How to Create a Financial Forecast for Small Businesses

Hands Of Business Workers Looking At Plans

Arianna Colomb Last updated: 18 February 2026 minute read

Jump to a section

A financial forecast predicts future performance using historical data and market trends. It usually includes a 12-month cash flow forecast and a projected Profit and Loss (P&L) statement, helping business owners plan for hiring, expansion, or potential cash shortages.

Key terms glossary

When building or discussing your forecast with advisors and lenders, you will likely encounter these three specific terms.

Burn rate: The amount of money your business spends each month before it starts making a profit.
Runway: How many months your business can keep operating before it runs out of cash.
Variance analysis: Comparing your actual financial results to your forecast to see where and why they differ.

What is financial forecasting?

Financial forecasting is the process of predicting your future sales, expenses, and resulting profits. You do this by looking at your past numbers (historical data) and estimating how those patterns will continue.

Unlike a budget, which is a plan of how you want to spend your money, a forecast is a realistic prediction of what will actually happen. Accurate yearly and monthly projections allow you to manage cash flow, set targets, and spot risks before they become problems.

Cash flow forecast vs. profit and loss projection

It is common to confuse these two, but they track different things. You need both to get the full picture:

Profit and Loss (P&L) projection: This tracks your income and expenses to see if you are making a profit on paper. It includes non-cash items like depreciation.
Cash flow forecast: This tracks the actual cash entering and leaving your bank account. It is the most critical tool for small businesses because you can be "profitable" on paper but still go bust if you don't have enough cash to pay your rent today.

Why you need a financial forecast

Every small business needs a forecast to assess and maintain their financial wellbeing. It serves three main purposes:

Strategic decision making: It helps you decide if you can afford to hire new staff, buy equipment, or move into a bigger office.
Risk management: It identifies potential cash gaps months in advance, giving you time to arrange a line of credit or cut costs.
Securing funding: Lenders and investors will almost always require a 12-month projection to see if your business is a safe bet for a loan.

5 steps to create a 12-month financial forecast

1. Gather historical data

Collect your last 2–3 years of bank statements and tax returns.

Identify patterns: Look for trends, such as material costs rising by 10% annually or seasonal sales spikes.
Define your baseline: Use these past numbers to create a realistic starting point for your future estimates.

2. Forecast your sales

Predict your monthly revenue by considering what might grow or shrink your sales over the next year.

Consider external factors: Account for the general economy, upcoming marketing campaigns, or the launch of new products.
Choose a method: Keep it simple by using a sales pipeline tracker or by averaging your growth from previous years.

3. Project your expenses

List everything it costs to run your business, divided into two categories:

Fixed expenses: Consistent monthly costs like rent, insurance, salaries, and software subscriptions.
Variable expenses: Costs that change based on your usage or sales volume, like materials, utilities, and marketing spend.

To ensure your forecast remains realistic, you should factor in potential inflation, such as a 4% rent increase at your next renewal. It is also helpful to model "best case" and "worst case" scenarios for unpredictable costs—like a sudden supplier price hike—to help you understand your potential profit margins.

4. Build your cash flow model

This is the make-or-break step. Project exactly when money enters and leaves your bank account month-by-month.

Identify timing gaps: Look for periods where outflows are higher than inflows.
Prepare for shortfalls: Plan to have an emergency fund or a line of credit ready to cover these gaps. Tools like the Capital on Tap Business Credit Card can help maintain steady operations by offering credit limits up to £250,000 and up to 42 days interest-free on business purchases.

5. Review and adjust

A forecast is a living document. Once the year begins, you must compare your actual results against what you modelled to stay nimble.

Schedule regular reviews: Set monthly and quarterly reminders to review your metrics.
Analyse the gaps: If actual sales lag behind your estimate, dig into the reason. Did a specific assumption prove wrong? Has the market changed?
Fine-tune the model: Tweak your forecast and budgets based on these real-world learnings.
Reissue and realign: Send updated forecasts to your stakeholders whenever major changes occur.

Continually updating your forecast based on reality ensures you are steering your business with the most accurate information possible, rather than relying on outdated guesses.

Using "What-If" scenarios for strategy planning

The best forecasts include "What-If" scenarios to anticipate risks. Ask yourself:

What if my main supplier raises prices by 10%?
What if sales are 20% lower than my average case?
What if a major client delays payment by 60 days?

By modelling these risks now, you can prepare contingency funds or response plans.

Communicating the forecast to stakeholders

Financial forecasts are only useful if they guide strategic decisions. To keep your team, investors, and lenders aligned, you must communicate your projections clearly and frequently.

When sharing your numbers through reports, dashboards, or meetings, focus on these five areas:

Highlight key indicators: Summarise the most important data, such as sales growth rates, expense targets, and your expected cash position.
Explain your assumptions: Discuss the "why" behind the numbers, such as an upcoming product launch or a planned marketing push.
Share the risks: Be transparent about "best case" and "worst case" scenarios so stakeholders aren't surprised by fluctuations.
Connect to objectives: Relate the forecast back to your business goals. Show how the projected finances are influencing your current decisions.
Encourage scrutiny: Create space for Q&A. Getting feedback from advisors or staff can help you spot errors and improve your financial models.

The bottom line

A financial forecast is one of the most powerful tools in a small business owner's arsenal. While it requires an investment of time upfront, it replaces stressful guesswork with a clear, data-driven strategy. By mapping out your sales and expenses 12 months in advance, you can spot trends early, prepare for seasonal dips, and move from reacting to problems to actively planning for growth.