This overview outlines the escalating legal classifications and penalties for Driving While Intoxicated (DWI) in Missouri as of 2025-2026. Each subsequent offense increases the severity of the charge, mandatory jail time, potential fines, and prison time.

Other posts in this series are here.

The Escalation of Missouri DWI Offenses

1. First-Time Offender

1. Classification: Class B Misdemeanor.
2. Standard Penalty: Up to 6 months in jail and a fine of up to $1,000.
3. Mandatory “Shock” Jail: While often 0 days for low BAC , a BAC of 0.15–0.20 requires 48 hours, and a BAC over 0.20 requires 5 days of mandatory jail time.

2. Prior Offender

• Definition: One prior intoxication-related conviction within five years of the current offense.
• Classification: Class A Misdemeanor.
• Standard Penalty: Up to 1 year in jail and a fine of up to $2,000.
• Mandatory Minimum: Must serve 10 days in jail before becoming eligible for probation.
• Alternatives: The jail time may be waived in exchange for 30 days (240 hours) of community service or successful completion of a DWI Court program.

3. Persistent Offender (Crossing into Felony Territory)

• Definition: Two or more prior intoxication-related convictions (no time limit applies to these priors).
• Classification: Class E Felony.
• Standard Penalty: Up to 4 years in prison and a fine of up to $10,000.
• Mandatory Minimum: Must serve 30 days in jail before becoming eligible for probation.
• Alternatives: The jail time may be waived in exchange for 60 days (480 hours) of community service.

4. Aggravated Offender

• Definition: Three or more prior intoxication-related convictions.
• Classification: Class D Felony.
• Standard Penalty: Up to 7 years in prison and a fine of up to $10,000.
• Mandatory Minimum: Must serve 60 days in jail. At this level, the option to perform community service to avoid jail is generally removed by statute.

5. Chronic Offender

• Definition: Four or more prior intoxication-related convictions.
• Classification: Class C Felony.
  Standard Penalty: 3 to 10 years in prison and a fine of up to $10,000.
• Mandatory Minimum: Must serve 2 years in prison before becoming eligible for probation or parole.

6. Habitual Offender

• Definition: Five or more prior intoxication-related convictions.
• Classification: Class B Felony.
• Standard Penalty: 5 to 15 years in prison.
• Mandatory Minimum: Must serve 2 years in prison before becoming eligible for probation or parole.