Originally Posted by hertz

If renting in California:

Hertz provides no liability protection under the terms of the Rental Agreement to the renter from claims of injury by others against you resulting from an accident. Your personal/business insurance may cover your liability. Exceptions: Hertz will provide primary liability protection up to the statutory minimum limits to international customers (driver's license indicates an address outside the USA) renting in California. Please also refer to Liability Insurance Supplement (LIS) below.

If renting in Maryland, Massachusetts, Michigan, Minnesota, New York, South Carolina, Virginia, or West Virginia:

Upon signing the Rental Agreement, Hertz provides primary liability protection. However, such protection is generally no more than the minimum limits required by individual state law. See Financial Responsibility Limits by State.

If renting in any other state in the U.S.A.:

Hertz will provide secondary liability protection from claims of injury by others against you resulting from an accident with the rental car. Your personal/business insurance is primary to the minimum state limits. In the event there is no applicable liability protection, Hertz, by default, becomes primary.