The very short answer is 10 years, at a minimum. Research came up with Florida retaining the mark on your driving record for 75 years. Tennessee retains it for life. In the case of the Florida retention, given a DUI offender is likely to be over 15, this means an offender will have to live deep into the 90s in age before the offense comes off the record. It has the same effect as Tennessee. In the fairly recent past, many states have had shorter durations, and even insurance companies had various durations, depending on the state where the offender held a driving license. But now, every state holds a minimum 10 year duration for a DUI on your driving record.
That being said, there are a number of online sites touting your ability to get post-conviction relief in various ways to various levels, even to getting the conviction set aside, as if it was a “not guilty” judgment. You allegedly can do some things in some states using various methods, which they will sell to you for a few dollars more. One very low pressure site, [http://www.myduiattorney.org/what-happens-after-a-dui-conviction/how-do-i-get-this-dwi-dui-off-my-record.html] is by an attorney who goes through quite a bit of information as to what the possibilities are, in general. Good advice is given with the words to consult a DUI attorney in the conviction state. But, this attorney also has what seems to be a relatively inexpensive document one can purchase on things to consider and that you can do.
Be aware, as is usual, that state rules on a DUI conviction are different depending on the state. Some states simply do not allow any reduction or change or “lessening” of the effects of a DUI conviction – the mark on your driving record stays for the entire duration. In those states, contributors say to also simply save your money, as an attorney will be unable to assist you in any way. But, a free consultation never hurts.
Another possibly useful site is [http://search.dmv.org/dmv/out-of-state-dui]. This site has links and limited information about out of state DUI convictions, impact, insurance, and the like. It is essential serving as a portal to other sites and information, mainly by state (due to the varieties). The site also has some more general DMV links and information, so it is broader than just DUI.
As a note, more than a few sites and contributors wanted readers to be aware that there is also a criminal record that the state has and that this is different that the driving record. Just an FYI …. Handling and dealing with the criminal record is a whole other situation, again, varying by state. Consult a lawyer in this case.
One last item found. A site, [http://www.duivsdwi.org/], goes through a discussion that some states have a clear distinction between DUI and DWI, “driving while intoxicated”. DWI is often treated as a lesser offense. DUI can sometimes be reduced to DWI.