Liability for injuries/damage to others and physical damage to the rental car.
Covers damage to the rental car itself.
You’ll at least need to buy the Liability coverage. do i need to buy rental car insurance
Covers medical bills for you and your passengers. Liability for injuries/damage to others and physical damage
Most U.S. policies and credit cards won't cover you in certain foreign countries. do i need to buy rental car insurance
Your personal policy might not cover cars rented for work purposes.
If you have "full coverage" (comprehensive and collision) on your own car, it usually extends to your rental vehicle for personal use in the U.S. and Canada.