Wisconsin Assault Statute: Battery, Enhancers, and Defenses

Wisconsin assault charges and penalties don’t appear under an “assault” heading in the state statutes, because Wisconsin has no standalone assault offense. Prosecutors instead file battery under Wis. Stat. 940.19, strangulation and suffocation under 940.235, recklessly endangering safety under 941.30, or disorderly conduct under 947.01, with penalties running from 90 days in jail for the lowest misdemeanor to 15 years in prison for intentionally causing great bodily harm. Which charge you face depends on the injury, your intent, and whether enhancers like a weapon or prior conviction apply.

Battery: The Core Charge

Battery is what most people mean when they say assault, and Wisconsin’s statute builds a ladder from misdemeanor to serious felony. Where you land on that ladder depends on two things: how badly the other person was hurt, and what you intended when you acted.

Simple battery under 940.19(1) covers intentionally causing bodily harm without consent. It’s a Class A misdemeanor with up to nine months in jail and a $10,000 fine.¹²

Substantial battery under 940.19(2) applies when the victim suffers substantial bodily harm. The defendant only needs to have intended ordinary bodily harm; the elevated charge comes from the severity of the result. It’s a Class I felony carrying up to three and a half years in prison and a $10,000 fine.¹²

Aggravated battery splits into three tiers:

Under 940.19(4), causing great bodily harm while intending only ordinary bodily harm is a Class H felony, with up to six years in prison and a $10,000 fine.
Under 940.19(5), causing great bodily harm while intending that level of injury is a Class E felony, with up to 15 years in prison and a $50,000 fine.
Under 940.19(6), causing bodily harm through conduct that creates a substantial risk of great bodily harm is a Class H felony. A rebuttable presumption of substantial risk arises if the victim has a visible physical disability or one the defendant knew about.

The gap between (4) and (5) is entirely about state of mind. Both require great bodily harm to the victim, but once prosecutors can prove the defendant intended that level of injury, the maximum sentence nearly triples.¹²

When Battery Doesn’t Fit: Other Charges

Not every violent or threatening act is prosecuted as battery. Three other statutes cover the territory on either side of it.

Strangulation and Suffocation

Under 940.235, intentionally blocking someone’s ability to breathe — by pressing on the throat or neck, or covering the nose or mouth — is a Class H felony with up to six years in prison and a $10,000 fine.³² A prior conviction under the same statute, or a prior violent crime conviction, lifts it to a Class G felony with a maximum of ten years and a $25,000 fine. There is no misdemeanor version. The charge appears frequently in domestic violence cases.

Recklessly Endangering Safety

Section 941.30 covers reckless conduct that puts another person in danger, even when nobody is actually hurt. First-degree reckless endangerment requires circumstances showing utter disregard for human life and is a Class F felony with up to twelve and a half years in prison and a $25,000 fine. Second-degree is a Class G felony with up to ten years and a $25,000 fine.⁴² Prosecutors often add second-degree reckless endangerment alongside battery, or use it as the primary charge when behavior was dangerous but caused no injury.

Disorderly Conduct

Disorderly conduct under 947.01 is the broadest and lowest-level charge. It covers violent, abusive, or otherwise disorderly behavior that tends to provoke a disturbance, whether in a public or private place. It’s a Class B misdemeanor with up to 90 days in jail and a $1,000 fine.⁵² It often shows up in plea negotiations as a reduced charge when the evidence for battery is thin but the defendant’s behavior was clearly out of line.

Enhancers That Raise the Ceiling

Wisconsin lets prosecutors stack enhancers on top of the base charge, and the stacked time can dwarf the underlying maximum.

The dangerous weapon enhancer under 939.63 adds time for any crime committed while possessing, using, or threatening to use a dangerous weapon. For misdemeanors the increase is up to six additional months; for felonies it ranges from three to five additional years depending on the underlying maximum.⁶ It doesn’t apply when the weapon is already an element of the crime charged.

The habitual criminality statute, 939.62, increases the maximum sentence for defendants with prior convictions. You qualify as a “repeater” if you were convicted of a felony within the five years before the current offense, or of three separate misdemeanors in that same window. The added time runs up to two years for misdemeanors and up to four or six years for felonies, depending on whether the prior was a misdemeanor or felony.⁷ A “persistent repeater” faces mandatory life without parole.

The domestic abuse repeater enhancer under 939.621 adds up to two years of imprisonment on any crime that constitutes domestic abuse. It reaches anyone arrested for a domestic abuse incident who reoffends within 72 hours, or anyone with two or more prior domestic abuse convictions in the preceding ten years. The effect is significant: it converts a misdemeanor to a felony, so a simple battery that would cap at nine months in jail becomes a felony with real prison exposure.

Self-Defense

Self-defense is a legal privilege under 939.48 and the most common defense in battery cases. You can use force to prevent or stop what you reasonably believe is an unlawful attack, but only as much force as you reasonably believe is necessary. Force likely to cause death or great bodily harm is justified only when you reasonably believe it necessary to prevent your own imminent death or great bodily harm.⁸

Wisconsin also has a castle doctrine. If someone is unlawfully and forcibly entering your home, vehicle, or place of business while you are inside, the court must presume you reasonably believed deadly force was necessary. That presumption shifts a heavier burden to the prosecution to disprove self-defense. The doctrine does not apply if you were engaged in criminal activity at the time, or if the person entering was an identified law enforcement officer acting in an official capacity.⁸ When it applies, the court cannot consider whether you had the opportunity to flee. Outside those specific locations, Wisconsin has no blanket “stand your ground” rule, and whether you could have retreated can factor into whether your response was reasonable.

Consequences Beyond the Sentence

A conviction can carry federal consequences the state court cannot waive. Under 18 U.S.C. 922(g)(9), anyone convicted of a misdemeanor crime of domestic violence is permanently prohibited from possessing firearms or ammunition.⁹ That reaches even a Class A misdemeanor battery if the offense involved a domestic relationship. For gun owners, law enforcement officers, military members, and security workers, the ban can end a career. Wisconsin’s domestic abuse injunctions and other protective orders can separately require firearms surrender.¹⁰

Non-citizens face another layer. Under federal immigration law, a “crime of violence” carrying a sentence of at least one year qualifies as an aggravated felony, which makes a person deportable and generally bars future admission.¹¹ Every felony battery charge under 940.19 meets the one-year threshold. Even a negotiated plea to a lower charge can trigger removal if the sentence is one year or more, so a non-citizen facing any assault-related charge in Wisconsin should consult an immigration attorney alongside criminal defense counsel. The immigration consequence can be worse than the criminal sentence itself.

1
Wisconsin State Legislature. Wisconsin Statutes 940.19 – Battery; Substantial Battery; Aggravated Battery
2
Wisconsin State Legislature. Wisconsin Statutes 939.50 – Classification of Felonies
3
Wisconsin State Legislature. Wisconsin Statutes 940.235 – Strangulation and Suffocation
4
Wisconsin State Legislature. Wisconsin Statutes 941.30 – Recklessly Endangering Safety
5
Wisconsin State Legislature. Wisconsin Statutes 947.01 – Disorderly Conduct
6
Wisconsin State Legislature. Wisconsin Statutes 939.63 – Penalties; Use of a Dangerous Weapon
7
Wisconsin State Legislature. Wisconsin Statutes 939.62 – Increased Penalty for Habitual Criminality
8
Wisconsin State Legislature. Wisconsin Statutes 939.48 – Self-Defense and Defense of Others
9
Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts
10
Wisconsin State Legislature. Wisconsin Statutes 813.12 – Domestic Abuse Restraining Orders and Injunctions
11
Legal Information Institute. 8 USC 1101(a)(43) – Aggravated Felony