A sushi restaurant owner watched his dream concept drain €15,000 in three months because guests consumed twice what he'd calculated. All-you-can-eat ventures can generate massive profits or devastating losses. The key difference? Understanding exactly what your heaviest eaters will cost you before opening your doors.
Why unlimited dining concepts often fail
Most restaurant owners think: "If I charge €25 and my average food cost is €8, I'll earn €17 per guest." That's completely wrong. With unlimited dining, every guest eats differently.
⚠️ Watch out:
Your food cost isn't determined by your average guest, but by your biggest eaters. They determine if your concept makes money or bleeds cash.
Calculate your break-even point per guest
Your break-even point represents the minimum amount needed to cover all expenses. For unlimited dining concepts, you'll calculate this differently than regular menu items.
💡 Example calculation:
Restaurant with unlimited sushi for €28.50 (incl. 9% VAT):
- Selling price excl. VAT: €26.15
- Staff costs per guest: €8.50
- Other costs per guest: €4.20
- Desired profit per guest: €5.00
Maximum food cost per guest: €26.15 - €17.70 = €8.45
This means each guest can consume a maximum of €8.45 in sushi before you start losing money.
Track actual consumption per guest
During a trial period of at least 14 days, you must monitor exactly how much each table consumes. No guessing allowed - weigh and count everything.
- How many pieces of sushi per person on average
- Which types get ordered most (pricier ingredients?)
- How much waste per table (ordered but uneaten)
- Difference between lunch and dinner
- Difference between weekdays and weekends
💡 Example measurements:
After 2 weeks of tracking in sushi restaurant:
- Average: 18 pieces per guest (€7.20 food cost)
- Top 20% eaters: 35 pieces per guest (€14.00 food cost)
- Waste: 15% of ordered quantity
Actual average food cost: €8.28 per guest
The 80/20 rule for unlimited dining
With unlimited concepts, the 80/20 rule often applies: 20% of your guests consume 50% of your food. This group determines if your concept succeeds or fails.
After managing kitchen operations for nearly a decade, I've seen this pattern destroy profitable restaurants. So calculate not just your average, but also:
- What your heaviest 20% of guests consume
- How much that costs per person
- How often these guests return (regulars who know the system often eat more)
Adjust with smart limitations
If your measurements show that your concept isn't viable, you can adjust without losing the unlimited appeal:
- Time limit: Maximum 2 hours per table
- Waste costs: €2 per uneaten piece
- Portion size: Maximum 6 pieces per order
- Premium items: Limited number per person
- Price differentiation: Different prices lunch/dinner
💡 Example adjustment:
Sushi restaurant implements:
- Maximum 4 pieces salmon/tuna per order
- €1 per uneaten piece
- Lunch €22.50, dinner €28.50
Result: average food cost drops to €6.80 per guest
Monitor your numbers continuously
Unlimited dining concepts require constant monitoring. Check weekly:
- Average food cost per guest
- Food cost of your top 20% eaters
- Waste percentage
- Number of guests vs. total food cost
With daily food cost tracking you can spot problems before they spiral out of control. Most systems will alert you if you exceed your break-even point.
How do you test if your all you can eat concept is viable?
Calculate your maximum food cost per guest
Subtract all other costs from your selling price (excl. VAT): staff, rent, energy, profit. What's left is your maximum food cost per guest.
Measure for 2 weeks exactly what each guest consumes
Weigh and count everything each table orders and actually eats. Also note waste. Focus especially on your biggest eaters (top 20%).
Compare actual costs with your maximum
If your average food cost is below your maximum and your top 20% eaters don't bring you above 150% of your maximum, your concept is viable.
✨ Pro tip
Track exactly 50 guests during your first 3 weeks to identify your consumption patterns and biggest cost drivers. You'll spot potential disasters before they happen and can adjust pricing or portions accordingly.
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 realistic food cost percentage for all you can eat?
For unlimited concepts, food cost often ranges between 35-45%, higher than regular restaurants. This gets compensated by lower service costs and higher turnover per guest.
Should I charge different prices for lunch and dinner?
Yes, guests often eat 20-30% more in the evening than during lunch. Different prices help you maintain profitability at both times.
How do I handle supplier price increases with unlimited dining?
With unlimited concepts you have less flexibility than regular menus. Immediately raise your selling price or implement restrictions on the most expensive ingredients to maintain margins.
📚 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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