How to Calculate Food Cost Percentage Correctly
Food cost percentage is one of the most useful figures on a menu, but only when it is calculated consistently. A small error in the portion cost or selling price can make a profitable dish appear stronger than it really is.
What Does Food Cost Percentage Mean?
Food cost percentage shows how much of a dish’s selling value is used by its ingredient cost.
Food cost percentage = Portion cost ÷ Net selling price × 100
It is a useful measure of menu performance, but it is not the same as overall profit. Labour, rent, utilities, waste and other operating costs must still be paid from the gross profit remaining.
1. Calculate the True Portion Cost
Start with the current purchase price of every ingredient and calculate the exact quantity used in one portion.
Include items that are easily overlooked, such as:
- Garnishes
- Sauces and dressings
- Cooking oils
- Seasonings
- Bread or side accompaniments
- Takeaway packaging, where applicable
Use the usable quantity after trimming, cooking loss or waste where this materially affects the cost. Supplier prices should also be updated regularly because an old purchase price produces an old and potentially misleading result.
2. Use the Correct Selling Price
If the business is VAT registered and the menu price includes VAT, calculate food cost percentage using the selling price excluding VAT.
For example, a dish sold for £12 including VAT at 20% has a net selling price of £10.
If its portion cost is £3:
£3 ÷ £10 × 100 = 30%
Using the full £12 menu price would incorrectly produce a food cost percentage of 25%.
A business that is not VAT registered does not remove VAT from its selling price. VAT treatment can vary, so businesses should confirm their position with an accountant or HMRC where necessary.
3. Look Beyond the Percentage
There is no single ideal food cost percentage for every dish or every business. The appropriate target depends on the type of operation, pricing level, customer expectations and operating costs.
The cash gross profit generated by each sale also matters. A dish with a higher food cost percentage may still contribute more gross profit in pounds than a cheaper dish with a lower percentage.
Food cost percentage, gross profit per item and sales popularity should therefore be considered together.
Common Costing Errors
Common mistakes include:
- Using outdated supplier prices
- Estimating portion sizes instead of measuring them
- Ignoring preparation waste or cooking loss
- Forgetting garnishes, oils, sauces or packaging
- Using a VAT-inclusive selling price for a VAT-registered business
- Confusing gross profit with final business profit
Accurate costing does not automatically mean prices must increase. It gives the business reliable information for deciding whether to adjust a portion, ingredient, supplier, recipe or selling price.
Need a Clearer View of Your Menu?
The Menu Ledger provides independent menu costing and pricing audits for UK hospitality businesses. Each audit shows what selected dishes cost, their food cost percentage, gross profit per item and an appropriate target selling price.