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Under 21 |
.00% Montana is a zero tolerance state |
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21 or older |
.08% |
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Commercial |
.04% |
** BAC = blood alcohol content
How many drinks does it take? Check the BAC chart.
Montana has an implied consent law. That means that if you refuse to submit to a chemical test you will be subject to a fine and automatic license suspension. Learn more about Montana’s implied consent law.
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1st Offense |
2d Offense |
3rd Offense |
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Refusal to take test |
6 month license suspension |
1 year license suspension |
1 year license suspension |
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1st Offense |
2d Offense |
3rd Offense |
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Minimum Jail |
1 day jail |
5 days jail |
10 days jail |
Lookback Period: 5 years (Period of time that prior DUIs are relevant for sentencing. Also known as a “washout” period.)
A defendant might receive a "wet reckless," or a conviction of reckless driving involving alcohol, as a result of a plea bargain in which a charge of drunk driving is reduced to a case of reckless driving. There is no statutory provision on whether a wet reckless plea bargain will be accepted in Montana, but it's possible a lawyer may be able to create a plea bargain for you.
More Information: First Offense DUI in Montana
Disclaimer: We try to keep the information provided here up to date. However, laws often change, as do their interpretation and application. Different jurisdictions within a state may enforce the laws in different ways. For that reason, we recommended that you seek the advice of a local attorney familiar with DUI cases in your area.
More Information: Second Offense DUI in Montana
More Information: Third Offense DUI in Montana
Montana Drunk Driving and Wet Reckless Laws - Nolo.com
The State of Montana prohibits driving with a .08 percentage or above, blood alcohol concentration (BAC). The .08 measurement is the standard used across the United States for the "impaired" driver. The State of Montana has lower BAC limits for minors and drivers of commercial vehicles. In addition to the .08 BAC law, Montana also considers a .04 percent a DUI if that fact is considered with other competent evidence.
How many drinks does it take to reach the legal limit in Montana?
It is difficult to determine if a person has reached the .08 legal
limit. There are many factors that contribute to a BAC score, including
sex, weight, genetics and the amount of time that has passed between
drinks. There are BAC calculators and charts that can help you
determine your individual BAC score, however these devices should be
used as reference tools only and should never be used to determine if
an individual will be able to drive safely.
The best answer is not to drink and drive . The State of Montana has strict laws for drunk driving, and when you drink and drive in Montana, you risk your freedom, finances and your future.
The first time you are convicted of a drunk driving offense in the State of Montana you will serve a minimum of 1 day up to 6 months in jail. You will also be fined from $300-$1,000. If there was a passenger under the age of 16 in the vehicle at the time of the arrest, you will serve a minimum of 2 days in jail or up to 12 months, and receive a fine from $600-$2,000. Your drivers license will also be suspended for 6 months.
The second time you are arrested for drunk driving in Montana you will be fined from $600-$1,000. You will also be ordered to serve a minimum of 7 days in jail up to 6 months. If there was a passenger under the age of 16 in the vehicle at the time of the arrest, you will serve a minimum of 14 days, or up to 12 months in jail and receive a fine from $1,200-$2,000. Some of the imprisonment may be suspended if the person completes a chemical dependence treatment program. The court may order you to install an ignition interlock device on your vehicle at your own expense during your probationary period. Your drivers license will be suspended for 1 year and your vehicle may be forfeited on the second or subsequent DUI.
For your 3rd drunk driving conviction in the State of Montana you will be ordered to serve a minimum of 30 days in jail or up to 1 year.
You will also be fined from $1,000-$5,000. If there was a passenger under the age of 16 in the vehicle at the time of the arrest, you will serve a minimum of 60 days, or up to 12 months in jail and receive a fine from $2,000-$10,000.
The court may order you to install an ignition interlock device on your vehicle at your own expense during your probationary period. Your drivers license will be suspended for at least 1 year your vehicle may be forfeited on the second or subsequent DUI.
Note: A 4th drunk driving conviction in the State of Montana is a felony, the convicted driver could receive up to 5 years in jail and a $10,000 fine.
If you drive in the State of Montana the implied consent law says all drivers agree to give their consent to submit to a chemical test of their blood, breath or urine if they are suspected of driving under the influence. If you refuse to submit to such a test your drivers license will be suspended for 6 months on the first refusal. Subsequent refusals will result in a 1 year drivers license suspension with the possibility of a court ordered ignition interlock device installation on your vehicle, at your own expense.
State of Montana Website - More DUI Information