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: up to 6 months jail (a 24-hour minimum on an impairment charge, no minimum on a per se 0.08 charge), a $600 to $1,000 fine, a 6-month license suspension, and a chemical dependency assessment and education course.
- Second offense, misdemeanor: 7 days to 1 year jail (5 days minimum on a per se charge), a $1,200 to $2,000 fine, a 1-year suspension, and treatment.
- Third offense, misdemeanor: 30 days to 1 year jail, a $2,500 to $5,000 fine, a 1-year suspension, and treatment.
- Fourth or subsequent, felony: 13 months to 2 years committed to the Department of Corrections, followed by a 5-year Montana State Prison term that must be suspended, and a $5,000 to $10,000 fine (MCA § 61-8-1008). A court may instead sentence up to 5 years in a treatment court program with the same fine.
Two things stand out. First, the mandatory minimum changes character: on an impairment charge a first offense can involve a day, a second starts at a week, a third at a month, and those minimums generally cannot be suspended. 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. For a second offense, a prior counts only if less than 10 years passed between that conviction and the new offense; for a third or later, every prior counts (MCA § 61-8-1011).
- 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, 6 months for a first refusal and 1 year for a second within 5 years, with no probationary license (MCA § 61-8-1032), 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.