Bar profit and operating margin calculator
See how much of a trading period’s revenue remains after the costs you enter. Separate ingredient contribution from an operating result before deciding a busy bar is a profitable one.
How do I calculate a bar’s operating margin?
Subtract ingredient cost of sales, labour and other operating costs from revenue, then divide the remainder by revenue and multiply by 100. With £20,000 revenue and £16,000 of entered costs, the operating surplus is £4,000 and the margin is 20%.
| Measure | Formula | Example |
|---|---|---|
| Ingredient contribution | Revenue − ingredient cost | £15,000 |
| Operating surplus | Revenue − ingredients − labour − other costs | £4,000 |
| Operating margin | Operating surplus ÷ revenue × 100 | 20% |
Which costs should I enter?
Use one accounting period, currency and consistent tax basis. Ingredient cost of sales is the cost of stock consumed in that period; purchases alone can mislead when stock levels change. Labour should include the employment costs included in your own management accounts. Other operating costs can include rent, utilities, insurance, payment fees and depreciation where your accounting policy includes it.
Do not count a cost in two boxes. This is a transparent planning calculation from your inputs, not a replacement for your accounts. Financing costs, tax, owner drawings and capital spending are not automatically included. The output is not a claim of audited net profit.
What if the bar makes a loss?
Costs above revenue produce a negative result. For example, £10,000 revenue against £12,000 costs produces a £2,000 loss and a −20% operating margin. Zero revenue does not have a defined percentage margin, so the calculator requires positive revenue.
How can I compare scenarios fairly?
Start with the recorded period, then change one assumption at a time. Test whether extra serves also need extra labour, stock and card fees. A sales increase does not flow directly into profit. Label estimates as scenarios and compare the next actual period with the same cost definitions.
Read next
Use the pour-cost calculator for recipes and the weekly sales review for trading decisions. Explore Better Bartender for bars.