How many day do you have to notify your insurance company after buying a used vehicle?

It depends on the insurance company and the state in which you live. Generally, you should notify your insurance company as soon as possible after purchasing a used vehicle, but the specific number of days can range from 14 to 30 days. It's important to check with your insurance company's policy or contact their customer service department to determine the exact timeframe for reporting the purchase of a used vehicle.