An SR-22 isn't a type of car insurance. It's a certificate of financial responsibility that you may be required to file after a moving violation. Your insurer files the SR-22 form to prove you have liability coverage. While the form doesn't raise your rates, the violations requiring an SR-22 can lead to higher premiums.
The most affordable SR-22 insurance options are COUNTRY Financial at $843 per year and State Farm at $884. These rates apply to minimum coverage after a DUI. For non-owner SR-22 insurance, State Farm offers the lowest rate, $521 annually, followed by Allied at $906 per year.