Is a 3rd OWI in Wisconsin a Felony or Misdemeanor?

A third OWI in Wisconsin is a misdemeanor by default, not a felony. The standard penalty is $600 to $2,000 in fines and 45 days to one year in county jail, which places it at the misdemeanor level.¹ Two specific circumstances change that answer: a child under 16 in the vehicle, or an incident that injured or killed someone. Either one turns the third offense into a felony with far steeper consequences.

Why the Standard Third Offense Is a Misdemeanor

Wisconsin’s OWI statute does not use the word “misdemeanor” when it lays out the third-offense penalties, but the structure speaks for itself. The sentence is served in county jail rather than state prison, the maximum is capped at one year, and the statute does not assign a felony class letter.¹ Those are the markers of a misdemeanor in Wisconsin.

The contrast with a fourth OWI makes the dividing line obvious. A fourth offense is explicitly a Class H felony with 60 days to six years of imprisonment.¹ The jump from county jail to state prison is where the law shifts from misdemeanor to felony territory, and under normal circumstances a third OWI sits on the misdemeanor side of that line.

When a Third OWI Becomes a Felony

A Child Under 16 Was in the Vehicle

If a passenger under 16 was in the car at the time of the offense, the statute doubles both the minimum and maximum fines and jail time that would otherwise apply, and the charge becomes a felony.¹ For a third offense, the doubled numbers come out to:

Fines of $1,200 to $4,000
Imprisonment of 90 days to two years

Because the reclassification makes it a felony, the place of imprisonment shifts from county jail to a state correctional facility. This is one of the most common ways a third OWI becomes a felony, and it surprises people who assumed the base third offense was already a felony to begin with.

Someone Was Injured or Killed

Causing great bodily harm while driving intoxicated is charged separately as injury by intoxicated use of a vehicle, a Class F felony that carries up to 12 years and 6 months in prison.² A death turns the case into homicide by intoxicated use of a vehicle. With any prior OWI-related conviction on your record, that charge is a Class C felony carrying up to 40 years; without priors it is a Class D felony with a mandatory five-year minimum.³ These charges apply regardless of whether the current offense is technically a third or any other number.

What the Misdemeanor-Level Third OWI Actually Costs

Even without a felony label, the standard third-offense sentence reshapes daily life for years.

Fines

Base fines run $600 to $2,000, plus a mandatory $535 driver improvement surcharge and additional court costs.⁴ A high BAC pushes the base fine range up sharply:

BAC of 0.17 to 0.199: fines doubled ($1,200 to $4,000)
BAC of 0.20 to 0.249: fines tripled ($1,800 to $6,000)
BAC of 0.25 or above: fines quadrupled ($2,400 to $8,000)

The multipliers apply to the base fine only. The $535 surcharge and court costs are the same regardless of BAC.¹

Jail Time

The mandatory minimum is 45 days in county jail, with a maximum of one year.¹ At least 48 consecutive hours have to be served in actual confinement, so alternatives like work-release or electronic monitoring cannot substitute for those first two days.⁵

License Revocation

A third conviction triggers a two- to three-year license revocation, plus additional time equal to the length of any jail sentence imposed.⁶ Someone sentenced to the maximum year in jail could lose their license for up to four years.

Ignition Interlock Device

Judges must order an ignition interlock on every vehicle owned or registered by a repeat OWI offender.⁷ The device must stay installed for at least one year and potentially for the full revocation period. Installation, monthly monitoring, and removal costs fall on you.

Alcohol and Drug Assessment

You have 72 hours after conviction to contact an approved assessment facility in your county.⁸ The assessment feeds into a driver safety plan that can range from classes to inpatient treatment lasting up to 30 days.⁹ Completing it is required before your license can be reinstated.

The 0.02 Threshold Changes Everything Going Forward

Once you have three OWI-related convictions, your legal blood alcohol limit drops permanently from 0.08 to 0.02.¹⁰ For most people, 0.02 is roughly the effect of a single drink. The threshold is not a separate penalty; it is a redefinition of your personal legal limit for life, and it applies even if your prior convictions came from other states.

If you blow a 0.03 after your third conviction, you are now violating the prohibited alcohol concentration law. That new violation counts as a fourth offense, which is a Class H felony carrying 60 days to six years in state prison.¹ The misdemeanor status of the third offense is, in practical terms, a one-time ceiling.

How Wisconsin Decides This Is Your Third

Wisconsin counts priors by violation date rather than conviction date.¹ The relevant date is when you were pulled over, not when you were sentenced.

For a second OWI, there is a 10-year lookback: if your first offense was more than a decade before the second, the second is treated as a first. For a third offense and anything after it, the lookback is your entire lifetime driving record. Two convictions from 25 years ago still make your next arrest a third offense.¹

Out-of-state OWI convictions count. So do administrative license suspensions or revocations related to impaired driving, and convictions for homicide or injury by intoxicated use. Multiple suspensions or convictions from the same incident count as one.

A Note on Firearms

The standard misdemeanor third OWI tops out at exactly one year, which keeps it just below the federal threshold that bans firearm possession for crimes punishable by more than a year.¹¹ But if the third OWI gets elevated to a felony because a child was in the car or someone was seriously injured, the maximum sentence rises well past a year and the federal firearm prohibition takes effect.

1
Wisconsin State Legislature. Wisconsin Code 346.65 – Penalty for Operating Under Influence of Intoxicant or Other Drug
2
Wisconsin State Legislature. Wisconsin Code 940.25 – Injury by Intoxicated Use of a Vehicle
3
Wisconsin State Legislature. Wisconsin Code 940.09 – Homicide by Intoxicated Use of Vehicle or Firearm
4
Wisconsin State Legislature. Wisconsin Code 346.655 – Driver Improvement Surcharge
5
Wisconsin Court System. Seventh Judicial Administrative District – OWI Sentencing Guidelines
6
Wisconsin Department of Transportation. OWI and Related Alcohol and Drug Offense Penalties
7
Wisconsin Department of Transportation. Ignition Interlock Device
8
Wisconsin Department of Transportation. OWI Assessment and Driver Safety Plan
9
Wisconsin Department of Health Services. Intoxicated Driver Program
10
Wisconsin State Legislature. Wisconsin Code 340.01(46m) – Prohibited Alcohol Concentration Definition
11
Office of the Law Revision Counsel. 18 U.S. Code 922 – Unlawful Acts