Auto rental agencies offer collision damage waivers and liability policies. The collision damage waiver is not insurance. It is an agreement that the rental company will waive its right, with certain exceptions, to recover the cost of the car’s damage from the renter.
If you have auto insurance, your policy may already cover damage to a rental car. Your coverage limit, however, might be less than the value of a rental car. Read your policy to know what’s covered and the coverage limits. If your coverage limit is too low, consider increasing it. You will pay more in premium, but it might be cheaper than buying additional coverage through the rental agency, especially if you rent cars often.
If you don’t own a car, but borrow or rent cars often, you can buy a non-owner liability policy. A non-owner policy pays for damages and injuries you cause when driving a borrowed or rented car, but it does not pay for your injuries or damage to the car you are driving.