Food Cost Percentage and How to Calculate It

In short: food cost percentage is the cost of the food you used divided by the food you sold, both without sales tax. It is the first number most owners learn and the one that most often hides a problem. Calculate it two ways, from real stock (actual) and from recipes (theoretical), and study the gap.

If you do only one piece of financial control in your kitchen, make it this one. Food is usually the biggest cost after labour, and unlike rent it responds to what you do this week.

The formula

Food cost percentage = cost of food used / food sales x 100

The cost of food used is:

Opening stock + purchases - closing stock

Use the same period for both: a week or a month. Use sales without tax, and keep food and drink separate.

Add to the cost anything that left the kitchen without a sale and is not separately recorded: staff meals, tastings, spoilage. Some owners track these separately as waste and allowances. See reduce food waste.

Theoretical food cost

Theoretical cost is what the food should have cost, given what you sold. Take each dish's plate cost from recipe costing and multiply by the portions sold.

In the example, the recipes say the sold dishes should have used 8,700 of ingredients.

Theoretical food cost = 8,700 / 30,000 = 29.0%.

The gap, 800 or 2.7 points, is the variance. It is not all theft, and it is rarely one thing. It is the sum of waste, over portioning, mistakes, uncounted items, price changes since you costed the recipe and counting error.

Why both numbers matter

• Actual tells you what happened to your money.
• Theoretical tells you what should have happened.
• The gap tells you where to look.

If actual and theoretical both rise, your menu or your prices have changed. If only actual rises, you have leakage. If both fall, check that you have not cut portion sizes beyond what guests accept.

DineHarbor's inventory tools connect stock items, recipes, purchase orders and counts, and reports give the sales side. Together they let you compare. You still decide which causes are real. See stock control for how to run a count.

What is a good target?

You will see numbers like 25% to 35% quoted for restaurants. Trade and vendor articles do not agree, and they mix concepts. A pizzeria with cheap, high-margin ingredients may run well below a steakhouse. A bar can run a higher percentage on food that supports drink sales. A cafe with a large bought-in range may sit differently from a restaurant that cooks from scratch.

A better method is to set your own target:

1. Decide the profit you need (see gross profit and prime cost).
2. Work back from labour and fixed costs to the food cost you can afford.
3. Compare that with your menu's theoretical cost.
4. If they do not match, change prices, portions or the menu.

Why food cost goes up

Look at the likely causes in this order:

1. Supplier price rises that you have not passed on or re-costed.
2. Portions drifting upward, especially proteins, cheese and oil.
3. Waste: over prepping, spoilage, plate waste, mistakes returned to the kitchen.
4. Menu mix shifting to lower margin dishes.
5. Receiving errors: short deliveries, substitutions, price differences not caught. See suppliers and ordering.
6. Unrecorded usage: staff meals, comps, tastings, transfers between sites.
7. Count errors: wrong units, a missed storeroom, a delivery counted twice.
8. Theft, which is real but rarely the first explanation.

Six fixes that work

1. Standardise portions

Put spec cards by each station with the weight or count. Provide scoops, ladles and scales. Train cooks to the spec. Check three plates a week.

2. Re-cost and re-price

When a main ingredient goes up, update the plate cost and decide whether to adjust the price, the portion or the dish. See how to price a menu.

3. Tighten purchasing

Use a list with par levels, buy for the expected trade, check deliveries against orders and compare supplier prices every few months. A second supplier for key items is a useful check.

4. Cut waste at the source

Measure it. A waste log with reasons shows where food is lost: prep trim, spoilage, plate waste, errors. Then change the cause, such as prep quantities or storage.

5. Manage the menu mix

Use menu engineering to see which dishes make money. Promote stars, rework plowhorses, remove dogs.

6. Count regularly and fix the process

A consistent count on the same route, by the same person, with a second check for large differences. Count the high value items weekly and the rest monthly. Investigate variance calmly, as the stock control guide explains.

A weekly routine

1. Count the priority items at close on the same day each week.
2. Record purchases and waste.
3. Calculate actual food cost for the week.
4. Compare with the theoretical figure.
5. Choose the top two causes and one action.
6. Check the same numbers next week.

It takes about an hour at first. The habit matters more than the precision.

What food cost does not show

Food cost percentage is a ratio, so a restaurant can improve it by raising prices while losing guests, or by cutting quality. Look at it beside sales, guest feedback and gross profit in money. The number you can bank is gross profit, not a pleasing percentage.

Also remember that other costs matter: labour, rent, fees and energy. Add them in the gross profit and prime cost guide, and check the five weekly numbers in the weekly numbers guide.

A worked fix

A made up example to show how the causes add up. A café finds its actual food cost is 33% against a theoretical 29%, a gap of 4 points on monthly food sales of 20,000, or 800. The owner counts the causes.

• Over portioned cheese and chicken on two popular dishes: about 250.
• Waste from prepping too much salad and soup on slow days: about 200.
• A supplier raised the price of dairy and the recipes were never updated: about 150.
• Staff meals and tastings, not recorded: about 100.
• A miscounted case of oil that was found later: about 100.

Five small causes, none of them dramatic. Each has a plain fix: scoops for cheese, a daily prep sheet linked to the forecast, an updated recipe, a staff meal allowance and a stricter count. Within two months the gap falls to about 2 points.

Different concepts, different patterns

A takeaway that sells cheap staples with high volume often has a low food cost percentage but a high packaging cost, which should be tracked next to food. A fine dining room may accept a higher food cost because the price carries labour and service. A bakery tracks yield and waste of dough and unsold bread. A bar-restaurant balances a higher food cost against drink margin. Compare your own figure with your own history first, and with outside figures last.

Getting a clean count

The percentage is only as good as the numbers behind it. Count on the same day and at the same time each period, after deliveries are booked in and before prep starts. Count every storage place, including the freezer, the bar store and the shelf in the corridor. Write open items as a fraction or a weight, and agree one method for it. Keep the closing count of one period as the opening count of the next, and do not adjust it afterwards to make the result look better.

If you cannot count everything every week, count the high value and fast moving items weekly (meat, fish, cheese, oil, spirits) and the rest monthly. Together those lines usually carry most of the value, so you see most of the leakage with a fraction of the effort.

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