Will I Go to Jail for a First DWI in Minnesota?

The Short Answer

A first-time DWI without aggravating factors is charged as a fourth-degree DWI, the lowest level — a misdemeanor. It has no mandatory minimum jail time. While the statutory maximum is up to 90 days in jail, in practice most first offenders are sentenced to probation with conditions rather than jail, along with fines, a chemical-use assessment, and license consequences handled separately.

So for a typical first offense, the honest answer is: you probably will not serve jail time — but "probably" depends entirely on the facts.

What Changes the Answer: Aggravating Factors

Minnesota classifies DWIs into four degrees based on aggravating factors. Even on a first offense, certain factors raise the charge and increase the odds of jail:

• A high alcohol concentration (0.16 or more) — this adds an aggravating factor and elevates a first offense to third-degree DWI, a gross misdemeanor.
• A child in the vehicle — treated as an aggravating factor.
• Test refusal — refusing a lawful chemical test is itself a gross-misdemeanor-level factor.

What this means for you: A "first DWI" with a 0.16+ reading, a refusal, or a child in the car is a different and more serious case than a clean first-offense fourth-degree DWI. The presence of even one aggravating factor changes the charge, the exposure, and the likelihood that a prosecutor pushes for jail. This is why two people who both call it "my first DWI" can face very different situations.

What About Repeat DWIs? Mandatory Minimums — and the Ways Around Them

A first offense has no mandatory minimum, but repeat DWIs do. Under Minn. Stat. § 169A.275, a second DWI within ten years generally requires at least 30 days of incarceration (with at least 48 hours served consecutively), and the minimums climb with each additional prior. Importantly, though, Minnesota law builds in several ways a court can depart from — or convert — those minimums:

• Substantial mitigating factors. The court may, on its own motion (or the prosecutor's), sentence without regard to the mandatory minimum if it finds substantial mitigating factors exist and states its reasons on the record.
• Intensive probation program. The court may also disregard the mandatory minimum if the defendant is placed on probation and ordered to participate in an intensive probation program for repeat DWI offenders (§ 169A.74).
• The ignition interlock exception. This is a significant one: a judge is not required to impose the mandatory minimum if the judge requires the person, as a condition of probation, to drive only vehicles equipped with an ignition interlock device (§ 171.306). In practice, enrolling in the interlock program can be a path to avoiding mandatory jail on some repeat offenses.

Even where some jail is required, the law allows portions to be served on home detention, electronic monitoring, or community work service (eight hours for each day less than the minimum) rather than physically in jail.

What this means for you: "Mandatory minimum" does not automatically mean "you're going to jail for 30 days." On repeat offenses, the interlock exception, an intensive probation program, mitigating factors, and served-time alternatives can each change the actual custody outcome — but they require the right motion, the right conditions, and often the right program enrollment. This is exactly the kind of thing that turns on how the case is handled.

The Two Separate Tracks: Criminal and License

It's important to understand that a DWI in Minnesota runs on two independent tracks:

• The criminal case — which determines jail, probation, fines, and whether you have a conviction.
• The administrative license case — handled by the Department of Public Safety, which can revoke your license, impound plates, or require ignition interlock regardless of the criminal outcome, and on a very short deadline.

So even if jail isn't likely, the license consequences of a first DWI are real and move fast — which is its own reason to act quickly. (See our pages on implied consent and license revocation and what a DWI is.)

What Usually Happens on a First Offense

For a typical fourth-degree first DWI, a common outcome involves probation (often one to two years), a fine, a required chemical-use assessment with any recommended follow-up, and possible conditions like a victim-impact panel — but not jail. The exact outcome depends on the county, the facts, and how the case is handled.

What this means for you: "Probably no jail" is not the same as "nothing to worry about." A DWI conviction still creates a criminal record you'll have to disclose, carries license and financial consequences, and raises the stakes on any future offense within the lookback period. And where aggravating factors exist, the picture shifts. This is exactly where an early case review matters — challenging the stop, the testing, or the aggravating factors can change the outcome.