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what is the legal limit for alcohol in wisconsin

Quick answer

For most adult drivers in Wisconsin the prohibited alcohol concentration for a first offense is 0.08 or greater, according to the Wisconsin DMV. It is 0.04 for commercial vehicle drivers, 0.02 for drivers with three or more prior OWI convictions, and any amount is illegal under age 21.

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In this article
  1. The limits by driver type
  2. What the numbers mean
  3. Important caveats

The limits by driver type

Driver Limit (BAC)
First offense, most adult drivers 0.08 or greater
Operating a commercial vehicle 0.04 or greater
Three or more prior OWI convictions Above 0.02
Under 21 Any amount is illegal

What the numbers mean

These figures are blood or breath alcohol concentration, not a number of drinks. How fast your BAC rises depends on your body, food, and the time between drinks, so no drink count is a safe guide.

The state calls the threshold the Prohibited Alcohol Concentration (PAC). Wisconsin charges the offense as OWI, short for operating while intoxicated.

Important caveats

Being under the numbers above does not make driving safe or guarantee you cannot be charged. We did not find a page that explains every case, so read the DMV page or ask a Wisconsin lawyer about your situation.

Laws change. Check the Wisconsin DMV page before relying on this. To count drinks, see our standard drink calculator, and for other states see laws and travel.

People also ask

What is the legal limit for alcohol in Wisconsin?

For a first offense the Prohibited Alcohol Concentration is 0.08 or greater, per the Wisconsin DMV.

What is the limit for commercial drivers in Wisconsin?

The DMV lists 0.04 for those operating a commercial vehicle at the time of the stop.

Can drivers under 21 drink any alcohol before driving in Wisconsin?

No. The DMV says driving with any amount of alcohol in the system is illegal under age 21.

General information only, not medical or legal advice. If you have a health condition, take medicines or are pregnant, ask your doctor before drinking alcohol. Never drink and drive.

Sources

  1. Wisconsin DMV: Impaired driving (OWI) in Wisconsin, read 4 Nov 2026
Written by A to Z Alcohol Editorial Team · Published May 9, 2026 · Updated Nov 4, 2026
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