Restaurant Prime Cost: The Number Food and Labour Create Together

Prime cost is one of the most useful restaurant operating numbers because it combines the two large costs operators can influence most directly: Prime cost = cost of goods sold + labour costs As a percentage of sales: Prime cost % = prime cost ÷ net sales × 100 If a restaurant has $120,000 in monthly sales, $38,400 of food-and-beverage COGS and $43,800 of labour and benefits: Prime cost = $38,400 + $43,800 = $82,200 Prime cost % = $82,200 ÷ $120,000 = 68.5% You can calculate this alongside the rest of the monthly P&L in the restaurant profit margin calculator. ## Why prime cost is more useful than food cost alone A restaurant can improve one major cost while getting worse overall. Suppose food cost falls by two percentage points because portions are tighter and purchasing improves. If labour rises by four points because scheduling does not match demand, the operation did not become healthier just because the food-cost report looks better. Prime cost forces the operator to look at the combined burden. It also helps prevent false tradeoffs. Cutting labour aggressively can damage throughput, hospitality, cleanliness or sales. Cutting food cost aggressively can damage portion value or product quality. The job is not to minimize either line independently. It is to operate the restaurant so the combined economics support the concept. ## What belongs in labour cost? For a useful prime-cost calculation, labour should reflect the costs the restaurant actually carries for people. Depending on the P&L, that may include: - hourly wages;

• salaries;
• payroll taxes;
• employee benefits;
• employer insurance or statutory costs;
• overtime;
• paid training;
• other directly labour-related costs. Be consistent. If one month includes benefits and the next excludes them, the ratio can move even if the operation did not. ## What belongs in COGS? COGS should reflect the inventory consumed during the period. The basic restaurant formula is: Beginning inventory + purchases − ending inventory = COGS See how to calculate restaurant COGS for the count and cutoff details that make that number trustworthy. ## What is a good restaurant prime cost percentage? There is no single number that defines a good restaurant. The National Restaurant Association's 2025 Restaurant Operations Data Abstract, based on more than 900 U.S. restaurant operators, found that prime costs including food, beverage and labour represented a median of roughly 65 cents of every sales dollar among limited-service respondents in 2024. The same research shows meaningful differences by service model, sales volume, location and profitability. The Association explicitly says its data is not intended to set standards or goals for individual restaurants. Use it as a comparison tool. A labour-intensive full-service restaurant can have a different workable structure from a high-throughput counter-service concept. A restaurant with unusually strong occupancy economics may tolerate a different prime-cost profile from one with expensive rent. ## Diagnose the movement, not just the percentage If prime cost rises, split it back into its components. ### If COGS moved Look at: - purchase prices;
• inventory accuracy;
• yield and trim;
• portion size;
• waste;
• recipe drift;
• sales mix. ### If labour moved Look at: - sales by daypart;
• scheduled versus actual hours;
• overtime;
• training or opening costs;
• manager coverage;
• role mix;
• productivity and throughput;
• absences and emergency coverage. Then ask whether the movement is temporary, structural or caused by a measurement issue. ## Prime cost should be read with contribution and capacity A ratio can improve because the restaurant cut hours while sales stayed flat. That may be real efficiency. It can also improve for a week because a team ran dangerously short staffed. If ticket times, reviews, cleanliness or repeat visits deteriorate, the P&L may show the damage later. This is why prime cost belongs next to operational signals such as: - sales per labour hour;
• transactions;
• average check;
• ticket time;
• overtime;
• guest complaints;
• waste;
• comp and void rates. The objective is not the lowest possible cost. It is a restaurant that can consistently deliver the product while retaining enough of each sales dollar to cover occupancy and the rest of the business. ## One margin point can be meaningful At $120,000 of monthly sales, one percentage point equals $1,200 per month or $14,400 per year if the sales base stayed constant. That does not mean every point is recoverable. It explains why small, repeatable improvements in purchasing, scheduling, menu mix or channel cost deserve attention. The restaurant profit margin calculator includes this margin-point sensitivity view. ## Use a trend, not a single panic number A one-week prime-cost spike can be caused by holiday staffing, a large inventory purchase or an irregular count. A multi-period trend is more useful. Use a consistent reporting period and annotate unusual events. Over time, the operator should be able to explain why the number moved rather than simply observe that it moved. ## Sources and further reading - National Restaurant Association: 2025 Restaurant Operations Data Abstract
• National Restaurant Association: 2024 profitability and prime-cost findings
• Restaurant profit margin calculator
• Restaurant labour cost percentage ## FAQs ### What is restaurant prime cost? Prime cost is the combined cost of goods sold and labour. Operators often express it in dollars and as a percentage of net sales. ### Does rent belong in prime cost? No. Occupancy is normally tracked separately. Prime cost is useful precisely because it isolates food/beverage COGS and labour before the rest of the operating expense structure. ### Should I cut labour when prime cost is high? Not automatically. First determine whether the movement came from COGS, labour, sales mix or a measurement issue. Cutting labour without understanding demand can reduce service capacity and create a different profit problem.