Prime Cost vs Food Cost (Why Restaurants Need Both Numbers)
Ask most restaurant owners what their food cost is, and they can rattle it off. Ask them what their prime cost is, and you get a longer pause.
In 2026, that gap is costing them money.
Food cost is an important number. But it’s only half the picture. Prime cost is the number that tells you whether your restaurant is actually running well or just feeling like it is. If you’re only watching one, you’re flying with one eye closed.
What is Food Cost for a Restaurant?
Food cost is the percentage of your revenue that goes toward the ingredients and beverages you sell. The formula is straightforward: take your cost of goods sold (CoGS) and divide it by your total revenue, then multiply by 100.
For most full-service restaurants, a healthy food and beverage cost lands somewhere between 28% and 32% of revenue. Quick-service concepts tend to run a bit tighter, because labor is doing less transformation work on the food itself. Anything drifting well above that range is worth investigating before it becomes a margin problem you can’t easily reverse.
Food cost is the number your chef talks about. It’s what drives menu pricing conversations, portion control decisions, and the weekly walk-in audit. It’s genuinely important. It just doesn’t tell you the whole story.
What is Prime Cost and How Is It Different?
Prime cost combines your cost of goods sold with your total labor costs, including wages, salaries, payroll taxes, and benefits. That’s it: CoGS + labor = prime cost. The result is expressed as a percentage of revenue, and it’s the single most important number in restaurant accounting.
The benchmark most operators aim for is 55% to 60% of revenue for full-service restaurants and 60% to 65% for quick-service and counter-service concepts. Those targets exist because in a typical restaurant, food and labor together represent the two largest and most controllable cost categories. If prime cost is healthy, you almost always have enough margin left to cover occupancy, utilities, and still turn a profit. If prime cost is drifting toward 70% or beyond, you’re working hard for very little.
We walk through this in more detail in our guide to how to calculate restaurant prime cost, but the short version is that prime cost gives you a combined view of the two costs you can actually control day to day.
Why Food Cost Alone Will Mislead You
Here’s the problem with only watching food cost: you can hit a perfect 30% food cost and still be losing money if your labor is running at 42%. The two costs move together in ways that don’t always show up until it’s too late.
Let’s look at an example. A busy weekend brunch service pushes food cost down because brunch has high-margin items like cocktails and simple egg dishes. But brunch staffing is brutal, with more front-of-house coverage for a two-hour turn, extra prep time, and often overtime from Saturday dinner bleeding into Sunday morning. We’ve seen operators celebrate a 29% food cost on brunch while their labor for that daypart is running at 46%. Their prime cost for brunch? 75%. That’s not a win.
Food cost is also easier to game. Over-portioning catches up with you. Comp policies don’t show up cleanly in CoGS. Labor, on the other hand, hits the payroll report every week and doesn’t have much room to hide. Watching both together keeps either number from masking what’s actually going on.
How to Calculate Prime Cost for Your Restaurant?
The math itself is simple. Add your cost of goods sold for a given period to your total labor costs for that same period, then divide by your total revenue and multiply by 100.
Where operators often run into trouble is in defining “total labor.” It’s not just hourly wages. It includes salaried kitchen managers, the general manager’s salary, employer-side payroll taxes (the employer’s share of Social Security and Medicare under FICA runs 7.65% on top of each employee’s wages), workers’ compensation premiums, and any benefits you’re covering. If you’re only pulling a wage report from your POS or scheduling software, you’re likely understating labor by a meaningful margin depending on your benefits load.
We set all of our restaurant clients up on Xero so that labor data flows directly from payroll into the P&L without manual entry. That means when you pull a prime cost report at the end of the week, everything is already in there.
How Often Should You Check Prime Cost?
Bi-weekly, at minimum.
Monthly reporting is fine for a lot of financial metrics, but prime cost needs tighter frequency because both food cost and labor can drift fast. A sous chef who calls out sick for two weeks drives overtime. A produce spike from a bad growing season hits CoGS immediately. Neither of those shows up on a monthly P&L review until the damage is already done.
The operators we work with who are most in control of their numbers run a weekly prime cost report every Monday morning covering the prior week. It takes about ten minutes once your accounting is set up correctly, and it tells you whether last week was actually profitable before you’re too deep into this week to do anything about it.
Reporting tools like Syft make this easy by pulling your Xero data into visual dashboards that break down food cost and labor cost side by side, so you’re not toggling between spreadsheets to get the full picture.
What To Do When Prime Cost Is Too High
Before you cut anything, figure out which side of the equation is driving the problem. Prime cost drifting above the range for your concept is a concern, but the fix looks completely different depending on whether food is running at 38% or labor is running at 38%.
If food cost is the culprit, start with portion control, purchasing discipline, and waste tracking. Check whether your recipe costing is current, because if you haven’t re-costed your menu since protein prices moved last year, your theoretical food cost is already wrong. If labor is the issue, the conversation is about scheduling efficiency, overtime management, and whether your staffing model matches your actual cover counts by daypart.
The two costs also interact. Cutting kitchen staff to bring labor down can increase waste and slow ticket times, which hurts both food cost and revenue. Raising menu prices to improve food cost percentages can reduce covers if you’re not positioned for it. Prime cost gives you the combined view you need to make those tradeoffs without fixing one number at the expense of the other.
Can you have a Healthy Food Cost and a Bad Prime Cost at the Same Time?
Yes, and it’s more common than you’d think. Labor is the variable that hides inside otherwise decent-looking financials. We’ve worked with restaurants running 30% food cost with prime costs north of 70% because their labor model was designed for a higher volume of covers than they were actually doing.
The reverse also happens. A restaurant can have labor tightly controlled at 28% while food cost drifts to 40% because kitchen management is understaffed and there’s no one watching portioning or signing off on waste. Prime cost at 68% in that scenario looks manageable, but the food cost problem compounds quickly as revenue fluctuates. The two numbers are telling you different things, and you need both to know where to focus.
Our restaurant accounting team works with independent operators and small groups to build weekly reporting that makes prime cost tracking routine rather than stressful.
If you want to get a clearer picture of where your numbers actually stand, reach out to our restaurant accounting team and we’ll start there.
Until next time!
By MATT CIANCIARULO
