How to prepare an annual budget for your business

Step 1: Start from realistic revenue

Base the revenue line on evidence — last year's actuals, pipeline, seasonality — not hope. An honest top line is the foundation; an inflated one makes the whole budget useless. Break it down by month to capture seasonal patterns.

Step 2: Build up your costs

List costs of sale that scale with revenue, then fixed overheads that do not. Include the lumpy items — tax, VAT, annual renewals — in the months they fall. Missing these is the classic budgeting error.

Step 3: Work down to profit

Revenue minus costs gives your budgeted operating profit, then account for interest, tax and any planned investment. This shows whether the plan actually makes money and how much you can reinvest.

Step 4: Link it to cash

A profitable budget can still hit cash troughs, so convert it into a cash-flow forecast to see the timing. This is where you spot months that need funding — and can arrange it in advance.

Step 5: Review against actuals

A budget only works if you compare it to reality each month in your management accounts, explain the variances, and adjust. That feedback loop is what turns a budget from a document into a steering wheel.

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