Calculating and monitoring food cost: how to stay in control of your margin

A dish that sells well on paper can still run at a loss if food cost gets out of hand. If you only look at profit at the end of the month, you discover an inflated buying price only once the margin's already gone. This article shows how to calculate the cost price per dish, what food cost percentage is healthy for catering, and how to keep an eye on your margin before a quote ever goes out the door.

What food cost actually is, and why it's more than just an accounting number

Food cost is the percentage of your selling price that goes on buying ingredients. Charge €18 for a main course and the ingredients cost €6, and your food cost sits at 33%. On paper, that often looks healthy. The problem is that food cost almost never stays stable: vegetables get pricier in winter, a supplier quietly raises its prices, and a portion that's plated up a touch more generously eats into your margin without anyone noticing.

If you only look at food cost after the fact, based on the month's total purchase invoice, you mostly see the result. Not the cause. To actually get a grip on it, you need to be able to work it out at the level of the individual dish.

How to calculate the cost price per dish

The basics are simple: add up the buying price of every ingredient in the exact quantity the recipe calls for.

• 200 grams of chicken: €1.60
• 150 grams of vegetables: €0.90
• Sauce, herbs, garnish: €0.50
• Total cost price per portion: €3.00

Sell that dish for €12.00, and your food cost percentage is 25% (€3.00 divided by €12.00, times 100). The formula always stays the same:

Food cost % = (ingredient cost per portion ÷ selling price per portion) × 100

Do this calculation per dish, not just for the whole menu. One popular dish with too low a margin can eat into the profit of three other dishes without it showing up in your overall total.

What percentage is healthy in catering?

In catering, a healthy food cost usually sits between 25 and 35%, depending on the type of event and the style of service.

• Walking dinner and canapés: often 20 to 28%. More labour-intensive to prepare, so lower ingredient costs are needed to make the margin work.
• Plated dinner service: 28 to 33%. More service included in the price, so a slightly wider food cost margin is acceptable.
• Buffets: plan for 30 to 35%. Larger quantities and more variety raise the risk of leftovers and overestimated portions.

These figures are guidelines, not law. What matters most is knowing where you stand, per dish and per event type, instead of guessing.

Where food cost quietly slips away

Most food cost problems don't start when you put the quote together, they start in what happens afterward:

• Buying prices that keep rising between the moment of quoting and the actual buying in, without the selling price moving along with it.
• Portioning that drifts from the recipe, because the kitchen plates up by feel instead of by weight.
• Leftovers and waste that don't get counted as a cost, while they genuinely cost money.
• Menu changes for the client (an extra sauce, a pricier side) that don't get passed on in the quote.

Each of these points is small on its own. Added up over a whole season, they can make the difference between a healthy margin and a catering business that's busy but barely has anything left over.

Keeping an eye on food cost without it becoming a full-time job

Caterers who really keep food cost under control do two things differently from the rest. First, they work out the cost price per dish properly once, then update it as soon as a buying price changes, instead of manually recalculating every quote from scratch. Second, they link that cost price directly to the quote, so when they're putting a menu together, they see straight away which dish is dragging the margin down and which one is giving them room.

That doesn't have to be a complicated process. A simple overview per dish, with cost price, selling price and food cost percentage side by side, is already enough to spot patterns: which dishes you should be recommending more, and which ones are better off repriced or taken off the menu.

Frequently asked questions

What's a healthy food cost percentage for a catering business?

For most caterers, a healthy food cost sits between 25 and 35%, depending on the type of event. Walking dinners and canapés tend to run lower, buffets with a lot of variety and volume tend to run higher. More important than a fixed number is knowing where you stand per dish.

Should I calculate food cost per dish or per menu?

Ideally both, but start per dish. An average food cost percentage across a whole menu can hide the fact that one popular dish barely makes any margin, while another dish is covering for those losses. Without that detail, you won't know which dish needs repricing.

How do I deal with fluctuating buying prices?

Update the cost price of your regular dishes periodically, for example monthly or whenever a supplier makes a big price change. For dishes with ingredients that swing a lot (fish, some vegetables), you can build in a small buffer so small price rises don't immediately put you in the red.

Does labour count towards food cost?

No, food cost is specifically about the cost price of ingredients. Staff costs, equipment hire and transport get worked out separately in your overall cost build-up and final quote, but they don't belong in the food cost percentage itself.

How do I stop waste from throwing off my food cost?

Track for a few weeks how much you're actually throwing away per dish and compare that to your planned portions. Waste often turns out to be a portioning issue: the kitchen is consistently preparing or plating up a bit more than the recipe calls for. Adjusting the portion size usually fixes it faster than buying in more strictly.

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