Without the right data, financial forecasting can be a shot in the dark.
Financial analysts weigh a large number of inputs with different probabilities to arrive at a number within an expected range. If financial forecasting is tough for the professionals, it may appear overwhelming for the entrepreneur.
Fortunately, you don’t have to be an expert in financial modeling to create a financial forecast. In this article, we’ll show you a few different types and methods of financial forecasting you can do entirely on your own.
What is a financial forecast?
A financial forecast is a financial projection that attempts to predict what a business’s money situation will look like in the future. It takes spending, revenue, cash, and sales into account to make an educated prediction based on current and historical data. With a few of the right inputs, you can build a financial forecast that lets you:
Get a better understanding of your company's cash flow needs
Attract investors by ensuring the future financial health of your business
Answer business planning questions like, "Can I afford to hire someone or invest in new equipment next quarter?" or "Will I have enough cash to cover our slow season?"
Spot potential liquidity shortfalls early enough to line up financing or build contingency plans before they become a problem
It’s important not to confuse a financial forecast with a financial plan. A financial forecast answers "What do we expect to happen?" while a financial plan answers, "What do we want to happen, and how will we get there?" A financial plan is a broader, strategic document that includes goals (growth targets, funding needs, major investments), the forecast itself, and the actions/strategy needed to hit those goals.
Types of financial forecasts
There’s no one-size-fits all financial forecast, and in fact, many of the types of forecasting can work together to provide a fuller picture of the future of your business. If you’re in charge of financial forecasting, you might complete any of the following:
A cash flow forecast (or cash flow projection) predicts cash inflows and outflows for your business over time, including what you'll earn along with when you'll actually receive and spend it. It's essentially a forward-looking version of your cash flow statement, one of the three core financial statements.
A sales forecast is a type of revenue forecasting that predicts how much revenue you'll bring in over a given period, based on past sales, market trends, and any planned changes like new products or pricing that could impact revenue streams. It's often the starting point for other forecasts, since most other numbers (expenses, staffing, inventory) depend on how much you expect to sell.
An expense forecast predicts your expected costs over a period, including fixed costs like rent and salaries and variable costs like cost of goods sold (COGS) or seasonal expenses. It's a natural counterpart to the sales forecast (revenue in vs. costs out), and the two often feed directly into your budget forecast.
A budget forecast combines your expected revenue and planned expenses to project whether you'll be over or under budget for a period. It's used to check your actual spending against your original budget and adjust course if costs are running higher (or lower) than planned.
A short-term forecast covers a shorter window (typically the next month to a year). It's useful for day-to-day decisions like managing cash flow, ordering inventory, or planning staffing, and tends to be more detailed and frequently updated than longer-range forecasts.
A long-term forecast looks further ahead, usually one to five years, to support bigger-picture decisions like expansion, major purchases, or seeking a loan or investment. It's less detailed and more assumption-driven than a short-term forecast, since there's more uncertainty the further out you go.
Types of forecasting techniques
You can approach financial forecasting in a number of ways. Take a look at the distinctions below to get a feel for what’s best for your business.
Top-down vs. bottom-up forecasting
A top-down forecast estimates your company's growth based on its share of a market. The assumption is that, given the existing and potential market size, your company can expect to capture a growing percentage of that market each year until it reaches the total addressable market (TAM).
While you want to be optimistic in your projections—enough so as to be interesting to investors—you should not be unrealistic about your potential growth. Entrepreneurs tend to be way too optimistic with their forecasting. Grounding your numbers in facts builds credibility with investors and lenders.
Conversely, a bottom-up forecast is a detailed budget that breaks out spending plans by department. Hiring plans and operating expenses are calculated based on your expected growth. Potential revenue is calculated by multiplying the number of potential sales per product by the average sale value. This is a more strategic approach wherein you take a real look at your current situation and capabilities and see where you can reasonably expect to go from here.
Using this approach, revenue projections can substantially shrink. Instead of looking at the market and its potential, you need to look at your own market (for example, your existing customers) and map out how you can parlay your current standing into new sales.
Because you’re looking at real numbers and your real situation, it’s much harder to get huge projections with bottom-up forecasting. With this approach, the only way to grow your numbers is to increase your overall exposure. That's why staying diligent about your forecasting matters as your company grows.
Qualitative vs. quantitative methods
Qualitative forecasting relies on judgment, experience, and outside knowledge rather than hard numbers to make projections. This method is useful when you don't have much historical data to work with, like when you're launching a new product or just starting out. Qualitative forecasts might rely on expert opinions, market research, industry benchmarks, or customer surveys.
Quantitative forecasting uses historical data and math to project what's likely to happen next. It works best when you have consistent historical financial data to draw from, like several months or years of sales figures. Common techniques include straight-line and regression analysis (more on those below).
Many small businesses use a mix of both: quantitative methods to ground the forecast in real numbers, and qualitative input to account for things data can't capture, like a new competitor entering your market or a shift in customer behavior.
Straight line vs. regression analysis
Straight-line forecasting is the simplest quantitative method. It assumes future growth will continue at the same steady rate as the past, taking a historical growth rate (like 5% year-over-year) and applying it forward. It's a quick and easy method, which makes it a good starting point. However, it doesn't account for seasonality, market shifts, or other variables.
Regression analysis is more advanced. It looks at the relationship between your revenue and one or more variables, like marketing spend, foot traffic, or seasonality, to predict future outcomes based on those factors. It takes more data and effort to set up, but it produces a more nuanced forecast, since it accounts for what's actually driving your numbers rather than just assuming a flat trend.
Always be forecasting
Forecasting isn’t a one-and-done activity. Once the sales start rolling in, you’ll need to prepare forecasts on a monthly basis to help you manage your cash reserves and plan for growth. Over a third of small businesses sought outside financing in 2024, and most of it went toward closing cash flow gaps rather than funding expansion. This is why it’s important to make sure you are diligent in how you forecast your company’s growth. We may not all be financial pros, but now we can forecast like one.
FAQs
How accurate does a financial forecast need to be for a small business?
A financial forecast isn’t meant to predict the future perfectly, so it doesn't need to be exact to be useful. Small businesses should aim for a reasonable range based on solid assumptions and historical data, then compare actual results against the forecast regularly and adjust future projections accordingly.
How often should you update a financial forecast?
Most small businesses should review and update their financial forecast at least monthly, since cash flow and expenses can shift quickly. Longer-term forecasts (covering one to five years) are typically revisited quarterly or after major events, like a new product launch, funding round, or unexpected market shift.
Do I need special software to create a financial forecast?
No. A spreadsheet is often enough to build a basic financial forecast, especially for straight-line projections or simple cash flow tracking. As a business grows or needs more advanced techniques like regression analysis, dedicated forecasting or accounting software can save time and reduce manual errors.
What's the difference between a cash flow forecast and a cash flow statement?
A cash flow statement reports what already happened—the actual cash that moved in and out of your business over a past period. A cash flow forecast is forward-looking: it predicts future cash inflows and outflows based on historical data and expected changes, helping you plan ahead.
Can a financial forecast help me get a small business loan?
Yes, lenders often want to see a financial forecast as part of a loan application, since it shows you understand your business's cash needs and repayment ability. A well-supported forecast, grounded in realistic assumptions and historical data, can strengthen your credibility and improve your approval odds. Four in five businesses launched in 2024 needed outside financing to get off the ground, and nearly 40% of that money went straight to payroll. A credible forecast is often what stands between getting that funding and not.
