Federal False Statements & Perjury — Lying to the Government

Lying to a federal official, making a false statement in a government form, or committing perjury under oath are federal crimes that carry serious prison time — and they don't require a sworn oath or formal proceeding. Under 18 U.S.C. § 1001, the broadest of these statutes, it is a crime to knowingly lie to any federal agency, department, or official in any matter within their jurisdiction. This means a false statement to an FBI agent during an interview, a lie on a federal benefits application, or a fabrication in a regulatory filing can all result in federal prosecution — even if you weren't under oath and even if the underlying matter being investigated wasn't itself a crime.

Current Law (2026)

Legal Authority

• 18 U.S.C. § 1001 — Statements or entries generally: whoever, in any matter within the jurisdiction of the executive, legislative, or judicial branch of the federal government, knowingly and willfully falsifies a material fact, makes a materially false statement, or makes or uses a false document commits a federal crime; carries up to 5 years imprisonment (8 years for terrorism-related matters)
• 18 U.S.C. § 1621 — Perjury generally: whoever takes an oath before a competent tribunal, officer, or person and willfully states something material they do not believe to be true commits perjury; also covers written declarations under penalty of perjury under 28 U.S.C. § 1746; up to 5 years imprisonment
• 18 U.S.C. § 1622 — Subornation of perjury: whoever induces or procures another person to commit perjury is also guilty of a federal crime; up to 5 years imprisonment
• 18 U.S.C. § 1623 — False declarations before grand jury or court: a tighter statute covering false material declarations in federal court or grand jury proceedings; up to 5 years (10 years if before the Foreign Intelligence Surveillance Court); permits prosecution based on two irreconcilably contradictory statements without specifying which was false; includes a recantation defense

Section 1001: The Broadest Lying Statute

Section 1001 is the sweeping general statute that makes lying to the federal government a crime. Its scope is deliberately broad:

Three prohibited acts: Section 1001 criminalizes (1) falsifying, concealing, or covering up a material fact "by any trick, scheme, or device"; (2) making any materially false, fictitious, or fraudulent statement or representation; and (3) making or using any false writing or document. You don't have to be under oath. You don't have to be testifying. An oral lie to an FBI agent in your living room counts.

"Within the jurisdiction" of the federal government is the key phrase. This covers essentially anything involving a federal agency — applications for federal licenses or permits, Medicare and Medicaid billing, customs declarations, federal benefits forms, responses to federal regulators, and statements made during federal law enforcement investigations. If the federal government has legal authority over the subject matter, § 1001 applies.

The materiality requirement is a genuine limit. The false statement must be "material" — meaning it must have a natural tendency to influence, or be capable of influencing, the decision of the government body. A trivial inaccuracy on an immaterial detail won't sustain a conviction. But courts interpret materiality broadly: you don't have to prove the government was actually deceived or that the lie succeeded in its purpose.

Knowing and willful: The statute requires that you knew your statement was false. An honest mistake — even a negligent one — is not § 1001 conduct. The government must prove you made the statement knowing it was false. But this is often easier to prove than defendants expect: the surrounding circumstances, the obvious significance of the information, and your expertise in the subject matter all go to the jury.

Important limitations: Section 1001 does not apply to a party or their counsel for statements made to a judge or magistrate in a judicial proceeding — that carve-out protects adversarial litigation. For legislative branch matters, § 1001 only covers administrative matters (procurement, personnel, payment claims) and congressional investigations — it does not make it a crime to lie during floor debate or in campaign materials.

Perjury: Lying Under Oath

Perjury (§ 1621) is the older and more specific crime: lying under oath in a proceeding where an oath is legally authorized. Unlike § 1001, perjury requires that the person actually took an oath.

"Willfully and contrary to such oath": Perjury requires that the defendant deliberately stated something material they did not believe to be true. A careless mistake or imprecise answer is not perjury. The requirement of actual subjective belief — the defendant must have known what they were saying was false at the time — makes perjury charges harder to prove than § 1001 charges. This is why federal prosecutors often charge § 1001 false statements rather than perjury when investigating deceptive conduct.

Written declarations under penalty of perjury (28 U.S.C. § 1746): Section 1621 also covers false statements signed under penalty of perjury without a live oath. Federal law allows many declarations and certifications to substitute a signed statement under § 1746 for a sworn oath, and lying in such a declaration is criminally equivalent to perjury.

Subornation of perjury (§ 1622): If you persuade, induce, or arrange for someone else to commit perjury, you're guilty of a separate crime carrying the same penalty as perjury itself. Witness coaching that crosses into directing false testimony, or suborning false testimony before a grand jury, is as criminal as lying yourself.

False Declarations Before Grand Juries and Courts (§ 1623)

Section 1623 is a more streamlined perjury statute specifically aimed at federal court and grand jury proceedings, with several practical differences from § 1621:

The "two statement" approach: Section 1623 allows a prosecutor to charge inconsistent sworn statements — alleging that two statements made by the same defendant are irreconcilably contradictory without specifying which is the lie. This matters because witnesses sometimes give inconsistent testimony across multiple proceedings, and the government can charge the contradiction itself when it cannot prove which specific statement was false.

The recantation defense: Section 1623 provides a genuine affirmative defense: if you admit that your sworn statement was false during the same continuous proceeding, before the false statement has substantially affected the proceedings and before the falsehood was likely to be discovered, you cannot be prosecuted for it. This defense incentivizes witnesses to correct false testimony voluntarily. It is not available under § 1621.

FISA court proceedings: False declarations before the Foreign Intelligence Surveillance Court carry enhanced penalties of up to 10 years — reflecting the national security sensitivity of those proceedings.

How It Affects You

If federal agents want to interview you: You have no legal obligation to speak with FBI agents or other federal investigators — the Fifth Amendment protects you. If you choose to speak, every statement is potentially subject to 18 U.S.C. § 1001. An innocent person who misremembers a date, omits a detail, or downplays a fact they later need to correct can face a § 1001 prosecution entirely separate from whatever the underlying investigation concerned. This is why criminal defense attorneys consistently advise declining to speak with federal investigators without counsel present — not because you have anything to hide, but because § 1001 makes even well-intentioned statements dangerous. If agents come to your home or office, you can say: "I'm not going to answer questions without my attorney present. Here's my attorney's number." That is not obstruction.

If your business submits documents to the federal government: False statements on federal filings — Medicare claims, FDA submissions, SEC filings (see Sarbanes-Oxley Audit Oversight), customs declarations, grant applications, federal contracts (see Major Fraud Against the United States), and regulatory reports — routinely generate § 1001 prosecutions. These are not merely regulatory violations or civil penalties; they are federal crimes carrying up to 5 years (or 8 years for terrorism-related matters). Compliance programs that ensure accuracy in all government-facing documents are therefore also criminal risk management, not just regulatory compliance. The statute requires materiality — the false statement must be capable of influencing a government decision — but courts interpret materiality broadly, and prosecutors have discretion to charge even technically immaterial statements if the broader conduct was dishonest.

If you're testifying in federal proceedings: Perjury under § 1621 requires willful false testimony under oath on a material matter — the "two-witness rule" requires independent evidence corroborating the false statement. Grand jury perjury under § 1623 has lower proof requirements (the government can use inconsistent statements to prove falsity). Federal prosecutors treat grand jury perjury as an attack on the integrity of their investigations and pursue it aggressively. If you testified to something and later realize it was incorrect, consult counsel immediately — recantation during the same proceeding before the false testimony becomes effective may provide a defense, but the window is narrow. Contradicting yourself across different proceedings is the pattern § 1623 specifically addresses.

If you're a federal employee responding to an inspector general investigation: Government employees who make false statements in official matters face both § 1001 prosecution and civil service discipline — and the civil service discipline can proceed even if criminal charges aren't filed. Lying in an official report, a personnel document, a response to an IG investigation, or an Equal Employment Opportunity (EEO) complaint creates criminal exposure beyond the underlying misconduct. Federal employees have limited Fifth Amendment protections in their employment context: refusing to answer questions about your official duties can result in dismissal (the Garrity warning requirement exists precisely to address this tension). Consult agency counsel or a private attorney before your IG interview.

State Variations

Federal false statements and perjury statutes apply only to federal proceedings and federal government matters. Every state has its own perjury statutes for state court proceedings and state agency matters. A false statement to a state official does not violate § 1001 — it may violate a state analog. Federal and state prosecutions for the same false conduct are not double jeopardy, as they are separate sovereigns.

Pending Legislation

No major structural changes to §§ 1001 or 1621–1623 are pending as of 2026. These statutes are prosecution workhorses — they are used in virtually every significant white-collar and obstruction case, often alongside wire fraud and mail fraud charges — and neither party has proposed substantially altering them.

Recent Developments

Section 1001 prosecutions have increased alongside heightened federal investigations into government contracting fraud (see Major Fraud Against the United States), COVID-relief program fraud, and political investigations. Several high-profile prosecutions in 2017–2024 — including during the Special Counsel's Russia investigation — turned on § 1001 false statement charges for misstatements made in voluntary FBI interviews. These cases reshaped awareness of § 1001's scope, particularly the legal risk of speaking voluntarily with federal investigators about any matter that may later prove consequential.