Food cost percentage: the most-tracked number in restaurants and what it actually tells you.

Food cost percentage is the share of your food revenue that goes back out the door as ingredient cost. If you sell €10.000 of food in a week and the recipes that produced those plates cost you €2.900 in ingredients, your food cost percentage is 29%. It is the cleanest, fastest signal of three things: are your menu prices set right, are your portions disciplined, and is your kitchen wasting food.

Definition

Food cost percentage measures ingredient cost as a proportion of the revenue those ingredients generated. The numerator is food COGS — the cost of food used in the period, not purchased. The denominator is food revenue only — beverage revenue and its separate beverage COGS get their own ratio (beverage cost typically runs 18-24%, much lower than food).

There are two ways to compute the numerator. Theoretical food cost uses recipe-driven costing: every plate sold contributes its recipe cost to COGS, summed across all sales. Actual food cost uses inventory-driven costing: opening inventory + purchases − closing inventory = food used. The gap between theoretical and actual is your variance — and that gap, if large and persistent, is waste, theft, or recipe drift.

The formula

Food cost % = Food COGS / Food Revenue × 100

Theoretical (recipe-driven):
  Food COGS = sum of (recipe cost × units sold) for the period

Actual (inventory-driven):
  Food COGS = Opening inventory + Purchases − Closing inventory

Variance = Actual − Theoretical (waste, theft, recipe drift)

For daily P&L purposes, theoretical (recipe-driven) is what you want. Inventory counts are too slow and too error-prone to drive same-day decisions. Run the theoretical number every day, then reconcile against actual at month-end via a full inventory count. nouz uses recipe-driven costing with snapshot pricing — every sale draws down its recipe cost at the price that was in effect on the day of the sale, so retroactive supplier price changes never distort historical margins.

Worked example

A neighbourhood bistro, Saturday lunch service.

Food revenue (net): €1.142,50. Food COGS: €337,40. Food cost percentage = 337,40 / 1.142,50 × 100 = 29,5%. Inside the 28-32% target band for a casual bistro. The burger at 30,4% is on the edge — worth checking against the next supplier price update. The fish at 31,8% is the highest contribution to the blended number, but the high ticket price means it is still a strong gross-margin contributor. See the menu pricing playbook for the full re-pricing sequence.

Benchmarks by concept

Higher than the top of your concept band for two weeks running means one of three things: prices set too low for current supplier costs, portions drifted larger than the recipe, or waste/spoilage running hot. The diagnostic order is always: re-cost three best-selling recipes against current supplier prices, then portion-audit those three dishes for a service, then look at the prep list and walk-in for waste. See food cost ratios benchmark for the full sector breakdown.

Why it matters

Food cost is roughly half of prime cost, and prime cost decides whether the kitchen is profitable. A two-point reduction in food cost percentage on a €500.000-food-revenue restaurant is €10.000 a year of EBIT — and unlike a price increase, it does not risk losing customers. The levers are: re-tender suppliers quarterly, portion-discipline weekly, and menu-engineer the three loss-leaders monthly. None of these need a consultant. They need the number on the screen every evening.

The operators who keep food cost in band check it daily against same-day sales. By the time month-end inventory says "food cost was 34% this month" the three weeks of drift that caused it are unrecoverable. Same-day, recipe-driven food cost is the operational metric. See the daily prime cost routine for the every-evening sequence.

Related concepts

• Prime cost (restaurant) — food cost plus labour, the combined controllable metric.
• Labour cost percentage — the other half of prime cost.
• Food cost ratios benchmark — full sector breakdown.
• Café menu pricing playbook — re-pricing sequence when food cost drifts.
• Daily prime cost for cafés — the every-evening routine.

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