A seated wedding dinner for 100 guests requires twice the staff of a buffet, but buffets need 15% more food to prevent running out. These cost differences mean your margin calculation changes completely between formats. Here's how to price each service style for maximum profitability.
The difference in cost structure
Catering costs split into food, service, transport, and setup. But the format determines everything - from analyzing actual purchasing data across different restaurant types, buffets consistently need fewer staff hours while seated dinners require more precise portion control.
💡 Example cost structure:
Wedding buffet (80 people):
- Food: €25 per person
- Staff: 2 people × 6 hours × €25 = €300
- Transport + materials: €200
Seated dinner (80 people):
- Food: €28 per person
- Staff: 4 people × 8 hours × €25 = €800
- Transport + materials: €300
Food cost calculation per format
You'll calculate food cost per person, not per plate. Buffets need 10-15% extra purchasing for waste and safety stock.
⚠️ Note:
Buffet guests take more than table service portions. Add 15% extra food for safety - running short kills your reputation.
The formula remains: Food cost % = (Ingredient costs / Selling price per person excl. VAT) × 100
Staff and service costs
Here's where buffet and seated service costs diverge dramatically:
- Buffet: 1 person per 40-50 guests for setup and service
- Seated dinner: 1 person per 20-25 guests for table service
- On-site kitchen: Hot dishes often need 1 extra chef
💡 Margin calculation example:
Wedding buffet 80 people at €45 excl. VAT:
- Revenue: 80 × €45 = €3,600
- Food: €25 × 80 × 1.15 = €2,300
- Staff: €300
- Other: €200
- Total costs: €2,800
Margin: €3,600 - €2,800 = €800 (22%)
Include hidden costs
These forgotten cost items destroy margins:
- Transport: Fuel, wear and tear, driving time
- Materials: Warming pans, dishes, decoration
- Setup/breakdown time: Usually 2-3 hours of extra labor
- Insurance: Liability coverage outside your location
Passing costs through to selling price
Healthy catering margins follow these percentages:
- Food: 35-45% of selling price
- Staff: 25-35% of selling price
- Other costs: 10-15% of selling price
- Profit: 15-25% of selling price
💡 Minimum price calculation:
If your total costs per person are €35 and you want 20% margin:
Minimum price = €35 / 0.80 = €43.75 excl. VAT
Menu price: €43.75 × 1.09 = €47.69 incl. VAT
Digital support for catering
Catering cost calculation beats restaurant complexity every time. You've got different cost items changing per event. A food cost calculator like KitchenNmbrs tracks all your cost items per person, so you can quickly calculate minimum event revenue requirements.
How do you calculate the margin on catering? (step by step)
Calculate your food cost per person
Add up all ingredient costs and divide by number of people. For buffet, add 15% extra for waste. For seated dinner, calculate exactly according to recipe.
Calculate staff and service costs
Buffet: 1 person per 40-50 guests. Seated: 1 per 20-25 guests. Multiply by hourly wage and total working time including setup/breakdown.
Add transport and material costs
Calculate fuel, material transport, and any rental of extra dishes/equipment. Divide by number of people for cost price per guest.
Calculate total cost price and desired margin
Add up all costs per person. For healthy margin, divide by 0.75-0.80 (= 20-25% profit). This gives you minimum selling price excl. VAT.
✨ Pro tip
Track your actual food waste percentages for the last 12 buffet events - many caterers over-order by 20-25% when 15% would suffice. This single adjustment can boost your buffet margins by 3-5 percentage points.
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
Why is buffet usually cheaper than seated dinner?
Buffets need less staff (1 per 40-50 guests vs. 1 per 20-25 guests) and fewer service-intensive tasks. This cuts staff costs by 30-40%.
How much extra food should I add for a buffet?
Add 15% extra food for buffets. Guests take larger portions and you can't afford to run out. This prevents disappointed guests and maintains your reputation.
What if fewer guests show up than expected?
Build 5-10% no-show risk into your pricing structure. Or negotiate agreements about minimum guest counts with surcharges for cancellations within 48 hours.
How do I calculate transport costs per person?
Factor €0.35-0.50 per kilometer for fuel and vehicle wear. Add loading, unloading, and driving time at your hourly rate, then divide total transport costs by guest count.
Do buffets really need 15% extra food every time?
Yes, especially for popular dishes like carved meats or desserts. Guests don't self-regulate portions like servers do, and running out of signature items damages your reputation more than food waste costs.
Should I price buffets and seated dinners with the same profit margin?
Seated dinners can command 5-10% higher margins due to perceived premium service. But buffets often have better actual margins due to lower labor costs despite the extra food requirements.
📚 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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