Laurie Carter | Aug 12 2026 13:00
Prime cost is the combined total of your cost of goods sold (COGS) and total labor costs. For most restaurants, a healthy prime cost falls around 55% to 65% of sales, though the right target depends on your concept, service style, menu, and market. This guide explains how to calculate it, what makes it climb, and how better daily tracking can turn prime cost into one of the most useful profitability tools in your restaurant.
If you own or manage a restaurant in Summerville, SC, the Lowcountry, or the Bluffton area, you already know that strong sales do not automatically mean strong profits. You can have a packed dining room, busy takeout orders, and a great reputation—then look at the bank balance and wonder where the money went. Prime cost often answers that question.
At Moore Accounting Group, LLC, we understand the realities behind restaurant numbers because our founders began their careers in restaurant management. That background matters. Restaurant owners need timely, practical information they can use to make decisions between the lunch rush, staff scheduling, inventory deliveries, and the next payroll—not accounting jargon that arrives weeks too late.
What Is Prime Cost?
Prime cost is the total of two of the biggest expenses in nearly every restaurant:
- Cost of goods sold (COGS): the food, beverages, paper products, and other items used to serve guests.
- Total labor: hourly wages, salaries, overtime, payroll taxes, benefits, workers’ compensation, and other labor-related costs.
In simple terms, prime cost tells you how much of every sales dollar goes to the ingredients and people required to operate your restaurant. It is not the only number that matters, but it is often the number that gives owners the fastest read on whether operations are under control.
For many full-service and quick-service restaurants, a prime cost in the 55% to 65% range is a reasonable benchmark. A restaurant with a 60% prime cost spends about 60 cents of every sales dollar on products and labor, leaving 40 cents to cover occupancy, utilities, marketing, repairs, technology, insurance, debt, owner compensation, and profit. If prime cost rises too far above your workable target, those remaining expenses can quickly consume the margin.
How To Calculate Prime Cost
The formula is straightforward:
Prime Cost = Cost of Goods Sold + Total Labor Costs
To see it as a percentage of sales:
Prime Cost Percentage = (COGS + Total Labor Costs) ÷ Total Sales × 100
For example, assume your restaurant produces $100,000 in sales for the month. Your COGS is $30,000, and your total labor cost is $29,000.
- COGS: $30,000
- Total labor: $29,000
- Prime cost: $59,000
- Prime cost percentage: $59,000 ÷ $100,000 = 59%
That 59% may be healthy for your operation. The key is to compare it with your own target and review it consistently. A 59% prime cost can be excellent for one restaurant and concerning for another if it is several points above its normal performance.
Moore Accounting Group, LLC often encourages restaurant owners to avoid treating prime cost as a once-a-month surprise. Weekly review is useful; daily monitoring of the sales and labor inputs is even better. The faster you see a problem, the easier it is to correct before it becomes an expensive month-end result.
Start With Accurate Cost Of Goods Sold
COGS is more than the total of invoices that arrived from vendors. It reflects what your restaurant actually used during the period. Accurate COGS begins with reliable inventory counts and a clear method for recording purchases, credits, transfers, and waste.
A basic calculation looks like this:
Beginning Inventory + Purchases − Ending Inventory = COGS
If your food cost seems too high, start by asking practical questions. Are portions consistent? Are prep teams following recipes? Is product being over-ordered or expiring before it is used? Are delivery invoices matching what was ordered? Are beverages, paper goods, and other supplies being categorized correctly?
Food waste is one of the most common quiet drains on restaurant profitability. A few discarded proteins, over-prepped sides, spoiled produce, or unrecorded comps may not seem significant in a single shift. Across a month, they can move prime cost by several points. Tracking waste by reason—spoilage, overproduction, employee error, or returned guest order—helps you find the operational issue rather than simply seeing an unfavorable number.
Labor Is More Than Scheduled Wages
Labor can be just as challenging because it changes quickly with traffic, staffing gaps, training needs, and callouts. To calculate prime cost correctly, include more than gross payroll. Add payroll taxes, benefits, workers’ compensation, overtime, and any other direct labor costs.
Overtime is a particularly important signal. Sometimes it is the right decision: a major event, unexpected rush, or short-term coverage need may justify it. But recurring overtime can point to scheduling problems, turnover, weak cross-training, or a staffing model that does not match actual sales patterns.
Look at labor alongside sales by daypart. If lunch sales are soft but your lunch staffing remains the same, labor percentage rises. If Friday night sales surge and the team cannot keep up, you may lose guests, create waste, or pay unnecessary overtime afterward. The goal is not simply to cut labor; it is to schedule the right people, in the right roles, at the right times.
Watch For Vendor Prices And Menu Margin Changes
Vendor price increases can raise prime cost even when your staff is doing everything right. Protein, dairy, produce, cooking oil, beverage products, packaging, and specialty ingredients can change in price with little warning. If purchasing costs go up but menu prices and portions stay the same, your margins shrink.
Review vendor invoices regularly and compare key item prices over time. When a major ingredient jumps, you may need to negotiate, consider approved alternatives, adjust a recipe, feature a more profitable item, or update menu pricing. A small price adjustment is often easier for guests to accept than a long stretch of selling a popular item at an unprofitable margin.
This is where a restaurant-specific chart of accounts makes a real difference. Instead of lumping everything into a generic “supplies” or “food expense” bucket, separate food, beer, wine, liquor, nonalcoholic beverages, paper goods, kitchen labor, front-of-house labor, payroll taxes, and related costs in a way that makes operational sense. Clear categories make it easier to spot whether the issue is food, bar cost, labor, or something else entirely.
Why Daily Sales And POS Reconciliation Matter
Prime cost is only as useful as the information supporting it. Daily sales and POS reconciliation help make sure the sales number is complete and accurate before you use it to judge costs and labor.
Each day, reconcile POS sales to credit card batches, cash deposits, gift card activity, discounts, voids, refunds, delivery-platform settlements, and tips. This routine helps uncover data-entry errors, missing deposits, unusual discount activity, timing differences, and potential cash-handling issues. It also means your weekly prime-cost review is built on numbers you can trust.
For restaurant owners across Summerville, SC, the Lowcountry, and the Bluffton area, timely reconciliation is especially valuable during busy seasons. When sales are moving quickly, small errors can pile up just as quickly. A disciplined daily process gives you cleaner books and faster decisions.
Use Prime Cost To Guide Decisions, Not Just Review History
The best restaurant operators use prime cost as a management tool. Review the total, then break it down. Did food cost rise because of waste, vendor pricing, portioning, or inventory controls? Did labor increase because of overtime, lower sales, training, or scheduling? The answer tells you what to fix.
Moore Accounting Group, LLC helps restaurant owners move beyond simply receiving financial statements. With restaurant-focused bookkeeping, clean reconciliation, and reporting designed around the way restaurants operate, you can see the trends behind the numbers and respond with confidence.
FAQ
What is a good prime cost percentage for a restaurant?
Many restaurants target roughly 55% to 65% of sales. Your ideal range depends on your concept, menu mix, service model, wage levels, and local market, so compare your result to your own budget and historical performance.
How often should I calculate prime cost?
Monthly calculation is the minimum, but weekly tracking is far more useful. Reviewing sales and labor daily gives you the quickest opportunity to adjust schedules, purchasing, or operations.
Does prime cost include rent and utilities?
No. Prime cost focuses on COGS and total labor. Rent, utilities, insurance, repairs, marketing, and other overhead costs still matter, but they are reviewed separately.
Can a busy restaurant still have a high prime cost?
Absolutely. Higher sales can hide problems when labor, waste, overtime, or vendor costs rise at the same time. That is why prime cost should be measured as a percentage of sales, not just a dollar amount.
What should I do if my prime cost is too high?
First, separate the issue into food and labor. Then review inventory counts, waste logs, vendor invoices, portion controls, schedules, overtime, and POS sales data. Fixing the specific driver is much more effective than making across-the-board cuts.
If you want a clearer view of what is driving profitability in your restaurant, request a prime cost review with Moore Accounting Group, LLC. Our team brings restaurant-industry perspective to owners in Summerville, SC, throughout the Lowcountry, and in the Bluffton area—and we can help you turn your numbers into practical next steps.
