Restaurant Cost Control for Beginners: Food Cost, Prime Cost and a Weekly Routine

The accountant's month-end numbers land, food cost is a few points higher than you hoped, and nobody in the kitchen can say why. By then the month is over. What works is a smaller, earlier habit: compare what you spent on food and labor with what you sold, counted the same way every week. Two figures carry most of it. Food cost percentage is the food you used divided by food sales. Prime cost is food plus labor, divided by sales. A short weekly count of your priciest items, checked against what the kitchen should have used, shows you a leak while there's still time to fix it.

Two numbers to know before anything else

Food cost percentage is the value of the food you used in a period divided by your food sales for the same period. Food used is opening stock plus purchases minus closing stock, so you need a stock count at the start and end of every period. Skip it and you're dividing invoices by sales, which only tells you what came through the back door, not what left the kitchen.

Prime cost is the cost of the food and beverages you used plus labor, meaning wages and the payroll costs on top. Divide that total by sales and you have prime cost percentage. For many restaurants these are the two biggest lines, and they're the ones you can actually push around. Rent and insurance get paid whether you serve 40 covers or 400. Food and most hourly labor move with the business, so that's where your attention pays back.

The month below is made up to show the arithmetic. Treat the figures as illustration, not a benchmark.

What a three-point gap costs, worked through

Say food sales are $50,000, opening stock is $6,000, purchases are $16,500 and closing stock is $5,500. Food used comes to $17,000, so food cost is 34%. If the menu was priced to run at 30%, you should have used $15,000. That $2,000 difference comes back every month, $24,000 over a year, and it never shows up as one bill you could point at.

Your own target has to come from your own menu. Price each dish, decide what share of the price the ingredients are allowed to take, and test that against your count. A pastry counter and a steakhouse won't land on the same percentage, so a number copied from another business tells you little.

Finding where the gap comes from

A percentage says something is off, not what. To narrow it down, compare what the kitchen should have used (units sold times recipe quantity) with what it really used. The usual suspects are portions that creep up over time, trim and prep waste, short or wrong deliveries nobody checked at the back door, and comps or staff meals that never got rung in.

You don't have to count the whole storeroom every week. Pick the ten or so items that cost you the most, such as proteins, seafood, cheese and good oil, and count just those, on the same day and at the same hour, before the delivery goes on the shelf. When that habit holds, widen the list. Keep a full count monthly so the percentage stays honest.

Cost every plate, then look at the menu

A recipe card with exact quantities and an honest yield (what's left after trimming and cooking) gives you the cost per plate. Divide that by the menu price and you get the dish's own food cost percentage. It's worth doing once for every dish, because a dish priced before the last supplier increase may well be earning less than you think.

Then set cost next to sales. A dish that sells well on a thin margin needs a price check or a smaller portion. A dish with a good margin that nobody orders needs a better description or photo, or a spot off the menu. FineDine's Item Report shows units sold and revenue per item, and FineDine IQ has a Menu Performance tab, so the sales half of that comparison is easy to pull. Plate cost itself you'll have to work out on your side, because nothing in the panel calculates it.

Suppliers, ordering and stock that sits

Keep a plain price log for your top items, with the date and supplier on each line, and read it before every order. When a price jumps, ask a second supplier for a quote the same day. A small place can do well with a standing arrangement with one supplier, as long as you still check the others now and then.

Ordering to a par level, meaning the amount you need to last until the next delivery, cuts two losses at once: running out on a busy night and binning what you over-bought. How fast your stock turns over tells you whether you're over-buying, and What's Inventory Turnover Ratio and How Can You Perfect It? walks through that calculation.

Labor and fixed costs

Labor is the other half of prime cost, and it gets less attention than it should because the schedule is written before the week happens. For a few weeks, put scheduled hours next to covers or sales for each day. You may well find a shift that's regularly overstaffed, or one that's always short. Fixed costs rarely respond to weekly effort, so go through them at renewal time: insurance, utility contracts, and any subscription nobody uses anymore.

What software can and can't do here

Some tools count stock and cost recipes, and if that's what you need, look for one built for it. FineDine is a digital menu and ordering platform, and its panel has no screen for purchases, stock levels or ingredient costs, so it won't give you a food cost percentage. What it does give you is the sales side: which items sell, what they bring in, and where the menu needs work. FineDine also lets you change item prices in one place, which helps once you've decided a dish needs repricing.

A bookkeeper or accountant is still the right person for the month-end view and the accounting side of costs. The weekly count is better done by someone in the building, and if that's you, pick a second person who can do it when you're off.