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Immigration detention

How long may immigration detention last? Maximum periods under section 80 FPG

Duration and maximum periods of immigration detention under section 80 FPG: four months as the basic rule and up to eighteen months under section 80 para 4 FPG.

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23 June 2026 · Mag. Christopher Angerer, Rechtsanwalt

Anyone taken into immigration detention, or who has a relative in such detention, quickly asks a central question: how long may this detention actually last? Immigration detention is not a punishment; it serves solely to secure proceedings or a removal. That is precisely why it is strictly limited in time and subject to strict conditions for any extension.

This post explains the duration and the maximum periods of immigration detention under section 80 FPG. As a basic rule, for adults a maximum period of four months applies. Only under the special conditions of section 80 para 4 FPG may detention last up to eighteen months. Above all stands the principle that immigration detention may only be maintained as long as the securing purpose requires and the removal is pursued diligently.

What is your concern about the duration?

Maximum period, extension, delay or legal protection, what do you need?

Immigration detention is limited in time under section 80 FPG and tied to the diligent conduct of proceedings. Choose the topic that concerns you right now and you will receive an assessment with concrete first steps and the matching in-depth reading.

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01 Question 1

What is your concern about the duration of immigration detention?

Immigration detention is limited in time. Under section 80 FPG it may only last as long as the securing purpose requires, and the removal must be pursued diligently. Choose what your situation is right now.

All paths at a glance

Overview of all answers.

01

For adults, section 80 FPG sets a maximum period of four months where no special case applies.

Immigration detention is not a punishment and therefore has clear time limits. Under section 80 FPG it may only be maintained as long as the securing purpose requires and the removal is pursued with the necessary diligence. As a basic rule, for adults a maximum period of four months applies where none of the special cases is present. For adolescent minors section 80 FPG provides a separate, shorter limit. Proportionality remains an independent standard at every stage.

What to do now: First, record the exact start of detention, because the periods run from it. Second, have it examined whether a ground for detention under section 76 FPG exists at all and whether a more lenient means under section 77 FPG suffices. Third, keep the state of the removal proceedings in view, because without diligent conduct the basis for further detention is missing.

In depth: immigration detention at a glance →
02

Under the special conditions of section 80 para 4 FPG, detention of up to eighteen months is possible.

Beyond the basic rule of four months, section 80 para 4 FPG permits immigration detention only under special conditions, for instance where the removal is delayed by the conduct of the person concerned, the necessary cooperation is missing or securing the removal requires it. In these cases detention may last up to eighteen months. The exact gradation of the grounds for extension follows from section 80 FPG. Even a permissible extension does not change the fact that the removal must be pursued diligently.

What to do now: First, have the ground for extension relied on by the Federal Office named precisely, because it must be specifically substantiated. Second, examine whether the lack of cooperation is actually attributable to the person concerned or whether the proceedings stall for other reasons. Third, consider whether a more lenient means under section 77 FPG still suffices even now.

In depth: immigration detention at a glance →
03

If the removal is not pursued diligently, the basis for further detention under section 80 FPG is missing.

Under section 80 FPG immigration detention may only be maintained as long as the removal is pursued with the necessary diligence. If the proceedings are delayed without good reason, for instance because necessary steps are omitted, the proportionality of further detention is called into question. What matters is whether the delay is attributable to the authority or to the person concerned. A delay caused by the person can even support an extension under section 80 para 4 FPG, whereas one caused by the authority cannot.

What to do now: First, document the timeline and record which steps were taken and when. Second, have it clarified to whom the delay is attributable, because the permissibility of further detention depends on it. Third, prepare legal protection against the detention if diligent conduct of the proceedings is no longer maintained.

In depth: detention appeal to the Federal Administrative Court →
04

The duration of detention can be controlled through the detention appeal and the ongoing continuation review.

The time limit of section 80 FPG is not self-executing; it must be enforced. Proportionality and the diligent conduct of proceedings can be reviewed through the detention appeal to the Federal Administrative Court. In addition, the continuation of detention is to be checked on an ongoing basis, so that detention ends as soon as its conditions fall away. Both on reaching the maximum period and where there is no prospect of removal, the person is to be released.

What to do now: First, have it examined whether the duration so far is still tenable in relation to the securing purpose. Second, prepare the detention appeal if proportionality or diligent conduct is doubtful. Third, use the continuation review to demand the ongoing examination of the conditions.

In depth: detention appeal to the Federal Administrative Court →

The maximum period of immigration detention under section 80 FPG

The time limit of immigration detention follows from section 80 FPG. The provision first records a principle: detention may only be maintained as long as the securing purpose requires and the removal is pursued with the necessary diligence. Two conditions are thus linked, the time limit and the diligent conduct of proceedings. If one of them falls away, the basis for further detention is missing.

As a basic rule, for adults a maximum period of four months applies where none of the special cases of section 80 FPG is present. These four months are not a guaranteed duration but an upper limit, within which proportionality must be maintained on an ongoing basis. Detention can therefore also end considerably earlier, as soon as its purpose is achieved or can no longer be achieved.

For adolescent minors section 80 FPG provides a separate, shorter limit, because the burden of detention weighs particularly heavily here. The exact form follows from the provision. In all cases proportionality remains an independent standard that is examined regardless of the maximum periods.

Extension up to eighteen months under section 80 para 4 FPG

Beyond the basic rule of four months, detention is permissible only under the special conditions of section 80 para 4 FPG. In these cases immigration detention may last up to eighteen months. The condition in each case is a specific ground described in the provision, for instance the lack of cooperation by the person concerned, a delay of the removal caused by their conduct or the securing of the removal.

The extension is therefore not automatic and not an extension in reserve. The authority must specifically substantiate the ground relied on. What matters in particular is whether a delay is actually attributable to the conduct of the person concerned. A delay caused by the authority itself does not support the extension. The exact gradation of the grounds for extension follows from section 80 FPG.

Even a permissible extension does not set aside the principle of diligent conduct of proceedings. Even during a longer detention the removal must continue to be pursued. If it turns out that a removal cannot be achieved for legal or factual reasons, the detention loses its justification, regardless of which maximum period applies in the individual case.

Periods at a glance

Maximum period and extension of immigration detention side by side

Immigration detention has a basic rule and special grounds for extension. The overview places the most important points under section 80 FPG side by side.

Comparison of the basic rule and the extension of immigration detention (section 80 FPG, section 80 para 4 FPG)
Feature Basic rule Extension
Maximum period Upper time limit Four months for adults Up to eighteen months
Legal basis Provision Section 80 FPG Section 80 para 4 FPG
Condition When applicable No special case is present Special ground, such as a lack of cooperation
Minors Special limit Separate shorter maximum period for adolescent minors Separate shorter maximum period for adolescent minors
Guiding principle Continuous standard Proportionality and diligent conduct of proceedings Proportionality and diligent conduct of proceedings

The exact gradation of the grounds for extension follows from section 80 FPG. At every stage the removal must be pursued diligently.

Legal protection and continuation review

The time limit of section 80 FPG does not take effect on its own; it must be reviewed and, where necessary, enforced. The central means is the detention appeal to the Federal Administrative Court. With it the proportionality of detention and the question of whether the removal is pursued with the necessary diligence can be examined. The duration in particular is a frequent point of leverage here.

Alongside the appeal stands the ongoing control of continuation. Immigration detention is only permissible as long as its conditions are present. If they fall away, for instance because a removal is no longer achievable, the person is to be released. The same applies on reaching the maximum period that is relevant in each case.

In practice it is advisable to document the exact start of detention and the state of the proceedings from the outset. This makes it possible to assess whether the period is still observed and whether the proceedings are progressing diligently. Where there is doubt about proportionality or diligent conduct, the detention appeal should not be deferred.

Frequently asked questions

What people often ask about the duration of immigration detention.

How long may immigration detention last at most? +

As a basic rule, for adults section 80 FPG sets a maximum period of four months where no special case applies. Under the special conditions of section 80 para 4 FPG detention may last up to eighteen months. For adolescent minors a separate, shorter limit applies.

When may detention be extended beyond four months? +

An extension beyond four months is permissible only under the special conditions of section 80 para 4 FPG, for instance where there is a lack of cooperation, a delay of the removal caused by the conduct of the person or a need to secure the removal. The authority must specifically substantiate the ground relied on.

What does diligent conduct of proceedings mean for the duration? +

Under section 80 FPG immigration detention may only be maintained as long as the removal is pursued with the necessary diligence. If the proceedings are delayed without good reason and the delay is attributable to the authority, the basis for further detention is missing. Proportionality must be maintained on an ongoing basis.

Do special periods apply to adolescent minors? +

Yes. Section 80 FPG provides a separate, shorter maximum period for adolescent minors, because the burden of detention weighs particularly heavily here. The exact form follows from the provision. In any event it is to be examined as a priority whether a more lenient means under section 77 FPG suffices.

How can the duration of immigration detention be reviewed? +

Proportionality and the diligent conduct of proceedings can be reviewed through the detention appeal to the Federal Administrative Court. In addition, the continuation of detention is to be controlled on an ongoing basis, so that the person is to be released as soon as the conditions fall away or the relevant maximum period is reached.

Topics
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