Auto Insurance Total-Loss & GAP Worksheet Method, Formula & Examples
On this page
This method guide explains the calculation sequence behind the Auto Insurance Total-Loss & GAP Worksheet. It owns formulas, input definitions, timing, rounding and reference checks; the calculator remains the only page that performs the numeric scenario.
Calculation sequence
Primary payout is capped written value plus covered adjustments less deductible. GAP then applies only to the remaining payoff shortfall after entered exclusions and its own limit.
Inputs and evidence
Use current written documents for every material input. The calculator supports: Market and currency, Insurer-approved vehicle value, Covered positive adjustments, Collision or comprehensive deductible, Primary policy payout limit, Vehicle loan or lease payoff, Remaining GAP benefit limit, GAP exclusions and unpaid amounts.
Reference example
A 25,000 valuation plus 500 adjustments less a 1,000 deductible produces 24,500. Against a 28,000 payoff, the shortfall is 3,500; a 500 GAP exclusion leaves a 3,000 modeled GAP payment.
Boundary and error checks
Test zero-rate branches where available, minimum and maximum supported inputs, and a scenario in which the main result reverses. Reject blank, non-finite or out-of-range values rather than silently substituting them.
Model boundary
The tool does not value the vehicle, determine liability or coverage, calculate tax, replacement endorsements, salvage, betterment, rental, injury or legal remedies.
Sources and review status
Sources and model boundaries checked 2026-10-08. This new opportunity-map expansion has automated formula, fixture and source QA but has not been represented as human editorial review. Keep the route noindex until CalculatorGeek records a completed YMYL editorial review.