What is the food cost percentage formula and how do you use it?
Part of the complete guide: QR Code Menu for Restaurants: The Complete 2026 Guide
The food cost percentage formula is food cost divided by food sales, multiplied by 100. Per dish, divide the cost of the ingredients in one portion by the menu price excluding VAT or sales tax. Per period, use opening stock plus purchases minus closing stock, divided by food sales excluding tax for the same period. Calculate both: the first prices your menu, the second shows what really happened.
- Per dish: portion cost ÷ menu price excluding tax × 100.
- Per period: (opening stock + purchases − closing stock) ÷ food sales excluding tax × 100.
- Always use prices without VAT or sales tax, or the result looks better than reality.
- Include yield: price ingredients per usable kilo, not per kilo bought.
- The gap between dish-level and period-level results is where your money leaks.
What is the food cost percentage formula?
Food cost percentage tells you how much of each unit of food revenue is spent on ingredients. The general formula is simple: food cost ÷ food sales × 100. What changes is the scope. You can apply it to a single dish, to a menu category or to your whole kitchen over a week or a month.
Both views are useful. The dish formula is a planning tool: it helps you set prices and spot plates that cost too much. The period formula is a control tool: it measures what you actually consumed, including waste, staff meals and mistakes. When the two disagree, you have something to investigate. Our guide on how to reduce food cost in a restaurant covers what to do once you see the gap.
| Version | Formula | Used for |
|---|---|---|
| Per dish | Portion cost ÷ menu price excl. tax × 100 | Pricing and recipe decisions |
| Per period | (Opening stock + purchases − closing stock) ÷ food sales excl. tax × 100 | Monthly control and P&L |
| Theoretical per period | Σ (recipe cost × items sold) ÷ food sales excl. tax × 100 | Comparison with actual usage |
How do you calculate food cost percentage per dish?
Start from a written recipe with exact quantities. Price each ingredient from your latest invoices, convert to the unit used in the recipe, then add everything up.
- List every ingredient in one portion, including garnish, sauce, oil and the side.
- Convert the purchase price to the recipe unit, for example price per kilo ÷ 1,000 = price per gram.
- Adjust for yield when the ingredient is trimmed, peeled, boned or cooked down.
- Add the ingredient costs to get the portion cost.
- Divide by the menu price excluding tax and multiply by 100.
| Illustrative pasta dish (example) | Quantity | Cost |
|---|---|---|
| Dry pasta at 2.00 USD/kg | 120 g | 0.24 USD |
| Tomato sauce (house recipe) | 150 ml | 0.90 USD |
| Parmesan at 24.00 USD/kg | 15 g | 0.36 USD |
| Basil and olive oil | — | 0.20 USD |
| Portion cost | 1.70 USD | |
| Menu price incl. 10% tax (example rate) | 11.00 USD | |
| Menu price excl. tax | 11.00 ÷ 1.10 | 10.00 USD |
| Food cost % | 1.70 ÷ 10.00 × 100 | 17.0% |
Do it in two minutes
Our free food cost calculator does this arithmetic for you: enter the ingredients and quantities, and it returns the cost per portion, the food cost %, the margin and a suggested menu price.
How do you calculate food cost percentage for a month?
The period formula measures what the kitchen really consumed. You need three numbers from your stock counts and invoices, plus your food sales excluding tax from the till for exactly the same dates.
| Illustrative month (example) | Amount |
|---|---|
| Opening stock (count on day 1) | 3,200 USD |
| + Food purchases during the month | 8,600 USD |
| − Closing stock (count on last day) | 2,900 USD |
| = Cost of food used | 8,900 USD |
| Food sales excl. tax | 29,500 USD |
| Food cost % | 8,900 ÷ 29,500 × 100 = 30.2% |
Adjustments that make the number honest
- Staff meals: if you record them separately, for example 300 USD in the month, you may take them out of food cost and book them as a staff benefit. In the example, 8,600 ÷ 29,500 gives 29.2%. Be consistent from month to month.
- Transfers: food moved to the bar (lemons, mint, cream) or from the bar to the kitchen should be recorded so each department carries its own cost.
- Drinks: calculate beverage cost separately from food cost; mixing them hides problems in both.
- Credit notes and returns to suppliers reduce purchases for the period.
Why must you use prices excluding VAT or sales tax?
Tax collected on a sale is not your revenue: you pass it on to the tax authority. If you divide the cost of a dish by the price the guest pays including tax, your food cost percentage looks lower than it really is. In the pasta example above, 1.70 ÷ 11.00 gives 15.5% instead of the correct 17.0%. Across a full menu, that error can make you believe your prices are comfortable when they are not.
Use the same rule for your purchases. If you recover input VAT on supplier invoices, use purchase prices excluding VAT. If you cannot recover it, the VAT you pay is part of your real cost. Ask your accountant which applies to your business.
What are the most common food cost formula mistakes?
- Using the price per kilo bought instead of per usable kilo. Example: chicken breast at 8.00 USD/kg with an 85% yield after trimming really costs 8.00 ÷ 0.85 = 9.41 USD per usable kg.
- Forgetting small items: oil, butter, salt, garnish, sauces, packaging for take-away. Together they can add a visible amount per plate.
- Keeping old prices in recipe costs months after suppliers raised them.
- Counting stock on different days or at different times, so periods do not match the sales report.
- Using total sales including drinks when you only measure food cost.
- Comparing your percentage with a number from another restaurant with a different concept instead of tracking your own trend.
There is no universal target
You will often see a single “ideal” percentage quoted online. Treat it with caution. Many operators set their own target range per category, based on their concept, prices and labour model, and then work on the trend. A high food cost dish can still be a good dish if it earns a strong margin per plate.
How do you turn the formula into prices and decisions?
Reverse the formula to get a cost-based price: portion cost ÷ target food cost %. With the pasta at 1.70 USD and an illustrative target of 25%, the price excluding tax would be 1.70 ÷ 0.25 = 6.80 USD. Then check it against competition and perceived value, and look at the cash margin per plate, not only the percentage. Our article on how to price menu items explains contribution margin and psychological pricing.
Finally, bring the monthly food cost into your restaurant profit and loss template so you see it next to labour, rent and other expenses.
- Cost every recipe once and update it when a key supplier price changes.
- Calculate the period food cost % every month on the same dates.
- Compare it with the theoretical cost from recipes × items sold.
- Investigate the biggest gaps first: portions, waste, unrecorded items.
- Review prices for dishes whose margin no longer fits your target.
Can a POS calculate food cost automatically?
Yes, if recipes are linked to sales. In the inventory and recipes module of the Dawwerni POS, each product has a recipe per size, variant and modifier option. When an order is paid, ingredients are deducted from stock; voids and refunds put them back. A weighted-average ingredient cost gives the cost and margin of each product and size in a “Costs & margins” view, and the profit and loss report uses the recipe cost captured at the time of sale. Ask the team which plan includes the module, or see the restaurant features.
FAQ
What is the basic food cost percentage formula?
Food cost divided by food sales, multiplied by 100. For one dish, use the portion cost and the menu price excluding tax. For a period, use opening stock plus purchases minus closing stock, divided by food sales excluding tax for the same dates.
Should food cost percentage include drinks?
Usually not. Most operators calculate food cost and beverage cost separately because the margins are very different. Mixing them can hide a problem in the kitchen behind good drink margins, or the reverse. Use the same split every month so results stay comparable.
Why is my monthly food cost higher than my recipe costs?
Because the monthly figure includes everything consumed: waste, over-portioning, staff meals, free items, theft and dishes that were never rung up. Recipe costs only show what should have been used. The difference is the amount to investigate.
How often should I recalculate dish costs?
Recalculate when a key ingredient price changes noticeably, when you change a recipe or portion, and at least every few months as a routine. Outdated recipe costs make the formula look accurate while the real margin quietly shrinks.
Does yield really change the food cost percentage?
Yes. If only part of what you buy reaches the plate after trimming, peeling or cooking, the usable kilo costs more than the invoice price. Divide the purchase price by the yield to get the real cost before you calculate the dish.
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