DWI Penalties in Minnesota: The Four Degrees Explained

How the Degree Is Decided: Aggravating Factors

The starting point isn't the alcohol reading alone — it's the number of aggravating factors. Minnesota recognizes three:

• A qualified prior impaired driving incident within the past 10 years (a prior DWI conviction or loss of license — including from a boat, snowmobile, or ATV offense);
• An alcohol concentration of 0.16% or more (twice the legal limit); and
• Having a child under 16 in the vehicle (where the child is more than 36 months younger than the driver).

The more aggravating factors, the higher the degree — and the harsher the penalties.

The Four Degrees at a Glance

Fourth-Degree DWI — Misdemeanor (§ 169A.27)

A first DWI with no aggravating factors. As a misdemeanor, it carries a maximum of 90 days in jail and a $1,000 fine, though first offenders without aggravating factors often don't serve the maximum. There are still significant license consequences (see below).

Third-Degree DWI — Gross Misdemeanor (§ 169A.26)

A DWI with one aggravating factor (for example, a first offense with a 0.16%+ reading, or a second offense with no other factors). As a gross misdemeanor, the maximum is one year in jail and a $3,000 fine. Test-refusal cases also commonly fall here.

Second-Degree DWI — Gross Misdemeanor (§ 169A.25)

A DWI with two aggravating factors. Also a gross misdemeanor (up to one year and $3,000), but with tougher mandatory minimums — typically including a minimum period in jail before any house arrest or community-service release, plus a period of electronic alcohol monitoring. Second-degree is also significant because it can trigger vehicle forfeiture and plate impoundment.

First-Degree DWI — Felony (§ 169A.24)

This is the only felony DWI. It applies when a person has three or more qualified prior impaired driving incidents within 10 years, or has a prior felony DWI (or a prior felony criminal-vehicular-operation conviction). A first-degree felony DWI carries:

• A prison sentence generally in the range of three to seven years;
• A fine up to $14,000; and
• A mandatory minimum (a three-year minimum sentence applies, with detailed rules on how much must be served).

Felony first-degree DWI is treated as a serious felony for sentencing-guidelines purposes, and prior felony DWIs heavily affect the criminal-history score that determines the presumptive sentence.

Mandatory Minimums for Repeat Offenses

For gross-misdemeanor-level repeat DWIs, the law imposes escalating mandatory minimums based on the number of prior qualified incidents — for example, increasing minimum periods of incarceration (with a portion that must be served in custody) as the prior count rises, with community service available in some circumstances as a partial substitute. The exact minimums depend on how many priors you have, which is why an accurate count of qualified prior incidents is so important.

The Interlock Exception to Mandatory Minimums

The mandatory minimum jail terms above are not as absolute as they first appear. Minnesota law gives the court an important off-ramp: a judge is not required to impose the mandatory minimum sentence if the person is required, as a condition of probation, to drive only vehicles equipped with an ignition interlock device (Minn. Stat. 169A.275). In practice, this means enrolling in the ignition interlock program can be the path to avoiding the mandatory jail time that would otherwise apply to a repeat DWI, while also letting the person keep driving. This is one of the most consequential options in a repeat-DWI case, and it is a major reason interlock participation is so often central to the defense strategy.

Mandatory Conditional Release After a Felony DWI

For a felony (first-degree) DWI, there is a separate consequence that surprises many people: if the court commits the person to prison, Minnesota law requires a mandatory five-year conditional-release period that begins after release from prison (Minn. Stat. 169A.276). This is in addition to the prison time: a multi-year period of supervision during which the person must follow conditions set by the Commissioner of Corrections, which can include intensive supervision and continued abstinence requirements.

Two points make this especially important to understand before a felony DWI is resolved:

• It cannot be shortened or waived. The Commissioner cannot dismiss the person from supervision before the five-year term expires.
• A violation can send the person back to prison. If a condition of the conditional release is violated, the remaining portion of the five-year term can be served in custody.

This post-conviction conditional release is entirely separate from pretrial conditional release and bail (the conditions for getting out while the case is pending). One is about release before trial; this one is a mandatory supervision term that follows a felony prison sentence. Because the felony DWI consequences reach years beyond the sentence itself, the decisions made early in the case, including whether interlock and probation can avoid a prison commit in the first place, carry enormous weight.

"Can I Still Drive?" — Ignition Interlock and Limited Licenses

This is usually the first practical question. A DWI triggers a license revocation that is separate from the criminal penalties (see our pages on chemical testing and license consequences). In many cases, the path to driving during the revocation is the ignition interlock program — installing a breath-testing device on your vehicle in exchange for a limited or full license. The interlock framework has specific requirements that depend on your offense and history, and the rules have continued to change in recent years, so it's worth getting current advice about your eligibility and obligations.

Other Sentencing Features

• Consecutive sentences: In some situations, DWI sentences can or must run consecutively to other sentences.
• Stay of execution: A court may stay execution of a DWI sentence on conditions — commonly including completing the level of treatment recommended in a substance-use assessment.
• Long-term monitoring: For certain repeat offenders, the court can impose extended monitoring.
• Staggered sentencing: A judge may structure jail time in segments, with the possibility of reducing later segments based on compliance.
• Substance-use assessment: A chemical-use assessment is generally required and shapes treatment conditions.

The Importance of "Notice of Enhanced Penalty"

When the state seeks an enhanced (higher-degree) penalty based on prior incidents or aggravating factors, it generally must provide proper notice. How prior offenses are counted and proven — including the precise "within 10 years" calculation — can directly affect the degree you face, and is a frequent area of challenge.

What this means for you: Because the degree is built from aggravating factors and prior-offense counting, two cases with similar facts can carry very different consequences. Carefully scrutinizing how the state classifies the offense — the prior count, the timing, the alcohol concentration, the child-in-vehicle allegation — is often where real defense leverage lies, both for challenging the charge and for negotiating a lower degree.

Key Terms

• Degree (1st–4th): The classification that sets the penalty level for a DWI.
• Aggravating factor: A prior within 10 years, 0.16%+ alcohol concentration, or a child under 16 in the vehicle.
• Qualified prior impaired driving incident: A prior DWI conviction or loss of license used to enhance the degree.
• Mandatory minimum: The minimum sentence a court must impose for certain repeat or felony offenses.
• Ignition interlock: A breath-testing device that can allow driving during a revocation.