Missouri Drinking Laws: Age, DWI, and License Consequences

Missouri drinking laws set the legal age at 21, criminalize driving with a blood alcohol concentration of 0.08% or higher, ban drinking behind the wheel of any moving vehicle, and leave most public consumption rules to individual cities and counties. Penalties escalate quickly with prior offenses, and a DWI conviction cannot be expunged.

Legal Drinking Age and Accepted ID

Anyone under 21 is prohibited from purchasing, attempting to purchase, or possessing alcohol in Missouri. A first violation is a class D misdemeanor; a second or later violation becomes a class A misdemeanor.1Missouri Revisor of Statutes. Missouri Revised Statutes Section 311.325 The age floor tracks the National Minimum Drinking Age Act, which cuts federal highway funding to states that let anyone under 21 purchase or publicly possess alcohol.2Office of the Law Revision Counsel. 23 USC 158 – National Minimum Drinking Age

To sell alcohol legally, a business must verify age with approved identification. Missouri accepts a valid, unexpired driver’s license from any state, a state-issued nondriver ID, a U.S. military ID, or a passport. The document must show a photo and a date of birth.3Missouri Revisor of Statutes. Missouri Revised Statutes Section 311.328 – Identification, Acceptable Forms

Anyone other than a parent or guardian who knowingly supplies alcohol to a person under 21 commits a misdemeanor, and a licensed business risks suspension or revocation of its liquor license by the Division of Alcohol and Tobacco Control.4Missouri Revisor of Statutes. Missouri Revised Statutes Section 311.310 – Sale to Minor

When and Where Alcohol Can Be Sold

On-premises alcohol consumption is prohibited statewide between 1:30 a.m. and 6:00 a.m.5Missouri Revisor of Statutes. Missouri Revised Statutes Section 311.480 Local governments can shorten those hours, so a bar’s closing time in one city may not match the next town over. Check the local ordinance before assuming the state window applies.

Unlike many states, Missouri lets grocery stores and convenience stores sell a full range of alcohol, including spirits, alongside beer and wine. That makes retail availability broad, though municipalities can still layer on their own restrictions.

Open Containers and Drinking in Public

It is a separate criminal offense to drink any alcoholic beverage while operating a moving motor vehicle on a public road in Missouri, regardless of BAC.6Missouri Revisor of Statutes. Missouri Revised Statutes Section 577.017 You do not have to be impaired. The act of drinking behind the wheel is enough.

Outside of vehicles, Missouri has no statewide ban on public alcohol consumption. Each city and county sets its own rule. Most major cities restrict open containers in public spaces, and some entertainment districts create carve-outs by local ordinance. Before drinking outdoors anywhere in Missouri, read the local rules rather than relying on the state’s silence.

DWI: BAC Limits and Charges

BAC Thresholds

Missouri applies three different BAC limits:

BAC is measured by breathalyzer or blood test. Under Missouri’s implied consent law, anyone arrested for a DWI-related offense is deemed to have already agreed to chemical testing. Refusal is still possible, but it triggers an automatic one-year license revocation, separate from any criminal case.9Missouri Department of Revenue. Refusal to Submit to an Alcohol or Drug Test FAQs

Offense Classifications and Jail Exposure

Missouri’s DWI statute tiers charges based on prior intoxication-related offenses:10Missouri Revisor of Statutes. Missouri Revised Statutes Section 577.010 – Driving While Intoxicated

  • First offense, no priors: class B misdemeanor, up to six months in jail.
  • Prior offender, one prior: class A misdemeanor, up to one year in jail, with a mandatory 10-day minimum before probation unless the offender completes a DWI court program or 30 days of community service.
  • Persistent offender, two priors: class E felony, up to four years in prison.
  • Aggravated offender, three priors: class D felony, up to seven years in prison.
  • Chronic offender, four priors: class C felony, up to 10 years in prison.
  • Habitual offender, five or more priors: class B felony, 5 to 15 years in prison.

The classification also jumps when someone gets hurt. A first-time DWI that causes physical injury to another person is automatically a class E felony. A DWI causing a death is a class C felony regardless of prior history, and rises to a class B felony if the driver’s BAC was 0.18% or higher.10Missouri Revisor of Statutes. Missouri Revised Statutes Section 577.010 – Driving While Intoxicated

High BAC readings force mandatory jail time even on a first offense. A BAC between 0.15% and 0.20% carries at least 48 hours of incarceration. A BAC above 0.20% carries at least five days.7Missouri Revisor of Statutes. Missouri Revised Statutes Section 577.012 – Driving With Excessive Blood Alcohol Content

What Happens to Your License

License penalties run on two separate tracks after a DWI arrest. The Department of Revenue acts administratively based on your BAC test result at the scene, and the court imposes its own penalties on conviction. Both can hit you for the same arrest.

Administrative Suspension

If you fail or refuse a BAC test, the officer takes your license and issues a 15-day temporary permit. What follows depends on your five-year record:11Missouri Department of Revenue. Restricted Driving Privilege (RDP) – Alcohol

  • First alcohol-related contact in five years: 30-day hard suspension, then a 60-day restricted driving privilege.
  • Second or later contact within five years: one-year revocation, no restricted privilege available.
  • Test refusal: one-year revocation.9Missouri Department of Revenue. Refusal to Submit to an Alcohol or Drug Test FAQs

First-time offenders can skip the 30-day hard suspension by requesting a 90-day restricted driving privilege. That requires installing an ignition interlock on every vehicle you drive, filing SR-22 insurance, and submitting the request within 15 days of the suspension notice.11Missouri Department of Revenue. Restricted Driving Privilege (RDP) – Alcohol

Court-Ordered License Consequences

Convictions carry additional license consequences on top of any administrative action:12Missouri Department of Revenue. Driving While Intoxicated (DWI)

  • First conviction: 90-day suspension, restricted driving privilege possible.
  • Second conviction: one-year revocation for point accumulation, with a potential five-year denial if both offenses fell within five years.
  • Third or later conviction: 10-year license denial.

Ignition Interlock

A court may order an ignition interlock for any first-time DWI conviction and must order one for any second or later offense. The device blocks the vehicle from starting if it detects alcohol on the driver’s breath, and the requirement runs for at least six months from the date the license is reinstated.13Missouri Revisor of Statutes. Missouri Revised Statutes Section 302.440 For a restricted driving privilege issued after a second or later offense, the interlock is mandatory. Installation runs roughly $50 to $170, with monthly monitoring of $50 to $120 plus calibration charges, all paid by the driver.

Exceptions and Situations People Ask About

Parents Supplying Their Own Children

Supplying alcohol to someone under 21 is a misdemeanor, but the statute expressly exempts a parent or guardian giving alcohol to their own minor child. Knowingly allowing an underage person to drink on your property is a class B misdemeanor, and that penalty also does not apply when the property owner is the minor’s parent or guardian. The statute allows one other pathway: alcohol administered by a licensed physician for medical purposes. There is no general religious-ceremony exception in the statute.4Missouri Revisor of Statutes. Missouri Revised Statutes Section 311.310 – Sale to Minor

Home Brewing

Anyone 21 or older can make beer, wine, or other alcohol at home without a license, provided it is for personal or family use and not for sale. The annual cap is 200 gallons per household with two or more adults 21 or older, or 100 gallons for a single-adult household. Home-brewed beer can also leave the property for organized events such as competitions, tastings, and judging held on premises operating under a temporary retail license or at certain tax-exempt organizations’ licensed premises.14Missouri Revisor of Statutes. Missouri Revised Statutes Section 311.055

Home distillation of spirits is a separate matter. Federal law bans it regardless of Missouri’s broader home production allowance; distilled spirits may only be produced at a facility registered with the Alcohol and Tobacco Tax and Trade Bureau. The federal home production exemption covers only beer and wine.15eCFR. 27 CFR 19.51 – Home Production of Distilled Spirits Prohibited

Dram Shop Claims Against Bars

Missouri lets injury victims sue a bar or restaurant that contributed to alcohol-related harm, but the standard is high. Under Section 537.053, the claim requires clear and convincing evidence that the establishment served someone it knew or should have known was under 21, or knowingly served a visibly intoxicated person. A high BAC by itself does not prove visible intoxication; the statute requires significantly uncoordinated physical action or significant physical dysfunction that the server could actually observe.16Missouri Revisor of Statutes. Missouri Revised Statutes Section 537.053

DWI Cannot Be Expunged

Section 610.140 excludes DWI, excessive BAC, and all related intoxication offenses from the crimes eligible for expungement. A DWI conviction stays on your record permanently. No waiting period, no petition process.17Missouri Revisor of Statutes. Missouri Revised Statutes Section 610.140 That reality is worth weighing early, because the consequences of even a first-offense DWI reach well past the immediate sentence.