Minnesota Doubled the DWI Look-Back to 20 Years. Here Is What That Actually Changes.

What Is a "Look-Back Period"?

A look-back period (sometimes called a "washout" period) is the window of time during which a past DWI counts as a "prior" offense. If your earlier DWI falls inside that window, your new case is treated as a repeat offense, which carries heavier consequences. If it falls outside the window, it generally does not enhance the new case. Minnesota just doubled the size of that window for important parts of a DWI case.

What Actually Changed on August 1, 2025

• The window doubled. For license revocation and ignition interlock purposes, Minnesota now counts prior DWI incidents from the past 20 years, up from 10.
• Old offenses can count again. A prior conviction or revocation from 12, 15, or 18 years ago — which used to "wash out" — can now be treated as a prior, increasing penalties on a new offense.
• Interlock requirements expanded. Drivers with prior offenses within the 20-year window face longer mandatory ignition interlock periods, with the most serious cases (such as crashes causing death or severe injury) facing the possibility of very long or lifetime requirements.
• Treatment requirements tightened. Regaining full driving privileges after a DWI now generally requires completing a licensed substance use disorder treatment program.
• Driving without a required interlock is now a crime. What used to be an administrative problem can now be charged criminally.

The Distinction That Matters: Civil vs. Criminal

This is the point most summaries blur, and it matters for understanding your situation. A DWI arrest creates two separate cases:

• The criminal case — the prosecution that can result in a conviction and criminal penalties; and
• The civil/administrative case — the driver's license revocation and ignition interlock consequences handled through the Department of Public Safety (implied consent).

The doubled 20-year look-back most directly reshapes the civil/administrative side — how long you lose your license and how long you must use an interlock. The way priors are counted for criminal charging and degree follows its own statutory framework. In plain terms: an old offense can lengthen your license revocation and interlock time under the new law even in situations where the criminal charge is analyzed differently. Because the two cases run on different tracks and different timelines, both need attention from the start. (See our pages on the DWI criminal case versus the implied-consent case, and on implied consent and license revocation.)

A Concrete Example

Suppose you were convicted of a DWI in 2007 and had no trouble since. Under the old 10-year rule, that 2007 offense would not count toward enhancing a new 2026 arrest. Under the new 20-year look-back, it does — which can mean a mandatory multi-year license revocation and an ignition interlock requirement you would not have faced before the law changed. The old offense did not change; the law counting it did.

Why This Hits Repeat-Offense Cases Hardest

The longer window is designed to catch repeat offenders, and that is exactly where it bites. Each additional prior within the 20 years can push a case into longer revocation periods and longer interlock terms, and in the most serious cases can trigger the harshest reinstatement conditions. If you have any prior DWI history at all — even something you considered ancient — it is now worth confirming exactly how it will be counted before making decisions about your new case.

What You Can Do About It

Because the administrative consequences can attach quickly and the criminal case proceeds on its own track, timing matters. Two things in particular are worth acting on early: the short window to challenge the license revocation (the implied-consent side has strict deadlines), and a careful review of whether each claimed prior actually qualifies as a prior under the statute. Not every old entry counts the same way, and the details of how a prior was resolved can affect whether and how it enhances a new case.

Key Terms

• Look-back (washout) period: The window during which a past DWI counts as a prior offense — now 20 years for revocation and interlock.
• HF 2130: The 2025 Minnesota law, effective August 1, 2025, that doubled the look-back and expanded interlock and treatment requirements.
• Ignition interlock (IID): A breath-test device wired to the ignition; the engine won't start without a clean sample.
• Implied consent: The civil/administrative license process that runs separately from the criminal DWI case.
• Enhancement: Increasing the consequences of a new offense because of qualifying prior offenses.