There is no fixed minimum sentence for stabbing someone under U.S. law. The charge, the severity of the injury, the defendant’s criminal history, and the jurisdiction all move the number. Under federal law, assault with a dangerous weapon like a knife is punishable by up to 10 years in prison, and attempted murder carries up to 20 years.1Office of the Law Revision Counsel. 18 US Code 113 – Assaults Within Maritime and Territorial Jurisdiction State penalties vary but usually track a similar range for aggravated assault. What actually lands on a defendant depends on how the prosecutor charges the case, what the guidelines say, whether any enhancements or mandatory minimums apply, and whether the case ends in a plea.
The Charge Sets the Range
Prosecutors have a spectrum of charges available for a stabbing, and the one they pick largely determines the sentencing floor and ceiling. Where a case lands on that spectrum comes down to what can be proven about the defendant’s state of mind and how badly the victim was hurt.
A stabbing that causes injury will almost always be charged as a felony, meaning a crime punishable by more than a year in state prison. Most stabbings are charged as aggravated assault, which generally means an attack with a deadly weapon or one causing serious bodily injury. A knife qualifies as a deadly weapon in virtually every jurisdiction. If the evidence shows the attacker intended to kill, the charge can be upgraded to attempted murder. If the victim dies, it becomes murder or manslaughter, which can carry life imprisonment.
Federal Penalties for a Stabbing
Federal assault charges under 18 U.S.C. § 113 apply within federal jurisdiction, including military bases, federal buildings, national parks, and Indian Country. The federal numbers are also a useful benchmark because many states structure their own sentencing in a comparable range.
- Assault with a dangerous weapon with intent to cause bodily harm: up to 10 years.1Office of the Law Revision Counsel. 18 US Code 113 – Assaults Within Maritime and Territorial Jurisdiction
- Assault resulting in serious bodily injury: up to 10 years.1Office of the Law Revision Counsel. 18 US Code 113 – Assaults Within Maritime and Territorial Jurisdiction
- Attempted murder: up to 20 years.2Office of the Law Revision Counsel. 18 US Code 1113 – Attempt to Commit Murder or Manslaughter
- Attempted manslaughter: up to 7 years.2Office of the Law Revision Counsel. 18 US Code 1113 – Attempt to Commit Murder or Manslaughter
These are statutory maximums, not guaranteed sentences. A first-time offender who caused minor injury will land far below these ceilings; someone with prior violent convictions who nearly killed the victim will land near them.
How Federal Guidelines Translate a Charge Into Months
Federal judges follow advisory sentencing guidelines from the United States Sentencing Commission. The Supreme Court held in United States v. Booker (2005) that these guidelines are not mandatory, but judges must still consider them.3Legal Information Institute. Federal Sentencing Guidelines Most federal sentences fall within or near the guideline range.
For aggravated assault, the guidelines start with a base offense level of 15. That level then climbs based on specific facts of the crime:4United States Sentencing Commission. USSG 2A2.2 Aggravated Assault
- Dangerous weapon used: +4 levels
- Bodily injury to the victim: +2 levels
- Serious bodily injury: +4 levels
- Permanent or life-threatening injury: +6 levels
A stabbing that causes serious injury will typically reach an offense level around 19 to 23 before criminal history is factored in. The guidelines then cross-reference the offense level against a criminal history category. A first-time offender (Category I) at offense level 19 faces a range of roughly 30 to 37 months. Someone at Category VI at the same offense level faces 63 to 78 months.
Why Criminal History Moves the Number So Much
Criminal history is scored on a point system. Prior sentences of imprisonment over one year add 3 points each, shorter sentences add fewer, and committing the offense while on probation or parole adds 2 more. The total drops the defendant into one of six categories, from I (0 or 1 point) to VI (13 or more).5United States Sentencing Commission. Proposed January 2026 Amendments to the Federal Sentencing Guidelines
At offense level 15, a Category I defendant faces 18 to 24 months. A Category VI defendant at the same offense level faces 33 to 41 months, nearly double the low end.5United States Sentencing Commission. Proposed January 2026 Amendments to the Federal Sentencing Guidelines That gap widens once weapon and injury enhancements are added.
Judges can depart from the guideline range when the facts warrant. Extreme provocation can pull a sentence down; a calculated or sadistic attack can push it up. Straying far from the guidelines without a strong reason invites reversal on appeal.
Enhancements That Push the Sentence Up
Certain aggravating facts can turn a few years in prison into a decade or more.
Vulnerable Victims
If the victim was unusually vulnerable due to age, physical condition, or mental condition, and the defendant knew or should have known, federal guidelines add 2 offense levels. Cases involving a large number of vulnerable victims add another 2.6United States Sentencing Commission. USSG 3A1.1 Hate Crime Motivation or Vulnerable Victim Stabbing a child, an elderly person, or someone with a disability will almost certainly trigger the enhancement.
Hate Crime Motivation
When a stabbing is motivated by the victim’s race, religion, national origin, gender, sexual orientation, gender identity, or disability, federal prosecutors can charge under 18 U.S.C. § 249. The base penalty is up to 10 years. If the victim dies or the attack amounts to an attempt to kill, the penalty rises to any term of years up to life.7Office of the Law Revision Counsel. 18 US Code 249 – Hate Crime Acts A stabbing that might otherwise carry a five-year sentence can end in life imprisonment when hate crime charges attach.
Prohibited Weapons
Using a knife that is federally prohibited adds another layer of exposure. Federal law classifies switchblades, including gravity knives, as restricted items.8Office of the Law Revision Counsel. 15 USC 1241 – Definitions Many states maintain their own lists. Using a banned blade during an assault can produce separate weapons charges stacked on the assault.
Mandatory Minimums and Repeat Offenders
Some cases trip mandatory minimums that strip a judge’s discretion. The most significant federal one for people with violent histories comes from the Armed Career Criminal Act. Someone with three or more prior violent felony convictions who is caught illegally possessing a firearm faces a 15-year mandatory minimum.9Legal Information Institute. Armed Career Criminal Act (1984) The ACCA targets firearms rather than knives, but a stabbing defendant who also had a gun stacks that floor on top of the assault sentence.
State mandatory minimums for aggravated assault with a deadly weapon vary. Some states impose several-year mandatory floors for any felony committed with a deadly weapon. Others have three-strikes laws that mandate lengthy terms — sometimes 25 years to life — for defendants with multiple prior serious or violent felony convictions. Two people convicted of essentially the same stabbing can receive very different sentences depending on the state and their records.
Why Real Sentences Look Different From the Statute
More than 97% of federal criminal cases are resolved by plea bargain rather than trial, and state numbers are comparable. The sentence most people actually receive for a stabbing is negotiated, not imposed after a verdict.
In a typical deal, the defendant pleads guilty to a lesser charge in exchange for the prosecutor dropping more serious ones or recommending a lighter sentence. Someone charged with attempted murder might plead down to aggravated assault. Someone charged with aggravated assault might plead to a lesser assault charge. That is why the published maximums can be misleading. A statute may authorize 20 years, but if most defendants plead to a reduced charge and serve 3 to 7 years, the real-world picture looks quite different from the statutory one.
Self-Defense and Mitigation
Not every stabbing produces a conviction. Self-defense is the most common legal justification, and when it works, it is a complete defense: no criminal liability at all, not just a lower sentence.
To claim self-defense, the defendant generally must show they reasonably believed they faced an imminent threat of serious bodily harm or death, and that the force used was proportional. A knife is deadly force, so self-defense with a knife is only justified against a deadly or seriously harmful threat. Pulling a knife on someone who shoved you in a parking lot does not qualify.
Whether you have to retreat first depends on the state. At least 31 states have some form of stand-your-ground law, removing any duty to retreat when you are somewhere you have a right to be. The rest generally require retreat when it can be done safely, though nearly every state waives that requirement inside your own home under the castle doctrine.
Even short of full acquittal, self-defense evidence can drop the sentence significantly. A judge who believes the defendant was responding to a real threat but overreacted will typically impose less time than for an unprovoked attack. Other mitigating factors include duress, mental health conditions, no prior record, and genuine remorse. Federal guidelines specifically allow downward departures when the conduct was significantly less serious than the typical offense of that type.
What Comes After the Sentence
Prison time is only part of what a stabbing conviction produces. In 1994, Congress passed the Violent Crime Control and Law Enforcement Act, which created federal incentive grants for states that required violent offenders to serve at least 85% of their imposed sentence before parole eligibility.10National Institute of Justice. Truth in Sentencing and State Sentencing Practices Most states adopted some version. Someone sentenced to 10 years in one of those states will serve at least 8.5 before a parole board can consider release.
In the federal system, parole was abolished in 1987 and replaced with supervised release. After a prison term for a Class A or Class B felony, which includes most serious assault convictions, a defendant faces up to five years of supervised release.11Office of the Law Revision Counsel. 18 USC 3583 – Inclusion of a Term of Supervised Release After Imprisonment Violating its conditions sends the person back to prison.
Federal law also requires courts to order restitution to the victim whenever a crime of violence causes physical injury. It is not discretionary.12Office of the Law Revision Counsel. 18 US Code 3663A – Mandatory Restitution to Victims of Certain Crimes Restitution covers medical expenses, rehabilitation, lost income, and costs the victim incurred participating in the prosecution. For a serious stabbing it can reach tens or hundreds of thousands of dollars, and the obligation survives bankruptcy in most cases.
A felony conviction for a violent crime carries a lifetime federal firearm ban. Anyone convicted of a crime punishable by more than one year in prison is prohibited from possessing firearms or ammunition, and violating that ban is itself a federal felony carrying up to 15 years.13Office of the Law Revision Counsel. 18 US Code 922 – Unlawful Acts Professional licensing, housing, and voting rights are also affected, with the specifics varying by state.