How to Measure What Food Waste Actually Costs Your Restaurant

The Honest Answer

A restaurant’s food-waste cost is not one number hiding in a national average. It is a stack of costs that must be measured separately:

1. What you spend buying food that is never sold or eaten. This is a purchasing and kitchen-operations problem.
2. What you spend collecting and disposing of scraps. This appears in your waste contract, extra-pull charges, container fees, and cleaning work.
3. What you spend controlling the side effects. Count only documented expenses such as repeated dumpster-pad cleaning, odor response, or pest-control work.
4. What a separate food-waste service costs, if one is available to you. For OnFarmCompost, that is the number of barrels hauled multiplied by $10, but that service is limited to accounts that can arrive source-separated or depackaged, not typical restaurant back-of-house waste.

A compost pickup service can measure and divert the discarded material. It does not automatically recover the purchase price of wasted food, cancel your dumpster contract, eliminate pests, or create a guaranteed monthly saving.

One note before the worksheet: OnFarmCompost’s own composting service only accepts organics that arrive source-separated or depackaged. Most restaurant back-of-house waste arrives mixed with plastic, cardboard, gloves, and wrappers, which does not currently qualify. The measurement method below is useful regardless of which provider, if any, ends up handling your material.

Start With the Compost-Service Number

OnFarmCompost bills per barrel hauled. Monthly figures below use 52 weeks divided by 12 months, so they are averages rather than a four-week shortcut.

A filled 55-gallon drum has weighed roughly 100 to 200 pounds in OnFarmCompost operations. That range is not a promise that every drum holds 200 pounds. Menu mix, moisture, bone content, how staff fill the liner, and when the drum is swapped all change the weight. A free audit measures your location instead of pricing fractional barrels from an assumed capacity, for accounts that qualify.

Build the Current-Cost Baseline

Pull the last three months of records and complete this table.

Do not assign the full base dumpster bill to food waste. The dumpster still handles packaging, paper, plastic, and other trash after organics are separated.

Use a 7-Day Measurement

For one representative week, whether you’re auditing with a provider or on your own:

1. Place sealed containers outside at an agreed collection point.
2. Have staff send food scraps to a dedicated lined can, then tie the bag and place it in the container.
3. Record the number of containers used.
4. Weigh the collected material.
5. Note contamination, unusual events, covers or transactions, and whether the week was typical.
6. Repeat during a materially different season or volume period if one week is not representative.

The output should show:

• Measured pounds for the week.
• Actual containers hauled.
• Pounds per container for that audit.
• Contamination observations.
• Recommended weekly container count.
• Average monthly service price, once you have a quote.
• Which current waste-service changes are possible, if any.

Calculate Net Cost Without Inventing Savings

Use these formulas:

Average monthly compost cost
= weekly barrels x $10 x 52 / 12

Verified monthly avoided disposal cost
= confirmed lower service level
+ documented extra pulls that will no longer occur
+ other recurring costs that have actually been removed

Net monthly change
= average monthly compost cost
- verified monthly avoided disposal cost

Illustrative example

A food business fills two barrels per week.

2 barrels x $10 x 52 / 12 = $86.67 average monthly compost cost

If its current hauler confirms that a schedule change will save $60 per month, the measured incremental cost is:

$86.67 - $60 = $26.67 per month

If the business cannot change its existing service, the incremental cost remains $86.67. The diversion may still be worthwhile for operations, reporting, customer commitments, or farm impact, but it should not be sold as a guaranteed hauling saving.

Costs That Need Their Own Evidence

Purchased food that becomes waste

Food purchasing loss can be much larger than disposal cost, but compost weights alone do not tell you why the food was discarded or what it cost. Separate prep trim, spoilage, overproduction, returned plates, and unavoidable scraps before assigning a purchasing value.

Pest control

A closed, gasket-sealed exterior container can reduce direct access to the food placed inside it. It does not eliminate existing infestations, clean a dumpster pad, seal a building, or replace a licensed pest professional. Track pest calls and invoices before and after a workflow change if you want to measure an effect.

Health inspections and fines

Do not place hypothetical citations, reinspection fees, closures, or lost revenue into a standard monthly cost estimate. Those are contingent risks, not recurring savings. Waste areas still need to meet applicable sanitation, container, cleaning, and pest-control requirements regardless of whether food scraps are composted.

Dumpster changes

Removing wet food material may make a smaller container or lower pickup frequency possible. Only the current hauler can confirm contract options, pricing, minimums, and change fees. A slower-filling dumpster is an observation; a lower invoice is a verified saving.

The Decision Worksheet

EPA waste-reduction guidance recommends consistent measurement and tracking both waste quantities and avoided waste-removal or purchasing costs. That is the right standard here: measured inputs, labeled assumptions, and no conversion of a sales hope into an accounting fact.

Sources and method: EPA Metrics for Waste Reduction (consistent measurement and avoided-cost tracking); EPA Wasted Food Measurement Methodology (national sector generation factors and their planning context); City of Houston composting page (private providers and public programs); OnFarmCompost (service price, audit process, and observed drum-weight range). Costs in worked examples are arithmetic scenarios, not claims about a specific restaurant or guaranteed savings.