Missouri DUI Laws: Penalties, License Suspension, and SR-22

A drunk driving arrest in Missouri sets two cases in motion at once. One runs through criminal court, where a judge can impose jail time and fines. The other runs through the Department of Revenue, which can take your license whether or not you are ever convicted. Understanding Missouri DUI laws means tracking both tracks, because a win on one side does not undo the other.¹

Missouri’s statutes use the term DWI, driving while intoxicated, rather than DUI, but the conduct and consequences are what most people mean when they search for either.

What Counts as Impaired Driving

For drivers 21 and older, the legal threshold is a blood alcohol concentration of 0.08%. Operating a vehicle at or above that level is the offense of driving with excessive blood alcohol content.² The related charge of driving while intoxicated does not require a specific number. It applies whenever alcohol, drugs, or a combination impair your ability to drive safely, so you can be charged even with a BAC below 0.08% if an officer documents signs of impairment.³

Two groups of drivers face tighter limits. Commercial drivers are held to 0.04% while operating a commercial vehicle.⁴ Drivers under 21 face a 0.02% threshold, which penalizes essentially any detectable alcohol.⁵

Drug impairment is prosecuted under the same DWI statute as alcohol, with no per se threshold. Prosecutors prove impairment through officer observations, field sobriety tests, drug recognition expert evaluations, and blood or urine results.³

Criminal Penalties by Offense Level

Sentencing escalates with each prior intoxication-related traffic offense. A prior offender has one such offense within the past five years; a persistent offender has two or more within ten years. The tiers climb from there.⁶

First offense (Class B misdemeanor): up to six months in jail and a fine up to $500.
Prior offender (Class A misdemeanor): up to one year in jail and a fine up to $2,000. This charge also applies on a first offense if a child under 17 was in the vehicle.
Persistent offender (Class E felony): up to four years in prison.
Aggravated offender (Class D felony): up to seven years in prison.
Chronic offender (Class C felony): three to ten years in prison.
Habitual offender (Class B felony): five to fifteen years in prison.⁷

Courts cannot grant a suspended imposition of sentence to anyone classified as a prior offender or higher. In practical terms, plea deals that keep a conviction off your record largely disappear once you have a history.⁷

When Someone Is Hurt or Killed

If a DWI causes harm to another person, the charge class jumps regardless of your prior record. Causing physical injury through criminal negligence while intoxicated is a Class E felony, serious physical injury is a Class D felony, and causing a death is a Class C felony. Each class moves up one further step when the victim is a law enforcement officer or emergency responder.⁷

Fatal cases carry the harshest exposure. Killing someone who was not a passenger in your vehicle, killing two or more people, or killing anyone while your BAC was at least 0.18% is a Class B felony with five to fifteen years. A second conviction for any of those fatal-DWI offenses is a Class A felony carrying ten to thirty years, or life.⁷

What Happens to Your License

The Department of Revenue acts on its own timeline. If a chemical test shows a BAC at or above the legal limit, the arresting officer takes your license at the scene and issues a temporary permit. With no prior alcohol- or drug-related traffic offense in the past five years, you face a 90-day suspension. If you do have a prior offense in that window, your license is revoked for one year.¹

This administrative action proceeds even if the criminal charge is later reduced or dismissed. The two tracks are independent, and a favorable outcome in court does not reverse the Department of Revenue’s suspension or revocation.

The 15-Day Hearing Deadline

You have fifteen days from the date of the notice to request an administrative hearing. If the notice was mailed, you get eighteen days from the mailing date.⁸⁹ Miss that window and the suspension or revocation takes effect automatically with no chance to challenge it. The hearing itself is narrow: whether the officer had reasonable grounds to stop and arrest you, and whether the chemical test was properly administered. Guilt on the criminal charge is not what the hearing decides.

Refusing the Breath or Blood Test

Missouri operates under an implied consent law. By driving on state roads, you have already agreed to submit to a breath, blood, saliva, or urine test if an officer has reasonable grounds to believe you are impaired, and an officer can require up to two tests from the same stop.¹⁰

Refusing carries its own penalties. The officer must warn you that your license will be revoked, and the refusal can be used as evidence against you in court.¹¹ The administrative penalty is a one-year revocation, which is longer than the 90-day suspension a first-time offender would face for failing the test. Refusing also does not block the DWI charge itself: officers can seek a search warrant for a blood draw, especially where the stop involves a serious-injury crash or a fatality.¹⁰

Driving During a Suspension

Losing your license does not always mean no driving at all. Courts and the Department of Revenue can grant limited driving privileges for specific purposes such as work, school, medical appointments, or substance abuse treatment, as long as you can show real hardship.¹²

For a 90-day suspension, you may qualify for an immediate restricted driving privilege by installing an ignition interlock device, which requires a clean breath sample to start the engine and at random intervals while you drive. For a one-year revocation, the waiting period before you can apply is longer, and an IID is generally required. Installation and monthly monitoring typically run $70 to $100 a month, paid by the driver.¹³

Not everyone qualifies. If your license was revoked for a DWI-related felony within the past five years, or you fall under certain other disqualifications, restricted privileges are not available. For people under a ten-year denial, a court can still grant limited privileges, but only after you present evidence that your habits and conduct show you are no longer a safety risk.¹²

Getting Your License Back

Before the Department of Revenue will reinstate your license, you must complete the Substance Awareness Traffic Offender Program, known as SATOP. Every person arrested for an alcohol- or drug-related traffic offense goes through a screening at an Offender Management Unit, which determines what level of treatment is required, ranging from a 10-hour education course for lower-risk drivers to at least 75 hours of treatment over 90 days for serious and repeat offenders. The screening alone costs $126 plus a $249 supplemental fee, and total program costs run from roughly $575 to more than $1,900 depending on your placement.¹⁴

Once your suspension or revocation period ends and SATOP is complete, you pay a $45 reinstatement fee to the Department of Revenue, file proof of financial responsibility through an SR-22 insurance form, and submit documentation of SATOP completion. If your license was revoked rather than suspended, you also need to retake the full driver examination. Longer revocations of five or ten years may require a court judgment before the Department of Revenue will process reinstatement.¹

SR-22 Insurance

Missouri requires you to file an SR-22 and keep it in force for two years from the start date of your suspension or revocation.¹ An SR-22 is not a separate policy. It is a form your insurer files with the Department of Revenue certifying that you carry at least the state minimum liability coverage: $25,000 for bodily injury per person, $50,000 per accident, and $25,000 for property damage.

The practical cost reaches well beyond the one-time filing fee of $25 to $50. Insurers treat a DWI as a major risk factor, and premiums typically rise sharply for years. If the policy lapses or is canceled during the SR-22 period, your insurer notifies the Department of Revenue and your license can be suspended again. The SR-22 does not drop off automatically at the end of two years; you have to ask your insurer to remove it.

If You Hold a Commercial Driver’s License

A commercial driver convicted of DWI faces the standard criminal and administrative penalties and loses the commercial license on top of them. That happens even when the offense occurs in a personal vehicle. Refusing a chemical test while operating a commercial vehicle triggers an immediate 24-hour out-of-service order, then a disqualification of at least one year for a first refusal and a lifetime disqualification for a second. A lifetime disqualification may be reduced to ten years under federal guidelines, though many employers will not hire a driver with that history.¹⁵

1
Missouri Department of Revenue. Driving While Intoxicated (DWI)
2
Missouri Revisor of Statutes. Missouri Code 577.012 – Driving With Excessive Blood Alcohol Content
3
Missouri Revisor of Statutes. Missouri Code 577.001 – Definitions
4
Missouri Revisor of Statutes. Missouri Code 302.700 – Citation of Law, Definitions
5
Missouri Revisor of Statutes. Missouri Code 302.505 – Suspension of Driving Privileges for Persons Under Twenty-One
6
Missouri Revisor of Statutes. Missouri Code 577.023 – Prior and Persistent Offender, Definitions
7
Missouri Revisor of Statutes. Missouri Code 577.010 – Driving While Intoxicated
8
Missouri Revisor of Statutes. Missouri Code 302.530 – Request for Administrative Review, When Made
9
Missouri Department of Revenue. 12 CSR 10-24.030 Hearings
10
Missouri Revisor of Statutes. Missouri Code 577.020 – Chemical Tests for Intoxication, Implied Consent
11
Missouri Revisor of Statutes. Missouri Code 577.041 – Refusal to Submit to Chemical Test
12
Missouri Revisor of Statutes. Missouri Code 302.309 – Limited Driving Privilege
13
Missouri Revisor of Statutes. Missouri Code 302.304 – Point Accumulation, Suspension and Revocation
14
Missouri Department of Mental Health. Substance Awareness Traffic Offender Program (SATOP)
15
Missouri Revisor of Statutes. Missouri Code 302.750 – Refusal to Submit, Commercial Driver