How long you can be held on a federal detainer depends on which kind you’re facing. If it’s an immigration detainer from ICE, federal regulation caps the hold at 48 hours past your scheduled release, not counting Saturdays, Sundays, or federal holidays. If it’s a criminal federal detainer, the Interstate Agreement on Detainers Act sets a trial clock of 120 or 180 days depending on who asked for the transfer. And if you’re being held after a removal order, the Supreme Court has treated six months as the outer edge of what’s presumptively reasonable. Each of these limits has exceptions, and in practice people are sometimes held longer than the rules suggest.
The 48-Hour Limit on ICE Immigration Detainers
When ICE files an immigration detainer with a local jail, it’s asking the jail to keep you in custody for up to 48 hours after the point when you’d otherwise be released. The federal regulation setting that limit specifically excludes weekends and federal holidays from the count. If your state sentence ends Friday afternoon, the 48-hour window doesn’t begin running until Monday.
Once that window closes, the jail is supposed to let you go. Holding you longer without an ICE arrest or transfer runs into constitutional problems. Federal courts have treated delays past 48 hours before any judicial finding of probable cause as presumptively unreasonable, borrowing the reasoning from County of Riverside v. McLaughlin.
ICE has to give you a copy of the detainer notice, Form I-247. The form is available in English, Spanish, French, and Portuguese, states the 48-hour cap in writing, and lists contact information for filing civil rights complaints tied to the detainer.
Two things complicate the picture. First, immigration detainers are requests, not commands. In Galarza v. Szalczyk, the Third Circuit held that local jails aren’t legally obligated to honor them, and a jail that voluntarily complies shares responsibility for any Fourth Amendment or due process violation that results. Some jurisdictions refuse to hold people on ICE detainers unless the request comes with a judicial warrant. Second, not every jail tracks the 48-hour clock carefully, and people are sometimes held longer, particularly where local agencies coordinate closely with federal enforcement.
Criminal Federal Detainers: 120 or 180 Days to Trial
Criminal detainers work under a different framework. The Interstate Agreement on Detainers Act, adopted by nearly every state, sets hard trial deadlines once a detainer is filed against someone already serving a sentence. Missing them means the pending charges are dismissed with prejudice and cannot be refiled.
If You Request Disposition: 180 Days
If you’re serving a sentence and learn that federal charges are pending against you elsewhere, you can file a request for final disposition. Once the prosecuting jurisdiction receives that request, it has 180 days to bring you to trial.
If the Prosecution Requests Custody: 120 Days
When the federal prosecutor initiates the transfer by asking for temporary custody, the clock is shorter. Trial must begin within 120 days of your arrival in the receiving jurisdiction. Continuances can be granted for good cause, but only in open court with you or your attorney present.
The Anti-Shuttling Rule
The IADA also blocks the government from moving you between facilities and back again without completing your trial. If you’re transferred for prosecution and returned to the original facility before the case is resolved, the charges must be dismissed with prejudice.
The Federal Speedy Trial Act
Separate from the IADA, the federal Speedy Trial Act requires trial to begin within 70 days of your indictment or first court appearance, whichever comes later. The Act also guarantees at least 30 days for trial preparation unless you waive it in writing. Delays for pretrial motions, competency evaluations, and continuances granted in the “ends of justice” are excluded from the count. A violation can result in dismissal.
When Immigration Detention Runs Past 48 Hours
The 48-hour rule governs the hold at a local jail before ICE takes custody. Once ICE has you, or once you’re in immigration proceedings, the timelines change entirely.
After an immigration judge orders your removal, the government has a 90-day “removal period” to actually deport you. If removal doesn’t happen in that window, detention can continue. The Supreme Court addressed this in Zadvydas v. Davis, holding that the government can’t detain someone indefinitely when there’s no realistic prospect of removal. The Court set six months as the presumptively reasonable period. Once you’ve been held longer than that, you can challenge continued detention by showing there’s no significant likelihood of removal in the reasonably foreseeable future. At that point, the government must justify keeping you or release you.
Detention while proceedings are still pending is harder to challenge. In Jennings v. Rodriguez (2018), the Supreme Court held that the immigration detention statutes do not require periodic bond hearings or impose time limits on detention during pending proceedings. Habeas corpus challenges remain available, but the automatic protections some lower courts had recognized were pulled back.
Mandatory detention rules also matter here. If you’re detained based on certain criminal convictions, including aggravated felonies, drug offenses, firearms charges, or crimes involving moral turpitude with sentences of at least one year, you may be ineligible for a bond hearing at all. You can challenge whether you actually fall into one of those categories, but you remain in custody while that plays out.
What Happens When Jails Hold You Past the Limit
The numbers above are legal ceilings. Actual practice varies by jurisdiction. Some jails release people the moment the 48-hour clock runs out. Others hold longer, and people without attorneys are often the ones who wait past the deadline because no one is watching the calendar on their behalf.
Constitutional liability has been building on the jail side. In Morales v. Chadbourne, the First Circuit held that ICE agents need probable cause before issuing a detainer, grounded in the Fourth Amendment. The court denied qualified immunity to the agent involved. Combined with Galarza, the pattern is clear: local jails that hold people on faulty or expired detainers face real exposure, which is part of why some jurisdictions have pulled back from cooperation.
How to Challenge a Hold That’s Gone Too Long
Two tools do most of the work when detention crosses a legal line.
Habeas Corpus
A habeas corpus petition asks a federal court to decide whether your detention is lawful. It’s available to anyone in custody under federal authority, anyone held in violation of the Constitution or federal law, and anyone committed for trial before a federal court. The government has to justify keeping you. If it can’t, the court orders release. Habeas is the primary vehicle for challenging prolonged immigration detention past the Zadvydas six-month mark, and it’s available regardless of citizenship.
Federal Tort Claims Act
If detention resulted from misconduct by federal law enforcement, you may be able to seek money damages under the Federal Tort Claims Act. The FTCA generally bars false imprisonment claims against the government, but a 1974 amendment carved out an exception for claims against federal investigative or law enforcement officers, defined as officers empowered to execute searches, seize evidence, or make arrests for federal violations. An ICE agent or U.S. Marshal who held you without legal authority can be reached this way. FTCA claims require exhausting administrative remedies before filing in court, and they move slowly.
Filing a habeas petition to get out and pursuing an FTCA claim for compensation are often paired when a detention has clearly gone past what the law allows. Both need skilled counsel, and neither is fast, but they’re the accountability mechanisms available when the deadlines on paper get ignored in practice.