Gap insurance: do I need it?

Gap endorsements and GAP waivers are narrower than most shoppers expect. Progressive’s own gap-insurance page lists the following items that gap coverage “may not cover”:

• Additional charges related to your loan, like finance or excess-mileage charges
• Other property or injuries resulting from an accident
• Engine failure or other repairs

Separately, Progressive describes the math as “your gap coverage covers the gap, minus your deductible,” so you still pay your comprehensive or collision deductible out of pocket on a total-loss claim. Carrier-specific gap products and dealer GAP waivers vary; always read your own policy or waiver language before counting on any specific exclusion.

Source for this list: Progressive · Loan/Lease Payoff and Gap Insurance. Verified October 25, 2026.

Three pieces of arithmetic, no modeled values. Every number in the result is computed from what you entered.

insurance_payout       = max(0, ACV − deductible)
owed_without_gap       = max(0, loan − insurance_payout)
gap_amount             = max(0, loan − ACV)
gap_pct_of_acv         = gap_amount ÷ ACV × 100
progressive_llp_cap    = ACV × 25%
loan_lease_payoff_pays = min(gap_amount, progressive_llp_cap)
residual_deductible    = deductible (always, unless the policy covers it)

Two numbers are easy to confuse here, so we split them out. The gap amount (loan − ACV) is what a gap product targets — the pre-deductible shortfall between the loan and the car’s value. The “without gap you’d owe” number (loan − insurance payout) is bigger by exactly the deductible, because without gap your insurance check comes in deductible-light. The gap product closes the pre-deductible shortfall; the deductible itself is your share of the physical-damage settlement and stays yours unless the policy specifically covers it.

The 25%-of-ACV cap is specific to Progressive’s Loan/Lease Payoff. Progressive’s own answer page notes the exact limit varies by state; the 25% figure is their published default. Traditional insurer gap and dealer GAP waivers typically pay the full gap_amount, within their own product rules.

The verdict chip picks from three cases: