However, they're not an option in many states. Full coverage car insurance for an 18-year-old driver on their own policy costs an average of $530 per month. The cheapest major car insurance company ...

Travelers, Geico, State Farm and USAA round out our top five auto insurers for 18-year-old drivers. Full-coverage car insurance for an 18-year-old costs $5,150 per year or $429 per month on average.

It's free, simple and secure. The average cost of motorcycle insurance for an 18-year-old is $945 per year. Geico has the cheapest motorcycle insurance for 18-year-old riders at $811 per year, but ...