Setting up what you carry

The first panel asks about two things that follow you to the rental desk: your own auto policy and the rental benefit on the card you pay with. A liability-only policy is kept apart from a policy with collision coverage, because only collision pays for the rental car itself. For the card, the benefits guide answers four questions that each decide one line of the bill: loss of use, the administrative fee, diminished value and towing. Any of them can stay at “Not sure,” and the bill then holds that charge in its own unknown total instead of guessing.

The four checkboxes underneath are conditions that card benefits and rental waivers attach to coverage. Unchecking the first two takes the card off the bill. Unchecking the last two turns the card and waiver stamps to unknown, since whether they still pay comes down to the contract wording.

Three bills to start from

Scratch, Collision and Total loss are examples, not averages, and “Edit this damage” rewrites any line. Loss of use is days out of service times your daily rate, so a 10-day repair on a $45-a-day car adds $450 on its own. Total loss swaps the repair line for the market value of the car and drops diminished value, because a written-off car is never sold as a repaired one.

Reading the stamps

Each charge carries a stamp for every payer: CARD, YOUR INSURER, WAIVED, YOU or UNKNOWN. When a charge is shared, such as a repair your insurer pays above the deductible while a secondary card reimburses the deductible, the line gets two stamps with the split amounts. Tapping a stamp shows the reason behind it. The strip above the lines shows who pays first, which is exactly where primary and secondary benefits part ways: a primary card goes ahead of your auto policy, and a secondary card waits behind it.

In the $800 scratch example with a secondary card and a $500 deductible, $300 of the repair runs through your auto policy and the card picks up the deductible, loss of use and the fee, so nothing is left for you at the counter. Switch the card to primary and the counter total is still zero, but your auto policy never sees the claim. That difference only shows up in the next section.

What arrives with your renewal

If any line reaches your auto policy, the calculator adds a separate estimate of the surcharge, kept out of the bill total because it arrives later and is less certain. The 48% default follows NerdWallet’s April 2026 analysis of full-coverage rates after an at-fault accident. ValuePenguin’s figures put the national average at 49%, ranging from 14% at State Farm to 73% at Geico, which is why the rate, the premium and the number of years are all editable. For the $800 scratch above, 48% of an $1,800 premium is $864 a year, or $2,592 over three years, for a claim that paid out $300. Marking someone else as the cause, or turning on accident forgiveness, removes the surcharge from the estimate.

The side-by-side panel compares letting your policy pay with keeping it out of the claim entirely. With a secondary card, keeping your insurer out leaves the card’s share marked unknown, because many secondary benefits expect a claim with your own insurer first.

Lines that state law removes

Choosing New York, Wisconsin or Delaware strikes loss of use and the administrative fee from the bill, and the stamp reads STATE LAW. New York General Business Law § 396-z and Delaware Code Title 6 § 4902B bar both charges from the renter and the renter’s insurer; Wisconsin Statutes § 344.574 bars them from renters and authorized drivers. California Civil Code § 1939.05 caps the administrative fee by the size of the repair: nothing up to $100 of parts and labor, then $50, $100, and $150 above $1,500. Other states appear without a state rule, which means this calculator does not model one, not that none exists.

Where the bill stops

Injuries and damage to other people’s cars or property are liability, and they are not on this bill; card rental benefits generally leave them out. Outside the U.S. and Canada, most personal auto policies do not follow you, according to Consumer Reports’ check with major insurers, so the calculator takes your policy off the bill there and marks card coverage for checking. Vans, pickups and luxury cars trigger the same check on both the card and your policy, because either can exclude them or cap what they pay.

This page models how charges are usually routed, based on the terms you enter. It is not insurance or legal advice: your card’s benefits guide, your policy and the rental agreement decide what is actually paid. Last updated September 24, 2026.