How Prior DWIs Count in Minnesota — and the Stipulation Strategy

What Counts as a "Prior"

Minnesota uses the term "qualified prior impaired driving incident." It includes both:

• Prior impaired-driving convictions (DWI convictions); and
• Prior impaired-driving-related losses of license (such as an implied-consent revocation).

It can also include a qualifying juvenile adjudication that would have been a DWI if committed by an adult. Notably, it does not include a license action that came solely from an underage "Not-a-Drop" violation or certain restricted-license violations (see our underage DWI page).

The Two Different Lookback Periods

This is the single most important — and most confusing — point. Minnesota uses two different time windows depending on the consequence:

• Criminal charge (the degree): 10 years. For deciding whether a new DWI is a fourth-, third-, second-, or first-degree offense, the law counts qualified prior incidents within the ten years immediately before the current offense.
• License revocation: 20 years. For the driver's-license consequences (how long your license is revoked, interlock requirements, and related sanctions), Minnesota now uses a 20-year lookback — extended from 10 years effective August 1, 2025.

How Priors Raise the Degree

The number of aggravating factors (which include qualified priors within 10 years, a 0.16%+ reading, or a child in the vehicle) sets the degree:

• Fourth-degree (misdemeanor) — no aggravating factors;
• Third-degree (gross misdemeanor) — one aggravating factor;
• Second-degree (gross misdemeanor) — two or more; and
• First-degree (felony) — three qualified priors within 10 years, or a prior felony DWI.

(For the full penalty breakdown, see our DWI penalties and degrees page.)

The "No-Stacking" Rule

A single drunk-driving event usually produces both a conviction and a license revocation. Minnesota does not let the state count both as separate aggravating factors — each past incident counts only once. So one prior arrest doesn't become two strikes against you just because it generated two records.

The Stipulation Strategy: Keeping Priors From the Jury

Here's a key defense tool. In an enhanced DWI, a prior offense is technically an element the state would have to prove — which means, without intervention, the jury could hear that you have a prior DWI. That's obviously prejudicial. To prevent it, a defendant can stipulate to the validity of the prior conviction or revocation. When that happens:

• The prior is admitted for purposes of the enhancement, handled by the court;
• The jury never hears about the prior; and
• The jury decides only the current DWI on a clean slate, without the "he's done this before" prejudice.

An important caution: the benefit of stipulating can be lost if a related charge that depends on the same history — for example, driving after revocation — is tried alongside the DWI, because evidence of the revoked license may then come in anyway. Coordinating which charges go to the jury is part of using this strategy effectively.

Challenging Whether a Prior Even Counts

Not every alleged prior is automatically valid. Several issues can be raised:

• Unreviewed license revocations. An administrative license revocation that was never given the opportunity for review generally cannot be used to enhance a later DWI — using an unreviewed revocation that way can violate due process.
• Out-of-state priors. There's only a narrow basis to collaterally challenge out-of-state convictions, and whether a foreign offense qualifies as a Minnesota "prior" can be contested.
• Validity of the underlying prior. In limited circumstances, the constitutional validity of a prior (for example, an uncounseled plea) may be challenged.
• Notice. The state generally must give notice when it seeks an enhanced penalty based on priors.

Because each prior directly affects the degree, the penalties, and the license consequences, scrutinizing whether the priors are valid and correctly counted is one of the highest-value parts of defending an enhanced DWI.

Key Terms

• Qualified prior impaired driving incident: A prior DWI conviction or impaired-driving license loss that can enhance a new charge.
• 10-year window: The lookback for the criminal charge degree.
• 20-year window: The lookback for license revocation (since 2025).
• No-stacking: One past incident counts only once, even if it produced both a conviction and a revocation.
• Stipulation: Admitting a prior so the jury doesn't hear about it.