Geico is No. 1 in our rating of the best car insurance companies. Other top-rated insurers include Travelers for its affordability and Progressive for its customer loyalty.

Failing to do these things could cost you big — potentially tens of thousands of dollars.

Car insurance renewal used to be a very time-consuming process, involving waiting in long queues with lots of paperwork. However, in a digital age, renewing car insurance is the most convenient ...