Missouri DWI Laws
Driving while intoxicated (DWI) is a serious offense in Missouri. The consequences of drinking and driving can be devastating — not only for the impaired driver but for innocent victims. Missouri law enforcement agencies, including the Missouri State Highway Patrol, are committed to keeping impaired drivers off the road.
What Is the Legal Limit?
In Missouri, it is illegal to operate a motor vehicle with a blood alcohol content (BAC) of:
• .08% or higher for drivers 21 and older
• .02% or higher for drivers under 21 (zero tolerance)
• .04% or higher for commercial vehicle drivers
You can also be arrested for DWI even if your BAC is below .08% if alcohol or drugs have impaired your ability to drive safely.
Consequences of DWI
First Offense
• Up to 6 months in jail
• Fine up to $500
• 30-day license suspension followed by 60-day restricted driving period
• Points assessed against your driving record
• Possible required installation of an ignition interlock device
Second Offense
• Up to 1 year in jail
• Fine up to $1,000
• 1-year license revocation
• Required ignition interlock device
• Possible vehicle seizure
Third and Subsequent Offenses
• Felony charges
• Up to 4 years in prison
• Fine up to $5,000
• 10-year license denial
The Hidden Costs
Beyond the legal penalties, a DWI conviction carries significant financial and personal costs:
• Attorney fees: $2,000 - $10,000+
• Increased insurance premiums: $4,500+ over 3 years
• Court costs and fines
• Substance abuse treatment programs
• Lost wages from jail time and court appearances
• Towing and impound fees
• Ignition interlock device costs
• Impact on employment and professional licenses
Make the Right Choice
• Designate a sober driver before going out
• Use ride-sharing services or public transportation
• Call a taxi or a friend for a ride
• Stay where you are until you are sober
• Never let a friend drive impaired
Report Impaired Drivers
If you see a driver you suspect is impaired, call 911 or the Missouri State Highway Patrol at 1-800-525-5555 or cellular *55. Provide the vehicle description, license plate number, location, and direction of travel.
Contact
Missouri State Highway Patrol
1510 East Elm Street, Jefferson City, MO 65101
Phone: (573) 751-3313
Website: www.statepatrol.dps.mo.gov
Emergency: 1-800-525-5555 or cellular *55