Why does your food cost always come out higher than what your recipes suggest? Theoretical food cost is what you calculate based on recipes, but actual food cost includes waste, inconsistent portions and trim loss. Here's how to calculate both and explain the difference to your team.
What is theoretical food cost?
Theoretical food cost is what your food cost should be according to your recipes. You calculate this by adding up all the ingredients in a recipe and dividing by the selling price excluding VAT.
💡 Example of theoretical food cost:
Pasta carbonara according to recipe:
- Pasta: €0.80
- Pancetta: €2.10
- Eggs: €0.90
- Parmesan: €1.40
- Other ingredients: €0.30
Total ingredients: €5.50
Selling price: €16.50 excl. VAT
Theoretical food cost: (€5.50 / €16.50) × 100 = 33.3%
What is actual food cost?
Actual food cost is what you really spend on ingredients in relation to your revenue. You calculate this by dividing your total ingredient purchases by your total revenue excluding VAT over the same period.
Formula for actual food cost:
Actual food cost % = (Total ingredient purchases / Total revenue excl. VAT) × 100
💡 Example of actual food cost:
Last month:
- Total ingredient purchases: €18,500
- Total revenue excl. VAT: €48,600
Actual food cost: (€18,500 / €48,600) × 100 = 38.1%
Why do they always differ?
There are several reasons why actual food cost turns out higher than theoretical food cost:
- Waste: Products that expire or get thrown away
- Larger portions: Chef gives 250 grams of meat while recipe calls for 200 grams
- Trim loss: Processing whole fish or meat yields less than expected
- Tasting and testing: Chef tastes during prep, experiments with new dishes
- Mise-en-place surplus: Too much prepped for the expected rush
Most kitchen managers discover too late that these small variances compound into significant cost overruns. A 20-gram portion overage here, some expired herbs there - it adds up fast.
⚠️ Note:
A difference of 3-5 percentage points between theoretical and actual food cost is normal. If the difference exceeds 5 percentage points, there's often a structural problem.
How do you explain this to your team?
Use concrete examples from your own kitchen to make the difference clear. Explain that both figures matter: theoretical food cost to steer by, actual food cost to check against.
💡 Practical example for your team:
"Our beef steak should hit 32% food cost according to the recipe. Last week our total food cost was 37%. The 5% difference comes from:"
- 2% waste (vegetables past date)
- 2% larger portions than recipe
- 1% tasting and mise-en-place surplus
"If we bring this 5% back down to 2%, we'll earn an extra €150 per week."
Practical tips for your team
Make the difference between both food costs a regular discussion point in your kitchen. Hold a brief weekly meeting where you review both figures and agree on concrete actions.
- Weekly check: Compare theoretical and actual food cost from last week
- Portion control: Have team members weigh portions occasionally to raise awareness
- Waste log: Track what gets thrown away and why
- Team goals: Set a realistic target for actual food cost as a team
By sharing both figures transparently, your team better understands how their daily actions affect profitability. This creates greater awareness and delivers better results.
How do you calculate both food costs? (step by step)
Calculate theoretical food cost per dish
Add up all ingredients in your recipe and divide by the selling price excluding VAT. Use exact quantities according to recipe and current purchase prices.
Calculate actual food cost over a period
Divide your total ingredient purchases by your total revenue excluding VAT over the same period (week or month). Use only ingredient purchases, not packaging or cleaning supplies.
Compare and analyze the difference
Subtract theoretical food cost from actual food cost. Find the causes of the difference and make concrete agreements with your team to close the gap.
✨ Pro tip
Track both percentages on a kitchen whiteboard for exactly 4 weeks, updating every Monday morning. You'll spot patterns in waste and portion creep that aren't obvious from monthly reports alone.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
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Frequently asked questions
Which figure is more important: theoretical or actual food cost?
Both are important but serve different purposes. You use theoretical food cost to set prices and compile menus. Actual food cost shows whether you're hitting your targets and where you need to adjust.
How often should I calculate actual food cost?
Calculate actual food cost at least monthly, but preferably weekly. This way you can adjust quickly if things get out of hand and recognize patterns before they become expensive problems.
What is an acceptable difference between both food costs?
A difference of 3-5 percentage points is normal due to natural waste and minor variations. If the difference exceeds 5 percentage points, there's often a structural problem that needs immediate attention.
How do I motivate my team to be more conscious about portions?
Explain the financial impact in concrete amounts. For example: '5 grams extra meat per portion costs us €2,400 per year.' Make it tangible and discuss it regularly during team meetings.
Should I include beverages in food cost calculations?
No, beverages have their own 'pour cost' calculation. Keep food and beverage costs separate for a clear picture of both cost categories.
What if my theoretical food cost seems too low compared to actual?
Your recipes might not account for realistic trim loss or prep waste. Adjust your theoretical calculations to include a 2-3% buffer for unavoidable waste and processing losses.
How do I track waste effectively without overwhelming my staff?
Start simple with a single waste sheet near the trash. Note item, quantity, and reason (expired, dropped, overcooked). Review weekly patterns rather than daily details to avoid micromanaging.
📚 Sources consulted
- EU Verordening 852/2004 — Levensmiddelenhygiëne (2004) — Official source
- EU Verordening 853/2004 — Hygiënevoorschriften voor levensmiddelen van dierlijke oorsprong (2004) — Official source
- EU Verordening 1169/2011 — Voedselinformatie aan consumenten (2011) — Official source
- NVWA — Hygiënecode voor de horeca (2024) — Official source
- NVWA — Allergenen in voedsel (2024) — Official source
- Codex Alimentarius — International Food Standards (2024) — Official source
- FSA — Safer food, better business (HACCP) (2024) — Official source
- BVL — Lebensmittelhygiene (HACCP) (2024) — Official source
- Warenwetbesluit Bereiding en behandeling van levensmiddelen (2024) — Official source
- WHO — Foodborne diseases estimates (2024) — Official source
Food Standards Agency (FSA) — https://www.food.gov.uk
The HACCP standards shown in this application are for informational purposes only. KitchenNmbrs does not guarantee that displayed values are current or complete. Always consult the FSA or your local authority for the latest regulations.
Written by
Jeffrey Smit
Founder & CEO of KitchenNmbrs
Jeffrey Smit built KitchenNmbrs from 8 years of hands-on experience as kitchen manager at 1NUL8 Group in Rotterdam. His mission: give every restaurant owner control over food cost.
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