DUI Laws in Wisconsin: Penalties, BAC Limits & License Suspension

In Wisconsin, drunk driving is charged as OWI (Operating While Intoxicated). The standard per se limit is 0.08% blood alcohol concentration (BAC), and if you were arrested you are almost certainly facing a separate, fast-moving DMV action on top of any criminal case. If a Notice of Intent to Suspend was issued after your test, you generally have only 10 days (or 13 days, excluding weekends and holidays, if the notice was mailed to you) to request an administrative review hearing with the Wisconsin Department of Transportation (WisDOT) Division of Motor Vehicles — miss that window and a suspension takes effect automatically, even if the criminal charge is later reduced or dropped. Read the rest of this guide, but call a Wisconsin OWI defense lawyer or WisDOT today if that deadline is close.

What OWI Means in Wisconsin

Wisconsin does not use the terms "DUI" or "DWI" in its statutes. The offense is called Operating While Intoxicated (OWI) under Wis. Stat. § 346.63, and it covers driving under the influence of alcohol, a controlled substance, or a combination of the two, as well as driving with a "prohibited alcohol concentration" (PAC) at or above the legal limit. You'll see it written on paperwork as OWI, and sometimes informally as "drunk driving," but OWI is the term that matters on your citation and in court.

Wisconsin's BAC Limits

• General (non-commercial) drivers 21 and over: 0.08% BAC. This is the standard per se limit used nationwide.
• Commercial driver's license (CDL) holders: 0.04% BAC while operating a commercial motor vehicle.
• Drivers under 21: any detectable alcohol above 0.0% is illegal. Wisconsin's underage "absolute sobriety" (Not a Drop) rule makes it unlawful for a driver who hasn't reached the legal drinking age to operate a vehicle with any measurable alcohol concentration up to 0.08% — there is no small "tolerance" cushion like some other states use.
• Drivers with three or more prior OWI-related convictions: 0.02% BAC is the prohibited threshold, not 0.08%.
• High-BAC / mandatory interlock trigger: 0.15% or above. A BAC of 0.15% or greater — or a refusal to test — requires the court to order an ignition interlock device (IID) even on a first offense.

These thresholds come from Wis. Stat. § 346.63 and related sections. Confirm the current text with the Wisconsin State Legislature's statutes site (docs.legis.wisconsin.gov) or WisDOT before relying on any number, since amounts and triggers can change.

Implied Consent and Refusing a Chemical Test

By driving in Wisconsin, you've already agreed to the state's implied consent law (Wis. Stat. § 343.305): if an officer has probable cause to believe you were driving under the influence, you're required to submit to a chemical test of your breath, blood, or urine. Refusing has its own, separate consequences from an OWI conviction:

• A first refusal triggers a license revocation of one year — longer than the license consequence for a standard first-offense OWI conviction.
• A refusal also requires an ignition interlock device (IID), regardless of BAC.
• A refusal generally carries a waiting period during which you cannot drive at all before you can even apply for an occupational (work) license — unlike a straightforward first-offense conviction, where an occupational license is typically available sooner.
• Refusal is decided at its own hearing, separate from the OWI criminal case, and can also be used as evidence against you.

In short: refusing does not make the problem go away — it usually makes the license consequence worse, not better.

The Administrative Suspension: Your Clock Is Already Running

Separate from any criminal court case, WisDOT can suspend your license administratively through a Notice of Intent to Suspend issued after a failed test. This is a civil, DMV-side process that runs on its own timeline:

• Agency: Wisconsin Department of Transportation (WisDOT), Division of Motor Vehicles.
• Deadline to request a hearing: generally 10 days from when the notice was handed to you, or 13 days (excluding Saturdays, Sundays, and holidays) if it was mailed. The request must be in writing.
• If you miss it: a suspension — commonly a 6-month administrative suspension — automatically takes effect roughly 30 days after the notice, regardless of what later happens with the criminal charge.
• What the hearing decides: it is not a trial on guilt. A hearing examiner looks only at narrow issues, such as whether the officer had probable cause, whether proper procedures were followed, and whether the test results actually show a prohibited alcohol concentration.

Because this deadline is measured in a small number of days from your arrest, treat it as the single most time-critical item in this entire process. Contact WisDOT's Division of Motor Vehicles or a Wisconsin OWI defense lawyer immediately to confirm the exact deadline printed on your notice and get the hearing request filed on time.

First-Offense OWI Penalties in Wisconsin

A first OWI in Wisconsin is unusual compared to many states: it is generally treated as a civil forfeiture, not a crime, unless aggravating factors are present.

• Forfeiture (fine): a set statutory range applies to a bare first offense, plus separate mandatory surcharges — confirm the current total with the court or WisDOT, since surcharges are adjusted periodically.
• Jail: generally not imposed for a straightforward first offense. However, if a passenger under 16 was in the vehicle, the offense is enhanced — it can carry both a much higher fine and a jail term, and in some circumstances can be elevated further.
• License revocation: typically in roughly the 6-to-9-month range upon conviction, though the exact length depends on your record and any interlock order.
• Ignition interlock device (IID): not automatically required on a "clean" first offense — but it becomes mandatory if your BAC was 0.15% or higher, or if you refused testing.
• Occupational license: generally available sooner after a straight conviction than after a test refusal, provided you have no other license actions pending and meet any interlock condition.

Because exact dollar figures and surcharge totals change and depend on your specific facts, do not rely on any number you read online, including here — confirm the current forfeiture, surcharge, and jail exposure for your case with the clerk of court or a Wisconsin OWI defense attorney.

Lookback Period: How Long a Prior OWI Counts

Wisconsin uses one of the strictest lookback rules in the country. When counting prior OWI-related convictions to determine your offense number (2nd, 3rd, 4th, and so on), Wisconsin counts every qualifying prior conviction for life — there is no rolling 5-year or 10-year washout for that purpose. A conviction from decades ago can still count as a "prior" today. Separately, Wisconsin also applies a distinct 15-year window that can result in a lifetime license revocation for a 4th-or-later offense that follows closely on a prior one. Because lookback rules are technical and case-specific, have a Wisconsin attorney confirm exactly how your record will be counted.

When OWI Becomes a Felony in Wisconsin

Most first, second, and third OWI offenses in Wisconsin are handled as civil or misdemeanor matters. An OWI becomes a felony in Wisconsin when:

• It is your 4th offense or later — under current law, a 4th offense is an automatic felony regardless of how much time has passed since the prior offenses (this changed from an earlier rule that required a prior offense within five years).
• The offense involves great bodily harm or death to another person.
• Certain aggravating factors, including having a passenger under 16 in the vehicle combined with other factors, can also elevate an offense.

Felony OWI carries substantially higher stakes, including potential prison time rather than county jail, and permanent consequences to your criminal record. If you are facing a 4th-or-greater offense, or any offense involving an accident with injury, get a criminal defense attorney involved immediately — this is well beyond a self-help situation.

What to Do After a DUI/OWI Arrest in Wisconsin

1. Find the Notice of Intent to Suspend and read the deadline on it. If it gives you 10 days (or 13 if mailed) to request a hearing, calendar that date now — this is separate from your court date and does not wait for the criminal case.
2. Request the administrative review hearing in writing before the deadline, even if you plan to fight the criminal charge separately. This preserves your ability to keep driving while the case is pending.
3. Contact a Wisconsin OWI defense attorney promptly. Many offer free consultations, and the administrative hearing deadline is too short to research on your own.
4. Do not discuss the facts of the stop with anyone other than your attorney — not on social media, not with friends, not with the arresting agency.
5. Ask about occupational (work) license eligibility once any suspension or revocation is in place, since rules differ depending on whether the case involves a refusal or a conviction.
6. Track every deadline in your case — the administrative hearing request, the court arraignment date, and any interlock installation deadline are all on separate clocks.

This article is general legal information about Wisconsin law, not legal advice for your specific situation — confirm current statutes and deadlines with WisDOT or a licensed Wisconsin attorney.