Prime Cost
Prime cost is the combined total of Cost of Goods Sold (COGS) and total labor costs in a restaurant, typically expressed as a percentage of total sales and representing the two largest controllable expenses in foodservice operations.
Prime cost is the combined total of your Cost of Goods Sold (COGS) and total labor costs. It represents the two largest controllable expenses in restaurant operations and typically accounts for 60-70% of total sales. Every restaurant owner needs to track this metric because it directly determines profitability—prime costs above 65% make it extremely difficult to turn a profit in most restaurant formats.
How to Calculate Prime Cost
The formula is straightforward: Prime Cost = COGS + Total Labor Costs. COGS includes food, beverages, and related supplies like packaging, napkins, and coffee filters. Calculate it as Beginning Inventory + Purchases – Ending Inventory for your period.
Total labor costs include every employee expense: wages, salaries, payroll taxes, benefits, workers’ compensation, and health insurance. Don’t forget to include management salaries and employer-paid portions of taxes and insurance.
Express prime cost as a percentage: (Prime Cost / Total Sales) × 100. This percentage is what operators use to benchmark performance and make operational decisions.
Industry Benchmarks by Restaurant Type
Quick service restaurants run tightest at 55-60% prime cost. Their streamlined menus and efficient labor models allow lower percentages while maintaining quality.
Fast casual targets 58-63%. The slightly higher labor costs from more complex preparation and table service bump the range up a few points.
Full service restaurants operate at 60-65%. Table service, more extensive menus, and higher staffing levels push costs higher while still maintaining profitability.
Fine dining can run up to 65% due to premium ingredients, extensive prep work, and higher staff-to-guest ratios. Above this threshold, even fine dining margins compress dangerously.
Why Weekly Tracking Matters
Track prime cost weekly, not monthly. Monthly tracking hides problems for 30 days while they compound. Restaurant owners who monitor weekly add an average of 2-5% to their bottom line by catching issues early.
Weekly calculations reveal patterns: a walk-in malfunction that spoiled inventory, unexpected overtime from understaffing, or theft. By the time monthly reports show these problems, you’ve lost thousands in preventable costs.
Set up a simple weekly routine: count inventory Monday morning, pull labor reports Friday, calculate prime cost by Saturday. This rhythm gives you time to adjust schedules, ordering, and menu items before problems snowball.
What Prime Cost Does NOT Include
Prime cost excludes all overhead and indirect costs. Rent, utilities, equipment leases, marketing, insurance (except health/workers’ comp), repairs, accounting fees, and administrative expenses sit outside prime cost calculations.
This is why prime cost is also called “controllable costs” or “direct costs”—you directly influence these numbers through daily operational decisions. Rent and utilities happen regardless of your sales volume.
Using Prime Cost to Drive Profitability
Prime cost percentage guides menu pricing decisions. If a dish’s ingredient and labor costs consume 70% of its selling price, you’re losing money on every plate. Menu engineering starts with understanding each item’s contribution to overall prime cost.
Track prime cost by daypart to identify inefficiencies. Lunch might run at 58% while dinner hits 68%. This signals overstaffing during slower periods or menu items with poor cost structures. Reduce ticket times to improve labor efficiency without sacrificing quality.
Implement waste reduction strategies to lower COGS. Every dollar saved on preventable waste drops straight to your bottom line. Cross-utilize ingredients, implement proper storage protocols, and train staff on portion control.
Common Uses
Restaurant operators use prime cost percentage as the primary financial health metric in daily operations. General managers review weekly prime cost reports to adjust labor schedules, modify purchasing patterns, and identify profitability issues before they compound. Controllers and owners track the metric across multiple locations to benchmark performance and set operational standards. Chefs and kitchen managers use prime cost data when engineering menus, pricing dishes, and making ingredient substitution decisions. Financial planners reference prime cost percentages when creating budgets, forecasting cash flow, and evaluating expansion opportunities. Lenders and investors examine prime cost trends during due diligence to assess operational efficiency and management competency.