If you’ve been called to testify, your rights as a grand jury witness include the Fifth Amendment privilege against self-incrimination, the right to consult a lawyer outside the grand jury room as often as you need, the right to be told the general subject of the investigation when you’re a target or subject, and the right to modest witness fees and travel reimbursement. You also carry hard obligations: appear when the subpoena says, testify truthfully under oath, and produce any documents the subpoena describes. Ignoring either side of that equation has real consequences, up to 18 months of confinement for refusing to cooperate and up to five years in prison for lying.
Know Whether You’re a Witness, Subject, or Target
The Department of Justice classifies people involved in a grand jury investigation into three categories, and which one applies to you shapes almost everything else.
A target is a person the prosecutor or grand jury has substantial evidence linking to a crime, and whom the prosecutor considers a likely defendant. A subject is a person whose conduct falls within the investigation’s scope but who has not yet been identified as a likely defendant. A witness is someone called solely because they have relevant information, with no indication of personal exposure.1United States Department of Justice. Justice Manual 9-11.000 – Grand Jury
DOJ policy requires prosecutors to attach an “Advice of Rights” form to grand jury subpoenas served on targets and subjects. That form identifies the general subject of the investigation, reminds you of your right to refuse to answer self-incriminating questions, warns that anything you say can be used against you, and tells you that you may step outside the grand jury room to consult with your attorney.1United States Department of Justice. Justice Manual 9-11.000 – Grand Jury Targets typically receive a separate target letter making that status explicit.2U.S. Department of Justice. Criminal Resource Manual 160 – Sample Target Letter
Status can shift. You may enter as an ordinary witness and become a subject or target once the grand jury hears something new. That possibility alone is a strong reason to speak with a criminal defense attorney before you testify, even if you’re confident you did nothing wrong.
What the Subpoena Requires
A grand jury subpoena is a court order, not an invitation. It commands you to appear at a specific date, time, and place. Under the federal rules, a subpoena can be served by a U.S. Marshal, a deputy marshal, or any nonparty who is at least 18 years old, and the server must also give you a one-day witness attendance fee and mileage allowance at the time of delivery.3Legal Information Institute. Federal Rules of Criminal Procedure Rule 17 – Subpoena
Read carefully what the subpoena asks for. A subpoena ad testificandum requires you to appear and answer questions. A subpoena duces tecum requires you to produce specific documents such as bank records, emails, or contracts. You can receive both at once. Gather responsive documents early and organize them by category; that reduces the risk of accidentally leaving something out and gives your attorney time to spot privilege issues.
If a subpoena is unreasonably broad or reaches privileged material, a court may quash or modify it under Rule 17, but any motion has to be filed promptly.3Legal Information Institute. Federal Rules of Criminal Procedure Rule 17 – Subpoena An attorney experienced in federal criminal practice can tell you whether that fight is worth having.
Your Right Against Self-Incrimination
The Fifth Amendment protects you from being forced to give testimony that could be used to prosecute you.4Legal Information Institute. Fifth Amendment You exercise it inside the grand jury room by clearly stating, question by question, that you are invoking your privilege against self-incrimination.
It is not a blanket refusal to answer everything. The privilege applies only to questions whose truthful answers could expose you to criminal liability. Confirming your job title or describing a public event won’t qualify. The line between safe and dangerous questions is harder to draw than most witnesses expect, which is why hallway consultations with your attorney matter so much.
Invoking the Fifth also invites a response. If your refusal blocks testimony the government considers essential, the prosecutor can ask a judge to compel it under a grant of immunity.
What Immunity Actually Does
Before a federal prosecutor can seek a compulsion order, senior DOJ leadership — the Attorney General, Deputy Attorney General, or a designated Assistant Attorney General — must approve the request.5Office of the Law Revision Counsel. 18 USC 6003 – Court and Grand Jury Proceedings
Federal immunity is “use and derivative use” immunity. The government cannot use your compelled testimony, or any evidence it discovers as a result of your testimony, against you in a future criminal case. The exception is that lying under the order still exposes you to prosecution for perjury or false statements.6Office of the Law Revision Counsel. 18 USC 6002 – Immunity Generally In any later prosecution, the government must prove every piece of its evidence came from a source completely independent of what you said.7Justia Supreme Court. Kastigar v United States, 406 US 441 (1972)
Federal immunity is not transactional immunity. Some states offer transactional immunity, which bars any prosecution for offenses related to the testimony. Federal law deliberately chose the narrower version: you can still be charged for the underlying conduct, as long as the case is built entirely from independent evidence.8U.S. Department of Justice. Criminal Resource Manual 717 – Transactional Immunity Distinguished A grant of federal immunity does not make you untouchable; it puts your specific words and their investigative fruits off-limits.
Once the court issues an immunity order and it’s communicated to you, the Fifth Amendment refusal is off the table. Refusing at that point triggers the same contempt penalties as ignoring the subpoena.
Your Right to an Attorney
You have the right to be represented by a lawyer, but your lawyer cannot come into the grand jury room. Federal rules limit who may be present during a session to the prosecutor, the witness, an interpreter if needed, and a court reporter.9Legal Information Institute. Federal Rules of Criminal Procedure Rule 6 – The Grand Jury Your attorney waits in the hallway.
You can pause the questioning and step out to talk with counsel at any point. DOJ’s own rights advisory tells witnesses that “the grand jury will permit you a reasonable opportunity to step outside the grand jury room to consult with counsel.”1United States Department of Justice. Justice Manual 9-11.000 – Grand Jury There’s no cap on how often you can do it. If a question feels dangerous, confusing, or unfamiliar, step out. Experienced witnesses treat hallway consultation as routine, not emergency.
If you cannot afford an attorney and you are a target, a court may appoint counsel. For subjects and ordinary witnesses, that right is less established, and retaining your own lawyer before the testimony date is one of the most valuable things you can do.
Inside the Grand Jury Room
The session begins with the foreperson or court reporter placing you under oath. From that moment, everything you say is on the official record, and the duty to tell the truth is legally binding.
The prosecutor leads the questioning. Grand jurors may also ask their own questions, and those carry the same weight. If you need a moment to think or want to consult your lawyer, say so. When the questioning ends, the prosecutor will tell you whether you’re released from the subpoena or subject to recall.
Grand jury proceedings are secret under federal rules, but the secrecy runs one way. Jurors, prosecutors, interpreters, and court reporters cannot disclose what happens in the room. You generally can. The advisory committee notes to Rule 6 specifically rejected imposing the secrecy obligation on witnesses.9Legal Information Institute. Federal Rules of Criminal Procedure Rule 6 – The Grand Jury Prosecutors sometimes ask witnesses not to discuss their testimony to avoid tipping off other people under investigation. That request usually isn’t legally enforceable, but ignoring it could draw scrutiny if the investigation involves obstruction concerns.
If You Realize You Said Something False
Mistakes happen under pressure. Federal law gives grand jury witnesses a narrow window to correct false testimony and avoid a perjury charge. Under the perjury statute specific to grand jury and court proceedings, you can recant a false statement during the same continuous proceeding in which you made it.10Office of the Law Revision Counsel. 18 USC 1623 – False Declarations Before Grand Jury or Court
The defense works only if two conditions are still true when you correct yourself: the false statement has not substantially affected the proceeding, and it has not become apparent that the lie has been or will be discovered.10Office of the Law Revision Counsel. 18 USC 1623 – False Declarations Before Grand Jury or Court In practice, the correction has to come quickly and voluntarily, not after the prosecutor confronts you with contradictory evidence. Lying to a grand jury otherwise carries up to five years in prison, a fine, or both.11Office of the Law Revision Counsel. 18 USC 1621 – Perjury Generally
What Happens If You Refuse
A witness who refuses to answer questions or produce documents “without just cause” can be confined for civil contempt. Confinement lasts until you comply or the grand jury’s term expires, whichever comes first, but cannot exceed 18 months.12Office of the Law Revision Counsel. 28 USC 1826 – Recalcitrant Witnesses This is not punishment for a crime. It is coercive confinement designed to pressure you into cooperating, and it ends the moment you agree to testify. After 18 months a court must release you regardless. A new grand jury can still issue a fresh subpoena.
Criminal contempt is separate and covers conduct that obstructs the grand jury’s work. The DOJ’s sample target letter warns that altering or destroying documents required by a grand jury subpoena is a serious federal offense, including obstruction of justice.2U.S. Department of Justice. Criminal Resource Manual 160 – Sample Target Letter
Fees and Travel You’re Entitled To
Federal law entitles you to a $40 attendance fee for each day you appear, including travel days spent going to and from the courthouse.13Office of the Law Revision Counsel. 28 USC 1821 – Per Diem and Mileage Generally The amount has not increased since 1990 and will not replace a day’s lost wages for most people. If you drive to the courthouse, you’re also entitled to mileage reimbursement at the GSA rate, which is $0.725 per mile for privately owned vehicles in 2026. Parking fees are reimbursable too. Witnesses who travel a significant distance receive the same lodging and meal subsistence allowances that federal employees receive on official travel. Keep receipts and contact the prosecutor’s office listed on the subpoena for the reimbursement process.
No federal statute specifically protects grand jury witnesses from employer retaliation for complying with a subpoena, though federal law does protect employees called for jury service itself. Many states have their own witness-protection employment laws, so if missing work puts your job at risk, check your state’s labor statutes or consult an employment attorney.