The inventory-based formula
Food cost % = (Beginning food inventory + Food purchases − Ending food inventory) ÷ Food sales × 100. The inventory figures should be valued consistently, and food sales should cover the same period as the counts and invoices. Inventory-based food cost measures food used, not just the ingredients in plates sold.
If food cost is tracked separately from beverage cost, do not divide food inventory consumption by combined food and beverage sales. Keep the numerator and denominator aligned.
Work through an example
- Beginning inventory: $8,000.
- Food purchases received during the period: $5,000.
- Ending inventory: $7,000.
- Food sales for the same period: $20,000.
- Food used = $8,000 + $5,000 − $7,000 = $6,000.
- Food cost % = $6,000 ÷ $20,000 × 100 = 30%.
This example describes a reporting-period result; it is not an industry target. Your appropriate target depends on your concept, menu mix and financial plan.
What you need before calculating
- An opening and closing inventory count using comparable categories and unit costs.
- A complete list of invoices received in the period, with credits and returns handled consistently.
- Food sales excluding categories that are not included in your food inventory calculation.
- A written rule for transfers between locations, employee meals, waste and complimentary food.
When beginning and ending counts are taken at inconsistent times, apparent cost can shift between weeks. Choose a cutoff and stick to it.
What to check when food cost rises
- Verify the figures first. Review missed invoices, units of measure, miscounts and transfers.
- Compare sales mix. A shift toward high-cost dishes can increase the percentage even when kitchen execution is unchanged.
- Review portioning and yields. Recheck recipe cards, serving utensils, trim and cooking losses.
- Track waste separately. Spoilage, mistakes and rejected deliveries need their own record to identify corrective actions.
- Watch purchase prices. Compare current invoice pricing with the costs used in your menu calculations.
Use a repeatable weekly review: record the percentage, investigate two or three meaningful variances, assign an owner and follow up next count.
Food cost versus menu-item cost
A menu-item recipe cost adds up the ingredient amounts in one serving. Inventory-based food cost measures food consumed across the business, including waste and other losses. If menu-item costs look fine while actual food cost rises, inspect portions, yields, waste, accounting cutoffs and mix before raising prices.
Pair this calculation with the menu price calculator and the inventory turnover calculator for more context.