Most rental companies provide basic insurance coverage as part of the rental agreement. This coverage usually includes liability insurance and collision damage waiver (CDW) or loss damage waiver (LDW), which limit your financial responsibility in case of damage or theft of the rental vehicle. However, it's recommended to review your existing auto insurance policy or credit card benefits to determine if they provide adequate coverage for rental cars. If not, you may consider purchasing additional insurance from the rental company to ensure comprehensive protection.