Most restaurant owners assume their cheapest staff always deliver the lowest cost per dish. But an intern taking 10 minutes on a plate might actually cost more than your sous chef finishing it in 3 minutes. Labor costs per portion tell the real story behind your dish economics.
Why labor costs per dish matter
Restaurant owners obsess over ingredient costs but ignore timing differences. Your sous chef might need just 3 minutes for a dish while your intern struggles for 8 minutes. That's the same plate with wildly different economics.
- Sous chef: €18 per hour = €0.30 per minute
- Intern: €6 per hour = €0.10 per minute
- Speed differences can triple your labor investment
Calculate labor costs per minute
Start by breaking down each employee's hourly wage. Divide their rate by 60 to get cost per minute.
💡 Example labor costs per minute:
- Sous chef: €18/hour ÷ 60 = €0.30 per minute
- Cook: €15/hour ÷ 60 = €0.25 per minute
- Intern: €6/hour ÷ 60 = €0.10 per minute
Measure prep time per dish
Time each dish from start to service-ready. Don't guess – use a stopwatch and get real numbers.
⚠️ Note:
Track multiple attempts and average them out. First attempts always run longer than after staff develop rhythm.
Calculate total costs per dish
Your real dish cost combines ingredients and labor. Here's the math:
Total costs = Ingredient costs + (Prep time in minutes × Cost per minute)
💡 Example: Risotto prepared by different employees:
Ingredient costs risotto: €4.20
Sous chef (3 minutes):
- Labor costs: 3 × €0.30 = €0.90
- Total: €4.20 + €0.90 = €5.10
Intern (8 minutes):
- Labor costs: 8 × €0.10 = €0.80
- Total: €4.20 + €0.80 = €5.00
Finding your most cost-effective employee
Sometimes your highest-paid cook delivers your cheapest plates. Speed trumps hourly wages more often than you'd expect.
💡 Example: Complex garnish:
Ingredient costs: €2.50
Sous chef (2 minutes): €2.50 + €0.60 = €3.10
Intern (12 minutes): €2.50 + €1.20 = €3.70
Savings: €0.60 per portion with the sous chef
Schedule your kitchen smarter
From analyzing actual purchasing data across different restaurant types, the most profitable kitchens match skill levels to dish complexity. Use your cost calculations to assign tasks strategically:
- Simple dishes: Perfect for interns and junior staff
- Technical preparations: Send to your sous chef or senior cook
- Rush periods: Deploy your fastest, most experienced team
- Prep work: Junior staff can handle this during slower periods
Factor in quality and waste
Raw speed isn't everything. An intern who ruins every fifth plate costs more than their hourly wage suggests.
⚠️ Note:
Track waste rates too – if 20% of attempts get scrapped, bump labor costs up by 20%.
Apply this data to scheduling
Armed with per-dish labor costs, you can optimize your entire operation. Put skilled cooks on intricate dishes and have newer staff handle straightforward prep tasks. The numbers don't lie.
How do you calculate labor costs per dish?
Calculate cost per minute per employee
Divide the hourly wage by 60. Sous chef €18/hour = €0.30 per minute. Intern €6/hour = €0.10 per minute.
Measure prep time per dish per person
Time from when they start preparing until the plate is ready. Measure multiple times and take the average for a reliable figure.
Calculate total costs per dish
Add ingredient costs to labor costs. Formula: Ingredients + (Minutes × Cost per minute) = Total cost per portion.
✨ Pro tip
Track prep times during both quiet periods and rush service over a 2-week span. Your intern might handle a garnish in 4 minutes during prep time but need 7 minutes during dinner rush – use the higher number for realistic costing.
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 ingredient gathering time in my calculations?
Absolutely – track the full process from when they start working on the dish until it's plated and ready. Ingredient gathering, prep, and plating all count as labor time.
How do I handle dishes that require multiple cooks?
Break the dish into components and calculate each person's contribution separately. If your sous chef does the protein (4 minutes) and an intern handles the garnish (6 minutes), add both labor costs together for your total.
What if I do major prep work hours before service?
Calculate total prep time and divide by portions produced. Two hours of prep for 40 portions equals 3 minutes of prep labor per dish. Add this to your per-portion plating time for complete labor costs.
📚 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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