The formula with inventory, benchmarks by concept, plate costing and menu engineering, and the fixes that bring food cost down in payback order.
By Rob Bruni, founder of OpsEdge Hospitality, twenty years running restaurants, bars, clubs and resorts. Updated November 2026.
Free printable: Food Cost Leak Audit (PDF)
Food cost percentage is what you spent on food divided by what you sold it for. It is the number most restaurant owners quote and the one most often calculated wrong, because it gets done from invoices alone. This guide covers the real formula (with inventory), the benchmarks by concept, how to cost a plate, and the fixes that move the number, in the order they pay back.
Food cost percentage tells you how many cents of every food sales dollar went to ingredients. A 32 percent food cost means 32 cents of each dollar bought the food on the plate and the other 68 cents is left to cover labor, rent and profit.
It is one half of cost of goods sold (beverage is the other) and one third of prime cost. On its own it is a useful number. Next to your menu prices and your sales mix it becomes a control, because it tells you which items are earning their place.
The part in brackets is cost of food used, or food COGS. It is not the same as purchases. If you bought $14,000 of food this week but your walk-in has $2,000 more in it than it did last Monday, you used $12,000. If the walk-in has $2,000 less, you used $16,000. Purchases alone are only right when inventory does not change, which is almost never.
Measure food cost against food sales, not total sales. A restaurant with a strong bar can show a 24 percent food cost against total sales and a 33 percent food cost against food sales. The second number is the one that tells you whether the kitchen is in control.
Invoices tell you what arrived. Inventory tells you what is left. The difference is what you used, and what you used includes waste, theft, over-portioning and the case of chicken that went out of date in the back of the walk-in. None of that shows up on an invoice.
A weekly count of the 40 to 60 items that make up 80 percent of your food spend takes about an hour and gets you a food cost you can act on. A full count monthly keeps the books honest. Operations that count only monthly find out about a bad week three weeks late, which is the whole month.
| Concept | Food cost (of food sales) | Notes |
|---|---|---|
| Quick service / fast casual | 28 to 32% | High volume, tight menus, limited waste |
| Full service restaurant | 28 to 34% | Depends heavily on protein mix |
| Bar or beverage-led | 28 to 34% | Food is a smaller share of sales, so the percent can run higher without hurting prime cost |
| Fine dining / private club | 30 to 36% | Premium ingredients, member pricing in clubs |
| Pizza | 20 to 28% | Low-cost base ingredients |
| Steakhouse | 35 to 40% | High protein cost, offset by check average |
A benchmark is a starting point. Your own trend, week over week, is the number that matters. A steakhouse that holds 37 percent steadily is in better shape than a cafe that swings between 26 and 36.
A full service restaurant, one week
Food sales: $36,000 (of $48,000 total sales)
Beginning food inventory (Monday): $9,800
Food purchases this week: $13,100
Ending food inventory (next Monday): $10,500
Cost of food used: $9,800 + $13,100 − $10,500 = $12,400
Food cost: $12,400 ÷ $36,000 = 34.4%
Against total sales the same week it would read 25.8%, which looks fine and hides a problem.
At 34.4 percent this restaurant is at the top of its band. If the target is 31 percent, the gap is $1,220 a week, about $63,000 a year. The next question is whether the gap is in pricing, portioning or waste, and the only way to answer it is item by item.
Overall food cost is the result of every plate you sell. To manage it you need two things per item: what it costs to make and how many you sell.
Cost your top 20 sellers first, they usually make up more than half of food sales. Use current invoice prices, not the prices from when the menu was written. Then put each item on a simple grid: high or low margin, high or low popularity.
This is menu engineering, and it is the single highest-return food cost exercise there is because it changes what you sell, not just what you spend.
Two to three points in a quarter is a normal result for an operation that has not been counting. Our Playbooks and Toolkits include the food cost calculator, menu engineering matrix and inventory sheets we use, and the Prime Cost System page covers the help available when you want the first pass done with you.
The free food cost calculator turns an inventory count and a period of purchases into your food cost percent, shows the gap to target in dollars a year, and checks any plate against its menu price. No signup.
Open the food cost calculator Run your prime costFree printable
Twenty-four places food cost leaks, from the dock to the dish pit, with an OK or FIX box for each. Walk it once a month. Two printable pages.
Here it is. We also sent a confirmation to your inbox.
Download the PDFMost full service restaurants aim for 28 to 34 percent of food sales. Quick service runs 28 to 32 percent, pizza 20 to 28 percent, and steakhouses 35 to 40 percent. Fine dining and private clubs often run 30 to 36 percent. The trend week to week matters more than any single number.
Take beginning inventory, add purchases, subtract ending inventory to get cost of food used. Divide that by food sales for the same period and multiply by 100. Using purchases alone without inventory gives a number that is wrong whenever stock levels change, which is most weeks.
Food sales. Measuring against total sales lets strong bar sales hide a kitchen problem. Prime cost, which combines food, beverage and labor, is the number measured against total sales.
A weekly count of the 40 to 60 items that make up most of your spend, and a full count monthly. Monthly-only counts mean a bad week is discovered three weeks late.
Count weekly, re-cost and reprice the top 20 sellers against current invoices, put portion specs and scales on the line, and order to pars. Most operations that have not been counting recover two to three points in a quarter.
Plate cost is the total ingredient cost of one menu item, including every component, garnish, side and the oil and seasoning used to cook it, at current invoice prices. Divided by the menu price it gives the item's food cost percent.
