Primary and Excess: How California Decides Which Policy Pays First

On this page:

• Why the order matters
• The general rule: the car's own policy
• Dealers, shops, valets and garages
• Rentals and long-term leases
• Loading, unloading and changing the order
• Common situations at a glance
• What it means for you

"Whose insurance pays?" is one of the most common questions after a crash involving a car that was borrowed, rented, loaned or being serviced. In California the answer for liability coverage is not left to the insurers to argue about from scratch. A single statute, Insurance Code section 11580.9, sets conclusive presumptions about which policy is primary and which is excess.

Why the order matters

The primary policy pays first, up to its limits, and handles the claim. An excess policy pays only after the primary policy's limits are used up, or where the primary coverage is not valid and collectible. When a serious crash exceeds one policy's limits, the order decides whether a second policy helps and whose claim history the loss lands on. The rules below concern liability insurance, the coverage for harm done to others; damage to the car itself under collision or comprehensive follows the terms of the policies involved.

The general rule: the car's own policy

Under subdivision (d), when two or more liability policies apply to the same vehicle in an accident, the policy on which that vehicle is described or rated as an owned automobile is primary, and every other policy is excess. If you borrow a friend's car with permission and cause a crash, your friend's policy pays first and your own policy, if it covers you driving other cars, sits behind it. This is the source of the familiar saying that insurance follows the car.

Dealers, shops, valets and garages

Subdivision (a) covers businesses that sell, repair, service, deliver, test, road-test, park or store vehicles, and it works in both directions.

• When the business is driving: if the vehicle is being operated by the business or its employee or agent, the business's policy is primary. A valet, a mechanic on a road test or a dealership employee moving your car falls here.
• When someone else is driving: if anyone other than the business or its people is operating the vehicle, the business's policy is excess over all other insurance available to that driver. Driving a dealer's loaner or taking a test drive puts your own policy first.

Rentals and long-term leases

Subdivision (b) applies to companies that rent or lease vehicles without drivers. It makes the rental company's policy excess over the renter's own insurance, provided the renter's policy has at least the state's financial responsibility limits, but only when the vehicle is a commercial vehicle, meaning one used to carry people for hire or designed or used primarily to carry property, such as a cargo van or moving truck, or when it has been leased for six months or longer. For an ordinary rental car on a short rental, this presumption does not apply, and the rental contract and your own policy's terms decide; that varies by insurance company and by rental company, so check both before you drive away.

Loading, unloading and changing the order

Subdivision (c) addresses injuries during loading or unloading on someone's premises: where the premises owner's policy also applies, the vehicle's policy is not primary but excess, up to the state's financial responsibility limits. And under subdivision (f), these presumptions can be changed only by a written agreement signed by every insurer involved and every named insured, so a clause in one company's policy cannot rewrite the order on its own.

Common situations at a glance

What it means for you

Lending your car means lending your liability coverage, and a claim caused by your friend can land on your policy. Driving someone else's car means relying first on their limits, which may be the state minimum. And driving a loaner or a rented truck means your own coverage is the first line, so check that it extends to vehicles you do not own before you need it. Whether your policy covers you in other vehicles, and on what terms, varies by insurance company.

If you regularly lend, borrow or rent vehicles and want to know where you stand, you can ask a licensed broker to walk through your policy with you.