Just charge the full cost of any car rental to your eligible Citi MasterCard® card, and you'll be insured up to the value of the car if it's damaged or stolen. This benefit costs you nothing extra, and at the same time, can save you up to $15 a day on insurance fees. That's over $100 on a one-week rental. Simply decline the Collision Damage Waiver option offered by the rental company, and the rest will be taken care of for you.