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Over-Prep Waste Cost Calculator

Estimates what over-prep costs a restaurant kitchen each week and each year in thrown-out food and wasted prep labor, and what a lower waste share would save.

Your numbers

Results update as you type.

Your estimate

Weekly cost of over-prep (food plus labor)...
Annual cost of over-prep...
Weekly prep hours spent on food that gets tossed...
Annual savings if you reach the target waste share...

Estimates only. Assumptions are listed below, and you can change every input.

Over-prep hides well. A few hotel pans of cut vegetables tossed on Sunday night, a batch of sauce that went past its hold time, proteins portioned for a rush that never came. None of it shows up as a single line on the P&L, so it rarely gets fixed. This calculator adds it up: the ingredient cost of what gets thrown out plus the labor that went into prepping it, per week and per year, using your own numbers.

You enter the weekly cost of food that goes through prep, the share of it that ends up in the trash, the weekly hours spent on prep and a labor rate. The waste share is applied to both food cost and prep hours, on the idea that a portion thrown out cost the same to make as one that sold. A target waste share lets you see what tighter pars and better counts would be worth over a year. There are no industry averages behind the numbers; if you do not know your waste share, log it for two weeks before trusting the result.

How to use this tool

  1. Estimate the weekly ingredient cost of what goes through prep from your purchases and recipe costs.
  2. Enter the share you throw out, ideally from a two week waste log, and the weekly hours spent on prep.
  3. Set a realistic target share and read the weekly, annual and savings figures.

What the math assumes

  • The waste share applies equally to food cost and prep labor hours, so a discarded portion is assumed to have cost as much to prep as one that sold.
  • Weekly figures are multiplied by the weeks open you enter; the default of 52 assumes no seasonal closure.
  • Savings compare the current waste share with the target share on the same food cost and hours; the cost of getting there, such as training or software, is not subtracted.
  • Labor cost uses the hourly rate you enter; enter a loaded rate if you want payroll taxes and benefits included.
  • Savings never show as negative; a target above your current share returns zero.

Frequently asked questions

How do I measure the share of prepped food that gets thrown out?

Log what is discarded at close for two weeks, cost it at ingredient prices from your recipe cards, and divide by the food cost that went through prep in the same period. It takes effort, but a guessed percentage makes the whole estimate a guess.

Does this calculator include the cost of under-prep?

No. Running out costs sales rather than food, and that is harder to put a number on. This tool only counts what is made and not sold.

Is the labor part really money lost?

Not always. If staff are on shift anyway, the hours may go to other work rather than showing up as payroll savings. Set the labor rate to zero to see the food-only figure.

Link to this toolhttps://prepdeckr.com/tools/over-prep-waste-cost/

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