When is a warranty reserve recorded?

When the obligation is probable and the amount is reasonably estimable. The approval share and average claim cost turn the machine population into that estimate.

Do I use claim cost or repair cost per machine?

Use the expected cost per claim, including parts, labor and dealer handling. Warranty history for the failure mode is the best source for the average.

Why add the service campaign to the exposure?

The campaign is a separate field action cost that arrives whether or not every machine claims. Adding it gives the full reserve finance accrues for the issue.

How is the approval share used?

It scales gross claim exposure to the portion expected to be approved. A lower approval share lowers the reserve; a higher one raises it.

Agricultural Equipment & Farm Machinery Manufacturing calculator

Field Failure Warranty Reserve Calculator

Size the warranty reserve for a confirmed field issue across delivered machines. Enter the population, expected claim cost and approval share, then the service campaign and the budget finance set.

What this calculator does

Warranty reserve for a field failure from affected machines, expected claim cost, approval share and the service campaign.

Formula used

Claim exposure = affected machines × claim cost per machine × approval share ÷ 100
Warranty reserve = claim exposure + service bulletin or campaign cost
Reserve per machine = warranty reserve ÷ affected machines
Variance = warranty reserve − reserve budget

Inputs explained

Affected Machines in the Field: Machines covered by the issue, from the serial list.
Claim Cost per Machine: Expected claim cost per affected machine, from warranty history.
Approved Claim Share: Share of claims expected to be approved, from the claims adjuster.
Service Bulletin or Campaign Cost: Service bulletin or campaign cost, from the field action plan.
Warranty Reserve Budget: Reserve budget finance set for the issue, from the accrual plan.

How to use the result

Best suited to sizing a field action accrual, checking reserve headroom before a campaign, comparing claim scenarios for a defect.
The reserve is an estimate: approval rates and repair costs move as claims arrive. Campaign logistics outside the bulletined repair are separate from this reserve.

Current U.S. benchmarks

Industrial natural gas averages $4.58 per Mcf (EIA, Jul 2026), down 1.3% from a year earlier, with industrial electricity at 9.77 cents per kWh. Process heating and refrigeration budgets track both.
Steel mill PPI stands at 381.162 (BLS, Aug 2026), up 23.4% from a year earlier. New factory orders are up 8.5% year over year (Census).
The U.S. has 21,668 machinery manufacturing establishments employing about 1,086,146 workers (Census County Business Patterns, 2023).

Common questions

When is a warranty reserve recorded? When the obligation is probable and the amount is reasonably estimable. The approval share and average claim cost turn the machine population into that estimate.
Do I use claim cost or repair cost per machine? Use the expected cost per claim, including parts, labor and dealer handling. Warranty history for the failure mode is the best source for the average.
Why add the service campaign to the exposure? The campaign is a separate field action cost that arrives whether or not every machine claims. Adding it gives the full reserve finance accrues for the issue.
How is the approval share used? It scales gross claim exposure to the portion expected to be approved. A lower approval share lowers the reserve; a higher one raises it.

Last reviewed 2026-10-01.