How much does your diced onion or marinated protein really cost per portion? Most kitchens guess at mise-en-place costs, but every ingredient and every bit of prep waste adds up. You need precise calculations to avoid losing money on what seems like "free" prep work.
Why mise-en-place cost price matters
Mise-en-place feels free since you prep it ahead of service. But that diced onion, marinated protein, and house-made sauce all require ingredients and generate waste. Without factoring these costs, your dishes appear cheaper than reality.
⚠️ Heads up:
Most kitchens prep 20% extra mise-en-place as insurance. That buffer costs real money while generating zero revenue.
Gather all ingredients and quantities
List every single ingredient in your mise-en-place recipe. Don't forget marinades, spice blends, and cooking oils - they all count.
💡 Example: Marinated chicken fillet (10 portions)
For 10 portions of 150 grams each you need:
- Chicken fillet: 1.5 kg × €8.50/kg = €12.75
- Olive oil: 50ml × €12/liter = €0.60
- Garlic: 2 cloves × €4/kg = €0.08
- Spices: estimated €0.15
Total ingredients: €13.58
Account for cutting loss and waste
Prep work always generates loss. Peels, trimmings, stems - they're unavoidable but costly.
- Peeling onions: 8-12% loss
- Peeling carrots: 15-20% loss
- Trimming meat: 5-10% loss
- Picking herbs: 10-15% loss
💡 Example: Diced onion
You need 2 kg of diced onion:
- Purchase: 2.3 kg whole onions (15% loss from peeling)
- Price: 2.3 kg × €1.20/kg = €2.76
- Per kg diced onion: €2.76 / 2 kg = €1.38/kg
Actual price diced onion: €1.38/kg (not €1.20/kg)
Calculate the cost price per portion
From tracking this across dozens of restaurants, I've seen how critical accurate portioning becomes. Divide total ingredient costs by your actual usable portions, including prep waste.
Formula: Cost price per portion = (Total ingredient costs + Loss) / Number of usable portions
💡 Example: Complete calculation marinated chicken
Ingredients: €13.58 (see above)
Loss during marinating: 5% = €0.68
Total costs: €13.58 + €0.68 = €14.26
Usable portions: 10 pieces
Cost price per portion: €14.26 / 10 = €1.43
Account for shelf life
Unused mise-en-place past its prime becomes pure loss. Build in a 5-10% safety margin for spoilage and overproduction.
⚠️ Heads up:
Prepared items like marinated proteins and diced vegetables spoil faster than raw ingredients. Match your mise-en-place production to realistic sales forecasts.
Update your purchase prices regularly
Supplier prices shift constantly. Review your purchase prices monthly minimum, especially for high-volume mise-en-place items.
A centralized system helps you track purchase prices and instantly see how changes affect your per-portion costs.
How do you calculate mise-en-place cost price? (step by step)
List all ingredients with quantities
Write down every ingredient you use, including oil, spices, and marinades. Weigh or measure the exact quantities you need for the desired number of portions.
Calculate total ingredient costs
Multiply each quantity by the purchase price per unit. Add all costs together for the total amount spent on ingredients.
Add loss and waste to the costs
Add 5-15% for cutting loss, spoilage, and surplus (depending on the type of mise-en-place). Then divide by the number of usable portions for the cost price per piece.
✨ Pro tip
Weigh your finished mise-en-place within 48 hours of prep to verify your yield calculations. If 2kg of whole onions only gives you 1.6kg diced instead of your expected 1.8kg, your loss percentage needs adjusting.
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
Should I include labor time in mise-en-place cost price?
For food cost calculations, stick to ingredients only. Labor gets factored separately as part of your total dish cost structure.
What if I use different suppliers for the same ingredient?
Calculate an average purchase price based on your actual buying patterns. Or use your primary supplier's price if they handle 80% or more of your volume.
How do I handle mise-en-place used across multiple dishes?
First nail down the cost per portion of your mise-en-place. Then calculate how many grams or pieces each dish uses and multiply by your per-unit cost. This gives you accurate allocation across your menu.
📚 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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