Wisconsin OWI Facts
Authoritative overview of Wisconsin impaired driving laws and consequences.
BAC limits
- 21 and older: 0.08% BAC legal limit
- Commercial drivers: 0.04% BAC
- Under 21: Zero tolerance — any detectable alcohol
Implied consent
By driving on Wisconsin roads, you consent to chemical testing if lawfully arrested for impaired driving. Refusal triggers automatic license revocation and may be used in court.
Penalty overview
Penalties escalate with each offense — fines, jail time, license revocation, mandatory assessment, and ignition interlock. A first OWI is not "just a ticket" in Wisconsin.
Ignition interlock
Required for many OWI convictions. The device prevents your vehicle from starting if alcohol is detected. Installation and monthly fees are your responsibility.