There is no single deadline that applies to every “federal detainer.” An ICE request for temporary custody after local release eligibility is different from a criminal detainer for untried charges, a probation warrant, or a court order. The immigration-detainer regulation describes a period not exceeding 48 hours, excluding Saturdays, Sundays, and holidays, to permit immigration authorities to assume custody after the person is otherwise eligible for release. [1]
Rules that determine the answer
The frequently quoted 120- and 180-day periods concern the Interstate Agreement on Detainers, not a general maximum jail stay. For a qualifying sentenced prisoner with an untried indictment, information, or complaint underlying a detainer, Article III generally uses 180 days after the required disposition request reaches the prosecutor and appropriate court. Article IV generally uses 120 days after arrival in the receiving jurisdiction on its request. Continuances and other statutory conditions matter. [2]
ICE’s detainer directive separately requires prompt custody transfer and cancellation when officers cannot assume custody within its permitted period. Do not assume that the regulation’s weekend language overrides a shorter applicable policy or legal limit. [3] Once ICE actually assumes custody, separate immigration-detention authority governs; the detainer’s short transfer period is not a promise of release from all immigration detention. Probation or parole holds also do not become Agreement-on-Detainers cases merely because someone uses the word “detainer.” [4] Identify the precise authority before applying any clock.
What to do next
- Obtain the actual hold document and identify whether it is an ICE detainer, criminal warrant, interstate detainer, supervision hold, or another order.
- Determine whether the person is already eligible for release on every underlying local charge; time spent serving another lawful sentence is not automatically ICE-only detention.
- For an immigration detainer, document the otherwise-eligible release time and promptly ask counsel to examine any continued custody beyond the applicable limit.
- For a qualifying interstate criminal detainer, have counsel review the proper request, delivery, transfer, continuance, and anti-shuttling requirements before calculating a trial deadline.
Practical example
A sentenced state prisoner learns of federal untried charges. Sending an informal letter to the jail does not necessarily trigger the Agreement’s 180-day clock; the statute specifies a written request, accompanying custodial information, and delivery requirements. Conversely, a person held after posting local bail under an ICE detainer is not waiting for the Agreement’s 180-day trial period to run.
For related situations, see getting a detainer lifted and ICE immigration detainers.
Primary sources
- 8 CFR 287.7: temporary custody under an immigration detainer
- Interstate Agreement on Detainers: Articles III and IV
- ICE Directive 10074.2: transfer and detainer-cancellation policy
- DOJ: applicability and exclusions under the Interstate Agreement on Detainers
Sources checked: October 31, 2026.