A restaurant group in Chicago had 4 locations. The owner tracked food cost obsessively. Weekly reports. Supplier scorecards. Portion control audits. Every location ran between 27-29% food cost. He thought he was running a tight ship.
Their prime cost was 68%.
Nobody was watching labor. The kitchens were overstaffed for Monday-Wednesday. Managers were clocking 55 hours but doing 35 hours of actual work. The combined food + labor cost was eating 68 cents of every dollar before rent, insurance, or anything else. Two locations were losing $4,000-7,000 a month. The owner didn't know because he only looked at food cost.
Prime cost is the number that actually tells you whether your restaurant works. Food cost is just half the story.
Industry Data & Sources:
The National Restaurant Association's 2026 State of the Industry report provides benchmark data on restaurant costs and profitability.
RestaurantOwner.com surveys show that top-performing restaurants maintain prime costs between 55-60%.
The Bureau of Labor Statistics tracks employment and wage data across the restaurant industry.
What Prime Cost Actually Is
Prime cost is the sum of your cost of goods sold (food + beverage cost) and your total labor cost (wages + payroll taxes + benefits + workers' comp). That's it. Two numbers added together.
For most full-service restaurants, prime cost should be 55-60% of sales. Fast-casual and quick-service can run 50-55% because labor is lower. Fine dining often runs 60-65% because both food and labor cost more.
If your prime cost is above 65%, you're almost certainly losing money. Below 55%, you're either unusually efficient or under-investing in something that will bite you later.
Why Food Cost Alone is Misleading
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A restaurant running 25% food cost sounds great. Unless their labor is 42% because they have a chef-driven kitchen with 8 people on the line for 120 covers. Their prime cost is 67%. They're drowning.
Another restaurant runs 34% food cost. Looks bad. But they're a fast-casual concept with 22% labor because the menu is designed for speed and minimal staffing. Prime cost: 56%. They're profitable.
Food cost and labor cost trade off against each other. More prep labor usually means lower food cost (buying whole proteins and breaking them down, making stocks from scratch). Less labor usually means higher food cost (buying pre-portioned proteins, using prepared sauces). The prime cost tells you whether the trade-off is working.
The 60% Rule
For an independent full-service restaurant, prime cost should not exceed 60%. That's the ceiling. If you're at 62%, you need to find 2 points somewhere. If you're at 65%, you have a structural problem that cutting a few hours won't fix.
Here's how the math breaks down at 60% prime cost on $1 million in annual revenue:
| Component | Percentage | Annual Dollars |
|---|---|---|
| Food cost | 28-30% | $280,000-300,000 |
| Beverage cost | 2-3% | $20,000-30,000 |
| Salaried labor | 8-12% | $80,000-120,000 |
| Hourly labor | 15-18% | $150,000-180,000 |
| Payroll taxes + benefits | 3-5% | $30,000-50,000 |
| Total Prime Cost | 58-62% | $580,000-620,000 |
That leaves 38-42% for rent (6-10%), operating expenses (10-15%), marketing (2-4%), and profit (8-15%). If prime cost hits 65%, profit goes to 5-8%. At 70%, you're breaking even or losing money.
How to Calculate Prime Cost Correctly
Most restaurants calculate prime cost wrong. Here are the common errors:
Counting salaried managers as overhead instead of labor. If someone's primary job is running the restaurant, their salary is labor cost. Period. Putting the GM's $65,000 salary in "administrative expenses" makes your labor cost look 3-4 points lower than it actually is.
Forgetting payroll taxes. The $15/hour you pay your line cook actually costs you about $17.25 after FICA, unemployment insurance, and workers' comp. If you calculate labor at the wage rate instead of the loaded rate, you're understating labor by 12-15%.
Counting owner's draw as profit instead of labor. If you work 50 hours a week in your restaurant and don't pay yourself a salary, your labor cost is artificially low. Your "profit" isn't profit. It's your unpaid wages. Pay yourself a market-rate salary and count it in labor cost. Then see what your real profit is.
Mixing up periods. Food cost is calculated on usage (what you actually consumed). Labor is calculated on hours worked in the period. If you use food purchases instead of food usage for your food cost, and hours paid instead of hours worked for labor, your prime cost is comparing two different things.
The Labor-Food Trade-off
The best operators run higher food costs on purpose because it lets them run much lower labor. One pizza chain ran 26% food cost and 24% labor. Their competitor ran 22% food cost and 31% labor. Same prime cost: 50% vs 53%. The first operator was actually in a better position because their model was less dependent on finding and keeping skilled kitchen labor.
The question isn't "how do I lower food cost?" It's "what combination of food and labor cost gives me the best prime cost while maintaining quality?"
A restaurant prime cost analysis should be a monthly exercise. Track both numbers. Watch the ratio. If food cost drops 2 points but labor rises 3, your prime cost got worse. Don't celebrate the food cost win.
What to Do When Prime Cost is Too High
If food cost is the problem: Start with recipe costing. Cost every dish. Compare actual costs to theoretical costs. The gap is your opportunity. Then work through the hidden food cost leaks one by one.
If labor cost is the problem: Look at your schedule before you look at your wages. Most high labor cost comes from overstaffing slow periods, not from paying people too much. A restaurant paying $16/hour with tight scheduling beats a restaurant paying $13/hour with loose scheduling every time. Our restaurant labor cost guide covers the scheduling side in detail.
If both are the problem: You have a concept issue. Your menu is too labor-intensive for your price point, or your prices are too low for your cost structure. This requires a menu redesign, not a cost-cutting exercise.
Track Both Numbers
Use our food cost calculator to get your food cost dialed in. Then pull your labor reports and calculate your prime cost. Do this monthly. The trend matters more than any single month's number.
Related reading: Restaurant Prime Cost Guide · Restaurant Labor Cost Guide · What is a Good Food Cost Percentage?
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