By the end of Saturday dinner, you’ve sold out of the short rib special, the dining room has turned over twice, and the weekly sales report is $2,000 ahead of last week. It feels like the special earned a permanent spot on the menu. Before you print it there, look at what it cost to put those plates on the table.
Say your restaurant brought in $30,000 last week and had $11,400 left after food, beverage and labor costs. This week, sales reached $32,000, but only $10,880 was left to cover rent, utilities, insurance and everything else. You sold $2,000 more and had $520 less to work with.
Restaurant prime cost helps explain how that happens. It also gives you a place to start before you raise prices across the menu or ask a manager to take someone off the Saturday schedule.
What Is Restaurant Prime Cost?
Restaurant prime cost is the cost of the food and beverages your restaurant used, plus the labor cost for the same period. The restaurant prime cost percentage tells you how much of each sales dollar those costs consumed. At 66%, for example, you have 34 cents of every sales dollar left to cover other expenses and, if there’s enough left over, earn a profit.
The prime cost formula for restaurants is:
Prime cost = Food and beverage cost of goods sold + Total labor cost
Prime cost percentage = Prime cost ÷ Net sales × 100
Use sales after discounts and refunds. Exclude sales tax and customer tips passed through to staff. For labor, include hourly wages, overtime, salaried managers, employer payroll taxes and employer-paid benefits. If you pull only hourly wages from your scheduling app, your labor percentage will look better than the cost reflected in your books.
Here’s what happened in those two weeks:
| Weekly Results | Last Week | This Week |
| Net sales | $30,000 | $32,000 |
| Food and beverage cost | $9,000 | $10,400 |
| Total labor cost | $9,600 | $10,720 |
| Prime cost | $18,600 | $21,120 |
| Prime cost percentage | 62% | 66% |
| Left to cover other expenses and profit | $11,400 | $10,880 |
Food and beverage costs rose by $1,400. Labor rose by another $1,120. Together, they used up the entire $2,000 sales increase and another $520. That tells you which records to open next. It still leaves open whether the short rib special earned its place.
What the Food Invoices Can’t Tell You
A Friday delivery can make one week look expensive even when half the order is still in the walk-in on Sunday. For a reliable restaurant food cost analysis, count inventory at the same point each week and calculate what the kitchen actually used.
Food cost = Beginning food inventory + Food purchases − Ending food inventory
Food cost percentage = Food cost ÷ Net food sales × 100
Suppose you started the week with $6,000 of food, received $9,200 in food deliveries and ended with $7,400 on the shelves. Your food cost was $7,800. If the kitchen generated $24,000 in net food sales, your food cost percentage was 32.5%. Use food sales for this calculation. Including bar sales in the denominator would make the kitchen appear more profitable every time the bar had a strong week. When calculating prime cost for the whole restaurant, bring beverage costs and beverage sales back in.
Now go back to the short ribs. Say the recipe assumes a $120 case produces 20 portions. That puts the meat at $6 per plate. If the kitchen gets only 16 sellable portions after trimming and cooking, the cost is actually $7.50. On 80 orders, that’s $120 the recipe estimate missed, before the sides or sauce hit the plate.
The next step is to watch a batch being prepped. If the case consistently yields 16 portions, update the recipe cost and revisit the menu price. If it produces 20 portions on Thursday and 16 on Saturday, check portion sizes during the rush. If usable portions are left over and discarded, the better decision may be to braise a smaller batch. A price increase might recover some money, but it won’t tell the chef how much to prep on Friday.
Where to Look Before You Cut a Shift
In the weekly example, labor went from 32% of net sales to 33.5%. A manager asked to bring that percentage down might cut a server from Saturday dinner because that’s the shift with the most people on the clock. It’s also the shift that may need every one of them.
Start your restaurant labor cost tracking with actual clock-in and clock-out times alongside sales by half hour. If the host has a waitlist at 7 p.m. but four servers clocked in at 3:30 for a dining room that stays quiet until 5, staggered start times deserve a look. Check what those employees were doing first. Opening side work still has to get done, and moving it into the dinner rush can cost you table turns.
Overtime needs the same context. If a line cook stays late every Saturday, find out what’s keeping them there. You may need another pair of hands at close. Or the kitchen may be spending two extra hours breaking down a special that looked profitable when you priced only the ingredients. That’s why it pays to review food and labor together before changing either one.
Which Menu Items Actually Earn Their Space?
Food cost percentage is useful when ingredient prices change. When deciding what to feature, look at the dollars left per order as well.
A $28 entrée with $10 of ingredients leaves $18 before labor and other costs. A $19 entrée with $5 of ingredients leaves $14. The second dish has the lower food cost percentage, but the first leaves $4 more per sale. If both take about the same effort to prepare and customers order them at similar rates, pushing the lower-percentage dish could leave you with less money at the end of service.
The decision changes if the $28 entrée ties up your only sauté station while tickets back up. At that point, speak with the chef about the prep or how many orders the line can handle on a Saturday. Your point-of-sale report can tell you what sold. The person working the station can tell you what else you could have sold.
A Weekly Review You Can Use While There’s Time to Act
Pick a consistent end to your reporting week. Match the inventory count, deliveries, net sales and labor earned during those dates. A biweekly paycheck may cover shifts in two different reporting weeks. Charging the whole payroll to payday can make one week look unusually efficient and the next look overstaffed. Another common mistake is using the deposit from a delivery platform as sales. A payout may already have commissions and other fees deducted, so reconcile it to the sales report before using it in your calculation.
Among restaurant financial performance metrics, prime cost is most useful as a trend. Read the latest week beside the previous few weeks, then look at food and labor separately to see which one moved. Give the review a specific outcome. “Food cost is high” won’t help anyone place Thursday’s order. “Count the portions from the next two cases of short ribs before we renew the special” will.
Frequently Asked Questions
What Is a Good Restaurant Prime Cost Percentage?
A practical target starts with what your restaurant has to cover. Suppose rent and other operating expenses outside prime cost absorb 30% of net sales, and you want a 5% operating profit margin. That leaves room for a 65% prime cost. If those other expenses take 35%, the same profit goal leaves room for only 60%. Work backward from your own expenses before adopting a target from a restaurant with a different lease or service model.
Is Restaurant Food and Labor Cost Percentage the Same as Prime Cost Percentage?
Yes, if you include beverage costs and the full cost of labor, and divide both by the same total net sales figure. Be careful when adding percentages from separate reports. A kitchen food cost percentage based on food sales alone can’t simply be added to a labor percentage based on total restaurant sales. Add the cost dollars first, then divide by total net sales.
How Often Should a Small Restaurant Calculate Prime Cost?
Weekly is a useful starting point if you can count inventory consistently. It gives you time to adjust the next food order or schedule. At month-end, reconcile those weekly figures to your books so late invoices, payroll taxes and benefits make it into the final numbers. If a weekly inventory count is new for your team, start by counting your highest-cost ingredients consistently while you build toward a full count. Treat those early figures as estimates.
Should I Raise Menu Prices When Prime Cost Goes Up?
First, find out what changed. If the supplier price rose and the kitchen is getting the expected number of portions, repricing that dish may make sense. If the price per case held steady but more food went into the trash, start with purchasing and prep quantities. An across-the-board increase is a big decision to make from one Saturday’s results.
If your dining room stays busy but there’s less left after payroll than you expected, bring a recent sales mix report, inventory count and payroll summary to Prudent Accountants. Our Minneapolis team can help you work out whether the pressure is coming from menu pricing, staffing or the way costs are recorded. Call 612-605-3178 or contact Prudent Accountants.
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