Aggravated assault in Idaho is a felony that carries up to five years in state prison and a fine of up to $5,000. Under Idaho Code § 18-905, a simple assault becomes aggravated when one of three things is true: the person uses a deadly weapon or instrument, uses force likely to cause great bodily harm, or uses a corrosive acid, caustic chemical, or similar substance.1Idaho State Legislature. Idaho Code 18-905 – Aggravated Assault Defined No one has to be touched or injured. Assault in Idaho is about the threat or attempt, not the contact, so pointing a loaded gun at someone during an argument can be enough.2Idaho State Legislature. Idaho Code 18-901 – Assault Defined
What Makes an Assault “Aggravated”
The three triggers under § 18-905 each stand on their own. Any one of them turns a misdemeanor assault into a felony.
A Deadly Weapon or Instrument
Subsection (a) covers assaults committed with a deadly weapon or instrument, as long as the person did not intend to kill. The statute’s definition of a deadly weapon reaches further than people expect. A firearm counts even when it is unloaded or so defective it cannot actually fire.1Idaho State Legislature. Idaho Code 18-905 – Aggravated Assault Defined Courts look at how an object was used, not what it was built for. A car driven at a person, a heavy tool swung at someone’s head, or a broken bottle thrust toward a face can all qualify. The weapon never has to make contact.
Force Likely to Produce Great Bodily Harm
Subsection (b) applies when the force itself is severe enough to cause serious injury, even without a weapon. Think stomping toward someone on the ground, or using size and strength in a way that could leave lasting damage. The test is whether the force was likely to produce great bodily harm, not whether it actually did. “Great bodily harm” generally means injuries beyond the minor or moderate range: broken bones, significant disfigurement, loss of function in a limb or organ. The jury weighs the force and the circumstances.
Corrosive or Caustic Chemicals
Subsection (c) covers assaults carried out with a corrosive acid, caustic chemical, or similar substance. Throwing bleach toward someone’s face, or threatening someone with acid while showing the ability and intent to use it, falls here. The substance has to actually be capable of burning or destroying tissue, and as with the other two triggers, it does not need to reach the victim.
The Penalty Range
Idaho Code § 18-906 sets the sentence at up to five years in state prison, a fine of up to $5,000, or both.3Idaho State Legislature. Idaho Code 18-906 – Aggravated Assault Punishment Judges have real discretion inside that range. Some defendants get probation; others serve years, depending on the facts, criminal history, and whether the person has shown violence before.
Courts can also order restitution for the victim’s economic losses. Under Idaho Code § 19-5304, a judge is expected to order restitution whenever the crime causes economic loss, unless the court specifically finds restitution inappropriate and puts the reasons on the record.4Idaho State Legislature. Idaho Code 19-5304 – Restitution for Crime Victims That can include medical bills, counseling, and lost wages.
The penalty doubles when the victim is a law enforcement officer, judge, firefighter, emergency medical worker, correctional officer, prosecutor, public defender, or another protected public servant listed in Idaho Code § 18-915, provided the person was performing their duties and you knew or should have known their status. In that situation the maximum rises to ten years in prison and a $10,000 fine.5Idaho State Legislature. Idaho Code 18-915 – Assault or Battery Upon Certain Personnel
Aggravated Assault Is Not Aggravated Battery
This is the distinction that trips people up, and the one most worth getting straight if you are trying to understand your exposure. Assault is a threat or an attempt. Battery is actual physical contact or harm. They are separate offenses in Idaho with very different sentences.
Simple battery under Idaho Code § 18-903 covers any willful and unlawful use of force, any intentional unwanted touching, or intentionally causing bodily harm.6Idaho State Legislature. Idaho Code 18-903 – Battery Defined A battery becomes aggravated battery under Idaho Code § 18-907 when it causes great bodily harm, permanent disability, or permanent disfigurement; involves a deadly weapon; involves a corrosive chemical or poison; or causes serious harm to an embryo or fetus during a battery against a pregnant woman.7Idaho State Legislature. Idaho Code 18-907 – Aggravated Battery Defined
The sentence gap is substantial. Aggravated assault maxes out at five years. Aggravated battery carries up to fifteen years in state prison.8Idaho State Legislature. Idaho Code 18-908 – Aggravated Battery Punishment Brandish a knife and threaten someone without making contact and you are looking at aggravated assault. If the knife cuts the person, the charge shifts to aggravated battery and triple the maximum prison time. The line between the two can come down to inches.
What a Felony Conviction Does to the Rest of Your Life
A felony aggravated assault conviction follows you well past any sentence. Employment, housing, and professional licensing applications routinely ask about felony convictions, and a violent felony on your record changes job and housing prospects for years.
Firearms are the other major consequence. Federal law bars anyone convicted of a crime punishable by more than one year in prison from possessing firearms or ammunition anywhere in the country.9Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts Violating that ban is a separate federal felony.
Idaho state law is more layered. Under Idaho Code § 18-310, a person convicted of an Idaho felony generally has full citizenship rights restored upon final discharge from the sentence, including prison, probation, and parole. The statute lists specific offenses for which firearm rights are not automatically restored, and for those offenses the person can apply to the Commission of Pardons and Parole five years after final discharge to ask for restoration.10Idaho State Legislature. Idaho Code 18-310 – Civil Rights Restored Upon Final Discharge Even if Idaho restores state firearm rights, the federal prohibition stays in place unless the person obtains a presidential pardon or meets narrow federal criteria.
Defenses That Come Up Regularly
An aggravated assault charge is not an automatic conviction. A handful of defenses show up again and again in Idaho courts.
Self-Defense and Defense of Others
Idaho has a strong stand-your-ground law. Idaho Code § 19-202A says you have no duty to retreat from any place you have a legal right to be, and you can use whatever force a reasonable person in your situation would consider necessary to defend yourself or someone else.11Idaho State Legislature. Idaho Code 19-202A – Defense of Self, Others and Certain Places The statute explicitly says you do not have to pause to figure out whether the danger is real or only apparent. You can act on what a reasonable person would perceive in the moment.
The prosecution carries the burden of proving beyond a reasonable doubt that your use of force was not justified. And if someone unlawfully forces their way into your home, business, or occupied vehicle, you are presumed to have acted reasonably in using force against them. This frequently matters in aggravated assault cases where the defendant grabbed a weapon in response to a perceived threat.
Lack of Apparent Ability
Idaho’s assault definition requires “apparent ability” to carry out the threatened harm. If the defendant was not actually in a position to follow through, the element is missing. Yelling a threat from across a parking lot with no weapon visible may not meet the standard. Without apparent ability, even an ugly threat does not satisfy the statutory definition of assault, much less aggravated assault.
No Intent or Accidental Conduct
A genuinely accidental act is not an assault. Knocking a knife off a counter while gesturing during an argument is not the same as brandishing it. The state has to show the defendant intended to threaten or attempt violence, and where the facts are ambiguous, the defense can push hard on the gap between a careless act and a deliberate threat.
How Long Prosecutors Have to File Charges
Idaho prosecutors have five years from the date of the offense to file felony charges for aggravated assault. Once that window closes, the state cannot bring the case. The same five-year limit applies to most Idaho felonies; only a handful of offenses such as murder and rape have no time limit. If you think charges might be coming for something that happened years ago, that clock is the first thing worth checking.
From Arrest to Court
If you are arrested for aggravated assault, you will typically be booked into the county jail and have bail set. Bail amounts vary with the facts, your record, and the county. At the initial appearance or arraignment, a judge reads the charge and you enter a plea. Because this is a felony, you are entitled to a preliminary hearing, where a magistrate decides whether enough evidence exists to send the case to district court for trial.
Probation or a suspended sentence is possible, especially for first-time offenders or cases on the lower end of severity. Violating probation conditions can lead the judge to impose the original prison sentence. After any period of incarceration, parole brings supervision requirements, and a parole violation can send you back to prison to finish the time.