Criminal Defense

The Difference Between a First DUI and a Repeat DUI in Montana

Montana DUI penalties escalate sharply with each offense, and the fourth is a felony. What changes at each step, and what counts as a prior.

Written by

Misty Gaubatz, Partner, A&M Law

Licensed Montana attorney and co-founder of A&M Law. Over two decades in the practice of law focusing on family law, criminal defense, and DUI defense, with federal and state court experience and a Certificate in Mediation.

Montana Bar #122346+ years as an attorney, with over two decades working in the lawReviewed by Ashley HurlbertLast reviewed: July 18, 2026

People facing a second DUI often expect it to feel like the first one, slightly worse. It does not. Montana's structure escalates deliberately at each level, and the jump is steep enough that the way a first case is handled shapes everything that could follow.

How the Levels Escalate

Our DUI defense page carries the full penalty breakdown. In summary:

First offense, misdemeanor: 24 hours to 6 months jail, a fine, roughly a 6-month license suspension, and a chemical-dependency evaluation.
Second offense, misdemeanor: 7 days to 1 year jail, higher fines, roughly a 1-year suspension, and treatment.
Third offense, misdemeanor: 30 days to 1 year jail, substantial fines, a longer suspension, and treatment.
Fourth or subsequent, felony: up to 5 years in Montana State Prison, major fines, and long-term license loss.

Two things stand out. First, the mandatory minimum changes character: a first offense can involve a day, a second starts at a week, a third at a month. Second, the fourth offense is not a worse misdemeanor. It is a felony, which changes your life in ways the jail number alone does not convey, including firearm rights, employment, and licensing.

What Actually Counts as a Prior

This is where these cases are genuinely fought, and where an assumption can cost you a level.

Whether an earlier matter counts as a prior for enhancement is not always obvious. Questions that come up regularly:

Out-of-state convictions. Whether another state's offense counts here depends on what it actually was, not just its name.
Older convictions, and how the passage of time is treated.
Prior cases where you were unrepresented, which can raise questions about whether the conviction is properly usable to enhance.
Records that are wrong. Criminal histories contain errors, including cases attributed to the wrong person or resolutions recorded inaccurately.

If the State is treating your case as a second or third offense, the first thing worth examining is whether the priors it is counting actually qualify. Knocking one out can move you an entire level, and that is frequently worth more than anything else available in the case.

The License Case Is Separate

Worth repeating because it catches people every time: the administrative action against your driver's license runs on its own track, separate from the criminal case, and it moves quickly. Refusing a breath or blood test triggers its own suspension, typically around 6 months for a first refusal and longer afterward, independent of what happens in court.

You can be acquitted and still lose your license if the administrative side went unaddressed.

Why the First Case Matters So Much

This is the practical point of the whole page. Because the second offense is dramatically worse than the first, the resolution of a first case is not just about that case. It sets the baseline for any future one.

People sometimes take the fastest available resolution on a first DUI to make it go away, without considering what it does if there is ever a second. That is a decision worth making deliberately, with the escalation in view.

If You Are Facing a Repeat Charge

The exposure is real and so are the defenses. The stop, the testing, the procedures followed, and the validity of each claimed prior are all worth examining. Our DUI defense page explains our approach, and if the case involves marijuana, our THC DUI page covers that standard. Call 406-830-3060.

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FAQ

Frequently Asked Questions

Does an out-of-state DUI count as a prior in Montana?

It can, but it is not automatic and it is one of the more productive things to examine. Whether another state's offense counts for enhancement here depends on what the offense actually was rather than what it was called. If the State is treating your case as a second or third offense, checking whether each claimed prior genuinely qualifies is worth doing, because removing one can move you down an entire level.

How much worse is a second DUI than a first?

Substantially. A first offense carries 24 hours to 6 months of jail exposure and roughly a 6-month suspension. A second starts at 7 days and runs to a year, with higher fines, roughly a 1-year suspension, and treatment. The mandatory minimum changes character, from a day to a week, which is why how a first case resolves matters well beyond that case.

When does a Montana DUI become a felony?

At a fourth or subsequent offense, which carries up to 5 years in Montana State Prison along with major fines and long-term license loss. That is not simply a worse misdemeanor. A felony conviction affects firearm rights, employment, and professional licensing in ways the jail figure alone does not capture.

Can I lose my license even if I beat the criminal charge?

Yes. The administrative action against your license runs separately from the criminal case and moves quickly, and refusing a breath or blood test triggers its own suspension regardless of the court outcome. People are acquitted and still lose driving privileges because nobody addressed the administrative side in time.

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