Car insurance can be costly, this we know. But one of the biggest questions many have with regards to car insurance is, why does it go down when we turn 25 and why do you have to be 25 to rent a car? Well the main reason is liability. The more inexperienced you are at driving, the more likely you are to get into a wreck. Care rental businesses don’t want to have that liability on their hands when loaning a car. This infographic presented by Auto Insurance Center illustrates the many reasons why you must be 25 to rent a car and why car insurance drops after your turn 25.