Swiss B and C Permits: Six Months Abroad and Keeping Your Permit

Six months abroad is an important limit for Swiss residence permits, but deregistration and the purpose of a return visit can matter before a day counter reaches that point.

Last verified: September 2026

In short: Under the ordinary Swiss rules, a B or C permit can end on deregistration for departure abroad, or after six months abroad without deregistration. A C permit may be retained for up to four years on an approved application. Temporary visits do not necessarily interrupt the legal absence period.

Permit scope: Ordinary residence and settlement permits, B and C
Absence period: Six calendar months without deregistration
Earlier trigger: Deregistration when leaving to live abroad
C-permit retention: Application before deregistration or the six-month period expires; up to four years
Short return visits: A visit does not automatically preserve the permit
Legal basis: Foreign Nationals and Integration Act, Article 61; VZAE Article 79 and Federal Supreme Court case law

The rule

There are two different events to consider. A person who formally deregisters to leave Switzerland cannot assume that the permit continues for another six months just because the physical card has time left on it. A person who leaves without deregistering has to consider the statutory absence period instead.

The card's expiry date is not the whole answer. The status can lapse through the absence or deregistration rules even when a later expiry date is printed on the document.
Retention requires an application. The Canton of Zug's guidance explains that a C-permit holder must apply before deregistration or before the six-month period runs out. Keeping the permit for a longer absence requires the authority's approval.
A brief visit may not restart the legal period. The Federal Supreme Court explains that temporary visits for tourism, business or family visits do not interrupt the six-month period in the same way as a genuine return to residence.

A travel record can establish that a visit occurred without establishing that residence was resumed. Keep evidence of the purpose and circumstances of a return, as well as its dates.

How to count it

Keep a calendar record of the absence, but first identify whether deregistration, an approved retention arrangement or a temporary return changes the question you need answered.

Identify the permit and whether you are deregistering to leave Switzerland, or remaining registered while temporarily abroad.
Record the departure date and calculate the six-month calendar reference date. Check any retention decision for its own deadline.
Record all return visits accurately, while distinguishing a visit from a return to actual residence in the evidence you keep.
Compare the calendar record with the authority's decision. A short return visit does not necessarily restart the legal absence period.

Example. You leave on 10 March 2026 and return on 10 September. That is a six-calendar-month interval. If both travel days count as presence for this illustration, the days from 11 March through 9 September total 183 absent days.

Leaving on 10 January and returning on 10 July is also six calendar months, but gives 180 absent days by the same method. A fixed 180-day allowance cannot identify both calendar dates exactly.

Now add a short visit in June to the March trip. The physical travel record now contains two absences separated by a visit. That alone is not proof that the permit was preserved: the nature of the visit and the applicable immigration rules still have to be assessed.

Beyond the day count

C-permit retention is intended for a person who plans to return within the authorised period. Zug's guidance states that failing to return within that period ends the protection. Keep the written decision with the travel record, and ask the competent cantonal migration authority about the process before a long absence begins.

This guide addresses the ordinary B/C absence issue. Short-term permits, EU/EFTA rights and other circumstances can require different analysis. A total of recorded Swiss days cannot determine entitlement under every route. The separate Schengen short-stay rule is also not a substitute for holding a valid Swiss residence status.

AtlasDays keeps your Swiss absence dates visible

Use the Switzerland B/C Permit Absence preset to follow the current or most recent recorded absence against 180 days. Your trips remain a factual record, while the planning allowance makes a long absence easy to spot. Keep deregistration, retention approval and the legal effect of short visits separate from the app's day count. A logged Swiss stay separates absences in the calculation, even where a temporary visit would not interrupt the legal absence period.

Get AtlasDays

FAQ

Does my permit remain valid until the date printed on the card?

Not necessarily. Deregistration and the statutory absence rules can end the status before that printed date. Check the rules for your permit and circumstances.

Can a weekend in Switzerland reset the six months?

Do not assume so. A physical visit does not necessarily interrupt the legal absence period; its nature and the residence circumstances matter.

Can I keep a C permit during a longer stay abroad?

An application can allow retention for up to four years. The cantonal guidance requires applying before deregistration or before the six-month period expires; approval and the return deadline must be checked.

About this article: AtlasDays provides general information, not legal, tax, or immigration advice. Rules change and outcomes depend on your circumstances, so never rely on it alone: check the linked official source or ask a qualified professional.