Montana DUI Laws

Montana Drunk Driving Laws, Penalties, and Consequences

Montana's DUI laws prohibit driving while under the influence of drugs or alcohol. Read more about how DUI is defined in Montana and the penalties you'll face for a first, second, and third conviction.

Montana First-Offense DUI

A first DUI conviction is a misdemeanor in Montana and carries fines, license suspension, and possible jail time. However, the specific penalties depend on the circumstances surrounding the offense.

Montana Second-Offense DUI

A second conviction is a misdemeanor in Montana and—depending on the circumstances—can carry with it a fine, license suspension, possible jail time, and possible vehicle forfeiture.

Montana Third-Offense DUI

If a Montana driver has two prior DUIs within a lifetime, a subsequent DUI will be considered a third offense. (Priors are counted differently for determining what qualifies as a first and second offense.) A third DUI conviction is a misdemeanor in Montana and—depending on the circumstances—can carry with it fines, license suspension, jail time, and vehicle forfeiture.

What Is a Felony DUI in Montana?

If you're arrested for driving under the influence (DUI) and you have three or more prior convictions or the current offense involved an accident, you may be facing felony charges and possible prison time

Montana's Boating Under the Influence (BUI) Laws and Penalties

Montana law prohibits operating a motorboat while under the influence of drugs or alcohol. The term “motorboat” means “a vessel, including a personal watercraft or pontoon, propelled by any machinery, motor, or engine of any description, whether or not the machinery, motor, or engine is the principal source of propulsion.” (Mont. Code Ann.

Montana Open Container Laws, Penalties, and Consequences

Montana law prohibits any person from knowingly possessing an open alcoholic beverage container in a vehicle on a highway or public road. This restriction applies to all persons within the car, including the driver and passengers.

Montana Drugged Driving Laws

What is considered drugged driving in Montana and what are the penalties if you are convicted?

Montana’s Underage DUI Laws

How an underage DUI differs from a standard DUI in Montana and the penalties you can expect.

Montana’s Implied Consent Law and Refusing Alcohol Testing

Montana's implied consent law requires all drivers who are lawfully stopped for driving under the influence to take a blood, breath, or urine test at the request of an officer