In the federal system, how long you can be held without bond depends on two clocks. A judge must find probable cause within 48 hours of a warrantless arrest, and once you are ordered detained pending trial, the Speedy Trial Act generally requires your trial to begin within 90 days. Those numbers set the frame, but excludable delays, continuances, and the type of charge routinely stretch the actual time in custody well past 90 days. State timelines differ, though the federal rules described here shape how courts across the country think about the question.
The 90-Day Limit on Pretrial Detention
The controlling statute for a person held without bond is 18 U.S.C. § 3164. A person in custody solely because they are awaiting trial must have their trial begin within 90 days, and if the government misses that deadline through no fault of the defendant or defense counsel, the court must release the detainee. The statute leaves no room for discretion on that point: “no detainee shall be held in custody pending trial” after 90 days.1Office of the Law Revision Counsel. 18 USC 3164 – Persons Detained or Designated as Being of High Risk
That 90-day figure sits inside the broader Speedy Trial Act framework. The government has 30 days from arrest to indict, and once a not-guilty plea is entered, trial must begin within 70 days.2Office of the Law Revision Counsel. 18 USC 3161 – Time Limits and Exclusions
The catch is the length of the Act’s excludable delay list. The clock stops for pretrial motions, court-granted continuances, mental competency evaluations, interlocutory appeals, and periods when the defendant is unavailable. Complex cases, especially those with multiple defendants or heavy discovery, routinely see these exclusions push the real calendar well past three months. Defense counsel sometimes agree to continuances for strategic reasons, which also pauses the clock. The statute still gives someone sitting in jail a real argument when the government is not moving.
When a Judge Can Deny Bond in the First Place
Under the federal Bail Reform Act, a judge must order pretrial detention if no combination of conditions will reasonably ensure both the defendant’s appearance at trial and the safety of the community. The government has to prove dangerousness by clear and convincing evidence.3Office of the Law Revision Counsel. 18 USC 3142 – Release or Detention of a Defendant Pending Trial
The Supreme Court upheld this preventive detention scheme in United States v. Salerno, 481 U.S. 739 (1987), holding that detaining someone without bond based on community safety does not violate the Eighth Amendment. Nothing in that amendment, the Court said, limits the government’s interest in setting bail solely to preventing flight; when Congress identifies a compelling interest like public safety, the Constitution does not require release.4Justia U.S. Supreme Court Center. United States v. Salerno, 481 US 739 (1987)
Judges weigh four things when deciding whether to detain you: the nature and seriousness of the charges, the weight of the evidence, your personal history and characteristics (criminal record, community ties, employment), and the danger release would pose. A pretrial services report on your background, family situation, and employment feeds into that assessment.
The government cannot ask for a detention hearing on just any arrest. It has to be a listed category: crimes of violence, terrorism-related offenses carrying 10 or more years, offenses punishable by life or death, major drug offenses, repeat felony offenders with qualifying priors, and felonies involving a minor victim, a firearm, or failure to register as a sex offender. A judge can also order a hearing on the court’s own initiative if there is a serious risk of flight, obstruction, or witness or juror tampering.3Office of the Law Revision Counsel. 18 USC 3142 – Release or Detention of a Defendant Pending Trial
Certain charges also trigger a rebuttable presumption in favor of detention. If the judge finds probable cause to believe you committed a drug trafficking offense punishable by 10 or more years, a terrorism-related offense, a human trafficking offense punishable by 20 or more years, or certain crimes against minors, the starting point is that no release condition will work. You can present evidence to overcome the presumption, but the burden of production shifts to you.3Office of the Law Revision Counsel. 18 USC 3142 – Release or Detention of a Defendant Pending Trial
The 48-Hour Probable Cause Clock
Before any bond decision, there is a shorter deadline. After a warrantless arrest, the Fourth Amendment requires a judge to determine whether probable cause exists before someone can be held for an extended period, under Gerstein v. Pugh, 420 U.S. 103 (1975). The Supreme Court fixed the timing in County of Riverside v. McLaughlin, 500 U.S. 44 (1991), holding that a probable cause hearing within 48 hours is presumptively reasonable.5Justia U.S. Supreme Court Center. County of Riverside v. McLaughlin, 500 US 44 (1991)
Go past 48 hours and the burden flips to the government to show a genuine emergency or extraordinary circumstance justified the delay. Weekends and administrative backlogs do not qualify.5Justia U.S. Supreme Court Center. County of Riverside v. McLaughlin, 500 US 44 (1991) This hearing decides only whether the arrest was supported by probable cause. Whether you get bail is a separate question decided under the rules above.
Challenging a No-Bond Order
A detention order is not final. Under 18 U.S.C. § 3145, if a magistrate judge orders you detained, you can file a motion asking the district court to revoke or amend the order, and the court must decide it promptly.6Office of the Law Revision Counsel. 18 USC 3145 – Review and Appeal of a Release or Detention Order This is usually the strongest first move. The district judge reviews the question fresh and can reach a different result, especially when the defense brings stronger evidence of community ties, a job, or a workable supervision plan.
If the district court still holds you, § 3145 allows an appeal to the circuit court, and that appeal must also be determined promptly.6Office of the Law Revision Counsel. 18 USC 3145 – Review and Appeal of a Release or Detention Order
Even without a formal appeal, you can request a bond review hearing when circumstances change. A new job offer, a proposed third-party custodian, completion of a treatment program, or a weakening of the government’s evidence can all justify reopening the question. Defense counsel use these hearings to introduce letters of support, GPS monitoring proposals, and other release conditions the court may not have considered the first time.
A writ of habeas corpus is also available to pretrial detainees who believe their custody violates constitutional rights. In practice, the § 3145 process handles most challenges, and habeas functions as a backstop when standard procedures fail or when the detention itself raises due process concerns beyond the Bail Reform Act.7United States Courts. Habeas Corpus
What Happens If the Time Limits Expire
Blow past the 90-day § 3164 deadline and the detainee has to be released. Blow past the broader Speedy Trial Act clock and the charges must be dismissed. Whether that dismissal is with or without prejudice, meaning whether the government can refile, is up to the court, which considers the seriousness of the offense, the circumstances of the delay, and the impact on the administration of justice.2Office of the Law Revision Counsel. 18 USC 3161 – Time Limits and Exclusions
Holds for Probation and Supervised Release Violations
If you are arrested for violating probation or supervised release rather than for a new charge alone, the timing rules are different and generally worse for you. Under Federal Rule of Criminal Procedure 32.1, you must be brought before a magistrate judge without unnecessary delay for a prompt preliminary hearing on whether probable cause exists to believe a violation occurred.8Legal Information Institute. Federal Rules of Criminal Procedure Rule 32.1 – Revoking or Modifying Probation or Supervised Release
The revocation hearing itself must happen “within a reasonable time,” but the rule does not attach a number of days. When the alleged violation is a new criminal charge, courts commonly delay the revocation hearing until the new case is resolved, which can leave someone on a no-bond hold for months. Bond in this posture is not guaranteed, and the court has broad discretion over custody in the meantime.
Credit for Time Served
Time spent in pretrial detention is not lost if you are convicted. Under 18 U.S.C. § 3585(b), you receive credit for any time in official detention before your sentence begins, so long as it was connected to the offense of conviction or to another charge arising after that offense, and the time has not already been credited against a different sentence.9Office of the Law Revision Counsel. 18 USC 3585 – Calculation of a Term of Imprisonment
The credit applies automatically, but the Bureau of Prisons runs the calculation after sentencing, not the sentencing judge. Mistakes happen. Check the math, or have your attorney check it. For someone held for months on a charge that ends up carrying a short sentence, pretrial credit can mean release at or shortly after sentencing.