Your brunch menu could be bleeding money without you knowing it. Most entrepreneurs miscalculate eggs, ignore fruit waste, or apply wrong VAT rates. You'll think your food cost sits at 30% while it's actually hitting 45%.
The 5 biggest calculation mistakes with brunch
Brunch draws crowds but destroys profits if you mess up cost calculations. From analyzing actual purchasing data across different restaurant types, these errors show up repeatedly:
⚠️ Heads up:
Brunch often has 20-30% higher food cost than lunch due to fresh ingredients and generous portions. Factor that in from the start.
Mistake 1: Calculating eggs incorrectly
Most owners calculate per egg, but forget weight variations. An M-egg weighs 53-63 grams, while L-eggs hit 63-73 grams.
💡 Example of incorrect calculation:
Benedict with 2 eggs, L-eggs €0.35 each:
- Wrong: 2 × €0.35 = €0.70
- Correct: 2 × 68 grams × €5.50/kg = €0.75
Difference: €0.05 per portion = €1,300/year at 100 portions/week
Always calculate by weight: Number of grams × price per kilo. This keeps you accurate, even if you switch suppliers.
Mistake 2: Underestimating cutting loss on fresh fruit
Fresh fruit wastes more than you think. Pineapple loses 40%, melon 35%, citrus 25%. But most entrepreneurs calculate using purchase price per kilo, not actual usable weight.
💡 Example pineapple:
Whole pineapple €3.50/kg, cutting loss 40%:
- Yield: 60%
- Actual price: €3.50 ÷ 0.60 = €5.83/kg
- For 150g portion: €0.87 (not €0.53)
Difference: €0.34 per portion
Mistake 3: Applying VAT incorrectly
Brunch mixes food (9% VAT) with drinks. But alcoholic beverages carry 21% VAT, not 9%. This throws off your entire food cost calculation.
⚠️ Heads up:
Mimosa for €8.00 incl. VAT = €6.61 excl. VAT (not €7.34). Always calculate with the correct VAT rate for your food cost.
Mistake 4: Undervaluing bread and baked goods
Fresh bread looks cheap but hides costs: cutting waste, stale bread loss, plus labor for slicing and plating.
- Bread cutting loss: 8-12% due to crusts and uneven slices
- Waste: 10-15% of purchased bread goes unsold
- Labor: 2-3 minutes per bread basket for prep and garnish
Calculate real costs: purchase price ÷ (100% - cutting loss% - waste%).
Mistake 5: Not standardizing portion sizes
Brunch portions run bigger than lunch. Without standards, your food cost swings between 25% and 50% per plate.
💡 Example Benedict variation:
Hollandaise sauce per portion:
- Chef A: 40ml = €0.85
- Chef B: 65ml = €1.38
- Chef C: 25ml = €0.53
Difference: €0.85 per portion between lowest and highest
How do you prevent these mistakes?
Work systematically with exact portions and real cost prices:
- Weigh everything: Use precision scales for all ingredients
- Calculate cutting loss: Measure difference between purchase and usable weight
- Standardize portions: Use measuring tools and scales consistently
- Update prices: Check supplier costs monthly minimum
Tools like KitchenNmbrs automate these calculations and track changes, so you'll always see actual food costs.
How do you calculate brunch cost prices correctly? (step by step)
Gather all ingredients and weigh exactly
Make a complete list of all ingredients per dish. Weigh each component: eggs per gram, fruit after cutting, bread after crust removal. Use a precision scale.
Calculate actual prices including loss
For each ingredient with cutting loss: divide the purchase price by the yield percentage. Pineapple €3.50/kg with 40% loss = €3.50 ÷ 0.60 = €5.83/kg actual price.
Add up all costs and calculate food cost percentage
Sum all ingredient costs per portion. Divide by your selling price excluding VAT and multiply by 100. For brunch, 35-42% food cost is normal due to fresh ingredients.
✨ Pro tip
Track your top 3 brunch dishes for exactly 7 days this month - weigh every ingredient and calculate true cost per plate. Most owners discover they're off by 8-15% from their estimates.
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
What is a normal food cost for brunch?
Brunch typically runs 35-42% food cost due to fresh ingredients and generous portions. This beats lunch costs (28-35%) but stays normal for this service type.
How do I calculate combination deals like brunch + mimosa?
Calculate each part separately: brunch food cost on 9% VAT basis, mimosa on 21% VAT basis. Add ingredient costs and divide by total selling price excluding VAT.
Should I include labor for cooking eggs in the cost price?
No, labor costs stay separate from food cost in your overall structure. Food cost covers ingredients only. Calculate labor as a separate percentage of revenue.
📚 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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