Your restaurant is packed every evening, but your profit disappears like snow in the sun. The problem isn't in your kitchen, but in hidden costs that rise faster than your revenue. Discover where your margin is leaking and how to stop it.
The paradox of the busy restaurant
It seems logical: more guests = more profit. But reality hits differently. The moment your restaurant really gets busy, things happen that eat away at your profit:
- Your chef gives larger portions to work faster
- Expensive ingredients get used more often because you don't have time to find alternatives
- More staff means higher labor costs
- Waste increases due to time pressure
💡 Example:
Restaurant with 80 covers per evening does €120,000 revenue per month. At 100 covers, revenue rises to €150,000, but:
- Food cost rises from 30% to 36% due to larger portions
- Labor costs rise from €25,000 to €35,000 due to extra staff
- Energy costs rise from €3,000 to €4,200
Result: profit drops from €26,000 to €21,300
Where exactly your margin is leaking
The biggest leaks happen due to lack of control during busy moments:
Portion size creep
Your chef is in a hurry. Instead of 180 grams of steak, he gives 220 grams. You lose €2.40 per portion. With 300 steaks per month: €720 in extra costs.
⚠️ Watch out:
Many kitchens don't have portion scales. Chefs estimate portions by eye, especially during the rush. This can increase your food cost by 5-8 percentage points.
Expensive ingredients as standard
During busy service, your team reaches for what's available. Out of fresh garlic? Then use the expensive dried version. Out of butter? Then use the premium butter at €18/kg instead of €12/kg.
Waste due to time pressure
Hurrying leads to mistakes. Vegetables cut wrong, burnt sauces, dropped plates. I've seen restaurants lose a mistake that costs the average restaurant EUR 200-400 per month through these invisible costs that can eat up 3-5% of your revenue.
💡 Example calculation:
At €150,000 monthly revenue, 4% extra waste means:
- Extra costs per month: €6,000
- Per year: €72,000
- That's more than a full-time employee costs
The hidden labor cost increase
More guests means not just more staff, but also more expensive hours:
- Overtime costs 150% of the normal rate
- Hiring extra staff often costs 20-30% more than permanent staff
- Stress leads to more sick leave and replacement costs
Why you don't see this in your numbers
The problem is that these costs rise gradually. Your food cost goes from 30% to 32%, then to 34%. It doesn't feel like a crisis, but it eats away at your profit.
💡 Impact calculation:
Restaurant with €500,000 annual revenue:
- Food cost rises from 30% to 35% = €25,000 less profit
- Labor costs rise from 28% to 32% = €20,000 less profit
- Total: €45,000 less profit per year
That's almost €4,000 per month that melts away
How to stop this
The solution lies in systematic control, even during busy moments:
Daily food cost monitoring
Check your food cost from yesterday every morning. If it's above your target, find out why. Was it busier? Larger portions? More waste?
Enforce fixed portion sizes
Use portion scales and spoons with fixed measures. Train your team to use the correct amounts even during the rush.
Real-time insight into costs
With a food cost calculator like KitchenNmbrs, you see immediately if your food cost deviates from your target. This way you can intervene before it melts away over a month.
⚠️ Watch out:
Controlling doesn't mean distrusting. Explain to your team why portion management is important for the survival of the business. Make it part of the routine, not part of the stress.
How do you stop margin loss? (step by step)
Measure your current food cost per dish
Calculate what the ingredients cost for your 5 best-selling dishes. Divide this by your selling price excl. VAT and multiply by 100. This is your baseline to measure deviations.
Set fixed portion sizes
Determine the exact amount per ingredient for each dish. Provide scales and measuring cups in the kitchen. Train your team to use these, even during busy moments.
Monitor your deviations daily
Check every morning whether your food cost from yesterday falls within the target. For deviations, find the cause: more guests, larger portions, or more waste? Adjust immediately where needed.
✨ Pro tip
Track your busiest 3 hours each evening and calculate the exact food cost percentage for just those peak hours over the next 14 days. You'll discover your margin bleeds most between 7-10 PM when pressure peaks.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
Was this article helpful?
Frequently asked questions
How can I check if my portions are too large?
Weigh 5 random portions of the same dish during a busy service. If these deviate more than 10% from your standard, you're losing money. Train your team to use scales and measuring tools consistently.
What is a normal food cost for a busy restaurant?
A typical food cost is between 28-35%, regardless of how busy you are. If you're above 35% during busy periods, you're giving too large portions or have too much waste.
How much can I lose per year due to poor portion control?
At a restaurant with €500,000 annual revenue, 5 grams extra meat per portion can cost you €15,000-25,000 per year. This depends on how many meat dishes you sell and your portion frequency.
Should I use less staff to save costs?
No, too little staff leads to more mistakes and waste. Make sure you have enough staff, but do monitor whether your labor costs stay in proportion to your revenue.
How often should I check my food cost?
Check your total food cost daily and per dish weekly. For large deviations (more than 2 percentage points), find the cause immediately and adjust your processes.
Can't I just raise my prices if my costs increase?
Raising prices is an option, but customers notice this quickly. Getting your costs under control first is more effective and preserves your competitive position in the market.
📚 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.
Stop losing money in your kitchen
Most restaurants lose 5-15% margin due to invisible mistakes. KitchenNmbrs makes every euro visible — from purchase to plate. Start your free trial and discover where your money is leaking.
Start free trial →