How to Calculate Restaurant Food Cost Percentage

Published by MyBreakeven. Report a calculation or content issue to support@mybreakeven.com.

Published September 26, 2026 · Updated September 29, 2026

Calculate restaurant food cost percentage from inventory and purchases with a worked example. See how waste and changing sales affect the monthly result.

Restaurant · Financial Planning · Break-Even

Food cost percentage compares the cost of food used during a period with food sales from that same period. It is useful for checking waste, portion control and purchasing after the fact. It differs from the recipe cost of one dish, which helps set a menu price before the sale. Mixing those two measures can make a menu seem healthy while inventory is disappearing faster than planned.

Quick answer: Restaurant food cost percentage = (beginning food inventory + food purchases − ending food inventory) ÷ food sales × 100. If opening inventory is $8,000, purchases are $18,000, ending inventory is $6,000 and food sales are $60,000, food used is $20,000 and food cost percentage is 33.3%. Use the same dates and consistent inventory values.

The inventory formula and a complete example

Count the food inventory at the start and end of the same accounting period. Add purchases received during that period to starting inventory, then subtract closing inventory. If you start with $8,000, receive $18,000 of food and close with $6,000, the cost of food used is $20,000. Against $60,000 in food sales, that is $20,000 ÷ $60,000 = 33.33%.

Do not divide by all sales if beverages have a separate cost structure. If $12,000 of drinks are included in $72,000 total sales, a food-only numerator divided by total sales would misleadingly show 27.8%. The US Foods food-cost guidance discusses tracking food costs and price decisions; use local invoices and an actual inventory count for your number.

Why recipe cost and actual food cost differ

A recipe card can list $5 of ingredients for a $20 dish, suggesting a 25% theoretical food cost for that item. That is not the restaurant's period result. Trim, over-portioning, spoiled ingredients, staff meals and price changes can make actual consumption higher. Count beginning and ending stock the same way, keep units consistent and record waste separately so you can investigate the difference.

For example, 1,000 bowls at $5 theoretical ingredients imply $5,000 usage. If matched inventory records show $5,700 food used for those bowls and no other meals in that category, the $700 gap needs explanation. At $20 each, sales of those bowls are $20,000; theoretical food cost is 25% and actual is 28.5%. A $0.70 per-bowl difference can be material even when the headline percentages look close.

Three inventory situations that change the percentage

Stable operation: $8,000 beginning stock + $18,000 purchases − $6,000 ending stock = $20,000 used. With $60,000 food sales, the result is 33.3%.

More waste, same food sales: suppose closing stock falls to $4,000 because usable food is gone, while beginning stock and purchases remain the same. Food used rises to $22,000. At $60,000 food sales, food cost becomes 36.7%. Check records before assuming that loss was all waste; count errors, staff meals and theft also affect the reconciliation.

Price rise without better purchasing: food used remains $20,000, but food sales reach $66,000 after a price change with the same mix. Cost percentage falls to 30.3%. The ratio improved even though the dollars of food used did not. Compare volume, menu mix and margin alongside the percentage.

Turn the food cost formula into a variance check

The month-end percentage answers what the restaurant used. Your recipe cards estimate what the dishes you sold should have used. Compare both on the same period and the same sold mix. In the example above, inventory says $20,000 of food was used against $60,000 of food sales: 33.33%. Now suppose the recipe quantities for the actual dishes sold add to an illustrative $18,200 at the relevant ingredient prices. The theoretical cost rate is $18,200 ÷ $60,000 = 30.33%. The dollar difference is $1,800, or three percentage points of food sales.

That $1,800 is a question to investigate, not automatically a theft or waste figure. First check the opening and closing count sheets for the expensive ingredients and confirm that received invoices and supplier credits are in the correct period. Then compare portion sizes, prep yield, spoilage, staff meals and promotions against the recipe model. A purchase price increase may make an old recipe card understate theoretical cost without any change in kitchen practice. Record each cause once: inventory used already captures food that was discarded, so adding the same recorded waste again to the numerator would double-count it.

Small count errors can change the conclusion. If closing inventory was entered as $5,500 when a corrected count is $6,000, the incorrect calculation would show ($8,000 + $18,000 − $5,500) ÷ $60,000 = 34.17%, rather than 33.33%. Correct the underlying units and values before changing menu prices. If you decide the ingredient cost has genuinely changed, the restaurant menu-pricing method deals with a specific dish; restaurant prime cost adds labor to the period-level picture.

What changes the answer

Consistent inventory valuation matters: counting one period at purchase cost and another at retail value produces a false trend. Returns and supplier credits must be assigned to the right period. Food supplied to employees, promotions and complimentary dishes use inventory without adding normal food sales, so record them rather than burying them in an unexplained variance. Track packaged takeaway costs separately if the purpose is ingredient food cost; include those costs in per-order contribution when checking break-even.

Check recipe yields and portion weights on best-selling dishes first. An ingredient may look cheap by the case but lose a large share to trimming or spoilage. The restaurant can have a sound food-cost percentage yet still lose money if guaranteed labor and rent exceed the remaining contribution.

How to run your own numbers

Reconcile inventory and food sales for the same month; for each menu category calculate contribution after ingredients, packaging and sale-dependent fees. Then check whether the resulting sales mix covers fixed costs and realistic owner compensation.

Enter your own average ticket, variable cost, monthly fixed costs, owner pay and operating capacity in the free restaurant break-even calculator. It is a planning model, not a forecast of customer demand.

Common mistakes

Dividing food used by beverage-inclusive sales. Keep numerator and denominator on the same basis. Counting a delivery on the wrong date. A purchase received after month-end belongs in the next period unless your accounting method properly records it as received before closing.

Comparing actual COGS to one recipe. Compare the theoretical cost of the entire sold mix. Ignoring inventory units. A case of 24 bottles is not one bottle. Using a benchmark as a pricing command. A concept with more prep labor and less ingredient cost has different economics than a simple beverage counter.

Turn the percentage into an operating decision

If food used is $22,000 on $60,000 of food sales after it was $20,000 the prior month, locate the $2,000 movement: count variances by item, supplier price changes and menu mix. A better recipe card will not recover missing stock if portion practice is the issue. Once food cost is reliable, update prices and required order volume using current ingredient costs.

• Use beginning stock + purchases − ending stock for food used.
• Divide food cost by food sales from the same period.
• Compare actual and theoretical costs on the same mix.
• Use per-order contribution for the break-even decision.

FAQs

What is a good food cost percentage for a restaurant?

There is no single percentage that tells you whether the restaurant makes money. Compare food cost with menu mix, labor, occupancy and the contribution you need from each order.

Can I calculate food cost without inventory counts?

You can estimate from recipes, but that is theoretical cost. You need reliable beginning and ending inventory to calculate actual food used for a period.

Do beverage sales go in the food cost denominator?

No, if your numerator includes food inventory only. Track beverages separately or combine both numerator and denominator when analyzing total cost of goods sold.

Why did food cost rise when prices did not change?

Possible causes include waste, larger portions, supplier increases, more sales of expensive dishes or an inaccurate inventory count. Reconcile units before acting.

How is food cost percentage different from menu markup?

Food cost percentage looks at ingredients relative to sales; markup compares a selling price with its cost. Neither includes all overhead or guarantees profit.

Should packaging count as food cost?

Keep the definition consistent. For ingredient food cost, show packaging separately; for per-order contribution, include packaging and other costs that rise with each order.

Browse the MyBreakeven guide library for other business models.