Which policy pays when someone drives a borrowed car with the owner's permission - the omnibus clause, the exclusions that defeat it, and the owner-liability statutes some states add.
In most states an auto liability policy covers not only the named insured but anyone driving the insured vehicle with the owner's permission. That is the omnibus clause, and it is the origin of the shorthand that insurance follows the car rather than the driver: when a permissive driver causes a crash, the owner's policy is usually the primary coverage and the driver's own policy, if any, sits behind it as excess. Whether permission existed, and whether the driver stayed within its scope, is therefore a live question in many borrowed-car claims - a driver who took the car beyond what was allowed, or a person driving without any permission at all, may find no coverage on either side.
The clause has exclusions that catch people by surprise. A named-driver exclusion removes a specific person, often a household member with a bad record, from all coverage under the policy. A regular-use exclusion means a car a person drives routinely but does not own is not covered by their own policy. Business-use and livery exclusions remove coverage when the car is used to carry passengers or goods for pay, which is why rideshare driving needs its own coverage. Household members who are not listed on the policy are treated differently from one policy form to another.
Separately from insurance, a number of states make the owner personally liable for a permissive driver's negligence by statute, and a few treat a car as a dangerous instrumentality for which the owner answers regardless of the driver's fault. Those rules impose liability on the owner; the omnibus clause decides who pays for it. Rental companies are protected from ownership-based liability by federal law, though not from their own negligence.
The two questions to bring a lawyer after a borrowed-car crash are whether permission existed within the meaning of the owner's policy and which policy is primary, because both insurers have an interest in answering them against the claimant. A person who regularly drives someone else's car, or lets a family member drive theirs, should have the exclusions on both policies read before an accident rather than after one.
Choose your state. Each link opens the directory page for the city in that state with the most currently published law firms in this practice area; a +n beside the city is how many other cities in the state also have one. The list is generated when this page loads, so a state whose listings have lapsed drops out rather than becoming a dead link.