How to Calculate Food Cost (And Reduce It)

Start with one site and one stock period. Read the short version below, then copy the prompt into your company-approved AI tool. For the theory behind the prompt and a detailed explanation of food cost, keep reading.

The short version

• The benchmark: AHBS, citing The Caterer, gives 28–32% of food sales for food and 18–24% of beverage sales for drinks. The benchmark that matters most is your own best-performing comparable site.
• Why it might be high: Missing purchases, late deliveries and inaccurate stock counts can distort total consumption. Missing waste records make it harder to explain that total. Check the data before blaming portions or waste.
• How to reduce it: Don't order stuff you don't need, count what you've ordered against what arrived and check the price you agreed is the price you're paying. Then standardise portions and log waste.

Copy this prompt to calculate your food cost

Example output with fictional figures

The adjusted figure separates recorded waste; it does not make that cost disappear. Normal preparation yield loss stays within costing.

The next checks might be delivery and invoice completeness, closing-stock accuracy and the evidence behind waste records. Totals alone do not establish the cause.

How to calculate food cost: the formula

There are hundreds of articles that will give you the food cost formula. Almost none of them will tell you why the number it produces is so often wrong, or why reducing food cost usually has less to do with cheaper ingredients and more to do with process discipline.

We work with UK multi-site hospitality groups facing food cost problems. This guide covers how to do the calculation properly and how to ensure the number is trustworthy enough to act on.

Start with total actual food consumption for the period, including food that was wasted:

Opening food stock + net food purchases + transfers in − transfers out − closing food stock

Net purchases means purchases less valid supplier credits and returns, counted once. Use food-only values at cost and net food sales for the same site and period, with consistent valuation and VAT treatment. Divide total consumption by net food sales and multiply by 100 to get actual food cost percentage.

A simple example: you sell £1,000 of food and the formula says you consumed £400 of ingredients. Your actual food cost is 40% and your gross profit is £600, or 60%. If £30 of that consumption was separately recorded spoilage or discarded food, show it separately. Waste-adjusted food cost is £370, or 37%.

This is a management measure, not total actual COGS or a basis for claiming £630 of gross profit. The business still incurred £400.

There are two non-negotiable elements when calculating your food cost:

1. Every input has to reflect reality. If purchases are missing, transfers between sites or departments weren't logged or stock counts are sloppy, total consumption will be wrong. Gaps in waste records affect the explanation and the adjusted measure; they do not remove waste from total consumption. Missing information is unknown, not zero.
2. Use the right period. Deliveries and sales must land in the stock period they belong to. A Thursday delivery keyed in on Monday makes this week look brilliant and next week look like a crisis. Both are false.

Theoretical food cost: the other number

Your actual food cost is the cost of food consumed during the period. Your theoretical food cost is what your recipes say you should have consumed: every dish sold, multiplied by its current recipe cost, summed.

Normal preparation loss belongs in recipe yield and food cost. A 5% meat-trimming allowance leaves 0.95kg usable from 1kg purchased. That loss must be included in the usable ingredient cost, not deducted again as separately recorded waste.

The difference between actual and theoretical is your variance. For a practical investigation sequence, read our restaurant stock variance investigation checklist.

Get your actual right before you build the theoretical. Some operations don't run full recipe management at all: they keep their actual margin solid and run the business from there. Recipes, theoretical costing and variance analysis are powerful, but none of it means anything until the actual is trustworthy. Read more about actual GP before theoretical GP.

What's a good food cost percentage in the UK?

AHBS attributes a benchmark to The Caterer of 28–32% of food sales, with beverage costs at 18–24% of beverage sales. Treat this as an indicative comparison, with the secondary attribution made explicit. Published ranges vary by format.

In Hops' opinion, the industry table matters less than your own operation. If you run multiple sites on the same menu with the same suppliers, your best-performing comparable site is your benchmark. One site at a 1.5-point variance and its sister site at 5 tells you where to look. Consider differences in sales mix and trading conditions before drawing a conclusion.

Be careful with your blended GP. The bar and the kitchen are two different operations under one roof. Blend them into a single percentage and you get a number that is harder to act on. When it comes in low, the head chef blames the bar, the bar blames the kitchen and nobody can prove anything.

Split food cost and GP by department first to make accountability and investigation straightforward.

GP percentage isn't the same as margin contribution. A department running 90% GP but contributing £3,000 delivers fewer gross profit pounds than one running 65% GP and contributing £60,000. Labour and other operating costs still matter when assessing overall profitability.

For the cross-site perspective, read same dish, same price, different GP.

Why is my food cost so high?

If your calculation is above a suitable comparison, resist the instinct to march into the kitchen. Check these possible system and process causes first.

1. You're not counting all your costs

A team once celebrated 75% GP at month end. Then the accountant called: one site had been ordering through a supplier portal that wasn't connected to the system and those purchases were never logged. Their real GP was 25%.

GP looks brilliant when you're not counting all your costs. Food cost looks mysterious when some of it arrives weeks later in the wrong period. Every order that comes through the back door must exist in the system.

2. You're paying for stock you never received

Short, damaged, substituted or incorrectly priced deliveries can leak into your food cost line. Check the delivery against the purchase order at the back door before signing. Record shortages and pursue the corresponding supplier credits.

3. Supplier prices moved and nobody caught it

Fresh produce prices can move weekly. If a supplier's rate has drifted up since your menu launched and your recipes were never updated, actual cost can run above theoretical cost while the kitchen has changed nothing.

4. Portions are running heavy

Theoretical says 6kg of cheese should have gone out; the count says 10kg. Portion drift is one possible explanation, alongside spoilage, recording errors and unexplained consumption. Measured portions give you evidence to test it. Don't assume that the gap proves over-portioning.

5. Waste is happening but not being recorded

WRAP's restaurant food waste guidance recommends measuring waste, engaging staff and rethinking inventory and purchasing practices.

If your waste log is nearly empty and your food cost is high, check whether spoilage and actual discards are being recorded. An empty log is not proof of the cause. Keep discards separate from normal preparation yield loss and avoid deducting anything already accounted for elsewhere.

How to reduce food cost: the three disciplines

1. Don't order stuff you don't need

Ordering without context is guesswork. Before an order goes out, the person placing it should be able to see current stock levels, what the site typically orders per week and price per gram or millilitre across suppliers.

The control lever sits before the order. Most operations authorise payments, but by the time an invoice is approved the goods have arrived and been used. An order for 1,000 kilos of peppers instead of 10 is a problem to catch before it is sent. Pre-order authorisation limits, set per person and grown with experience, help prevent it.

2. Count what you've ordered against what arrived

Someone at the back door should check quantities against the purchase order before signing. Log shortages and flag substitutions at the moment of delivery, while the driver is still there and the discrepancy is visible on the delivery note.

3. Check the price you agreed is the price you're paying

Confirming a delivery arrived is different from confirming its price. If you agreed £10 per kilo, check that the invoice reflects it. If it doesn't, follow through: credits need to be raised, chased and reconciled.

Keep a weekly rhythm: count your 15–20 highest-value lines, close each period with every order processed and check for missing waste entries. Show the numbers to the people who control them. A completed waste review should distinguish a confirmed zero from an unknown.

Put the calculation into practice

Hops® is a hospitality operations platform built by operators for UK multi-site restaurant and hotel groups. It captures purchases at source, supports delivery checks at the back door and puts actual GP by department in front of the people who control it.

Explore Hops Inventory or book a demo.