How to Calculate Food Cost Per Head for Catering Events
Step-by-step guide to calculating your true cost per head for catering events. Includes worked example for a 40-cover dinner party, the food cost formula, and margin targets.
Published 27 February 2026 · Last reviewed 20 March 2026
The food cost formula for catering events
Knowing your exact cost per head is the difference between a profitable event and an expensive lesson. Every experienced caterer has a story about the booking where they quoted too low because they underestimated ingredient costs at scale.
The core food cost per head formula is:
(Total ingredient cost + Overhead costs) / Number of guests = Cost per head
That gives you your break-even point. To set your selling price, apply your target margin:
Cost per head / (1 - Target margin %) = Selling price per head
Most UK caterers target a gross margin of 60-70% on food alone. At 65% margin, a £12 cost per head becomes a £34.29 selling price per head. That sounds like a big markup, but once you factor in labour, travel, equipment, and waste, the net margin is typically 15-25%.
Worked example: costing a 40-cover dinner party
Here is a realistic costing for a 3-course dinner for 40 guests, broken down step by step.
Step 1: Cost each dish at original recipe yield
| Dish | Recipe serves | Ingredient cost |
|---|---|---|
| Butternut squash soup (starter) | 4 | £3.80 |
| Chicken supreme with dauphinoise (main) | 4 | £9.60 |
| Chocolate torte (dessert) | 8 | £6.40 |
Step 2: Scale to 40 guests
| Dish | Scale factor | Scaled cost |
|---|---|---|
| Butternut squash soup | 10x | £38.00 |
| Chicken supreme with dauphinoise | 10x | £96.00 |
| Chocolate torte | 5x | £32.00 |
| Total food cost | £166.00 |
Step 3: Add waste factor
Catering waste is typically 5-15%. For a sit-down dinner party with known guest numbers, 8% is reasonable:
£166.00 x 1.08 = £179.28
Step 4: Add overhead costs
| Overhead | Cost |
|---|---|
| Staff (1 assistant, 6 hours at £12/hr) | £72.00 |
| Travel (round trip) | £25.00 |
| Equipment hire (chafing dishes) | £40.00 |
| Packaging and sundries | £15.00 |
| Total overheads | £152.00 |
Step 5: Calculate cost per head
(£179.28 + £152.00) / 40 = £8.28 cost per head
Step 6: Apply margin to set selling price
At 65% gross margin:
£8.28 / (1 - 0.65) = £23.66 selling price per head
That gives you:
- Total revenue: £23.66 x 40 = £946.40
- Total cost: £331.28
- Gross profit: £615.12
- Profit per head: £15.38
CaterCost does this automatically.
Recipe costing, event pricing, and allergen tracking — built for UK micro-caterers.
Common mistakes that eat your margins
Forgetting to scale properly. A recipe for 4 does not simply multiply by 10. Seasoning, gelatine, and raising agents scale non-linearly. Over-ordering these is waste; under-ordering means last-minute supermarket runs at retail price.
Using retail prices instead of supplier prices. Always cost at your wholesale supplier rate. If you buy chicken breast at £5.50/kg from your supplier but used the Tesco price of £8/kg in your costing, your margin looks worse than it is. Conversely, if you cost at wholesale but end up buying emergency stock at retail, your margin is worse than planned.
Ignoring waste. A 10% waste factor on £166 of ingredients is £16.60. Ignore it, and that comes straight off your profit.
Not including your own time. If you are a sole trader, your labour is a cost. If you would pay someone else £15/hr to do the prep, that is what your time costs too. Exclude it from the costing and you are working for less than you think.
Food cost percentage benchmarks for UK caterers
Food cost percentage is a useful benchmark across different event sizes:
Food cost % = (Ingredient cost / Selling price) x 100
| Event type | Typical food cost % | Notes |
|---|---|---|
| Canape receptions | 20-28% | High markup, low ingredient volume per head |
| Sit-down dinners | 28-35% | Standard for private dining and weddings |
| Buffets | 30-38% | Higher waste factor, more volume needed |
| Market stall servings | 25-32% | Per-portion pricing, lower overheads |
If your food cost percentage is above 40%, either your ingredient costs are too high or your selling price is too low. Below 25% on a sit-down dinner may mean portions are too small or ingredient quality is lower than the price suggests.
Try the free calculator
Working through this formula manually for every event takes time. Use our free catering cost per head calculator to run these numbers in minutes. Enter your dishes, set guest count and margin, and see your cost per head and suggested selling price instantly.
For recipe-level scaling, the recipe scaling calculator handles ingredient quantity adjustments and cost recalculation from one recipe serving size to any guest count.
If you produce any pre-packed food at events (wrapped platters, boxed meals), you also need to track allergens across every ingredient. Our PPDS labelling guide covers what Natasha's Law requires and how to build an allergen matrix for your menus.
Sources
This guide covers food costing for UK-based caterers. It does not constitute financial advice. Always confirm ingredient prices with your suppliers before committing to a client quote.