Arrested for DWI
in Missouri?
A DWI arrest in Missouri is serious — but it doesn't have to define your future. Understanding the law is your first step. Get a free evaluation and connect with an experienced Missouri DWI attorney who can fight for you.
- BAC limit: 0.08% (0.02% if under 21)
- 5 years lookback period for prior offenses
- You have 15 days to request a license hearing
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Missouri DWI Penalties by Offense
Missouri uses a 5 years lookback period — prior convictions within that window escalate your penalties significantly.
First Offense
- JailUp to 6 months
- FineUp to $1,000
- License Suspension30 days
- Ignition InterlockNo
Second Offense
- ClassificationClass A Misdemeanor
- PenaltiesNot more than 1 year and not more than $2,000
- Lookback Window5 years
Third Offense & Beyond
- ClassificationClass E Felony
- PenaltiesNot less than 10 days or more than 4 years (Class E Felony)
- StatusFelony Offense
Aggravated DWI (BAC ≥ 0.15%): Higher BAC levels trigger enhanced penalties in Missouri. If your BAC was significantly above the legal limit, you may face mandatory minimums, additional fines, or elevated charges. An experienced Missouri DWI attorney can evaluate the specific circumstances of your case.
What Happens to Your License
Missouri operates a two-track system — your license faces consequences from both the court and the DMV independently. You must act fast on both fronts.
- 15-Day Rule: You have just 15 days from your arrest to request an administrative hearing to contest your license revocation. Miss this window and your license is automatically revoked.
- 1st Offense Suspension: 30 days
- Refusal Consequences: Refusing a chemical test triggers an automatic license revocation of 1 year under Missouri's implied consent law — separate from any criminal penalties.
- Ignition Interlock: Mandatory ignition interlock device required.
Missouri DWI Defense Strategies
Even if you failed a breath test, that doesn't mean your case is lost. Experienced Missouri DWI attorneys challenge charges on multiple grounds:
Special Missouri DWI Circumstances
Under 21
Missouri applies a strict BAC threshold of just 0.02% for drivers under 21. The penalties escalate quickly for repeat violations and can result in license suspension, fines, and required alcohol education programs. A DWI on a young driver's record can affect college applications, employment, and insurance for years.
Commercial Drivers
CDL holders in Missouri are held to a stricter 0.04% BAC standard while operating a commercial vehicle. A DWI conviction can result in a 1-year CDL disqualification for a first offense — and a lifetime ban for a second offense. Even an off-duty DWI in your personal vehicle can threaten your commercial license and livelihood.
Drug DWI
Missouri law prohibits driving under the influence of any drug — including prescription medications and marijuana — not just alcohol. You do not need to be above a BAC limit for drug dwi charges; impairment alone is sufficient. The same criminal penalties apply, and drug dwi cases often involve more complex evidence that an experienced attorney can challenge.
Don't Face Missouri's DWI System Alone
The 15-day deadline to protect your license is already counting down. Get your free evaluation now and find out exactly where you stand.
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Legal Disclaimer: The information on this page is for general educational purposes only and reflects laws as reported by the NHTSA Digest of Impaired Driving Laws. DWI laws in Missouri change frequently. This is not legal advice. Always consult a licensed Missouri DWI attorney for guidance specific to your situation.