What Is Financial Forecasting?

Accounting Wise - what is financial forecasting

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Financial forecasting is the process of estimating a business’s future financial performance based on historical data, current market conditions, and anticipated trends. For UK companies, especially small and medium-sized enterprises (SMEs), financial forecasting is not just a helpful tool it’s essential for strategic planning, budgeting, and long-term growth.

In this post, we will go someway to explain what financial forecasting involves, the different types of forecasting methods, and how it can benefit your business in the 2025/26 financial year and beyond.

Why Is Financial Forecasting Important?

Financial forecasting helps businesses:

  • Plan for growth
  • Anticipate cash flow needs
  • Set realistic budgets
  • Manage investor expectations
  • Make informed decisions about staffing, pricing, and investments

In today’s volatile economy, having a forward-looking financial strategy allows UK businesses to stay agile and avoid surprises. With tools like Making Tax Digital (MTD) continuing to shape financial compliance, forecasting also supports proactive tax planning.

Key Components of a Financial Forecast

A comprehensive financial forecast typically includes:

  1. Revenue Forecast – Estimating future sales based on current pipeline, historical trends, and seasonality.
  2. Expense Forecast – Projecting fixed and variable costs (e.g., rent, salaries, utilities, marketing).
  3. Cash Flow Forecast – Anticipating when money will come in and go out to manage liquidity.
  4. Profit & Loss Forecast – Estimating net income by subtracting projected costs from revenues.
  5. Balance Sheet Forecast – Predicting the future position of assets, liabilities and equity.

Types of Financial Forecasting

Short-Term Forecasting

Typically covering a 3–12 month period, this type is useful for managing working capital, meeting payroll, and ensuring bills are paid on time. It is particularly important for new businesses or those with seasonal trading patterns.

Medium-Term Forecasting

Often used for annual budgeting or planning for a financial year (such as the UK tax year: 6 April 2025 to 5 April 2026). This forecast supports performance monitoring and resource allocation.

Long-Term Forecasting

Covers 3-5 years or more. Useful for strategic decisions such as expanding operations, applying for funding, or acquiring new assets.

Common Forecasting Methods

Historical Trend Analysis

Uses past financial data to identify patterns and predict future results. Ideal for stable businesses with consistent income and expenses.

Bottom-Up Forecasting

Starts at the unit or department level (e.g. product sales) and builds up to the overall financial picture. Common for startups and e-commerce businesses.

Top-Down Forecasting

Begins with market-level data or industry growth rates, then narrows down to the company’s potential share. Useful for high-growth sectors or when entering a new market.

Scenario Forecasting

Models different outcomes based on variables like inflation, interest rates, or supply chain changes. Ideal for stress testing or planning for uncertainty.

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Benefits of Financial Forecasting for UK Businesses

  • Avoid Cash Flow Crises
    Forecasting allows you to spot cash shortfalls in advance and take action (e.g., securing funding or cutting costs).
  • Improve Decision-Making
    Whether it’s hiring a new employee or investing in equipment, financial forecasts provide the numbers to back your decision.
  • Enhance Budget Accuracy
    Forecasts give you a benchmark for your budget and help track performance in real time.
  • Support Funding Applications
    Lenders and investors will expect detailed forecasts as part of your business plan.
  • Tax Planning & Compliance
    Accurate forecasting allows you to plan for Corporation Tax, VAT, and other liabilities across the 2025/26 tax year.

Forecasting Tools and Software

Some recommended tools for UK businesses include:

  • The Balance App – Simple forecasting, invoicing, and tax tools tailored for small businesses and sole traders.
  • FreeAgent – MTD-compatible software with forecasting reports.
  • Xero – Offers cash flow forecasting through integrations like Float or Futrli.
  • QuickBooks Online – Includes profit forecasting and budget features.
  • Excel/Google Sheets – Ideal for custom models if you’re confident with formulas.

For more forecasting tools, check out GOV.UK’s business finance support for grants and planning advice.

Financial Forecasting and Making Tax Digital (MTD)

With the UK government rolling out Making Tax Digital for Income Tax Self Assessment (MTD for ITSA) from April 2026, digital financial records and forecasts will become even more valuable.

If you’re self-employed or run a business with turnover over £50,000, you’ll need to submit quarterly digital updates to HMRC. Financial forecasting can help ensure that you:

  • Avoid surprise tax bills
  • Plan for quarterly payments
  • Keep your business MTD-compliant

Learn more about MTD requirements at GOV.UK – Making Tax Digital.

Tips for Better Financial Forecasting

Creating accurate financial forecasts isn’t just about predicting numbers—it’s about preparing your business for growth, investment, and unexpected challenges. Whether you’re just starting out or scaling an established company, here are practical tips to sharpen your forecasting strategy.

1. Review Forecasts Regularly

Tip: Don’t set and forget your forecast. Schedule monthly or quarterly reviews to keep it aligned with your actual financial performance.
Why it matters: Markets shift, costs change, and opportunities arise. Regular reviews let you adapt faster.

2. Use Rolling Forecasts

Tip: Extend your forecast every month rather than working towards a fixed year-end goal. This approach improves agility and makes it easier to pivot.
Example: If you’re 6 months into the year, forecast the next 12 months, not just to December.

3. Factor in Seasonality

Tip: Look at past sales data to spot seasonal trends. Plan for slow periods (like post-Christmas slumps) and busy times (like summer spikes).
Why it matters: It helps with cash flow planning, staffing, and inventory control.

4. Separate Fixed and Variable Costs

Tip: Fixed costs (e.g. rent, salaries) remain stable. Variable costs (e.g. stock, shipping) grow with sales. Forecast them separately to understand how profits scale.
Bonus tip: Use a spreadsheet or accounting software to tag each expense type clearly.

Tool tip: The Balance App helps visualise cost categories and trends.

5. Include ‘What-If’ Scenarios

Tip: Build three versions of your forecast:

  • Best case – higher-than-expected sales
  • Base case – expected outcomes
  • Worst case – cost increases or revenue drops
    This stress-tests your business model and helps with risk management.

When Should You Start Forecasting?

New businesses

Start from day one. A financial forecast is a core part of any robust business plan and will be essential if you’re seeking funding or a startup loan.

Existing businesses

Start now  especially before:

  • A new financial year
  • Hiring staff
  • Launching new products
  • Seeking investment

Forecasting isn’t a luxury it’s a necessity for informed decision-making.

Final Tips for Smarter Forecasting

  • Use cloud-based accounting tools – They auto-sync with your accounts for real-time data.
  • Consult your accountant – They can stress-test assumptions and spot red flags.
  • Keep it simple – Focus on the key drivers of revenue and cost.
  • Review past data – Historical trends are your best guide.

How Accounting Wise Can Help

At Accounting Wise, we help UK businesses of all sizes develop clear, reliable financial forecasts to support smarter decisions. Whether you’re launching a new venture, scaling up, or looking to streamline cash flow management, we can help you:

  • Build accurate, actionable forecasts
  • Integrate forecasting into your bookkeeping and accounting
  • Stay compliant with HMRC and MTD rules
  • Align your forecasts with tax planning and budgeting

Visit a-wise.co.uk to learn more or get in touch for expert advice.

Financial forecasting is a crucial part of running a sustainable and successful business. By anticipating income, expenses, and cash flow needs, you gain the confidence and control to move your business forward—whatever 2025/26 brings.

If you want help getting started with your forecasts or aligning them with tax obligations, Accounting Wise is here to guide you.

Need help understanding your business finances? Get started today for expert advice on improving your profits.

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