If you have fully insured your own vehicle, including collision and comprehensive coverage, and rent a vehicle for pleasure only (while on vacation, for example), you do not need to buy extra insurance from the rental company. In fact, in most states your basic rental fee by law will include liability coverage for damage or injury to others. But different rules apply when you rent a car for business purposes, so check with your Budd Agent for details.
If you do not have your own insurance, be aware that many car rental liability policies cover you only at the states required minimum. Also, you should buy the collision and comprehensive coverage offered by the rental company for your own protection. Plus, do not buy a collision damage waiver (CDW) from the rental company assuming it is insurance. A CDW simply releases you from financial responsibility if you damage the vehicle you are renting, provided you comply with the terms of the rental contract. But those terms can vary considerably, and CDWs are not state-regulated, which means they are technically not insurance.
Its always a good idea to review your policy before renting a vehicle and, if necessary, contact your Budd Agent for clarification.
