What is food cost percentage?
Food cost percentage is the ratio of your ingredient costs to your food revenue, expressed as a percentage:
Food Cost % = (Cost of Goods Sold ÷ Food Revenue) × 100For example, if you spent €8,000 on ingredients last month and earned €25,000 in food sales, your food cost percentage is 32%.
Why it matters
Food cost is the single largest controllable expense in a restaurant. A 2-point improvement in food cost percentage on €500,000 annual revenue puts €10,000 straight to the bottom line — without serving a single extra customer.
Industry benchmarks
Most successful restaurants aim for a food cost percentage between 28% and 35%, depending on the type of establishment:
- Fine dining: 30–35%
- Casual dining: 28–32%
- Quick service: 25–30%
- Bars (food): 30–35%
- Cafés: 28–32%
These are guidelines, not rules. A restaurant with 40% food cost but 80% gross margin on beverages can be extremely profitable.
How to calculate it properly
Actual food cost (period-based)
The most accurate method uses inventory counts:
- 1.Take beginning inventory value
- 2.Add all purchases during the period
- 3.Subtract ending inventory value
- 4.Divide by food revenue for the same period
Theoretical food cost (recipe-based)
This uses your recipe cards to calculate what food cost should be based on what was sold:
Theoretical Food Cost % = Sum of (each dish sold × its recipe cost) ÷ Food Revenue × 100The gap between actual and theoretical food cost reveals waste, theft, and portioning issues.
Five strategies to lower food cost
1. Track prices religiously
Supplier prices change constantly. If you are not tracking them, you are flying blind. Even a 5% increase on a high-volume ingredient can wipe out your margin on multiple dishes.
2. Right-size your portions
Portion drift is one of the biggest silent killers of food cost. Weigh portions regularly and train your team on standards. A kitchen scale costs €20 — portion drift can cost €2,000 per month.
3. Reduce waste systematically
Track waste daily. Know what gets thrown away and why. A waste log takes five minutes a day and can save thousands per month. Common culprits: over-prep, spoilage from poor rotation, and plate returns.
4. Engineer your menu
Not all dishes are created equal. Use a menu engineering matrix:
- Stars: high popularity, high margin — promote heavily
- Plowhorses: high popularity, low margin — re-engineer to reduce cost
- Puzzles: low popularity, high margin — reposition or add server recommendations
- Dogs: low popularity, low margin — remove from the menu
5. Negotiate with data
When you have clear price history across suppliers, you negotiate from a position of strength. Show your supplier the competitor price and ask them to match it. Even a 3% improvement on your top 20 ingredients makes a meaningful difference.
Common mistakes
- Calculating food cost monthly instead of weekly — by the time you see a problem, four weeks of margin have already leaked
- Ignoring theoretical vs actual gap — if you only track actual food cost, you cannot distinguish between price increases and operational waste
- Not accounting for staff meals and comps — these should be tracked separately, not buried in food cost
Tools that help
Modern restaurant platforms like bilz.ai automate much of this: invoice scanning feeds real purchase prices into your recipe cards, food cost updates in real time, and you get alerts when supplier prices change.
