How long do I need to keep an SR22?
As long as your insurance policy is in force (active), your SR22 should remain valid. If your policy should be cancelled at any point while you are required to have an SR22 on file, your insurance company will notify the appropriate authorities. If you fail to maintain the appropriate filing, you driving privileges may be suspended. It is very important to keep the proper filings in place.
Generally speaking, you need the SR22 filing for 3 years, but this can vary based on many factors, including your conviction date and other dates imposed by the DMV (or similar entity in your state). If this is a second, third, or fourth offense, you may have extended requirements. Offenses beyond that could have other requirements. Rules may vary by location as well.