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Germany — Residence Permit: 6-Month Absence Rule (§ 51 AufenthG)

The Bounded TeamResidencyOctober 2026

Part of the guide Tax Residency vs Domicile vs Residence Permit: What Each One Means and Where They Conflict

Summary

Limit
Re-enter within 6 months (Aufenthaltserlaubnis and Niederlassungserlaubnis)
EU Blue Card
12 months, also for Blue Card family members
Daueraufenthalt-EU
12 consecutive months outside the EU (time in Denmark or Ireland counts as outside), or 6 years outside Germany
Longer period
Set by the Ausländerbehörde, before the 6 months run out
Effect
The title expires by law (erlischt); no decision is needed
Basis
§ 51(1) nos. 6–7, (2)–(4), (9), (10) AufenthG

A German residence permit generally expires if you leave Germany and do not come back within six months (Section 51(1) No. 7 Residence Act), checked 9 October 2026. The rule is written as a re-entry deadline, not a day count: what matters is whether you crossed back into Germany before six months from your departure, or before a longer period your Ausländerbehörde has fixed. It applies to the temporary Aufenthaltserlaubnis and to the permanent Niederlassungserlaubnis. A separate limb, no. 6, ends a title on the day you leave if the move is not temporary in nature.

What § 51 says

§ 51(1) AufenthG lists the events that end a residence title. Two concern leaving Germany:

  • No. 6: the title expires "wenn der Ausländer aus einem seiner Natur nach nicht vorübergehenden Grunde ausreist", i.e. when you leave for a reason that is not temporary in nature. Giving up your flat, deregistering, moving your job and family abroad: each is evidence of a permanent departure, and the title can end on day one.
  • No. 7: the title expires when you have left and "nicht innerhalb von sechs Monaten oder einer von der Ausländerbehörde bestimmten längeren Frist wieder eingereist ist": you have not re-entered within six months, or within a longer period set by the Ausländerbehörde.

No. 7 is a fixed deadline: six months, unless the Ausländerbehörde has set a longer period. Because the title expires by operation of law (kraft Gesetzes), there is no letter or decision: you find out when you try to re-enter or renew.

The rest of § 51 adjusts the period for particular groups: (2) long-term residents and spouses of Germans, (3) military service, (4) when a longer period is normally granted, (9) the Daueraufenthalt-EU, and (10) the twelve-month period for the Blue Card. The same section is separate from German tax residency and from the absence limits that apply to naturalisation.

How the six months run

  1. 1The clock starts on the day you leave Germany (the Ausreise). It does not matter whether you go to another EU country or further afield: for an Aufenthaltserlaubnis or Niederlassungserlaubnis the test is re-entry into Germany itself.
  2. 2Six months are calendar months, not 180 days: under § 188(2) BGB a departure on 15 January gives you until the end of 15 July to re-enter.
  3. 3Re-entering Germany before the deadline stops that clock, and the next departure starts a fresh six months.
  4. 4A brief return does not protect you if your life has moved abroad. Frankfurt's Ausländerbehörde warns that a title can still expire, even with absences under six months, when short stopovers in Germany point to your centre of life having shifted. That is no. 6, not no. 7.
  5. 5If a longer period has been set, your deadline is that date instead. It is the date on the certificate, not six months plus the extension.

Because the period is defined by calendar months rather than days, two trips of the same length in days can end on different dates. When you plan, work from the date you will actually re-enter, and keep the boarding pass or entry stamp that proves it.

Worked example

A work project that outgrows six months

Priya holds an Aufenthaltserlaubnis for skilled employment in Hamburg. She flies to Bangalore on 15 January 2026 for a project her German employer is running there, planned for five months. Without anything further she must re-enter Germany by 15 July 2026.

In May the project is extended to October. On 2 June 2026, still inside the six months, she applies from India to the Hamburg Ausländerbehörde for a longer period under § 51(1) no. 7, attaching a letter from her employer confirming the end date and her return to the Hamburg office. The decision is discretionary for an Aufenthaltserlaubnis, but the absence is plainly temporary, and the authority sets her re-entry deadline at 31 October 2026. She returns on 20 October and her title is intact.

Had she waited until August to ask, the title would already have expired on 15 July, and she would need a new visa from the German consulate in India to come back.

Who gets more time

  • EU Blue Card holders (§ 51(10)). Twelve months instead of six, for the Blue Card itself and for family members holding permits under §§ 30, 32, 33 or 36.
  • 15-year residents with a Niederlassungserlaubnis (§ 51(2)). The permit does not expire under nos. 6 and 7 at all, for the holder and the cohabiting spouse, if livelihood is secured and there is no expulsion interest under § 54(1) nos. 2–5 or § 54(2) nos. 5–7. Separately, § 51(10) gives 15-year residents and their spouses who are 60 or older twelve months instead of six.
  • Spouses of Germans (§ 51(2)). The Niederlassungserlaubnis of a foreign national living in marriage with a German does not expire under nos. 6 and 7 unless there is an expulsion interest under § 54(1) nos. 2–5 or § 54(2) nos. 5–7. Unlike the 15-year rule, there is no livelihood condition.
  • Daueraufenthalt-EU (§ 51(9)). Twelve consecutive months outside the territory where EU long-term status can be acquired, i.e. outside the EU or in Denmark or Ireland (24 for former Blue Card holders and their families), or six years outside Germany. Paragraphs (2) to (4) apply to these periods too.
  • Military service (§ 51(3)). Overstaying only because of compulsory service at home does not end the title if you re-enter within three months of discharge.
  • EU mobility for students, researchers and ICT staff (§ 51(1a)). An ICT card, or a permit for study (§ 16b) or research (§ 18d), does not expire under nos. 6 and 7 when you carry out part of the transfer, studies or research in another EU member state under the relevant EU directive.
  • Recognised refugees (§ 51(7)). The title does not expire on departure while you hold a valid refugee travel document issued by a German authority.
  • Multiple-entry and long-stay visas. A visa issued for multiple entries or for more than 90 days does not expire under nos. 6 and 7 (final sentence of § 51(1)).

Keeping or restoring status

Before you leave, or while abroad

Apply to your local Ausländerbehörde for a longer period under § 51(1) no. 7. Frankfurt, for example, issues it as a Reisebescheinigung under § 51. Explain why the absence is temporary and when you will return: a secondment letter, university confirmation or medical evidence. Apply before you go if you can; from abroad it must arrive before the six months expire. Carry the certificate when you fly back.

If you rely on the 15-year or spouse-of-a-German protection in § 51(2), ask for the Bescheinigung über den Fortbestand der Niederlassungserlaubnis: the Act obliges the authority at your last habitual residence to issue it on request.

After the title has expired

There is no reinstatement. You apply for a new national visa at the German mission in your country of residence and then for a new residence title in Germany, meeting the current requirements for your purpose of stay. Former holders of a Niederlassungserlaubnis do not get it back automatically; check with the mission or a lawyer which route fits.

Frequently asked questions

Six months. Under § 51(1) no. 7 of the Residence Act (AufenthG), a residence title expires if you leave Germany and do not re-enter within six months, or within a longer period your Ausländerbehörde has set. That covers the Aufenthaltserlaubnis and the Niederlassungserlaubnis alike. The EU Blue Card, and permits held by Blue Card family members, get twelve months under § 51(10).

Yes, but only while the six months are still running. Ausländerbehörden such as Frankfurt's accept the application before departure or from abroad within the six-month period. Once the six months have passed without a longer period being set, the title has expired by law.

Not automatically, but § 51(4) says a longer period is set 'as a rule' in two situations: you hold a Niederlassungserlaubnis and are leaving for a temporary reason, or your stay abroad serves the interests of the Federal Republic of Germany. Outside those cases it is discretionary.

Not under the absence rules, if two conditions hold. § 51(2) says the Niederlassungserlaubnis of someone with at least 15 years of lawful residence, and of their cohabiting spouse, does not expire under nos. 6 and 7 as long as their livelihood is secured and there is no expulsion interest under § 54(1) nos. 2–5 or § 54(2) nos. 5–7. On request, the Ausländerbehörde at your last place of habitual residence issues a certificate confirming the permit continues.

For time spent in other EU member states, yes. Under § 51(9) the EU long-term residence permit expires only after twelve consecutive months outside the territory where EU long-term status can be acquired (24 months for former Blue Card holders and their families), after six years outside Germany, or when you acquire long-term status in another member state. Time in another EU member state counts as inside that territory, except Denmark and Ireland: Berlin's immigration office treats time there like time outside the EU.

It is carved out. § 51(3) says the title does not expire under no. 7 if the six months were exceeded only because of statutory military service in your home country, provided you re-enter within three months of being discharged.

This rule is tracked automaticallyinBounded

  • Automatically tracks your days for this rule
  • Warns you before an absence puts your status at risk
  • Counts arrival and departure days correctly
  • Runs alongside your other visa, tax, and residency rules
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Sources

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Related rules

Germany — 183-Day Tax Residency Rule>6 months continuous (≈183 days)
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Australia — Resident Return Visa Maintenance730 days / 5 years
Brazil — Permanent Residency: 2-Year Absence RuleNo single absence over 2 years (730 days)
Canada — PR Maintenance (730 Days in 5 Years)730 days / 5 years
Czech Republic — Permanent Residence: Absence Caps≤310 days total / 5 yrs + ≤6 months at once

For information only. This page is a plain-English summary of publicly available rules, not tax, legal, or immigration advice. Rules change and depend on your personal circumstances — always confirm with the official source above and a qualified professional before acting.