Cost Control

How do you calculate restaurant food waste percentage?

Direct answer

Choose and label one denominator. For a purchasing-control view, divide recorded waste cost by food purchases; for a sales view, divide waste cost by food sales. Multiply by 100 and never compare reports that use different denominators.

Key points

  • Waste % = Recorded Waste Cost / Chosen Denominator x 100.
  • Record waste at ingredient or recipe cost, not menu price.
  • Unlogged spoilage and over-portioning remain inside actual food-cost variance.

What to do next

  1. 1Log spoilage, prep loss, mistakes, and returned food at cost.
  2. 2Choose food purchases, food cost, or food sales as the documented denominator.
  3. 3Review waste by reason, item, station, shift, and manager before changing purchasing or prep.

Worked example

If recorded waste costs $480 and food purchases are $24,000, purchase-based waste is 480 / 24,000 x 100 = 2.0%.

Deeper tools and guides