If you leave Switzerland for a few months without giving up your residence, you do not need to deregister, but several obligations remain. These include health insurance requirements, tax status, and formalities with migration and commune authorities.

You do not need to deregister if your residence continues

If you keep your official address in Switzerland and do not give up your lease or home, you are not required to deregister with your commune or the population office. This applies even if you are absent for several months.

If, however, you cancel your lease or move out of your registered residence, you must deregister. This is required regardless of the length of your absence.

Notify the authorities if you’re gone for more than three months

If you are a Swiss citizen leaving Geneva for more than three months, you must officially announce your departure to your commune of departure and the OCPM. The notification must be submitted no later than 14 days before departure and can be sent up to one month in advance.

If you are a foreign national holding a B or C permit and leaving Switzerland for more than three months, you must also notify the OCPM, even if you intend to keep your residence address and do not deregister.

Permit-specific rules for B and C holders

If you have a B permit (autorisation de séjour), your permit may be cancelled if you are outside Switzerland for more than six consecutive months. To preserve your permit you must notify the OCPM before departure and request to maintain your permit during your absence.

If you have a C permit (autorisation d’établissement), your permit may also be revoked if you are absent for more than six months, unless you apply in advance for authorization to extend the absence. In Geneva you may request an extension of up to four years under certain conditions.

Health insurance must remain active

Under the Federal Health Insurance Act (LAMal), all persons officially resident in Switzerland must maintain basic health insurance (assurance de base / Grundversicherung) even during temporary absences.

You can only suspend or be exempted from Swiss insurance in very limited cases, such as:

Posting abroad by a Swiss employer (with form A1)
Temporary studies abroad with recognized foreign insurance
Employment in an EU/EFTA country with proof of coverage under the local public system

In all cases, you must request exemption in advance from the cantonal health insurance office. Exemptions are not automatic.

Tax residence may continue

If your official residence remains in Switzerland, your tax obligations continue even if you are abroad for several months.

You are considered tax-resident in Switzerland if:

You are registered with a commune
You maintain a home available to you at all times
You maintain personal or economic ties in Switzerland

You must continue to file a tax return and report worldwide income unless you deregister and move tax residence abroad. If you stop working, notify the cantonal tax office to check applicable rules.

Social insurance coverage may be affected

If you stop working in Switzerland during your time abroad, your contributions to Swiss social security (AVS/AI/APG) will stop unless you continue them voluntarily.

You may be eligible to pay voluntary AVS contributions if (all conditions below must be met):

You are a Swiss citizen or EU/EFTA national
You live abroad only temporarily
You were affiliated with the Swiss system for at least five consecutive years before leaving

Voluntary contributions help prevent pension gaps. You must apply through the Caisse suisse de compensation (CSC) in Geneva.

If you remain employed by a Swiss company during your time abroad, your contributions will usually continue as normal.

Other points to consider

Before leaving, consider the following steps:

Inform your landlord and check subletting rules if applicable
Arrange for someone to manage your mail or set up a forwarding service
Check whether your household insurance covers periods of absence
Verify the health and liability insurance rules in your destination country

Temporary absences from Switzerland do not eliminate your obligations. Planning ahead helps ensure compliance with Swiss regulations and a smooth return.