Food waste costs an average restaurant between €8,000 and €15,000 per year. The problem isn't just what disappears in the trash bin, but especially products you buy but never use. In this article you'll discover which products are wasted most often and how to prevent it.
The top 5 most wasted products
Research among 200+ restaurants shows a clear pattern. These products are thrown away most often:
- Fresh vegetables and salads (35% of all waste)
- Bread and bakery products (18%)
- Dairy products (15%)
- Fresh herbs (12%)
- Fish and seafood (10%)
💡 Example:
Restaurant with 80 covers per day, 6 days per week:
- Lettuce thrown away per week: 3 kg at €4/kg = €12
- Leftover bread per day: 8 rolls at €0.40 = €3.20
- Parsley spoilage: 2 bunches at €1.50 = €3
- Milk past date: 1 liter at €1.20 = €1.20
Total per week: €19.40 = €1,009 per year on these 4 products
Why these products specifically?
These products have three properties that encourage waste:
- Short shelf life: Fresh vegetables and herbs go bad within 3-7 days
- Difficult to portion: You buy a whole bunch of parsley but only use half
- Seasonal fluctuations: Demand for salads drops in winter, but you buy the same amount out of habit
⚠️ Watch out:
Waste often happens unconsciously. You see the lettuce turning yellow, but you don't add up how much money disappears in the trash each week.
Hidden waste: what you don't see
Beyond visible waste (trash bin) there's invisible waste that costs even more:
- Overproduction mise-en-place: Too much salad washed, too much vegetables cut
- Oversized portions: Chef gives 200g vegetables when you calculate for 150g
- Cutting loss: From 1kg carrots you get 750g after peeling, but you calculate as if it's 1kg
- Staff meals: Team eats ingredients meant for guests
💡 Example of hidden costs:
You buy 5kg tomatoes every week at €3.50/kg:
- Purchase costs: €17.50
- Cutting loss (skin, seeds): 20% = €3.50
- Spoilage from storage: 15% = €2.63
- Overproduction salad: 10% = €1.75
Real costs: €25.38 instead of €17.50 (45% higher!)
Seasonal patterns in waste
Waste follows predictable patterns throughout the year:
- Winter: Salads and cold dishes are left over, soups and warm vegetables are popular
- Summer: Warm dishes are ordered less, fresh fish spoils faster in heat
- Holidays: You order extra, but guests order different dishes than expected
- Vacation periods: Fewer guests, but you buy the same amounts out of routine
Impact on your food cost
Waste increases your actual food cost without you noticing. If you calculate 30% food cost, but 12% of your purchases disappear, your real food cost is 34.1%.
💡 Calculation:
Restaurant with €8,000 monthly purchases:
- Planned food cost: 30%
- Waste: 12% of purchases = €960
- Actual ingredient costs: €8,000 + €960 = €8,960
- Actual food cost: €8,960 / €26,667 revenue = 33.6%
You lose 3.6 percentage points margin due to waste
First steps to reduce waste
Start with these three actions that deliver immediate results:
- Track everything you throw away for one week: Weigh what goes in the trash each evening and note the value
- Check your top 5 best-selling dishes: How much of each ingredient do you actually use per portion?
- Create a FIFO system: First In, First Out - always use the oldest products first
⚠️ Watch out:
Measure first before taking action. Many business owners think they waste little, but the numbers often show 10-15% waste of total purchases.
Digital tools for waste control
Apps like KitchenNmbrs help you track:
- Exact ingredient costs per dish (including waste percentage)
- Inventory values and expiration dates
- Weekly waste reports
- Seasonal patterns in your purchases vs. sales
The goal isn't zero waste - that's unrealistic. But reducing from 12% to 6% waste saves an average restaurant €6,000 per year.
How do you measure waste in your kitchen? (step by step)
Weigh and record all discarded food
Place a scale by the trash bin. Record each evening what was thrown away and the estimated value. Do this for at least one week to get a realistic picture.
Categorize waste by cause
Divide waste into: spoilage (past date), overproduction (too much prepared), cutting loss (peels, bones) and plate waste (guests leave behind). Each category requires a different approach.
Calculate the percentage of your total purchases
Divide the total waste value by your weekly purchase amount and multiply by 100. Above 8% there's room for improvement, above 15% you're losing significant money.
✨ Pro tip
Take photos of your trash bin before emptying it. After a month you'll see patterns: which products come back most often and on which days. This helps with better purchase planning.
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 waste is normal in a restaurant?
A typical percentage is between 5-12% of total purchases. Below 5% is excellent, above 15% means you're probably losing a lot of money to avoidable waste.
Should I count cutting loss as waste?
Cutting loss (peels, bones, fat) is not waste but part of your cost price. Add 15-25% extra to your purchase price for this. Only if you throw away more than normal cutting loss is it waste.
How do I prevent fresh herbs from spoiling?
Buy fresh herbs only for specific dishes you're making that week. Store them like flowers in water in the cooler. Consider dried herbs for dishes ordered less frequently.
Can I include waste in my cost price calculation?
Yes, add 5-8% extra to your ingredient costs for normal waste. At €10 ingredient cost this becomes €10.50-€10.80. This prevents waste from unexpectedly hitting your margin.
What should I do with plate waste from guests?
Plate waste indicates oversized portions or poor taste. If more than 20% of a dish comes back, reduce the portion or adjust the recipe. This saves ingredients and improves guest experience.
📚 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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