Restaurant Prime Cost: What It Is & How to Calculate It

Prime Cost = COGS + Total Labor Cost

That's the formula. Everything you spent on food and beverage, plus everything you spent on people, divided by sales. Full-service restaurants should land between 60% and 65% of sales. Quick service, 55% to 60%. Above 65%, the math stops working: what's left over can't cover rent, utilities, and insurance and still leave a profit.

To see what that looks like when it goes wrong: an owner on r/restaurantowners shared his weekly prime costs after taking over his family's 40-year-old restaurant: 88%, 91%, one week 111%. That week, he paid for the privilege of being open. Six months of cost controls and menu trimming later, he runs 67% to 80%. Still too high, but his sales didn't change. The costs did.

Getting from his situation to a healthy number starts with knowing exactly what goes into the calculation.

What counts as prime cost

Prime cost has exactly two components.

1. Cost of goods sold (COGS)

Every ingredient that left your kitchen or bar: food, beverages, plus the paper goods that go with them (pizza boxes, napkins, to-go containers). You calculate it from inventory counts:

COGS doesn't include one-time costs like equipment repairs or new barstools. Just what gets consumed; our restaurant COGS guide covers exactly what counts. If you want the full breakdown of the food side, our food cost percentage guide walks through it with three worked recipes.

2. Total labor cost

Not just hourly wages. Total labor means:

• Hourly wages for kitchen and front of house
• Salaries, including managers and yourself if you take one
• Payroll taxes
• Benefits, health insurance, workers' comp

Leaving out payroll taxes and benefits understates labor by 10-15%, which is enough to make a 64% prime cost look like a comfortable 59%.

What prime cost leaves out: rent, utilities, insurance, marketing, repairs. Those matter, but you can't do much about them this week. Prime cost is the part of your P&L you control with daily decisions, which is why it's the number to watch.

The prime cost formula

The dollar figure on its own means little. Divide by sales to get the percentage everyone benchmarks against:

A worked example

Say you run a full-service casual spot doing $24,000 a week in sales. You count inventory every Sunday night.

COGS:

• Beginning inventory (last Sunday): $11,400
• Purchases during the week: $8,200
• Ending inventory (this Sunday): $11,200

Labor:

• Hourly wages: $4,300
• Salaried manager (weekly portion): $1,300
• Payroll taxes and benefits: $1,000

Prime cost:

At 62.5%, this restaurant is inside the healthy range for full service, but with no room to drift. Every point of prime cost here is worth $240 a week, about $12,500 a year. Shave two points and you've added $25,000 to the bottom line without selling one extra plate.

What is a good prime cost for a restaurant?

Search around and you'll find targets of 50%, 55%, 58-62%, and 60-65%, all stated with equal confidence. They're all describing different restaurants. Here's how the targets actually break down:

The old industry standard was "keep it under 65% and you're fine." That advice is from an era of cheaper food and cheaper labor. With every line on the P&L more expensive than it was five years ago, 65% leaves almost nothing. Treat 65% as the ceiling, not the target.

Where does the rest of the revenue go? Roughly 6-10% to occupancy, another 5-8% to utilities, insurance, and other operating costs. What survives is your profit, typically 3-9%. Our restaurant profit margins guide breaks down the full P&L.

Track it weekly, not monthly

A monthly prime cost tells you what already happened. By the time your accountant flags a bad month, you've repeated the same mistakes for four more weeks.

The owners who get this number under control run it every week: inventory count Sunday night, payroll report Monday morning, ten minutes of math. A bad produce delivery, an overstaffed Tuesday, or a portioning problem shows up in days instead of months. Notice that the Reddit owner above quoted his prime costs by week. That's not an accident. Weekly tracking is how he caught the 111% week and how he knows the fixes are working.

The cheap-ingredient trap

Most prime cost advice stops at the P&L level. But the number is built dish by dish, and that's where the surprises hide.

That same Reddit owner cut pinto beans from his weekly specials and got immediate pushback from regulars: "Aren't pintos cheap?" The ingredients, yes. The dish, no:

• Hours of prep labor for one weekly special
• Only two people on staff knew how to make them right
• Inconsistent volume meant high waste on every batch

Customers said "just make less." But smaller batches make the per-portion cost worse, not better: the same prep labor spread across fewer covers. A dish with a 20% food cost can still be a prime cost disaster once labor and waste are counted.

This is why you can't manage prime cost from the P&L alone. The COGS line tells you food cost went up. It doesn't tell you which dish did it. For that you need food cost per recipe: what each menu item costs to make at current ingredient prices. DishCost does this half for you. Cost every recipe once, and when an ingredient price changes, every dish that uses it recalculates, so you can see which items are quietly dragging your prime cost up.

How to lower prime cost

Two components, two sets of levers.

Food cost levers

Reprice your recipes with current invoices. If your recipe costs are based on prices from six months ago, your menu prices are based on numbers that no longer exist. This is the most common silent killer.

Trim the menu. Every extra item adds prep labor, inventory, and waste. The Reddit owner's biggest gains came from cutting an oversized menu. Menu engineering gives you a framework for deciding what stays.

Audit your top 5 sellers. They drive most of your COGS. One top seller running 10 points above target moves your whole prime cost.

Get a second supplier quote. Even if you don't switch, a competing number is leverage at your next price review.

Labor cost levers

Schedule to sales, not habit. Pull your sales by day and daypart. If Tuesday lunch does $800 and you staff it like Friday dinner, that's prime cost leaking every week.

Cross-train. Remember the pinto beans: when only two people can make a dish, you're scheduling around recipes. Staff who can cover multiple stations mean fewer bodies per shift.

Measure dollars per labor hour. Sales divided by total labor hours, week over week. It catches overstaffing that a labor percentage hides on a busy week. Run your numbers in the labor cost calculator to see where you stand.

And one more, the uncomfortable one: raise prices where you're underpriced. As one operator put it in that same thread, no one ever shrunk their way to success in this business. Cost controls can't fix a menu that's priced for 2019.