List Of What Is The Cheapest Auto Insurance In California 2023. On the other hand, chubb offers the overall most expensive rates at $156 a month — that’s over a 150% difference in price! The cheapest car insurance company in california overall is mercury at $85 per month for full coverage.

Web cheapest car insurance in california: Mercury is next at $133. Web to determine the best car insurance companies in california, cnbc select analyzed dozens of u.s.