Title 18 of the United States Code: Crimes and Criminal Procedure

Title 18 of the United States Code is the main body of federal criminal law. Enacted on June 25, 1948, it pulled together criminal statutes that had been scattered across dozens of separate laws into a single organized code, and today it defines most federal crimes and the procedures that govern federal criminal cases from investigation through sentencing and imprisonment.¹

How the Code Is Organized

Title 18 is split into five parts, each with a different job.

Part I — Crimes (Sections 1–2725). The largest part by far. Specific federal offenses organized into roughly 120 chapters by subject, from arson and firearms to fraud, kidnapping, and terrorism.
Part II — Criminal Procedure (Sections 3001–3772). How federal cases are investigated, charged, tried, sentenced, and appealed.
Part III — Prisons and Prisoners (Sections 4001–4353). Federal prison operations, inmate treatment, good-time credit, and prisoner transfers.
Part IV — Correction of Youthful Offenders (Sections 5001–5043). Separate standards for younger defendants and juvenile delinquency proceedings.
Part V — Immunity of Witnesses (Sections 6001–6005). The framework for granting witnesses immunity in exchange for testimony.

Citations follow a standard format. “18 U.S.C. § 111” means Title 18, United States Code, Section 111, which covers assaulting federal officers.² The same format works for any section in the code.

Not every federal crime lives in Title 18. The Controlled Substances Act sits in Title 21, and tax crimes are in Title 26.³ But Title 18 handles the bulk of general federal offenses and essentially all of the procedural rules that apply once a federal case is underway.

When a Crime Becomes Federal

A crime only becomes a federal case when there is a specific legal hook tying it to federal authority. State governments have broad power to criminalize conduct that threatens public safety. The federal government does not; it needs a constitutional basis for every criminal statute. That connection is sometimes called a federal nexus, and without it, the case belongs in state court.

The most common bases include:

Location. Crimes committed on federal property — military bases, national parks, federal courthouses, Indian reservations — fall under federal jurisdiction regardless of what the crime is.
Interstate commerce. The Commerce Clause gives Congress authority over crimes that cross state lines or use interstate channels. Wire fraud is federal because it involves electronic communications that travel across state boundaries.⁴
Federal officers and functions. Assaulting an FBI agent, bribing a federal official, or obstructing a federal investigation all involve the federal government directly.
The postal system. Using the mail to carry out a fraud scheme or to send illegal materials triggers federal authority under the mail fraud statute and related laws.⁵
Federally insured institutions. Robbing a bank that carries federal deposit insurance is a federal crime even if the robber never crosses a state line.⁶

The same act can end up in different courtrooms depending on the details. A shoplifting case at a local store is a state matter. A theft from a federally insured bank is federal. And in some situations both the state and federal government can bring charges for the same conduct without triggering double jeopardy, because they are considered separate sovereigns.

What Title 18 Makes a Crime

Part I organizes offenses into chapters by subject. A few broad categories capture most of what federal prosecutors bring.

Crimes Against Persons

These statutes protect federal officials, foreign dignitaries, and individuals in contexts where federal authority applies. Assaults and kidnappings targeting Members of Congress, Cabinet secretaries, and Supreme Court justices carry heavy penalties, up to life in prison if the victim dies.⁷ Kidnapping, hate crimes, human trafficking, and sexual exploitation offenses also fall in this group.

Fraud and White-Collar Crimes

Wire fraud and mail fraud are the workhorses of federal prosecution. Each covers any scheme to defraud that uses electronic communications or the postal system, and each carries up to 20 years in prison, or 30 years if the scheme targets a financial institution.⁴ Bank fraud, securities fraud, health care fraud, identity theft, and embezzlement of public funds each have their own sections as well.

Crimes Against the Government

Treason — waging war against the United States or aiding its enemies — carries a minimum of five years in prison and a maximum of death.⁸ Perjury, lying under oath in a federal proceeding, is punishable by up to five years.⁹ Obstruction of justice, bribery of public officials, and contempt of court also live here.

Computer Crimes

The Computer Fraud and Abuse Act, codified at 18 U.S.C. § 1030, is the primary federal law on hacking and unauthorized access to computer systems. It reaches everything from breaking into government networks and stealing financial records to transmitting malicious code and trafficking in stolen passwords. Penalties scale with the severity of the intrusion and the type of data compromised.¹⁰

Conspiracy Under Section 371

Conspiracy is one of the most commonly charged federal offenses. Under 18 U.S.C. § 371, it is a crime for two or more people to agree to commit any federal offense, or to defraud the United States, if at least one of them then takes a concrete step toward carrying out the plan.¹¹

That step is called an overt act, and it does not have to be illegal on its own. Renting a car, opening a bank account, or buying a prepaid phone can all count if the act was taken to move the conspiracy forward. Once someone takes that step after the agreement, the conspiracy is complete, even if the group never follows through on the underlying plan.

The general conspiracy statute carries up to five years in prison. If the conspiracy targets a misdemeanor, the punishment cannot exceed the maximum penalty for that misdemeanor. Prosecutors frequently charge conspiracy alongside the substantive offense, which gives them two shots at conviction from the same set of facts.

Time Limits on Federal Prosecution

Federal prosecutors do not have unlimited time to bring charges. The general statute of limitations for non-capital federal offenses is five years from the date the crime was committed, meaning an indictment must be returned or a criminal complaint filed within that window.¹² Miss the deadline and the prosecution is barred, regardless of how strong the evidence is.

There are important exceptions. Crimes punishable by death have no statute of limitations at all.¹³ Congress has enacted longer limitation periods for specific categories, including many fraud offenses involving financial institutions (ten years) and certain terrorism and child-victim offenses (extended or eliminated).

The clock can also be paused, or tolled. The most common trigger is fugitive status. Time spent fleeing the jurisdiction where the crime occurred does not count toward the limitations period, so prosecutors can pick up where they left off once the person is located.

How Federal Sentencing Works

Sentencing under Title 18 is more structured than most people realize. It combines a statutory classification system, advisory guidelines, and a set of factors the judge must consider.

Offense Classification

Every federal crime falls into a class based on the maximum prison sentence it carries. Section 3559 sets the tiers:

Class A felony: life imprisonment or the death penalty
Class B felony: 25 years or more
Class C felony: 10 to less than 25 years
Class D felony: 5 to less than 10 years
Class E felony: more than 1 year but less than 5 years
Class A misdemeanor: more than 6 months up to 1 year
Class B misdemeanor: more than 30 days up to 6 months
Class C misdemeanor: more than 5 days up to 30 days
Infraction: 5 days or less, or no imprisonment

¹⁴

These classifications matter for more than the potential prison term. They determine the maximum fine, the length of supervised release, and whether the defendant was entitled to a grand jury indictment. Many other provisions throughout the code key off them.

Sentencing Guidelines and Judicial Discretion

Federal judges do not simply pick a number between zero and the statutory maximum. Under 18 U.S.C. § 3553, a judge must impose a sentence that is “sufficient, but not greater than necessary” to achieve the purposes of sentencing, which include reflecting the seriousness of the crime, deterring future criminal conduct, protecting the public, and providing rehabilitation.¹⁵

The U.S. Sentencing Commission publishes guidelines that calculate a recommended range based on the severity of the offense and the defendant’s criminal history. Since the Supreme Court’s 2005 decision in United States v. Booker, those guidelines are advisory rather than mandatory. Judges must consider them but can depart from the recommended range if they explain their reasoning. In practice, the guidelines still drive the majority of federal sentences.

Mandatory Minimums

For certain crimes, Congress has stripped judges of the ability to go below a specific prison term. Mandatory minimums override the guidelines and prevent a judge from considering individual circumstances that might otherwise justify a shorter sentence. The best-known example is 18 U.S.C. § 924(c), which imposes a mandatory minimum of five years for possessing a firearm during a violent crime or drug trafficking offense, seven years for brandishing it, and ten years for firing it, all on top of whatever the underlying crime carries.¹⁶

Because mandatory minimums are triggered by the charges a prosecutor decides to file, they effectively shift sentencing power from judges to prosecutors and give the government more leverage in plea negotiations.

Fines, Restitution, and Assessments

Prison is not the only financial consequence. Fines, restitution orders, and mandatory assessments can add up to substantial amounts, and financial obligations do not disappear after release.

The general fine structure in 18 U.S.C. § 3571 caps individual fines at $250,000 for a felony and $100,000 for a Class A misdemeanor. Organizations face higher limits, up to $500,000 for a felony.¹⁷ Those caps can be overridden. If the crime produced financial gain to the defendant or financial loss to the victim, the fine can be set at up to twice that amount, which sometimes produces fines far exceeding the standard maximums.

Restitution is often not optional. Under 18 U.S.C. § 3663A, courts must order defendants convicted of crimes of violence, property offenses, and fraud to repay their victims for losses caused by the crime, including lost income, medical costs, and property damage directly tied to the offense.¹⁸ Fines go to the government; restitution goes to the people who were harmed.

Every federal conviction also triggers a mandatory special assessment fee. The amounts are fixed by statute: $100 per felony and $25 per Class A misdemeanor for individuals, and $400 per felony and $125 per Class A misdemeanor for organizations.¹⁹ These fund the Crime Victims Fund. They are small compared to fines and restitution, but they are imposed automatically and cannot be waived by the judge.

Supervised Release After Prison

Federal sentences do not end when the prison doors open. Nearly every federal sentence includes a term of supervised release, a period of monitoring during which the defendant must follow court-imposed conditions. It functions something like parole but is legally distinct and is imposed by the sentencing judge at the original sentencing rather than by a parole board.

The maximum terms depend on offense classification: up to 5 years for a Class A or B felony, up to 3 years for a Class C or D felony, and up to 1 year for a Class E felony or misdemeanor.²⁰ For serious offenses like terrorism or sex crimes, supervised release can last for life.

Typical conditions include reporting to a probation officer, maintaining employment, submitting to drug testing, and avoiding contact with other convicted individuals. Violating those conditions can send a defendant back to prison, and judges have broad discretion over how harshly to punish violations.

Right to a Lawyer

Anyone facing federal criminal charges who cannot afford a lawyer is entitled to have one appointed at government expense. Under 18 U.S.C. § 3006A, federal courts must advise defendants of this right and appoint counsel for anyone financially unable to hire an attorney. It applies to felony and Class A misdemeanor charges, probation and supervised release violations, juvenile proceedings, and any other case where the defendant faces loss of liberty.²¹

In practice, a federal public defender or a private attorney from a court-appointed panel takes the case. Defendants who want to hire their own attorney are free to do so. Nobody goes through the federal criminal system without a lawyer unless they knowingly and voluntarily waive that right.

1
Office of the Law Revision Counsel. Title 18 — Crimes and Criminal Procedure
2
Office of the Law Revision Counsel. 18 USC 111 – Assaulting, Resisting, or Impeding Certain Officers or Employees
3
Office of the Law Revision Counsel. 21 US Code 802 – Definitions
4
Office of the Law Revision Counsel. 18 US Code 1343 – Fraud by Wire, Radio, or Television
5
Office of the Law Revision Counsel. 18 USC 1341 – Frauds and Swindles
6
Office of the Law Revision Counsel. 18 US Code 2113 – Bank Robbery and Incidental Crimes
7
Office of the Law Revision Counsel. 18 US Code 351 – Congressional, Cabinet, and Supreme Court Assassination, Kidnapping, and Assault
8
Office of the Law Revision Counsel. 18 USC 2381 – Treason
9
Office of the Law Revision Counsel. 18 US Code 1621 – Perjury Generally
10
Office of the Law Revision Counsel. 18 US Code 1030 – Fraud and Related Activity in Connection with Computers
11
Office of the Law Revision Counsel. 18 USC 371 – Conspiracy to Commit Offense or to Defraud United States
12
Office of the Law Revision Counsel. 18 USC 3282 – Offenses Not Capital
13
Office of the Law Revision Counsel. 18 US Code 3281 – Capital Offenses
14
Office of the Law Revision Counsel. 18 US Code 3559 – Sentencing Classification of Offenses
15
Office of the Law Revision Counsel. 18 USC 3553 – Imposition of a Sentence
16
Office of the Law Revision Counsel. 18 USC 924 – Penalties
17
Office of the Law Revision Counsel. 18 USC 3571 – Sentence of Fine
18
Office of the Law Revision Counsel. 18 USC 3663A – Mandatory Restitution to Victims of Certain Crimes
19
Office of the Law Revision Counsel. 18 US Code 3013 – Special Assessment on Convicted Persons
20
Office of the Law Revision Counsel. 18 USC 3583 – Inclusion of a Term of Supervised Release After Imprisonment
21
Office of the Law Revision Counsel. 18 USC 3006A – Adequate Representation of Defendants