Idaho Code 18-918: Domestic Battery Penalties and Defenses

Idaho Code 18-918 is the state’s domestic violence statute. It makes it a crime to assault or batter a household member, and it sorts those offenses into tiers: a first offense without physical injury is a misdemeanor carrying up to a year in jail, while any battery that causes a wound or injury is an automatic felony punishable by up to ten years in prison.¹ A conviction also triggers a mandatory evaluation, can cost you your firearm rights under both state and federal law, and weighs against you in any custody case.

Who Counts as a Household Member

The statute applies only when the alleged victim is a “household member.” That term covers four categories of people: current spouses, former spouses, people who share a child regardless of whether they ever married or lived together, and people who are cohabiting.¹ Violence outside those relationships is prosecuted under Idaho’s general assault and battery statutes, not 18-918. The broader definition of household member used for civil protection orders sweeps in more relationships, but it does not expand who can be charged under 18-918.

Assault, Battery, and the Traumatic Injury Line

Section 18-918 splits domestic violence into two offenses. Domestic assault is an unlawful attempt or threat to do bodily harm to a household member, coupled with the apparent ability to carry it out. Domestic battery is actual unwanted physical contact.¹

The critical line for penalties is whether a battery caused a “traumatic injury.” The statute defines that phrase broadly to mean any wound or external or internal injury caused by physical force, whether minor or serious. A bruise, a scratch, or a small cut can qualify. Cross that line and the case is a felony no matter how clean the defendant’s record is.

Misdemeanor Penalties and the Repeat-Offense Ladder

When assault or battery occurs without a traumatic injury, the offense starts as a misdemeanor. The penalties climb with each subsequent conviction:¹

First offense: up to one year in county jail and a fine up to $1,000.
Second offense within ten years: still a misdemeanor, but the maximum fine doubles to $2,000, with up to one year in jail.
Third offense within fifteen years: elevated to a felony, punishable by up to five years in state prison and a fine up to $5,000.

The lookback windows matter. A second conviction only triggers the enhanced misdemeanor penalty if it falls within ten years of the first. For the third-offense felony, all three convictions must fall within fifteen years measured from the first. Prior guilty pleas count as convictions for these enhancements even where the judge entered a withheld judgment.

Felony Domestic Battery

Battery that causes a traumatic injury is a felony regardless of prior record. The maximum sentence is ten years in state prison and a fine up to $10,000.¹ This is the top tier of the statute, and it applies independently of the repeat-offense enhancements that govern injury-free misdemeanors.

Penalties Double When a Child Is Present

All maximum penalties under 18-918 double when the offense takes place in the presence of a child. That covers both fines and jail or prison time. “In the presence of a child” means the child was physically there or the defendant knew the child could see or hear what happened.¹

The math is straightforward but harsh. A first-offense misdemeanor battery in front of a child carries up to two years in jail and a $2,000 fine. Felony domestic battery with a child watching stretches to twenty years and $20,000. Defendants routinely miss this multiplier when weighing their exposure.

The Mandatory Domestic Violence Evaluation

Anyone who pleads guilty to or is convicted of an offense under 18-918 must complete a domestic violence evaluation before sentencing, at their own expense. A court-approved provider performs the evaluation and reports on whether counseling or treatment is needed, along with the type of program recommended and its estimated cost.²

The judge considers the evaluation at sentencing and can order treatment as a condition of probation or sentence. Failing to obtain the evaluation when ordered is treated as an aggravating factor and can push the sentence higher. The evaluator and the treatment provider must be different entities unless the court waives that requirement.

Firearm Rights After a Conviction

A conviction under 18-918 can cost you the right to own or possess a firearm under both state and federal law, and the federal restrictions reach even misdemeanor convictions.

Idaho State Law

Under Idaho Code 18-3316, anyone convicted of a felony is prohibited from possessing a firearm, and violating that prohibition is itself a felony carrying up to five years in prison and a $5,000 fine.³ That covers felony domestic battery and any third misdemeanor offense elevated to a felony under the enhancement ladder. Idaho judges also have discretion to impose firearm restrictions as a condition of pretrial release, probation, or a civil protection order.

Federal Law

Federal law reaches further. Under 18 U.S.C. § 922(g)(9), anyone convicted of a misdemeanor crime of domestic violence is prohibited from possessing firearms or ammunition, regardless of how the state classifies the offense.⁴ The ban has no grandfather clause, applies retroactively, and applies to military personnel and law enforcement officers the same as anyone else. A state-court expungement or set-aside does not automatically restore federal firearm rights; that generally requires a federal pardon or court order.

Effect on Child Custody

Idaho custody decisions turn on the best interests of the child, and Idaho Code 32-717 lists domestic violence as a factor the court must weigh, whether or not the violence took place in the child’s presence.⁵ A parent convicted under 18-918 can face restricted custody or supervised visitation, and in severe cases the court can limit parental rights altogether. Judges can also require counseling or anger management as a condition of custody or visitation. Where a civil protection order is in place, the court can award temporary custody to the victim as part of that order.

Common Defenses

Self-defense is the defense raised most often. Idaho law recognizes the right to use reasonable force against imminent harm, but the force must be proportional to the threat. Responding to a verbal argument with serious physical injury will not fit that frame.

Defendants also attack the evidence itself. False or exaggerated allegations do come up, particularly when a divorce or custody dispute is already underway, and defense counsel may probe inconsistencies in the alleged victim’s account, missing physical evidence, or injuries that do not match the described events. Procedural defenses can also apply where evidence was obtained through an unlawful search or officers failed to advise the defendant of their rights.

Setting Aside a Conviction

Idaho Code 19-2604 allows certain defendants who complete probation without violations to ask the court to terminate the sentence, set aside the guilty plea or conviction, and dismiss the case. A successful motion restores civil rights.

Eligibility is narrow. Defendants who served time in state custody for a felony generally do not qualify unless the sentence was commuted. For a misdemeanor, the defendant must have received a suspended sentence or no jail time. And even when a state court sets aside the conviction, the federal firearm prohibition under 18 U.S.C. § 922(g)(9) can still apply unless the relief specifically addresses firearm rights. Anyone considering this path should talk with an attorney who works both sides of that state-federal line before filing.

1
Idaho State Legislature. Idaho Code 18-918 – Domestic Violence
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Idaho State Legislature. Idaho Code 18-918 – Domestic Violence
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Idaho State Legislature. Idaho Code 18-3316 – Unlawful Possession of a Firearm
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Office of the Law Revision Counsel. 18 U.S. Code 922 – Unlawful Acts
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Idaho State Legislature. Idaho Code 32-717 – Custody of Children, Best Interest