Prime Cost for Restaurants: What It Is and How to Track It

Food cost and labor are the two largest expenses most restaurants can actually influence week to week. Rent is fixed by a lease. Utilities move slowly. But food and labor move every shift. Prime cost puts them together so you can see, in one number, whether the two biggest levers are under control.

Dollar figures are illustrative examples.

The formula

Prime cost = cost of goods sold (food and beverage) + total labor cost

Express it as a percentage of total sales for the same period.

• Cost of goods sold means what you actually used: beginning inventory + purchases - ending inventory.
• Total labor means wages, salaries, payroll taxes and benefits, for all staff.

A worked example

One week, total sales $40,000.

That leaves 35% of sales to cover rent, utilities, insurance, marketing, repairs, loan payments and profit. Not much room, which is why operators watch this number closely.

What is a good number?

You will often see an industry rule of thumb that prime cost should be around 60% to 65% of sales or lower. Treat that as a rough guide only. I have not verified it against a primary source, and quick-service, full-service and fine dining differ. Use your own history as the real benchmark, and watch the direction.

Why track it weekly

Because the two parts can hide each other. Food cost may fall while labor rises, and the monthly average looks fine. A weekly view lets you spot a sales dip (which pushes both percentages up if costs are fixed), an overstaffed shift pattern, or a creeping food cost.

Reading a rising prime cost

When the number climbs, ask which part moved.

1. Did sales fall? Fixed labor and prepped food cost a bigger share of a smaller number. The fix may be scheduling, prep levels or marketing, not cutting quality.
2. Did food cost rise? Check theoretical vs actual food cost, waste and supplier price changes.
3. Did labor rise? Look at overtime, scheduling against sales, and training or turnover costs.

The pressure is real right now. Restaurant365's 2026 mid-year survey of more than 420 operators found that 87% reported higher food costs and 77% reported higher labor costs in the first half of the year. More on responses in what restaurants can do about rising food costs.

Limits of prime cost

• It leaves out rent and other fixed costs, so a good prime cost does not guarantee profit.
• It is only as accurate as your inventory counts and payroll records.
• Salaried managers and owners' pay can distort comparisons; be consistent about how you include them.
• It says what happened, not why. You still need the detail beneath it.

Where software can help

The food half needs accurate counts and current costs. ChefMind AI's food cost tools cover food cost against a target; labor figures come from your payroll system. Put the two together weekly in a simple sheet.

The short version

• Prime cost = cost of goods sold + total labor, as a percentage of sales.
• Calculate it weekly, and compare to your own history.
• When it rises, find out whether sales, food or labor moved.
• It is a warning light, not a profit figure.