How Long Can I Be On My Parent's Auto Insurance? 
There are only two things that might prevent you from staying on your parent 's auto policy ; 1 -RRB- If you obtain a car of your own and register it in your name , then in most states , you will have to purchase and maintain your own auto insurance policy 2 -RRB- your parents decide it is time for you to be on your own and responsible for your own car and insurance . 