. Similarly, for companies expanding into a new region, market size assumptions would include the potential customer base in that area. Misjudging the market size can lead to either overestimating or underestimating the potential for sales, both of which can negatively affect business planning and financial projections.

Operational Expense Assumptions

Operational expense assumptions encompass the anticipated costs required to maintain business operations, including rent, utilities, wages and salaries, maintenance, and technological infrastructure costs. These assumptions are crucial to controlling costs, planning for growth, and ensuring profitability. For example, a startup in the tech industry may anticipate needing large sums of capital for software development, tech hardware, and skilled personnel. On the other hand, a small retail business would focus more on rent and product costs. Understanding these operational costs will contribute to more accurate financial planning and prevent budget overruns.

The Role of Business Assumptions in Financial Planning

Business assumptions play a pivotal role in the entire financial planning process. They form the backbone of the strategic decision-making process and significantly impact budgeting, forecasting, and strategic planning initiatives of any business.

Budgeting refers to a financial plan that quantifies the expectations of revenues that a business wants to achieve for a future period. It uses business assumptions as a foundation to estimate both income and expenditure for a certain period. For example, a business might assume a specific rate of growth in sales based on factors like past trends, marketing strategies in place, and market research data. These assumptions, in turn, dictate how much can be spent on different business activities within the set budget.

Forecasting

Forecasting, on the other hand, is an estimation or prediction of future developments in business such as sales, expenditures, and profits. Given its predictive nature, forecasting heavily relies on business assumptions. Forecasting might involve assumptions on variables like future demand for the company’s products or services, price changes, cost inflation, or possible changes in the economy or industry. These assumptions help gauge what future performance might look like and guide decision making on matters such as investment in new projects.

Strategic Planning

Strategic planning is a process of setting long-term goals for the business and determining the best approach to achieve these goals. Business assumptions are used in this stage to consider various scenarios and their potential outcomes. For instance, a business might assume a particular market growth rate based on trends, competitor analysis, and industry insights. Depending on these assumptions, strategies are then formulated to achieve set objectives, such as entering a new market, launching a new product, or improving market share.

In conclusion, the role of business assumptions in financial planning cannot be overstated. They provide a well-defined path for budgeting, forecasting, and strategic planning, enabling businesses to make informed financial decisions and strategic choices. They act as a bridge between the present state of a company and its future vision, helping in efficient capital allocation and risk management.

The Impact of Business Assumptions on Risk Assessment

Business assumptions and risk assessment.

When conducting risk assessment exercises, the influence of business assumptions can be substantial. Assumptions help to create a framework for anticipating potential scenarios, providing a sort of guide or roadmap for decision-making. However, these guiding assumptions can color the ways in which risks are perceived and managed.

Consider a company planning a new product launch. It may hold certain assumptions about customer demand, manufacturing capabilities, and market trends. These assumptions will shape how the company perceives potential risks associated with the launch. It might focus on tackling risks that align with its assumptions while neglecting those that don’t.

The Pitfall of Over-Optimism

An overly optimistic business assumption could lead to underestimation of potential risks. If a company anticipates high demand for its new product, it may neglect to adequately consider the risks of low customer demand, poor product reception, or the presence of competent competitors. This, in turn, may result in an insufficient contingency plan, increasing the company’s vulnerability to unforeseen circumstances.

Similarly, a business that assumes a seamless manufacturing process may fail to take into account possible challenges or disruptions. It may not adequately prepare for supply chain disruption, equipment failure, or manpower shortage, all of which increase operational risk.

The Danger of Over-Pessimism

On the other hand, overly pessimistic business assumptions may lead to an over-focus on avoiding negative outcomes. This could stifle innovation and aggressive strategic moves, limiting the business’s ability to seize growth opportunities.

A company expecting extremely low demand for its new product might overestimate the potential risks, devote excessive resources to contingency planning, and divert capital from investments in growth-driving activities such as research and development or marketing. This overly conservative approach could lead to missed opportunities and prevent the business from achieving its full potential.

In conclusion, striking a balance between optimism and pessimism in business assumptions is key in risk assessment. A well-considered, realistic assumption can help businesses navigate potential obstacles while still keeping sight of growth opportunities.

Criticality of Validating Business Assumptions

Ensuring the validity of business assumptions is a critical step in strategic planning and decision making. Assumptions, by definition, are subject to scrutiny and must be verified to establish their accuracy. The consequences of unverified or inaccurately-based assumptions can have far-reaching impacts, potentially jeopardizing a business’s competitiveness and overall success.

Methods for Validating Business Assumptions

There are various approaches to validating business assumptions. The choice of method often depends on the nature of the assumption and the context in which it is being applied.

Market Research

One of the most common methods is market research. This may involve surveys, focus groups, interviews, or analysis of secondary data like existing research reports and public market data. For instance, if the business assumption is about customer preferences or behavior, conducting a survey or organizing focus groups may provide insights to either validate or question the assumption.

Furthermore, market research is particularly useful in analyzing external business environment factors. It provides data on market trends, demographics, consumer preferences, and competitor analysis that can help in forming accurate assumptions.

Example of Markdown for Market Research

Hypothesis Testing

Another approach is through hypothesis testing. Essentially, this consists of establishing a null hypothesis that opposes the business assumption. Subsequently, relevant data is collected and analyzed to either accept or reject the null hypothesis.

For example, if a business assumes that a new product will increase sales by 10%, the null hypothesis would state that the new product will not lead to any change in sales. Following this, the company can monitor sales to confirm or disprove their assumption.

Example of Markdown for Hypothesis Testing

These methods, coupled with a persistent and critical approach to the validation process, can prevent the costly implications of inaccurate assumptions, enhancing the decision-making process. It’s vital to remember that business conditions are continually changing, necessitating regular reviews and validations of our business assumptions.

Business Assumptions in Startup Ecosystems

Startups operate in volatile environments with varying degrees of uncertainty, and business assumptions form the structural framework on which their financial modeling and investment pitches are built. Financial models for startups are primarily created to forecast potential revenues and expenditures, identify integral key drivers for growth, calculate the necessity and timing for external funding, and, in the process, model possible financial performance based on a set of assumptions.

Let’s first look at Financial Modeling . In this context, important assumptions usually revolve around the total addressable market size, product pricing, estimated customer acquisition costs, churn rates, revenue growth, and cost structure. It also includes assumptions concerning the competitive landscape and how the startup’s offering would fare against it. These assumptions are quite critical to forecasting the startup’s revenues, costs, cash flow and hence, its profitability and financial viability in the long run.

Parallelly, Investor presentations and Pitches rely heavily on the credibility of these business assumptions. Investors scrutinize these assumptions for their validity, robustness, and flexibility under changing circumstances. The quality and realistic nature of business assumptions act as a mirror, reflecting the strategic acumen and forward-thinking capability of the entrepreneurial team. However, it’s important for founders to balance ambition with pragmatism. While it’s essential to show potential for high growth and attractive returns, over-ambitious or unrealistic assumptions might raise skepticism among investors and might hinder their chances of securing investment.

The implication of business assumptions for early-stage entrepreneurs are far reaching. Not only do they guide the strategic decisions but also help in foreseeing challenges and planning for contingencies. It’s quite common for initial business assumptions to be off-target since they are based on limited information and insights. Over time though, with increasing market knowledge and operational experiences, these assumptions should evolve to become more accurate and reliable. Consequently, it’s critical for startups to regularly re-visit and update their business assumptions, aligning them with their real-time learnings and changing market dynamics.

Furthermore, it’s crucial for entrepreneurs to clearly communicate the basis of these business assumptions to their team and investors. This transparency fosters trust, promotes collective understanding and provides the foundation for strategic alignment across the organization. It also demonstrates to potential investors the team’s ability to critically analyze their business environment, thereby strengthening their confidence in the entrepreneurial team and hence, the startup.

At the end, it’s important to remember, business assumptions are just assumptions. They serve as a guide rather than the absolute truth. Thus, while they can drastically improve the chances of startup success, they should be utilized with caution, flexibility, and a good degree of open-minded skepticism.

Link Between Business Assumptions and Sustainable Business Models

Understanding the link between business assumptions and sustainable business models is crucial for business longevity.

The Role of Business Assumptions in Creating Sustainable Business Models

In creating a sustainable business model, it is critical for businesses to establish accurate business assumptions. This is because the underlying assumptions will carve the path for the business’s approach to maintain economic, social, and environmental value over the long term.

For instance, assumptions about customer preferences can influence the business’s strategy in offering eco-friendly products. If the business assumes that the customer base values environmental stewardship, it might adopt a model based on the offer of sustainable goods. This impacts resource utilization, easing pressure on finite resources by supporting more ethical supply chains.

Business Assumptions Impact on Long-term Viability

Moreover, business assumptions regarding costs, revenues, and market dynamics can greatly influence long-term viability. If a firm assumes steady growth and stable market conditions, it is likely to focus on expanding operations and increasing revenues. However, these assumptions might not hold in times of economic downturns. So businesses need to constantly rethink and reevaluate their assumptions, adapting their strategies to reflect the realities of their operating environment.

The Influence on Corporate Social Responsibility

Business assumptions also play a considerable role in shaping a business’s Corporate Social Responsibility (CSR) initiatives. If a firm assumes that their stakeholders value CSR, the business model might incorporate CSR initiatives to drive sustainability. This impacts not only environmental sustainability but also social sustainability. By making such strategic decisions, businesses can enhance their reputation, drive customer loyalty and ultimately secure their market position.

In summary, the assumptions a business operates under may significantly affect the formulation and success of their sustainable business models. Regular review and adjustment of these assumptions allow for a more accurate, resonate, and ultimately successful approach to sustainability.

Guidelines for Making Reasonable Business Assumptions

When crafting business assumptions, the ultimate goal is making them as reasonable and realistic as possible. A well-reasoned assumption lies at the heart of any prudent business decision. Here are effective guidelines to follow:

Adopt a Conservative Approach

It is wise to err on the side of caution. Over-optimistic assumptions can spiral into unattainable goals and failed operational plans. Therefore, a conservative approach is often best. For instance, overestimate your costs and underestimate your revenues. This stance creates a buffer for unpredictable market events and uncontrollable factors that might increase your costs or decrease revenues.

Consider Current Market Trends

To make the most realistic assumptions, current market trends must be considered. This means regularly monitoring and familiarly understanding your industry trends while keeping an eye on the broader economic landscape. Your assumptions should align with these trends. For instance, if the trend shows a decline in the market segment that corresponds to your product, it would be unrealistic to assume robust growth in your sales.

Regular Review and Update of Assumptions

Business assumptions should never be stagnant. As you gather more data, and as the business climate evolves, your assumptions should, too. Regular reviews and updates of your assumptions can help significantly in keeping your business strategy relevant and realistic. It also allows you to assess view your business situation from different angles and make swift pivots when necessary.

Sound Underlying Logic

Every business assumption you make should have a sound underlying logic. It shouldn’t merely be a number picked out of thin air. When setting assumptions, make sure to document the reasoning behind each one. This approach allows for healthy discussion and challenge of the figures and underlying methodologies.

Adopting these guidelines helps create business assumptions that reflect reality and are defensible, increasing the likelihood of creating a viable and successful business strategy.

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Questioning Key Assumptions in Your Business Plan

Asking the hard questions now will save you time and money in the future

Amanda McCormick is an entrepreneur, marketing consultant, and content strategist who has worked with arts and government organizations, including the New York City Ballet. She is the co-founder of a small marketing agency focused on arts and media companies.

Is There a Need for Your Product or Service?

Is there a significant customer base, can your business turn a profit, are you the right person to run your business, is your business funded appropriately, the swot analysis, frequently asked questions (faqs).

The Balance / Getty Images

Constructing a business plan is all about looking at and confronting assumptions. Consider the five following key assumptions, and you'll have a business plan—and future—in which you can be confident.

Key Takeaways

• A business plan is a document that helps a business communicate and organize its plans and strategies for the future.
• Sufficient market research is perhaps the most important part of starting a business.
• A SWOT analysis clarifies the business' strengths, weaknesses, opportunities, and threats.
• Asking yourself if you have the expertise to run all aspects of the business and whether or not you have sufficient capital is also important.

It's an obvious question, but many entrepreneurs overlook it. Knowing that there's a need for your product is different than having a hunch or a feeling. How do you know the difference? You do the research to find out. First, look at the competition. Are there others who have a similar offering and are they profitable?

Maybe you are breaking new ground -- that's no excuse for saying "there is no competition." Look around for evidence that your proposed business fulfills a concrete need. Without evidence to validate the need for your business, your business plan will fail.

As of December 2021, there were 32,540,953 million small businesses in the U.S.

The second assumption that's important to look at in your business planning preparation is whether or not there is a significant customer base for the business you are proposing. It can be a highly subjective question, as there are a number of successful niche businesses that serve small markets quite profitably. You are well-served to look at the concrete size of a potential market and to assign real dollar values to its potential.

Once you can decide that A) there is a need for your business and B) there is a sizable market for it, you are on solid ground to establish your business's potential profitability. But don't pluck numbers from the air.

You'll need to figure out what your startup costs are, as well as ongoing business-related expenses. You'll need to figure out a pricing structure that your customers will pay and will generate enough cash flow to keep the business running. After generating a set of realistic financial projections, you'll have a solid picture of your business' profit potential.

You believe in your business. You eat, sleep, and breathe it. But you're still going to have to make the case why you are uniquely qualified to start and run the business. As CEO, you'll also need to demonstrate the ability to delegate and find employees to complement your weaker points. First, know yourself, and second, be able to find the right people to bring into your management structure.

Financial projections are the place in the business plan that investors will flip to first. They want to know if you can understand the financial bottom line of running a business, or if your vision is unrealistic. Demonstrate in your business plan that you have a realistic startup budget, and you don't expect revenue to pour in within the first few months magically. Show that you have sufficient capitalization to run the business to break even.

Lack of sufficient capital is cited again and again as one of the top reasons why businesses fail.

A SWOT analysis , which stands for Strengths, Weaknesses, Opportunities, and Threats and is a popular strategic framework for business planners, is a great tool for questioning assumptions. The first two items refer to qualities that are internal to the business. The second two items are external factors. Consider the following in questioning your assumptions in writing a business plan around your fledgling operation:

• What does this company do well?
• What are our assets?
• What expert or specialized knowledge does the company have?
• What advantages do we have over competitors?
• What makes us unique?
• What resources do we lack?
• Where can we improve?
• What parts of the business are not profitable?
• What costs us the most time and money?

Opportunities

• What has the competition missed?
• What are the emerging needs of the customer?
• How can we use technology to cut costs and enhance reach?
• Are there new market segments to exploit?
• What are our competitors doing well?
• How do larger forces in the economy affecting our business?
• What is happening in the industry?

What is a SWOT analysis?

A SWOT analysis is a popular strategic framework used by business owners. It is performed throughout a business' existence and asks about its Strengths, Weaknesses, Opportunities, and Threats.

What percent of businesses fail within the first year?

According to data from the Bureau of Labor Statistics, around 1 in 5 (18.4%) of businesses fail within the first year and nearly half (49.7%) fail in the first five years.

Small Business Association. " Frequently Asked Questions ."

Small Business Association. " Selecting a Business That Fits ."

Bureau of Labor Statistics. " Survival of Private Sector Establishments by Opening Year ."

Financial Assumptions and Your Business Plan

Written by Dave Lavinsky

Financial assumptions are an integral part of a well-written business plan. You can’t accurately forecast the future without them. Invest the time to write solid assumptions so you have a good foundation for your financial forecast.

Download our Ultimate Business Plan Template here

What are Financial Assumptions?

Financial assumptions are the guidelines you give your business plan to follow. They can range from financial forecasts about costs, revenue, return on investment, and operating and startup expenses. Basically, financial assumptions serve as a forecast of what your business will do in the future. You need to include them so that anyone reading your plan will have some idea of how accurate its projections may be.

Of course, your financial assumptions should accurately reflect the information you’ve given in your business plan and they should be reasonably accurate. You need to keep this in mind when you make them because if you make outlandish claims, it will make people less likely to believe any part of your business plan including other financial projections that may be accurate.

That’s why you always want to err on the side of caution when it comes to financial assumptions for your business plan. The more conservative your assumptions are the more likely you’ll be able to hit them, and the less likely you’ll be off by so much that people will ignore everything in your plan.

Why are Financial Assumptions Important?

Many investors skip straight to the financial section of your business plan. It is critical that your assumptions and projections in this section be realistic. Plans that show penetration, operating margin, and revenues per employee figures that are poorly reasoned; internally inconsistent, or simply unrealistic greatly damage the credibility of the entire business plan. In contrast, sober, well-reasoned financial assumptions and projections communicate operational maturity and credibility.

For instance, if the company is categorized as a networking infrastructure firm, and the business plan projects 80% operating margins, investors will raise a red flag. This is because investors can readily access the operating margins of publicly-traded networking infrastructure firms and find that none have operating margins this high.

As much as possible, the financial assumptions should be based on actual results from your or other firms. As the example above indicates, it is fairly easy to look at a public company’s operating margins and use these margins to approximate your own. Likewise, the business plan should base revenue growth on other firms. 

Many firms find this impossible, since they believe they have a breakthrough product in their market, and no other company compares. In such a case, base revenue growth on companies in other industries that have had breakthrough products. If you expect to grow even faster than they did (maybe because of new technologies that those firms weren’t able to employ), you can include more aggressive assumptions in your business plan as long as you explain them in the text.

The financial assumptions can either enhance or significantly harm your business plan’s chances of assisting you in the capital-raising process. By doing the research to develop realistic assumptions, based on actual results of your or other companies, the financials can bolster your firm’s chances of winning investors. As importantly, the more realistic financials will also provide a better roadmap for your company’s success.

    Finish Your Business Plan Today!

Financial assumptions vs projections.

Financial Assumptions – Estimates of future financial results that are based on historical data, an understanding of the business, and a company’s operational strategy.

Financial Projections – Estimates of future financial results that are calculated from the assumptions factored into the financial model.

The assumptions are your best guesses of what the future holds; the financial projections are numerical versions of those assumptions. 

Key Assumptions By Financial Statement

Below you will find a list of the key business assumptions by the financial statement:

Income Statement

The income statement assumptions should include revenue, cost of goods sold, operating expenses, and depreciation/amortization, as well as any other line items that will impact the income statement.

When you are projecting future operating expenses, you should project these figures based on historical information and then adjust them as necessary with the intent to optimize and/or minimize them.

Balance Sheet

The balance sheet assumptions should include assets, liabilities, and owner’s equity, as well as any other line items that will impact the balance sheet. One of the most common mistakes is not including all cash inflows and outflows.

Cash Flow Statement

Cash flow assumptions should be made, but they do not impact the balance sheet or income statement until actually received or paid. You can include the cumulative cash flow assumption on the financial model to be sure it is included with each year’s projections. 

The cumulative cash flow assumption is useful for showing your investors and potential investors how you will spend the money raised. This line item indicates how much of the initial investment will be spent each year, which allows you to control your spending over time.

Notes to Financial Statements

The notes to financial statements should explain assumptions made by management regarding accounting policies, carrying value of long-lived assets, goodwill impairment testing, contingencies, and income taxes. It is important not only to list these items within the notes but also to provide a brief explanation.

What are the Assumptions Needed in Preparing a Financial Model?

In our article on “ How to Create Financial Projections for Your Business Plan ,” we list the 25+ most common assumptions to include in your financial model. Below are a few of them:

For EACH key product or service you offer:

• What is the number of units you expect to sell each month?
• What is your expected monthly sales growth rate?

For EACH subscription/membership you offer:

• What is the monthly/quarterly/annual price of your membership?
• How many members do you have now or how many members do you expect to gain in the first month/quarter/year?

Cost Assumptions

• What is your monthly salary? What is the annual growth rate in your salary?
• What is your monthly salary for the rest of your team? What is the expected annual growth rate in your team’s salaries?
• What is your initial monthly marketing expense? What is the expected annual growth rate in your marketing expense?

Assumptions related to Capital Expenditures, Funding, Tax and Balance Sheet Items

• How much money do you need for capital expenditures in your first year  (to buy computers, desks, equipment, space build-out, etc.)
• How much other funding do you need right now?
• What is the number of years in which your debt (loan) must be paid back

Properly Preparing Your Financial Assumptions

So how do you prepare your financial assumptions? It’s recommended that you use a spreadsheet program like Microsoft Excel. You’ll need to create separate columns for each line item and then fill in the cells with the example information described below.

Part 1 – Current Financials

Year to date (YTD) units sold and units forecast for next year. This is the same as YTD revenue, but you divide by the number of days in the period to get an average daily amount. If your plan includes a pro forma financial section, your financial assumptions will be projections that are consistent with the pro forma numbers.

Part 2 – Financial Assumptions

Estimated sales forecasts for next year by product or service line, along with the associated margin. List all major items in this section, not just products. For instance, you might include “Professional Services” as a separate item, with revenue and margin information.

List the number of employees needed to support this level of business, including yourself or key managers, along with your cost assumptions for compensation, equipment leasing (if applicable), professional services (accounting/legal/consultants), and other line items.

Part 3 – Projected Cash Flow Statement and Balance Sheet

List all key assumptions like: sources and uses of cash, capital expenditures, Planned and Unplanned D&A (depreciation & amortization), changes in operating assets and liabilities, along with those for investing activities. For example, you might list the assumptions as follows:

• Increases in accounts receivable from customers based on assumed sales levels
• Decreases in inventory due to increased sales
• Increases in accounts payable due to higher expenses for the year
• Decrease in unearned revenue as evidenced by billings received compared with those projected (if there is no change, enter 0)
• Increase/decrease in other current assets due to changes in business conditions
• Increase/decrease in other current liabilities due to changes in business conditions
• Increases in long term debt (if necessary)
• Cash acquired from financing activities (interest expense, dividends paid, etc.)

You make many of these assumptions based on your own experience. It is also helpful to look at the numbers for public companies and use those as a benchmark.

Part 4 – Future Financials

This section is for more aggressive financial projections that can be part of your plan, but which you cannot necessarily prove at the present time. This could include:

• A projection of earnings per share (EPS) using the assumptions above and additional information such as new products, new customer acquisition, expansion into new markets
• New product lines or services to be added in the second year. List the projected amount of revenue and margin associated with these items
• A change in your gross margins due to a specific initiative you are planning, such as moving from a high volume/low margin business to a low volume/high margin business

Part 5 – Calculations

Calculate all critical financial numbers like:

• Cash flow from operating activities (CFO)
• Operating income or loss (EBITDA)  (earnings before interest, taxes, depreciation, and amortization)
• EBITDA margin (gross profits divided by revenue less cost of goods sold)
• Adjusted EBITDA (CFO plus other cash changes like capital expenditure, deferred taxes, non-cash stock compensation, and other items)
• Net income or loss before tax  (EBT)
• Cash from financing activities (increase/decrease in debt and equity)

Part 6 – Sensitivity Analysis

If your assumptions are reasonably accurate, you will have a column for “base case” and a column for “worst case.”  If you have a lot of variables with different possible outcomes, just list the potential range in one cell.

Calculate both EBITDA margins and EPS ranges at each level.

Part 7 – Section Highlights

Just list the two or three key points you want to make. If it is hard to distill them down, you need to go back and work on Part 3 until it makes sense.

Part 8 – Financial Summary

Include all the key numbers from your assumptions, section highlights, and calculations. In one place, you can add up CFO, EPS at different levels, and EBITDA margins under both base case and worst-case scenarios to give a complete range for each assumption.

The key to a successful business plan is being able to clearly communicate your financial assumptions. Be sure to include your assumptions in the narrative of your plan so you can clearly explain why you are making them. If you are using the business plan for financing or other purposes, it may also be helpful to include a separate “financials” section so people unfamiliar with your industry can quickly find and understand key information.

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Other Resources for Writing Your Business Plan

• How to Write an Executive Summary
• How to Expertly Write the Company Description in Your Business Plan
• How to Write the Market Analysis Section of a Business Plan
• The Customer Analysis Section of Your Business Plan
• Completing the Competitive Analysis Section of Your Business Plan
• How to Write the Management Team Section of a Business Plan + Examples
• How to Create Financial Projections for Your Business Plan
• Everything You Need to Know about the Business Plan Appendix
• Business Plan Conclusion: Summary & Recap

Other Helpful Business Plan Articles & Templates

What Are the Key Assumptions of a Business Plan?

• Small Business
• Business Planning & Strategy
• Business Plans
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How to Write a Business Plan for a Food Truck Business

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• How to Counter the Argument From a Potential Investor That Most Small Businesses Fail
• 6 Types of Business Plans

Entrepreneurs often make two basic assumptions about a new business: that they have a product consumers will want and that the business owner can make and sell the product profitably. An investor or partner will want to see that you’ve done you’re homework and can support more key assumptions than those two, with research and data.

Product or Service Need

One of the first and most important assumptions to address in a business plan is that there is a demonstrated need for your product or service in the marketplace. You can do this with a competition analysis, showing that others are making this product or offering this service and selling it profitably. If you believe you have a new idea no one has tried yet, demonstrate that there’s a need or desire for the benefit you offer, which can include showing how other companies currently address this consumer need, but not as well as your new idea will.

Sufficient Customer Base

Another key assumption is that enough consumers want your product or service that you can generate adequate sales to make a profit for the long run. You will need to demonstrate that there are many more people in your target market than you need, because all of them won’t buy, and many will buy from competitors.

There is no specific formula businesses use to calculate this number, but your excess potential customer base should be more than just a percentage of your sales need. For example, if you need 100 people to buy from you each day, don’t plan on surviving in an area with 120 or 130 potential customers. Plan on needing an exponential number, which might be five to 10 times the number of customers you need.

Research to Demonstrate Profitability

Every entrepreneur assumes he will be profitable, but that assumption must be borne out by market research, budgeting and sales projections. Profitability does not depend only on sales – it centers around your cost to make and sell your product.

Once you have calculated your manufacturing and overhead costs, review the various price levels at which you might sell your product to determine if you can pay off your start-up costs, then start making a profit. You can choose a pricing strategy that generates high sales volumes by selling at a low price or by trying to maximize profit margins with a higher price.

Management Expertise and Experience

A product doesn’t make itself, and a company doesn’t run itself. One of the key assumptions of a business plan is that the principals can run a business profitably. The creator of a widget might make the best widget the marketplace has ever seen, but that doesn’t mean she knows how to organize a company, handle accounting, create marketing strategies, develop budgets, handle legal issues, prepare taxes and perform the many tasks required to operate a business. A business plan should demonstrate that the principals not only know how to make a product or deliver a service, but also will be able to manage all aspects of the business.

Adequate Funding and Capitalization

Even when a business starts making a profit from operations, it might still take months or years to pay off the initial start-up costs. Many small businesses fail because the owner believes he can fund the operations on sales. Sales volumes that will be more than adequate for making a profit in year two or three might not even be close to helping you meet your debt service obligations your first year. Demonstrate in a business plan that you have sufficient capitalization to run the business until break-even and afterward, or provide the amount of investment or loan you’ll need to start the business.

• Small Business Administration: Essential Elements of a Good Business Plan for Growing Companies
• FindLaw: Contents of a Written Business Plan

Sam Ashe-Edmunds has been writing and lecturing for decades. He has worked in the corporate and nonprofit arenas as a C-Suite executive, serving on several nonprofit boards. He is an internationally traveled sport science writer and lecturer. He has been published in print publications such as Entrepreneur, Tennis, SI for Kids, Chicago Tribune, Sacramento Bee, and on websites such Smart-Healthy-Living.net, SmartyCents and Youthletic. Edmunds has a bachelor's degree in journalism.

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List Business Plan Assumptions

Identify and list business plan assumptions. You will get real business benefits from the assumptions list in your business plan. Planning is about managing change, and in today’s world, change happens very fast. Assumptions solve the dilemma about managing consistency over time, without banging your head against a brick wall.

Assumptions might be different for each company. There is no set list. What’s best is to think about those assumptions as you build your twin action plans.

If you can, highlight product-related and marketing-related assumptions. Keep them in separate groups or separate lists.

You will use your business plan assumptions often

The key here is to be able to identify and distinguish, later (during your regular reviews and revisions, in Section 3), between changed assumptions and the difference between planned and actual performance. You don’t truly build accountability into a planning process until you have a good list of assumptions that might change.

Some of these business plan assumptions assumptions go into a table, with numbers, if you want. For example, you might have a table with interest rates if you’re paying off debt, or tax rates, and so on.

Many assumptions deserve special attention. Have a bullet point list. Maybe in slides. Maybe just a simple list. Keep them on top of your mind, where they’ll come up quickly at review meetings.

Maybe you’re assuming starting dates of one project or another, and these affect other projects. Contingencies pile up. Maybe you’re assuming product release, or seeking a liquor license, or finding a location, or winning the dealership, or choosing a partner, or finding the missing link on the team.

Maybe you’re assuming some technology coming on line at a certain time. You’re probably assuming some factors in your sales forecast, or your expense budget; if they change, note it, and deal with them as changed assumptions. You may be assuming something about competition. How long do you have before the competition does something unexpected? Do you have that on your assumptions list?

An Assumptions Example

The illustration below shows the simple assumptions in the bicycle shop sample business plan.

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Tim berry on business planning, starting and growing your business, and having a life in the meantime., the value of business plan assumptions.

Identifying assumptions is extremely important for getting real business benefits from your business planning. Planning is about managing change, and in today’s world, change happens very fast. Assumptions solve the dilemma about managing consistency over time, without banging your head against a brick wall.

Assumptions might be different for each company. There is no set list. What’s best is to think about those assumptions as you build your twin action plans.

If you can, highlight product-related and marketing-related assumptions. Keep them in separate groups or separate lists.

The key here is to be able to identify and distinguish, later (during your regular reviews and revisions, in Section 3), between changed assumptions and the difference between planned and actual performance. You don’t truly build accountability into a planning process until you have a good list of assumptions that might change.

Some of these assumptions go into a table, with numbers, if you want. For example, you might have a table with interest rates if you’re paying off debt, or tax rates, and so on.

Many assumptions deserve special attention. Maybe in bullet points. Maybe in slides. Maybe just a simple list. Keep them on top of your mind, where they’ll come up quickly at review meetings.

Maybe you’re assuming starting dates of one project or another, and these affect other projects. Contingencies pile up. Maybe you’re assuming product release, or seeking a liquor license, or finding a location, or winning the dealership, or choosing a partner, or finding the missing link on the team.

Maybe you’re assuming some technology coming on line at a certain time. You’re probably assuming some factors in your sales forecast, or your expense budget; if they change, note it, and deal with them as changed assumptions. You may be assuming something about competition. How long do you have before the competition does something unexpected? Do you have that on your assumptions list?

The illustration below shows the simple assumptions in a bicycle shop sample business plan.

Sample List of Assumptions

Thanks for the good read, Tim. This will be helpful to small businesses to minimize and manage future risks.

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