For the most part, if your son is going to school full-time and his primary address is still your house, you can keep him on your policy. Keeping children on your policy ensures that when they borrow the car while at home, they are covered and likewise if they were to drive someone else’s car while at school. If they take a car to college with them, it’s important to keep them on your policy as well—and it’s cheaper. You’ll still want to contact your insurer, however, to let them know where the car will be parked (also known as the “garaging address”). Sometimes rates can go up or down depending on that location.