Collecting daily waste data is one thing, taking action on it is another. Many hospitality entrepreneurs dutifully record what goes in the trash, but then do nothing with it. With a simple two-week approach you can see results immediately: less waste means more profit.
Why two weeks is the ideal period
Two weeks is long enough to recognize patterns, but short enough to see results quickly. You'll capture two weekends (often with different waste patterns) and can adjust immediately if something isn't working.
💡 Example:
Restaurant The Golden Spoon tracked 14 days:
- Monday to Wednesday: lots of fresh vegetables left over
- Thursday to Saturday: mainly bread and garnishes
- Sunday: complete plates coming back
Pattern: over-purchasing for quiet days, wrong portion sizes on weekends
The three main waste categories
Divide your waste data into three groups to take targeted action:
- Purchasing waste: Products that spoil before use
- Preparation waste: Over-prepped items, incorrectly cut, failed dishes
- Plate waste: What guests leave behind
Each category requires a different approach. Purchasing waste is solved with better planning, preparation waste with training, plate waste with smaller portions or better composition.
Week 1: Measure and recognize patterns
The first week is purely data collection. Note every day:
- What went in the trash
- Estimated value (what the ingredient cost)
- Reason (spoiled, leftover, guest didn't finish)
- Time of day (lunch, dinner, after closing)
⚠️ Note:
Estimate the value realistically. Half a bell pepper you throw away didn't cost you €0.25 but €0.50 (you usually can't sell the other half).
Interim analysis after week 1
After seven days you can already see patterns. Create a simple top 5:
- Which 5 products do you throw away most often?
- On which days is waste highest?
- What is your biggest cost item (value × frequency)?
💡 Example calculation:
Lettuce is thrown away 4× per week, €3 each time:
- Per week: 4 × €3 = €12
- Per year: €12 × 52 = €624
- Just on lettuce!
That justifies action
Week 2: Implement first adjustments
Now you take concrete action for each top 5 waste item:
For purchasing waste:
- Order 20% less of the most wasted product
- Shift deliveries (e.g., Wednesday instead of Monday)
- Buy smaller units, even if the per-kilo price is higher
For preparation waste:
- Prep later in the day (fresher products)
- Create mise-en-place lists per expected number of covers
- Train kitchen staff on standard cutting sizes
For plate waste:
- Reduce portions by 10% (guests often don't notice)
- Ask guests if they want to finish everything
- Analyze which components are often left behind
Calculate the financial impact
Track how much you save. The formula is simple:
Savings per week = (Waste week 1 - Waste week 2) × 52
💡 Realistic example:
Bistro with €8,000 weekly revenue:
- Week 1 waste: €180 (2.25% of revenue)
- Week 2 waste: €140 (1.75% of revenue)
- Savings: €40 per week = €2,080 per year
That's more than a month's rent!
Avoid common mistakes
Three things that often go wrong with waste reduction:
- Cutting too drastically: Start with 10-20% less, not 50%
- Focusing only on costs: A sold-out dish earns nothing
- Not bringing your team along: Explain why you're doing this
The goal isn't zero waste (impossible), but conscious waste. Sometimes it's better to throw something away than to have a disappointed guest.
Digital support
Manual tracking works, but an app like KitchenNmbrs makes it easier to spot patterns and track trends. You can immediately see which days and products cost the most.
How do you implement savings within two weeks? (step by step)
Week 1: Measure everything you throw away
Note daily what goes in the trash, the estimated value, and the reason. Divide into three categories: purchasing, preparation, and plate waste. After seven days, create a top 5 of most wasted products.
Analyze patterns and choose 3 quick wins
Look at your top 5 and choose the three easiest to tackle. Usually these are: less purchasing of perishable products, smaller prep quantities, or 10% smaller portions of dishes that often have leftovers.
Week 2: Implement adjustments and measure again
Apply your three chosen measures and continue measuring daily. Compare week 2 waste with week 1. Calculate your savings and project it over a full year to see the impact.
✨ Pro tip
Start with your three best-selling dishes. If you reduce waste on those by 20%, you've already solved 60% of your problem without overhauling your entire menu.
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?
Common waste is between 4-8% of your total food purchasing. Anything above 10% is really too much and costs you hundreds of euros per month.
Do I need to weigh all waste or can I estimate?
Estimating is fine, as long as you're consistent. It's about recognizing patterns, not being precise to the gram. Weighing takes too much time in a busy kitchen.
What if my team forgets to record waste?
Start with yourself and one other person. Keep it simple: one notepad by the trash where everyone can write. Perfection isn't the goal, awareness is.
Can I completely prevent waste?
No, and that shouldn't be the goal. Zero waste often means sold-out dishes and disappointed guests. Aim for conscious, controlled waste of 4-6%.
What do I do with seasonal products that spoil quickly?
Buy smaller quantities more often, even if the per-kilo price is higher. A more expensive product you sell is always better than a cheap product you 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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