I'll be honest: waste costs catering companies an average of 8-15% of their revenue, while restaurants typically sit around 5-10%. The difference lies in how they operate: catering must estimate how many people will attend in advance, restaurants can adjust during service. Here's exactly how to calculate what waste costs you in both situations.
Why catering has more waste
With catering you've got to decide in advance how much to prepare. Too little and your guests go hungry. Too much and you throw it away. Restaurants can adjust during the evening if something runs out.
💡 Catering example:
Wedding for 120 people, buffet €35 per person:
- Planned revenue: 120 × €35 = €4,200
- You prepare food for 130 people (buffer)
- Actual costs: 130 × €12 food cost = €1,560
- 115 people show up
Waste: 15 portions × €12 = €180 (4.3% of revenue)
Calculate three types of waste
Waste always has three sources. In catering and restaurants they work out differently.
1. Purchasing waste
This is what you throw away due to miscalculation or spoilage. Restaurants can reorder, catering must have everything prepared in advance.
- Restaurant: 2-5% of purchases (you can adjust)
- Catering: 5-12% of purchases (everything prepared in advance)
💡 Purchasing waste calculation:
Catering company, March:
- Total purchases: €15,000
- Thrown away due to spoilage/surplus: €1,200
- Waste %: (€1,200 / €15,000) × 100 = 8%
On annual basis: 8% of €180,000 purchases = €14,400 waste
2. Preparation waste
Cutting loss, incorrectly prepared items, accidentally burned food. With catering you often work with larger volumes, so mistakes cost more. And here's where I see a mistake that costs the average restaurant EUR 200-400 per month: not tracking prep waste by staff member or time of day.
- Formula: (Thrown away during prep / Total purchases) × 100
- Restaurant: 3-8% (smaller batches, more control)
- Catering: 5-15% (large volumes, time pressure)
3. Service waste
What's left over after service. This is where the big difference between restaurant and catering shows.
⚠️ Note:
With buffet catering you always need to prepare 10-20% extra. Otherwise the buffet looks bare. This 'presentation buffer' is automatic waste.
Calculate total waste per setting
Restaurant calculation
In a restaurant you add up all three sources and divide by your total revenue.
💡 Restaurant example (monthly):
- Revenue: €45,000
- Purchasing waste: €800 (spoilage, surplus)
- Preparation waste: €600 (cutting loss, mistakes)
- Service waste: €400 (what guests leave behind)
Total: €1,800 / €45,000 × 100 = 4% of revenue
Catering calculation
With catering you calculate per event and add up for a period. Note: you often deliberately prepare more than you sell.
💡 Catering example (event):
Corporate lunch 80 people, €25 per person:
- Revenue: 80 × €25 = €2,000
- Prepared for: 90 people (buffer)
- Food cost per person: €8
- Total food cost: 90 × €8 = €720
- Leftover: 10 portions × €8 = €80
Waste: €80 / €2,000 × 100 = 4% of revenue
Financial impact on annual basis
To see the real impact, you calculate for a full year. Catering often has higher peaks due to seasonal work.
- Restaurant (€500k revenue): 5% waste = €25,000/year
- Catering (€300k revenue): 10% waste = €30,000/year
Catering loses relatively more, despite lower revenue. The reason: less flexibility to adjust.
Where the biggest gains are
For both settings: focus on the biggest waste source first.
- Restaurant: Usually preparation waste (better portioning)
- Catering: Usually purchasing waste (better planning per event)
💡 ROI calculation:
Catering company invests in planning software:
- Software costs: €3,000/year
- Waste drops from 10% to 7%
- Savings: 3% of €300k = €9,000/year
ROI: €9,000 - €3,000 = €6,000 profit per year
A system like KitchenNmbrs helps track waste per event and calculate the real impact on your margins.
How do you calculate waste impact? (step by step)
Gather all waste data
Track for 1 month what you throw away: spoilage from purchasing, mistakes during prep, and what's left after service. Weigh everything and note the purchase value.
Calculate waste per category
Divide each category by your total purchases and multiply by 100 for percentages. Add all percentages together for your total waste.
Compare with revenue and benchmark
Divide total waste costs by your revenue for the percentage of revenue. Restaurant: aim below 6%, catering: aim below 12%.
✨ Pro tip
Track waste by event type and day of the week for 8 weeks straight. You'll discover Tuesday corporate lunches waste 3% less than Friday weddings, allowing precise buffer adjustments.
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 normal waste for catering?
Catering companies typically have 8-15% waste of their revenue. This is higher than restaurants because you have to estimate in advance how many people will attend and always need a buffer.
Should I count leftover buffet as waste?
Yes, everything you throw away after an event is waste. With buffets, 10-15% surplus is normal for presentation, but count it in your calculation.
How do I prevent waste with varying guest numbers?
Make agreements about final numbers at least 48 hours in advance. Calculate a fixed buffer (for example 5%) and factor this into your price per person.
What does waste cost an average catering company per year?
At €300,000 revenue and 10% waste this costs €30,000 per year. That's approximately 2-3 months of profit for an average catering company.
How often should I track waste percentages?
Track waste weekly for restaurants and per event for catering. Monthly analysis helps spot trends and seasonal patterns.
Can I reduce my catering buffer below 10%?
Not recommended for buffets - they'll look empty. For plated service, you can go as low as 5% if you have confirmed headcounts 24 hours prior.
Which costs more: overproduction or running out of food?
Running out costs more long-term through lost reputation and future bookings. But overproduction above 15% kills your margins fast.
📚 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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