SR-22 rules are set state by state, and the differences are not cosmetic: how long you need one, what date the clock starts from, and even whether the state uses an SR-22 at all vary. Each guide below gives that state's filing period and what its own agency publishes, linked to the page that says it and dated.
One thing worth knowing before you look for your state: several of these states do not use the SR-22 form at all. Pennsylvania, New Jersey, New York, Minnesota, Michigan, Oklahoma, North Carolina and Kentucky each handle proof of financial responsibility a different way — New York verifies coverage electronically through the registration, North Carolina uses the DL-123 and FS-1, Minnesota certifies an insurance card as non-cancelable for up to twelve months, and Oklahoma repealed the statutes that created certificate-of-insurance proof in 2009. If you are in one of those states, do not assume the standard SR-22 process applies to you: check Pennsylvania, New Jersey, New York, Minnesota, Michigan, Oklahoma, North Carolina or Kentucky for what your state actually requires. Kentucky is the least settled of them: its own agency describes no SR-22 anywhere, while several commercial guides insist it has one, and that disagreement is set out on its page rather than resolved by picking a side — reading its statute book explains why, because 51 of the 66 sections of its financial-responsibility chapter are marked repealed. Minnesota is the subtlest: its rule turns on repetition rather than on the offence, so a first withdrawal and a second one are not the same case. The current count, and the reasoning for each state, belongs to the guide to the states that do not use an SR-22 rather than to this page, so that one page owns the number and it cannot go stale here without going stale there.
A caution that applies across the section: “the term does not appear in the statute” and “the state does not use it” are different findings. Texas requires the filing and the string “SR-22” appears nowhere in the chapter that requires it — the label is administrative, sitting on top of a duty the law words differently.
A number of state servers refuse connections from ours — some legislatures, some motor-vehicle agencies, and in one case a statute site that has been replaced by a JavaScript application serving no statutory text at all. Where that happens the guide cites the state's own address alongside the archived copy of that same page that was actually read, gives the capture date, and says which one it read. It is stated on the page rather than papered over, and no commercial source is ever substituted in place of the official one.
