A conveyor belt sushi restaurant has unique cost challenges: you make many different sushi ahead of time without knowing what will sell. Many owners lose money because they don't have control over portion costs and waste. In this article you'll learn step-by-step how to set up a cost model that fits the conveyor belt formula.
Why normal cost models don't work for sushi
At a regular restaurant you make a dish after the customer orders. With conveyor belt sushi you make it ahead and hope it sells. This requires a different cost model.
⚠️ Watch out:
Waste with conveyor belt sushi is often 15-25% of your production. You need to factor this into your cost price, or you'll lose money on every plate.
The three cost components for sushi
A sushi cost price consists of three parts:
- Ingredient costs: fish, rice, nori, wasabi, ginger
- Waste percentage: what you throw away at the end of the day
- Labor costs per plate: time to make and clean up
Calculate your base costs per sushi type
Start with your most popular sushi types. Figure out what each plate costs in ingredients.
💡 Example: Salmon nigiri (2 pieces per plate)
Ingredient costs per plate:
- Salmon (40g): €1.20
- Sushi rice (60g): €0.15
- Wasabi, ginger: €0.05
Total ingredients: €1.40
Factor waste into your cost price
This is crucial: what you throw away at the end of the day needs to be factored into the cost price of what you do sell.
Formula: Actual cost price = Ingredient costs / (1 - Waste percentage)
💡 Example: Factoring in waste
Salmon nigiri ingredients: €1.40
Waste: 20% (you throw away 1 out of 5 plates)
Actual cost price: €1.40 / 0.80 = €1.75
You need to earn €1.75 per sold plate to break even.
Set your selling prices by color code
Many sushi restaurants work with colored plates. Each color has a fixed price. Group your sushi by cost price and assign colors.
- Yellow plate (€2.50): Simple sushi, cost price up to €0.85
- Red plate (€3.50): Medium sushi, cost price €0.85-€1.20
- Black plate (€4.50): Premium sushi, cost price €1.20-€1.55
⚠️ Watch out:
Always calculate with the price excluding VAT. A black plate of €4.50 is €4.13 excluding 9% VAT. Your food cost then becomes: €1.55 / €4.13 = 37.5%.
Monitor your daily production vs sales
Keep track of how many plates you make and how many you sell. This helps you adjust production and reduce waste.
💡 Example: Daily tracking
Monday production:
- Salmon nigiri: 40 plates made, 32 sold (20% waste)
- Tuna sashimi: 25 plates made, 23 sold (8% waste)
- California roll: 30 plates made, 30 sold (0% waste)
Action: Make less salmon nigiri tomorrow, California roll is popular.
Adjust your cost model based on data
After a month you'll have enough data to adjust your waste percentages per sushi type. Some sushi keeps better than others.
Update your cost prices monthly based on:
- Actual waste percentages per sushi type
- Changed purchase prices (especially fish fluctuates a lot)
- Seasonal differences in popularity
How do you set up a sushi cost model? (step by step)
Make a list of your top 20 sushi
Start with your most made sushi types. Note exactly which ingredients are in them and in what quantities. Measure this precisely, don't estimate.
Calculate ingredient costs per plate
Add up all ingredient costs: fish, rice, nori, wasabi, ginger, sauces. Calculate with your actual purchase prices, including cutting loss on fish.
Measure your waste for a week
Keep track of how many plates you throw away per sushi type. Calculate the waste percentage: thrown away / total made × 100.
Calculate actual cost price including waste
Use the formula: ingredient costs / (1 - waste percentage). This is your real cost price per sold plate.
Assign plate colors based on cost price
Group sushi with similar cost prices under the same plate color. Make sure your food cost stays under 35% per color category.
✨ Pro tip
Start each day with the same base quantities per sushi type. After a month you'll see patterns by weekday and can fine-tune your production. Thursday-Sunday are usually busier.
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 normal waste for conveyor belt sushi?
Between 15-25% of your production is normal. Less than 15% is excellent, more than 25% costs too much money. Measure this per sushi type, because some items keep better than others.
How often should I update my sushi cost prices?
At least once a month, especially because fish prices fluctuate a lot. Also check your waste percentages weekly to adjust your production.
Should I include labor costs in my sushi cost price?
For cost price calculation focus on ingredients plus waste. Calculate labor costs separately as a percentage of revenue (usually 25-35% for sushi restaurants).
What food cost percentage is normal for sushi?
Due to waste, sushi food cost is higher than regular restaurants: 30-38% is standard. Under 30% is excellent, above 40% you're probably losing money.
How do I prevent too much waste with expensive fish?
Make premium sushi like tuna and uni in smaller batches throughout the day. Start with 5-10 plates, refill as they sell. Better to refill 3 times than throw away.
📚 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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