Accidents while driving someone else's car

When you borrow a car with the owner's permission, the owner's insurance usually pays first, because auto coverage generally follows the car. If the owner's limits run out, your own policy can pay the rest as excess coverage. Several exceptions shift or remove coverage entirely, including excluded drivers, cars you use regularly, business use and driving without permission, so the details of both policies matter.

The usual order of payment

This reflects the common structure of personal auto policies: the coverage on a vehicle is primary, and a driver's own policy covering "non-owned" cars is excess. does car insurance follow the car or the driver? explains the principle in detail.

A worked example

These numbers are hypothetical. You borrow a friend's car and cause a crash. The other driver's injuries settle for $30,000 and their car needs $8,000 in repairs. Your friend's policy has 25/50/25 liability limits and a $500 collision deductible; yours has 100/300/100.

Without your own policy, you could be personally responsible for the $5,000 above your friend's limit.

Permission is the key

Most policies cover anyone driving the insured car with the owner's permission, known as permissive use. Permission can be stated or implied, for example from a pattern of lending the car. Problems arise when:

• You took the car without permission, or went well beyond what was allowed. The owner's insurer may deny coverage for you.
• The owner's policy limits coverage for permissive drivers. Some policies cover occasional drivers only up to the state minimum, or require frequent drivers to be listed.
• You are a listed excluded driver on the owner's policy. An exclusion usually means no coverage at all when you drive that car, and your own policy may not help either.

When your own policy may not help

Personal auto policies commonly exclude, or limit coverage for:

• Cars furnished for your regular use. If you drive a roommate's or employer's car daily, it is not treated as an occasional borrowed car. The owner should list you, or you need coverage that fits.
• Cars owned by someone in your household that are not on your policy. A household member's car generally needs to be insured on its own policy with you listed if you drive it.
• Business use, such as driving for a delivery or rideshare app in a borrowed car.
• Cars used without a reasonable belief that you were entitled to drive them.

who is covered on your car insurance policy covers these definitions.

Whose record and premium take the hit

A claim paid on the owner's policy is recorded against that policy, and the owner may see a higher premium at renewal, especially if you were at fault. Your own insurer may also learn of the crash through claims databases and treat it as an at-fault accident for you. Before you borrow a car, it is worth agreeing with the owner who will cover the deductible and any premium increase if something goes wrong.

What to do after the crash

1. Handle the scene normally: check for injuries, call police if needed, exchange information and photograph everything. The after-accident checklist and information form helps.
2. Give the other driver the owner's insurance information, since that policy is primary, and your own as well.
3. Call the owner right away. They need to report the claim to their insurer; policies require prompt notice.
4. Report the crash to your own insurer too, especially if injuries are involved or damages may exceed the owner's limits.
5. Cooperate with both insurers and keep copies of everything you send.
6. Settle the deductible question with the owner in writing.

If you are the owner lending the car

Lending your car means lending your insurance. Before handing over the keys:

• Check how your policy treats occasional drivers. Some insurers cover any permitted driver at full limits; others reduce limits or require anyone who drives regularly to be listed.
• Do not lend to an excluded driver. Your policy will typically not pay if they crash.
• Consider your limits. A crash by a borrower is paid from your liability limits first, so low limits expose both of you.
• Agree on costs in advance, including who pays your deductible and how you will handle a premium increase.
• Remember regular use changes things. If someone drives your car routinely, list them on your policy rather than relying on permissive use.

Special cases

• Rental cars. Different rules; see accidents in a rental car: whose insurance pays.
• Car-sharing services. Peer-to-peer platforms have their own insurance structures; see Insurance for Turo and peer-to-peer car sharing.
• Company cars. The employer's commercial policy usually applies; personal use may be restricted.
• Test drives. Dealership policies commonly cover the car; your liability coverage may still be excess.
• You don't own a car. If you borrow cars often, a non-owner policy provides your own excess liability.

Key takeaways

• The owner's insurance is usually primary when you crash a borrowed car; your own liability can pay as excess.
• Permission matters: driving without it, or as an excluded driver, can leave no coverage.
• Regular use of someone else's car, or a car owned by someone in your household, usually requires being listed on that policy.
• The claim lands on the owner's record and can raise their premium, so agree on the deductible and costs in advance.
• Report to both the owner's insurer and your own if damages may exceed the owner's limits.