Annual restaurant budget: how to build it month by month

An annual budget is not meant to guess exactly what will happen, but to set a reference point against which to compare actual results, month by month. Without a budget, every variance is only discovered at year-end, when it is too late to correct.

Build the budget month by month, not just annually

Splitting the budget into twelve months, instead of dividing an annual total into equal twelfths, is what makes a budget genuinely useful. A restaurant has strong and weak months: comparing August against the annual average tells you nothing, comparing August against August's budget does.

1. Start from revenue for the same month last year, if available, as a baseline
2. Adjust for known events: planned closures, refurbishments, menu changes, already-decided price changes
3. Apply variable costs (food cost, part of labour cost) as a percentage of that month's expected revenue
4. Enter fixed costs (rent, base utilities, insurance) as the actual figure for that month, not an average

Accounting for seasonality

Seasonality is not just about revenue: costs vary too. In high season, food cost percentage can drop due to volume leverage, while labour cost can rise from overtime and extra shifts. A budget that applies the same food cost percentage to every month ignores this dynamic and creates systematic variances.

Calculating the break-even point

The break-even point is the monthly revenue level at which revenue exactly covers fixed and variable costs, with neither profit nor loss. It is calculated by dividing monthly fixed costs by the contribution margin percentage (100% minus the variable cost percentage of revenue).

Example: monthly fixed costs of €18,000, variable costs at 55% of revenue (45% contribution margin). Break-even is 18,000 / 0.45 = €40,000 in monthly revenue. Below this level the month runs at a loss, above it generates a margin.

Knowing the break-even point for every month, not just the year, lets you spot in advance which months are structurally at risk and need extra attention on variable costs and targeted promotions.

The quarterly review

A rigid annual budget, never revisited, loses usefulness within a few months if conditions change: supplier price increases, staffing changes, an unexpected event. A quarterly review does not mean rewriting the budget from scratch, but comparing actual and forecast results, understanding the main causes of variance, and updating the estimates for the following quarters based on what was observed.

• Compare actual revenue and costs against the budget month by month, not just at aggregate quarterly level
• Flag variances above 5-10% and find the specific cause before updating later estimates
• Update the budget for future quarters, but keep the original version to see how far reality drifted from the initial plan