Drinking Laws in Wisconsin: Age, OWI, and Open Containers

The drinking laws in Wisconsin set the legal age at 21, allow underage people to drink only when a parent, guardian, or spouse of legal age is actively supervising, treat a first-offense OWI as a civil forfeiture while escalating sharply from there, and require open containers to be stored outside the passenger area of any vehicle on a highway. The details below cover who can drink, when alcohol can be sold, what happens if you drive after drinking, and what liability you take on if you serve others.

Drinking Age and the Parental Exception

You must be 21 to purchase or consume alcohol in Wisconsin. The state carves out one notable exception: an underage person may possess and consume alcohol when accompanied by a parent, guardian, or spouse who has reached the legal drinking age.¹ The exception works in private homes and at licensed bars and restaurants, though any business can still refuse to serve the underage person regardless of consent.

“Accompanied” is read strictly. A Wisconsin appellate court found that parents who hosted a party and told their son not to drink where guests could see him were not accompanying him within the meaning of the statute, because they were neither supervising nor controlling his drinking.² The supervising adult needs to be in the same immediate area and aware of what the underage person is drinking. Step away, and the protection goes with you.

Penalties for Underage Drinking

Underage violations split into two tracks. Simple possession or consumption away from licensed premises carries lighter penalties; possession or consumption on licensed premises, use of a fake ID, or having someone else buy alcohol carries the stiffer schedule.³

For simple possession or consumption off licensed premises:

First offense: $100 to $200 forfeiture, possible license suspension, possible community service.
Second offense within 12 months: $200 to $300 forfeiture, with license suspension mandatory if a motor vehicle was involved.
Third offense within 12 months: $500 to $750 forfeiture.
Fourth or more within 12 months: $750 to $1,000 forfeiture.

For violations involving licensed premises, a fake ID, or procuring alcohol through another:¹

First offense: $250 to $500 forfeiture, license suspension, possible community service.
Second offense within 12 months: $300 to $500 forfeiture.
Third offense within 12 months: $500 to $750 forfeiture.
Fourth or more within 12 months: $750 to $1,000 forfeiture.

Even a first underage offense can affect driving privileges, which catches many people off guard.

When Alcohol Can Be Sold

Sales hours depend on the license type and whether alcohol is consumed on-site or taken home. Local governments can tighten the state hours, but they cannot extend them.

Retail Sales to Take Home

Stores holding a “Class A” license for liquor and wine cannot sell those products between 9 p.m. and 6 a.m.⁴ Beer gets a longer window: stores with a Class “A” beer license must stop selling between midnight and 6 a.m.⁵

Bars and Restaurants

Class “B” licensees must close between 2 a.m. and 6 a.m. on weeknights, with closing pushed to 2:30 a.m. on Saturday and Sunday mornings.⁵ The same hours apply to liquor service under Class “B” licenses.⁶ On January 1, Class “B” licensees are not required to close at all, so New Year’s Eve has no mandated last call.

One rule trips people up during open hours: bars cannot sell packaged carry-out beer, wine, or liquor between midnight and 6 a.m. A bartender can pour you a drink at 1 a.m., but cannot sell you a six-pack to take home at the same hour.

OWI: BAC Limits and Penalties

Wisconsin calls drunk driving “operating while intoxicated,” or OWI. The prohibited blood alcohol concentration depends on who is driving:⁷

Drivers 21 and older: 0.08.
Drivers under 21: any detectable alcohol above 0.0 (the “Not a Drop” rule).
Commercial drivers: 0.04, with no detectable alcohol permitted while on duty.
Drivers under an ignition interlock order: 0.02.⁸

A BAC at or above the applicable limit is enough on its own. The officer does not need to prove swerving or other signs of impairment.

First Offense

Wisconsin is the only state that treats a first-offense OWI with no aggravating factors as a civil forfeiture rather than a crime. The forfeiture runs $150 to $300 plus a $435 OWI surcharge, with no jail time and a license revocation of six to nine months.⁸ An occupational license is available immediately. If a passenger under 16 was in the vehicle, the first offense becomes a criminal charge.⁹ A first offense with a BAC of 0.15 or higher triggers a mandatory ignition interlock device.

Repeat Offenses

Whether a second OWI counts as a repeat depends on whether the prior occurred within 10 years.¹⁰ Within that window:

Second offense: $350 to $1,100 fine plus the OWI surcharge, 5 days to 6 months in jail, 12- to 18-month license revocation, and an ignition interlock device for one year to 18 months.
Third offense: $600 to $2,000 fine, 45 days to one year in jail, with longer revocation and interlock periods.
Fourth offense: Class H felony, minimum $600 fine, at least 60 days of imprisonment.
Fifth or sixth offense: Class G felony with a mandatory minimum of 18 months of confinement as part of a bifurcated sentence.

The jump from civil forfeiture to possible felony is one of the sharpest escalations in Wisconsin law.

Implied Consent and Refusing a Chemical Test

Driving on Wisconsin roads counts as consent to breath, blood, or urine testing when an officer lawfully requests it.¹¹ Refusing carries its own penalty track, separate from any OWI charge.

A first refusal brings a one-year license revocation, with eligibility for an occupational license after 30 days. A second refusal within the lookback period brings a two-year revocation and no occupational license until 90 days have passed.¹¹ A refusal also triggers a mandatory ignition interlock device.¹² You can still face OWI charges based on officer observations and other evidence even if no chemical test is taken. The decision window is immediate, and you do not have the right to consult an attorney before deciding.

Courts must order an ignition interlock device for anyone who refuses a test, for first-time offenders with a BAC of 0.15 or higher, and for any driver with a prior OWI-related conviction or revocation.¹² The driver pays for installation and monthly monitoring.

Open Containers in Vehicles

No one may drink alcohol in a motor vehicle on a Wisconsin highway, and no occupant of a privately owned vehicle may possess an open bottle or container (meaning the seal is broken or contents partially removed).¹³ Open containers belong in the trunk. In vehicles without a trunk, the container must go behind the last upright seat or in another area not normally occupied by passengers. The glove compartment does not qualify.

Passengers riding in a limousine operated by a licensed chauffeur are exempt.¹³ A violation is a civil forfeiture of up to $100. Local ordinances also govern open alcohol in public spaces like parks and sidewalks, so rules vary from one municipality to the next.

Serving Alcohol and Civil Liability

Wisconsin gives broad civil immunity to anyone who sells or gives alcohol. If you host a party and an adult guest drinks too much and causes an accident, you generally cannot be held liable.¹⁴

Two exceptions matter. You lose immunity if you force someone to consume alcohol or lie about a drink containing alcohol. More commonly, immunity does not apply when you provide alcohol to someone you knew or should have known was underage, and that alcohol was a substantial factor in causing injury to a third party.¹⁴ That standard applies equally to social hosts and licensed establishments. A provider regains immunity only when the underage person presented convincing fake identification and the provider relied on it in good faith. Serving adults carries little civil risk in Wisconsin. Serving minors is where exposure lies, and the question is what you reasonably should have known about the person’s age, not whether you actually asked.

1
Wisconsin State Legislature. Wisconsin Code 125.07 – Underage and Intoxicated Persons; Presence on Licensed Premises; Possession; Penalties
2
Wisconsin State Legislature. Wisconsin Statutes 125.07(4)(b) – Annotation
3
Wisconsin State Legislature. Wisconsin Statutes 125.07 – Underage and Intoxicated Persons
4
Wisconsin Department of Revenue. DOR Alcohol Beverage Laws for Retailers – Licensee Responsibilities
5
Wisconsin State Legislature. Wisconsin Statutes 125.32(3) – Closing Hours
6
Wisconsin State Legislature. Wisconsin Statutes 125.68(4) – Closing Hours
7
Wisconsin State Legislature. Wisconsin Statutes 346.63 – Operating Under Influence of Intoxicant or Other Drug
8
Wisconsin Department of Transportation. OWI and Related Alcohol and Drug Offense Penalties
9
Wisconsin State Legislature. An Overview of Wisconsin OWI Law
10
Wisconsin State Legislature. Wisconsin Statutes 346.65 – Penalty for Violating Sections 346.62 to 346.64
11
Wisconsin State Legislature. Wisconsin Statutes 343.305 – Chemical Tests for Intoxication
12
Wisconsin State Legislature. Wisconsin Statutes 343.301 – Installation of Ignition Interlock Device
13
Wisconsin State Legislature. Wisconsin Statutes 346.935 – Intoxicants in Motor Vehicles
14
Wisconsin State Legislature. Wisconsin Statutes 125.035 – Civil Liability Exemption; Furnishing Alcohol Beverages