Costs and stock
Theoretical vs actual food cost: how to measure and fix the gap
Theoretical food cost tells you what your menu should cost. Actual food cost tells you what it really costs. The gap is where margin quietly disappears.
Klyra Editorial · Published on 12 January 2026 · 7 min read
Theoretical food cost is what each dish should cost if recipes were followed exactly: add up ingredient cost per portion from the standard recipe and compare it with the selling price. Actual food cost is calculated after the fact: cost of goods consumed in a period (purchases plus opening stock minus closing stock) divided by revenue for the same period.
A worked example
A pizzeria sells 800 margherita pizzas in a month at €7 each: revenue €5,600. The standard recipe costs €1.75 per pizza, so theoretical food cost is €1,400, or 25%. At month end, checking purchases and stock of mozzarella, tomato and flour, actual consumption comes to €1,610: actual food cost 28.75%. The gap is 3.75 points, worth €210 that month on this line alone.
Where the gap comes from
- Portions larger than the recipe (mozzarella eyeballed instead of weighed)
- Prep waste: trim, spoiled stock, remade mistakes
- Theft or unrecorded consumption, more common without stock control
- Supplier price increases not yet updated in recipe cards
- Comps and reworks for complaints, often untracked as a cost
How to isolate the cause
- Update recipe cards whenever a relevant purchase price changes
- Do a stock count at period end using the same units as purchases
- Compare the gap by product category (meat, dairy, drinks) rather than on the total
- Spot-check portions of your best sellers by weighing them in the kitchen
To calculate a dish in a few seconds, no spreadsheet needed, try Klyra's free tool: /strumenti/calcolo-food-cost. Enter ingredients and selling price and get theoretical food cost and margin instantly.
FAQ
What is an acceptable food cost?
It varies a lot by venue type and dish: pizza naturally runs a lower food cost than seafood. Consistency over time and the theoretical-vs-actual comparison matter more than a fixed number.
How often should theoretical food cost be recalculated?
Whenever a key ingredient price changes significantly, and at every seasonal menu revision.
Should the gap be calculated across the whole menu?
It is more useful per dish or category: a dish with a large gap can hide inside an otherwise acceptable overall average.
Keep reading
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