Under federal law, treason is punished by death or by a minimum of five years in federal prison, a fine of at least $10,000, and a permanent ban from holding any office under the United States. Those penalties are set out in 18 U.S.C. § 2381, and they make treason one of the most harshly punished crimes in the federal code. It is also the only crime the Constitution itself defines, which is a good indication of how seriously the founders took it.
The Statutory Penalties
The punishment for treason is codified in 18 U.S.C. § 2381. Anyone who owes allegiance to the United States and either wages war against the country or gives aid and comfort to its enemies faces the following consequences on conviction:1Office of the Law Revision Counsel. 18 USC 2381 Treason
- Death, or imprisonment for not less than five years. The statute authorizes capital punishment and sets a five-year floor but no ceiling short of life.
- A fine of at least $10,000. Because the statute says “fined under this title,” the general federal fine provision in 18 U.S.C. § 3571 sets the ceiling at $250,000 for a felony.2Office of the Law Revision Counsel. 18 US Code 3571 – Sentence of Fine
- Permanent disqualification from holding any office under the United States. A person convicted of treason can never again serve in any federal position.
The five-year minimum is deceptive in its modesty. In practice, the sentencing guidelines push the punishment far higher. Under U.S. Sentencing Guidelines § 2M1.1, treason carries a base offense level of 43 when the conduct amounts to waging war against the United States.3United States Sentencing Commission. 2M1.1 Treason Level 43 is the highest in the guidelines system and corresponds to life imprisonment. For treason that falls short of waging war, the guidelines direct the court to use the offense level for the most comparable crime.
When the Death Penalty Applies
Treason is explicitly listed as a death-eligible offense under 18 U.S.C. § 3591.4Office of the Law Revision Counsel. 18 US Code 3591 – Sentence of Death When prosecutors seek death, the case proceeds under the Federal Death Penalty Act, and the jury (or the judge, if there is no jury) must weigh specific aggravating factors before imposing a death sentence. For treason, the statutory aggravators are:5Office of the Law Revision Counsel. 18 US Code 3592 – Mitigating and Aggravating Factors to Be Considered in Determining Whether a Sentence of Death Is Justified
- A prior conviction for an espionage or treason offense that carried a possible sentence of life or death.
- Knowingly creating a grave risk to the national security of the United States.
- Knowingly creating a grave risk of death to another person.
Prosecutors may also present other aggravating factors, as long as they give notice, and the defendant is free to present any mitigating evidence. A death sentence requires a unanimous jury finding that the aggravating factors outweigh the mitigating ones.
Supervised Release After Prison
If the sentence is imprisonment rather than death, the court will typically impose a term of supervised release to follow the prison term. Treason is a Class A felony, which carries a supervised release term of up to five years under 18 U.S.C. § 3583.6Office of the Law Revision Counsel. 18 US Code 3583 – Inclusion of a Term of Supervised Release After Imprisonment During that period, the person lives in the community under court-imposed conditions and the supervision of a federal probation officer.
What the Constitution Forbids in Punishing Treason
The same section of the Constitution that defines treason also limits how far Congress can go in punishing it. Article III, Section 3, Clause 2 states that no punishment for treason may “work Corruption of Blood, or Forfeiture except during the Life of the Person attainted.”7Congress.gov. Article III Section 3 Clause 2
“Corruption of blood” was an old English practice under which a convicted traitor’s children and heirs were legally barred from inheriting property through the traitor’s bloodline. The framers viewed this as punishing innocent people for someone else’s crime and banned it outright. The forfeiture limit works similarly: the government can seize a convicted traitor’s property during that person’s lifetime, but once the traitor dies, the property passes to heirs as it normally would. The punishment stops with the person who committed the crime.
The Constitution also sets a high bar for conviction itself. Prosecutors must produce either two witnesses to the same overt act or a confession made in open court.8Cornell Law School. US Constitution Annotated Article III, Section 3, Clause 1 – Treason Clause Doctrine and Practice No other federal crime carries an evidentiary rule written into the Constitution itself.
Loss of U.S. Citizenship
A treason conviction can also cost the defendant U.S. citizenship. Under 8 U.S.C. § 1481, committing an act of treason is one of several acts that can result in loss of nationality, provided the person is convicted by a court and performed the act voluntarily with the intention of giving up citizenship.9GovInfo. Acquisition and Loss of US Citizenship That intent requirement matters. The government cannot strip citizenship from a convicted traitor automatically; it must show the person intended to renounce allegiance to the United States by committing the act. Denaturalization after a treason conviction is possible but not guaranteed.
The Separate Crime of Misprision of Treason
Federal law also punishes people who know that treason has been committed and stay quiet. Under 18 U.S.C. § 2382, anyone who owes allegiance to the United States and learns of a treasonous act must report it as soon as possible to the President, a federal judge, a state governor, or a state judge.10Office of the Law Revision Counsel. 18 USC 2382 Misprision of Treason Concealing the treason is itself a separate federal crime.
The penalty for misprision of treason is a fine, up to seven years in federal prison, or both.10Office of the Law Revision Counsel. 18 USC 2382 Misprision of Treason It is far lighter than the punishment for treason itself, but seven years in federal prison is still a serious sentence. The crime requires actual knowledge and active concealment, not a mere failure to investigate suspicious behavior.
How Often These Penalties Are Actually Imposed
Fewer than 50 people have ever been charged with treason in the entire history of the United States, and only a handful have been convicted. The last notable conviction was Iva Toguri D’Aquino, known as “Tokyo Rose,” who was found guilty in 1949 of aiding Japan during World War II through propaganda broadcasts. She served just over six years of a ten-year sentence and was later pardoned by President Ford in 1977.
The strict constitutional requirements explain the rarity. Prosecutors must show either the levying of war or aid to a declared enemy, and they must produce two witnesses to the same overt act or a confession in open court.8Cornell Law School. US Constitution Annotated Article III, Section 3, Clause 1 – Treason Clause Doctrine and Practice Meeting that bar is genuinely difficult, and federal prosecutors almost always reach for other national security statutes that are easier to prove and carry severe penalties of their own. So while the punishments on the books for treason are among the harshest anywhere in federal law, they are also among the least frequently imposed.