What Kitchen Staff Training Costs You When You Skip It
TL;DR: Food cost management for new head chefs starts with one number: your food cost percentage. Keep it in range, track your spend weekly, and treat the numbers like you treat the pass. Ignore them and someone else will notice before you do.
Food cost management for new head chefs is the part of the job nobody warns you about properly, and if you are not across it within your first few weeks, you will feel it in ways that have nothing to do with cooking.
I remember the first time I was handed a P&L sheet as a newly appointed head chef. I stared at it the way you might stare at a parking ticket written in Portuguese: aware that it was significant, entirely unsure what to do next. My food was good. My team liked me (mostly). My food cost percentage, it turned out, was sitting at 38%, which is the kind of number that makes a restaurant owner go very quiet and very still.
Nobody had taught me. Not really. I had been taught to cook. I had been taught to lead a section, to plate a dish, to keep the pass moving. But the numbers? Those were someone else’s department. Until, suddenly, they were not.
The moment you take the head chef role, the kitchen’s financial performance becomes your responsibility whether you asked for it or not. That is not a complaint, it is just how it works. Owners and general managers will tolerate a lot of things. Persistent over-spend on food is not usually one of them.
Food cost is the percentage of your revenue that you spend on ingredients. If your kitchen takes £10,000 in food revenue during a week and you spent £3,000 on ingredients, your food cost percentage is 30%. The target varies by operation, but most kitchens aim somewhere between 25% and 32% depending on their model. Fine dining can afford to sit higher because margins are built differently. A pub kitchen running at 38% is quietly losing.
The reason this matters is simple: food cost is the single biggest variable cost you can actually control. Labour is mostly fixed. Rent is fixed. Gas is roughly fixed. But what you buy, how you use it, and how much you throw away? That is yours to manage.
Understanding food cost percentage does not require an accounting qualification. It requires you to stop treating the numbers as someone else’s language and start treating them as feedback on your kitchen.
The formula is straightforward. Divide your ingredient spend by your food revenue, then multiply by 100. That gives you your food cost percentage. Do it weekly, not monthly. Monthly figures tell you what went wrong four weeks ago. Weekly figures let you correct course before it compounds.
What tends to surprise new head chefs is how many things quietly push that percentage upward without anyone noticing. Portion drift is one. A chef who plates 240g of protein instead of 200g because it ‘looks better on the pass’ is a chef who just added cost to every cover without adding a penny of revenue. Over a week, across a busy service, that adds up to a figure that will make your next P&L conversation uncomfortable.
Menu costing for chefs means pricing every dish from the bottom up: knowing what every component costs per portion before the dish goes on the menu. Not guessing. Not using last year’s costs because they were roughly right. Costing each dish properly, with current supplier prices, and revisiting those costs when prices shift.
It is tedious work. I will not pretend otherwise. But a dish you have not costed is a dish you are gambling on, and kitchens do not win that bet often enough to make it a strategy.
The practical approach is to build a simple recipe card for each dish. List every ingredient, the quantity used per portion, and the price per unit from your supplier invoices. Add those costs together. That is your raw ingredient cost. Divide it by your menu price and multiply by 100 to get the dish’s food cost percentage. If that number is above your target, you either adjust the dish, adjust the portion, or adjust the price. Three options. Pick one.
Gross profit in catering is the money left after you subtract your food cost from your food revenue. It is not your profit as a business, because you still have wages, rent, and utilities to pay from that gross figure. But it is the number that tells you whether your kitchen is generating enough to sustain itself before those fixed costs bite.
A kitchen with a 70% gross profit margin has £70 of every £100 in food revenue left after ingredients. That £70 has to cover labour, overheads, and whatever remains is actual profit. A kitchen at 60% gross profit has considerably less room to manoeuvre, and a kitchen at 55% is likely running at a loss once everything else is accounted for.
Understanding this relationship changes how you think about menu design. A dish with expensive ingredients but a high sale price can sit on the menu. A dish with cheap ingredients and a high sale price is the one you want to sell as often as possible. A dish with expensive ingredients and a low price is costing you money every time it goes out. These are not abstract ideas, they are decisions you can make on Monday morning.
Kitchen budget control starts with your ordering, not your cooking. Most kitchens overspend at the point of purchase, not at the point of service. Over-ordering is a very common habit among chefs who are anxious about running out of something. Running out is embarrassing. Throwing food away is expensive. Both are problems, but only one of them happens every single week in kitchens that are not paying attention.
Food waste reduction in professional kitchens is partly a values question and partly a maths question. On the values side: it is difficult to claim any serious commitment to good food if you are binning 15% of what you buy. On the maths side: every kilogram of usable food that ends up in the bin is food you paid for and earned nothing from.
A few things that actually work in a real kitchen, not in a management workshop:
Your chefs are not trying to cost you money. They are trying to cook well, which is what you hired them to do. The problem is that nobody ever sits them down and explains that portion control and food cost are connected to whether the kitchen keeps its staff or starts cutting shifts.
Be direct with your team without being grim about it. Tell them what your food cost target is. Tell them how their portioning affects it. Show them a dish cost card. Most good cooks respond well to being treated as professionals who can understand numbers rather than as children who need to be kept away from the business side of things.
One useful habit: put food cost on the pre-service briefing once a week. Not every day, that becomes white noise. But a brief mention of where you finished last week and what you are aiming for this week keeps it present without making the whole kitchen feel like a spreadsheet exercise.
Most full-service restaurant kitchens aim for a food cost percentage between 25% and 32%. Fast-casual and high-volume operations often target the lower end. Fine dining kitchens may run higher because their average spend per cover allows for it. What matters is that your food cost percentage is consistent with your overall business model, not simply low for its own sake.
Weekly. Monthly reviews give you historical data but very little ability to correct course in time for it to matter. A weekly food cost calculation takes roughly 20 minutes once you have a system in place, and it tells you immediately if something has gone wrong with your ordering, your portioning, or your waste.
Food cost percentage is the proportion of your food revenue spent on ingredients. Gross profit margin is what remains after that ingredient spend, expressed as a percentage of revenue. If your food cost percentage is 30%, your gross profit margin on food is 70%. Both figures matter; food cost tells you what you are spending, and gross profit tells you what you have left to work with.
Start with your ordering rather than your cooking. Most food waste originates from over-purchasing, not from bad technique. Once your ordering is disciplined, look at how you use trim and offcuts, and make sure your storage and rotation is rigorous. Quality rarely suffers when waste is reduced through better organisation. It suffers when chefs are asked to use ingredients that are past their best because they were not rotated properly in the first place.
Yes, without question. Chefs who understand the financial context of their kitchen make better daily decisions. You do not need to share the full P&L, but sharing your food cost target and explaining how portioning and waste connect to it gives your team the information they need to help rather than inadvertently hinder.
The question worth sitting with is this: if you do not know your food cost percentage right now, today, what else in your kitchen are you running on instinct that would be better run on information?
Chef Ian McAndrew’s specialist eBooks and guides are available directly on ChefYesChef, including his technical titles and autobiography. If you want more practical, chef-led reading beyond this article, you’ll find the full collection here.
Chef Ian McAndrew works with chefs, businesses, and individuals on a wide range of culinary projects, from concept development to practical problem-solving.
If you’d like to talk through an idea or need informed guidance, you’re welcome to contact him.
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