What You Need to Know About Insurance When You Borrow Someone Else's Car

Your own insurance may not cover you when driving someone else's vehicle

When you borrow a car, your own auto insurance policy usually does not follow you into that vehicle. Instead, the car owner's insurance is the primary coverage — meaning it pays first if you cause an accident. However, the owner's policy may not cover damage to their car if you are the driver, and it almost certainly will not cover your medical bills or liability if you cause injury to someone else.

The gap between what the owner's policy covers and what you actually need can leave you personally responsible for thousands of dollars in damages. Before you get behind the wheel, you need to understand whose insurance pays, what it covers, and what you should do to protect yourself.

Key Takeaways

• The car owner's insurance is primary coverage and pays first for damage to their vehicle, but may exclude you as a driver or require you to be a household member.
• Your own auto insurance policy typically does not extend to borrowed vehicles unless you have a specific endorsement or your policy includes non-owned vehicle coverage.
• If you cause injury or property damage to someone else, you may be personally liable for amounts exceeding the owner's policy limits.
• Renting a car is different from borrowing one — rental companies require you to purchase their coverage or prove you have your own, and your personal policy may not cover rentals.
• Before borrowing a car, ask the owner to confirm their coverage limits and whether their policy covers permissive drivers, then check your own policy for any gaps.

How the owner's insurance works when you borrow their car

When you drive someone else's car with their permission, their auto insurance policy is the first line of coverage if you cause an accident. This is called permissive use — the owner has allowed you to drive, so their insurer will typically cover damage to their vehicle and your liability to third parties (other people you injure or whose property you damage).

However, there are real limits. Many policies exclude coverage if the driver is not a household member, is under a certain age, or does not have a valid license. Some policies exclude coverage for drivers who live with the owner but are not listed on the policy. You need to ask the owner to check their policy documents or call their insurer before you drive, because a claim denial after an accident is too late.

Even if you are covered under the owner's policy, that coverage only goes as high as their policy limits. If you cause a serious accident and the damages exceed their limits — say they have $50,000 in liability coverage but you injure someone who incurs $200,000 in medical bills — you are personally responsible for the difference.

What your own auto insurance does and does not cover

If you own a car and carry auto insurance, your policy almost certainly does not extend to vehicles you borrow. Standard personal auto policies cover only vehicles listed on your policy. Driving an unlisted car means you have no coverage under your own policy, even if you cause an accident.

Some insurers offer non-owned vehicle coverage as an add-on endorsement, but this is uncommon and usually applies only to rental cars, not borrowed personal vehicles. If you frequently borrow cars — for example, you use a family member's vehicle regularly — you should ask your insurer whether they offer this coverage and what it costs.

If you do not own a car and do not carry insurance, you have no personal coverage at all when you borrow. You are entirely dependent on the owner's policy, and if that policy excludes you or has low limits, you are exposed to significant financial risk.

Your personal liability if the owner's insurance does not cover you

If you cause an accident while driving a borrowed car and the owner's insurance does not cover you — either because their policy excludes you or because you exceed their limits — you are personally liable for all damages. This includes damage to the borrowed car, medical bills for anyone you injure, property damage to other vehicles or structures, and legal fees if you are sued.

The injured party or their insurer can pursue you directly through a lawsuit, and a judgment against you can result in wage garnishment, bank account levies, or a lien on your home or other assets. This is why it is critical to confirm coverage before you drive, not after an accident.

In South Carolina, the minimum liability insurance required by law is $25,000 per person and $50,000 per accident for bodily injury, plus $25,000 for property damage. If you cause an accident that exceeds these amounts, you are responsible for the overage out of pocket.

Renting a car is different from borrowing one

When you rent a car from a rental company, the situation is different. Rental agencies require you to either purchase their collision damage waiver (CDW) or prove that your own insurance covers rental vehicles. Your personal auto insurance may not cover rentals — many policies explicitly exclude them.

Before you rent, call your insurer and ask whether your policy covers rental cars and what the limits are. If it does not, you will need to purchase the rental company's coverage, which typically costs $15 to $30 per day. Some credit cards offer rental car coverage if you charge the rental to that card, but you need to verify the coverage limits and what it actually covers before you rely on it.

Borrowing a personal car from a friend or family member is simpler in this regard — there is no rental company requiring proof of coverage — but the insurance questions are the same.

What to do before you borrow a car

Before you accept the keys, take these steps. First, ask the owner to confirm that their insurance policy covers permissive drivers and that you meet any requirements (age, license status, household membership). Ask them for their insurer's name and policy number so you can verify this yourself if needed.

Second, check your own auto insurance policy or call your agent to confirm whether you have any coverage for non-owned vehicles. If you do not own a car, ask whether you need to purchase a non-owner policy if you borrow cars regularly.

Third, ask the owner what their liability limits are. If they have only the state minimum ($25,000/$50,000), you are at higher risk if you cause a serious accident. In that case, you may want to decline the loan or ask whether they have an umbrella policy that provides additional coverage.

Finally, if you are borrowing a car for a long trip or frequent use, consider whether the owner's homeowner's or renter's insurance provides any additional coverage, and ask the owner to add you to their policy temporarily if possible.

What happens if you cause an accident while borrowing a car

If you are in an accident, notify the owner immediately and do not admit fault to anyone except police. The owner should file a claim with their insurance company right away. Provide the insurer with accurate information about how the accident happened, who was involved, and any injuries or property damage.

The owner's insurer will investigate and determine whether the claim is covered under their policy. If you are covered, they will handle the claim and pay for repairs or injuries up to the policy limits. If you are not covered — because the policy excludes you or you do not meet the requirements — the insurer will deny the claim and you will be responsible for all damages.

If damages exceed the owner's policy limits, the owner may pursue you for the difference, or the injured party may sue you directly. This is why confirming coverage before you drive is so important.

Frequently Asked Questions

Will my car insurance cover me if I borrow someone else's car?

No, standard auto insurance policies do not cover borrowed vehicles. Your policy covers only vehicles listed on your policy. If you borrow a car frequently, ask your insurer whether they offer non-owned vehicle coverage, though this is uncommon for personal loans.

What if the owner's insurance has low limits and I cause a serious accident?

You are personally liable for damages that exceed the owner's policy limits. If you cause $200,000 in damages and the owner's policy limit is $50,000, you owe the remaining $150,000. This is why you should ask about the owner's coverage limits before you drive.

Can I be sued personally if I cause an accident in a borrowed car?

Yes, if the owner's insurance does not cover you or if damages exceed their limits, the injured party can sue you directly. A judgment against you can result in wage garnishment, bank levies, or liens on your assets.

Does the owner's homeowner's insurance cover damage to their car if I borrow it?

No, homeowner's insurance does not cover vehicle damage. Only the auto insurance policy on the vehicle itself covers damage to the car. Homeowner's insurance may cover liability if you injure someone, but only if the injury is not related to the vehicle.

What should I do if the owner's insurer denies my claim?

Ask the insurer in writing why the claim was denied and request a copy of the policy language they relied on. If you believe the denial is wrong, you can file a complaint with the South Carolina Department of Insurance or consult an attorney about your options.