Money leaks in your restaurant drain profits silently, just like a dripping faucet you can't hear. Most restaurant owners sense profit slipping away but can't pinpoint the exact sources. Here's how to identify your three biggest money drains and track them weekly.
The three biggest money leaks in restaurants
Not all money leaks drain your profits equally. Focus on these three major culprits:
- Food cost too high - Above 35% you're losing money per plate
- Uncontrolled trim loss - Can cost you an extra 10-20%
- Waste - Food that goes in the trash
💡 Example:
Restaurant with €30,000 monthly revenue:
- Food cost of 38% instead of 30% = €2,400 loss
- Uncontrolled trim loss 15% = €1,350 loss
- Waste 5% of purchases = €570 loss
Total leak: €4,320 per month
Step 1: Map out food cost per dish
Begin with your five bestsellers. These dishes determine 80% of your profit or loss.
For each dish, include:
- All main ingredients
- Garnishes and sauces
- Oil, butter, spices
- Everything that goes on the plate
Calculate food cost using this formula:
Food cost % = (Ingredient costs / Selling price excl. VAT) × 100
💡 Example: Steak calculation
Menu price: €32.00 incl. 9% VAT
- Selling price excl. VAT: €32.00 / 1.09 = €29.36
- Steak 200g: €6.40
- Vegetables and garnish: €2.80
- Sauce and butter: €1.20
Food cost: (€10.40 / €29.36) × 100 = 35.4%
⚠️ Important:
Always calculate with the price excl. VAT. Your menu shows prices including VAT. This creates a 3-4 percentage point difference in food cost calculations.
Step 2: Measure trim loss and yield
Trim loss represents the gap between what you purchase and what actually reaches the plate. This factor gets underestimated frequently.
From tracking this across dozens of restaurants, your most expensive ingredients need the closest monitoring:
- Meat (from whole piece to portions)
- Fish (from whole to fillet)
- Vegetables (after peeling and cutting)
Calculate your real price per kilo:
Actual price = Purchase price / (Yield % / 100)
💡 Example: Salmon fillet
Whole salmon: €18.00/kg
- Weight whole salmon: 3 kg
- Weight after filleting: 1.8 kg
- Yield: 60%
Actual fillet price: €18.00 / 0.60 = €30.00/kg
Step 3: Track waste
Waste equals pure money thrown away. Monitor what gets discarded daily and identify the reasons.
Categories to measure:
- Spoilage - Kept too long, past expiration date
- Overproduction - Too much prepared
- Cooking mistakes - Failed dishes
- Returns - Guests not satisfied
💡 Example: Daily waste
Restaurant with 80 covers per day:
- Spoiled vegetables: €12
- Overproduced soup: €8
- 1 failed steak: €10
- Returned dish: €15
Daily loss: €45 = €1,350 per month
Set up a weekly control routine
Complete this check every Monday morning (takes 15 minutes):
Food cost check:
- Review prices of your 5 top dishes
- Check if suppliers have raised prices
- Recalculate food cost if prices changed
Trim loss check:
- Measure yield of 1 expensive product per week
- Compare with previous measurements
- Check if your chef cuts consistently
Waste analysis:
- Add up waste from the past week
- Look for patterns (which day, which product)
- Determine actions for the coming week
⚠️ Important:
Complete this check consistently, not just during suspected problems. Money leaks develop gradually and remain invisible without systematic monitoring.
Digital tools
Manual tracking consumes time and creates errors. Many restaurants use systems to:
- Calculate food cost automatically
- Update price changes immediately
- Track waste digitally
- Generate weekly reports
This approach saves hours of calculation time weekly and delivers more accurate data than Excel or paper records.
How to identify your money leaks? (step by step)
Measure your current food cost
Calculate the food cost of your 5 best-selling dishes. Add up all ingredients and divide by the selling price excl. VAT. Anything above 35% is a potential leak.
Check your trim loss
Weigh your most expensive products before and after processing. Calculate the yield and actual price per kilo. Many restaurants lose 10-20% here without realizing it.
Record daily waste
Keep track for a week of what gets thrown away and why. Add up the value. This gives you insight into your biggest waste sources.
Set up weekly monitoring
Schedule 15 minutes every Monday morning to check your three money leaks. Compare with the previous week and set actions for the coming week.
✨ Pro tip
Track your waste by specific 2-hour time blocks during your first month - you'll discover if leaks happen during prep, service, or closing. Most restaurants find 60% of waste occurs during the final 2 hours before close.
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
How much time does it take to check money leaks weekly?
About 15 minutes per week once you establish a system. The initial setup takes longer because you need baseline measurements, but it becomes routine quickly.
What is an acceptable waste percentage?
Between 2-4% of total purchases is normal for most restaurants. Above 5% indicates structural issues with planning, storage, or portion control.
Do I need to check all dishes or just the popular ones?
Start with your 5 bestsellers since they drive 80% of profit impact. Once you've optimized those, expand to other menu items gradually.
How often do suppliers change their prices?
Typically 2-4 times yearly, often in January and September. Check purchase prices monthly, especially after holiday periods when market fluctuations occur.
Should I include labor costs in my food cost calculations?
No, food cost percentages traditionally exclude labor. Labor gets tracked separately as a percentage of sales, typically targeting 25-35% depending on service style.
What if my trim loss seems higher than industry standards?
Train your prep cooks on consistent cutting techniques and proper knife skills. Sometimes switching suppliers or buying pre-portioned items makes financial sense despite higher unit costs.
Can seasonal menu changes affect my money leak tracking?
Absolutely - seasonal ingredients have different yields and costs. Recalculate your top dishes whenever you change suppliers or switch to seasonal alternatives.
📚 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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