Prime Cost for Restaurants: The Formula That Actually Predicts Survival

Last updated 2026-07-29.

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A healthy prime cost, food and beverage COGS plus fully loaded labor, should land between 60% and 65% of sales for a full-service restaurant, 55% to 60% for quick-service, and no higher than 65% for anyone who plans to stay open. Above 68% and the location is either underpriced, overstaffed, or bleeding food waste. Prime cost is the single number that predicts survival because it captures the two costs an operator can actually control.

The single number that separates surviving from bleeding

What is prime cost for a restaurant? It is food (COGS) plus total labor, expressed as a percentage of sales. Under 60% and you have a business. North of 65% and you are burning cash without knowing it yet.

On a $2M location, every point of prime cost is $20,000 a year. Drift 3 points and you have handed $60,000 to your suppliers and your schedule without ever seeing it hit the bank account. In 15+ years running chain P&Ls, the operators who survive rough quarters share one habit: they know their prime cost by Sunday, not the 20th of the following month.

Rent does not move much week to week. Utilities do not move much week to week. Prime cost moves every single shift, which is exactly why it deserves the operator’s attention and not the bookkeeper’s.

The prime cost restaurant formula

Prime Cost % = (COGS + Total Labor) / Total Sales × 100

Run it against a real store:

• Sales: $2,000,000 per year
• COGS: $700,000 (35% food cost)
• Total labor, fully loaded: $500,000 (25%)

Prime Cost = ($700,000 + $500,000) / $2,000,000 = 60%.

That is a clean full-service P&L. It leaves 40 points for occupancy, other operating expenses, and profit. Miss the labor load-up and you will tell yourself the number is 55% and wonder why cash keeps disappearing.

The three ways operators miscalculate labor

1. Skipping payroll taxes. FICA, FUTA, SUTA, and state loading typically add 8 to 10 points on top of gross wages. If you are quoting labor at 22% of sales without payroll taxes, real labor is closer to 24%.
2. Skipping benefits and workers’ comp. Health contributions, PTO accrual, and workers’ comp premiums add another 5 to 8 points, especially in California and New York.
3. Not including salaried managers. Every hour a GM works is a labor hour. Every bonus, every stipend, every meal comp counts. Leave the salaried team out and you understate labor by 3 to 5 points.

I once inherited a chain reporting 22% labor. Real, fully loaded labor was 32%. That is a 10-point miss on a $2M store, or $200,000 a year the operator was spending and calling profit.

The three ways operators miscalculate COGS

1. Confusing purchases with actual food cost. If your food cost is really “the check I wrote to Sysco this week,” you are measuring cash flow, not COGS. Beginning inventory plus purchases minus ending inventory. That is the real number.
2. Not counting waste and comps. Comps are food cost. Employee meals are food cost. Waste is food cost. Manager tastes are food cost. If it left the walk-in and did not generate revenue, it belongs in the numerator.
3. Beverage mixed in with food. Beverage margins are much better than food margins. Blend them and you will hide a food cost problem behind a strong bar. Track them separately, then roll them up.

What healthy looks like by segment

Prime cost benchmarks are not one-size. Ranges I have used with operators for years:

• Full-service casual: 55% to 60%
• Casual dining chain: 58% to 62%
• Fine dining: 60% to 65% (food cost runs higher, labor is often lower on a per-check basis)
• QSR: 55% to 60%
• Bar-heavy concepts: 50% to 55% (beverage margin subsidizes the model)

A quick-serve store running 62% prime cost is bleeding. A fine dining room at 62% is doing fine. Context matters. Pick your target range and defend it every week.

Grab the Restaurant Toolkit, the P&L template and food cost calculator we use with operators every week. It plugs directly into the prime cost formula above.

Weekly vs monthly: why monthly is too late

The most expensive habit in this industry is running prime cost monthly. Your accountant hands you a clean P&L on the 20th of the following month. By that time, the drift has been running for six weeks. Six weeks at 3 points of miss on a $2M store is roughly $6,900 in lost margin, gone.

Prime cost is a weekly discipline or it is useless. The routine that works:

• Sunday morning, pull the week just closed.
• Take an inventory count (or a rolling estimate on non-count weeks).
• Run the prime cost calculation against last week’s sales.
• Compare to your target and to the same week last year.

If the number moves 2 points against you, you have five days to act before the next weekly close. That is how a good operator catches a bleed at $2,000 instead of $60,000.

The best operators I have worked with keep a simple three-column log: target, actual, delta. Nothing fancy. When the delta hits 100 basis points, they investigate. When it hits 200, they act that week. Waiting for a monthly close to trigger the same behavior costs an average location $30,000 to $50,000 a year in avoidable drift.

The three moves when prime cost drifts above target

The instinct is to cut labor first because it looks easy. Wrong order. Take these in sequence.

1. Cut the deepest food-cost line first. It is almost always protein waste (poor yield, over-portioning, prep loss). Weigh what leaves the walk-in, weigh what hits the plate, compare. The gap is your money.
2. Rebuild the schedule against sales-per-labor-hour, not headcount. Set a target dollar of sales per productive labor hour by daypart. Schedule to that. Cutting people without cutting hours (or cutting the wrong hours) is what starts the death spiral.
3. Menu-mix engineer within two weeks. Push the four items with the best contribution margin. De-emphasize the two dragging you down. New training card, revised menu placement, small price test on the highest-elasticity item.

Two weeks of that sequence, in that order, recovers 2 to 4 points on most operators. Skip the sequence and you will cut a Wednesday morning prep cook, watch quality dip on Friday night, and be down 2 points on a different line by month-end.

One more thing on the schedule move. Sales-per-labor-hour is a good target only if you are willing to look at it by daypart. A single blended number for a full-service restaurant hides the fact that lunch is often 40% below target while a strong dinner drags the average into range. Fix the shift that is bleeding, not the whole schedule.

What comes next

Prime cost is one number inside a broader financial discipline. Cash reserves, occupancy load, and check compression all interact with it. A restaurant at 61% prime cost can still fail if rent is 12% and cash is 3 weeks. A room at 63% can survive if the model is built for it.

Run the number this Sunday. Run it next Sunday. Watch the trend, not the point. If two weeks in a row are 2 points off, you have a problem worth blocking a full afternoon for.

Ready to see where else the model is drifting? Get the free Restaurant Finance Glossary. Free, 15 minutes, and it flags the six or seven other numbers that quietly decide whether a good prime cost turns into a good year.

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See also: Restaurant Food Cost by Concept: Is 33% Good or Bad? · The 30/30/30/10 Rule for Restaurants: Where It Breaks · What the top 3% of restaurant CFOs do differently on Monday mornings

Frequently Asked Questions

What is a healthy prime cost for a full-service restaurant?

60% to 65% of sales. Above 68% is a survival risk that needs action inside 30 days.

Is prime cost the same as COGS?

No. Prime cost equals COGS plus fully loaded labor, meaning wages, payroll taxes, benefits, and workers comp.

Why is prime cost the number that predicts survival?

It captures the two largest cost categories operators can control day to day. Everything else is largely fixed or contractual.

How often should I calculate prime cost?

Weekly, against a rolling four-week trend. Monthly is too late to act.

What if my prime cost is 70%?

You have three levers: reprice, retrain the kitchen on portion control, and cut a shift. Pick two.

Written by The Pragmatic CFO. 15+ years running restaurant P&Ls.