Restaurant prime cost: combine food and labor into one weekly line

Start with the same period

Prime cost combines food cost and labor cost, but the line is only useful when sales, food, and loaded labor cover the same week. Different periods or missing payroll burden can make a change look real when it is only a definition mismatch.

• Use the same sales period for both costs.
• Keep food cost and loaded labor separate in the source records.
• Record unusual events before comparing weeks.

Read the combined line and its drivers

The combined percentage shows how much of sales is consumed by the two largest direct operating drivers. Review the food and labor percentages independently before changing a menu, supplier, schedule, or price.

Turn variance into one next check

If prime cost is above the target line, choose the driver with the clearest evidence and assign one test for the next close. A portion check, purchase comparison, paid-hours review, or sales scenario is more useful than a general instruction to cut costs.

• Do not lower labor blindly if service or sales deteriorate.
• Do not hide waste inside regular food cost.
• Keep the target assumption visible when it changes.