ARTICLE · 17 MARCH 2026

Social Security Practice: Important Information For Applying For A1 Certificates / Certificates Of Coverage (CoC)

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The process for applying for an A1 certificate or certificate of coverage (CoC) has changed slightly.

SwitzerlandEmployment and HR

Friederike V. Ruch

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For the German version, please read here ))

The process for applying for an A1 certificate or certificate of coverage (CoC) has changed slightly.

There are three different situations to consider regarding the application process. We will illustrate these with examples.

Example 1

Peter Müller is Swiss and lives in Zurich (Switzerland). He is being assigned by his Swiss employer, XY AG, for 6 months to implement a new SAP system at the French subsidiary.

He is to remain insured under theSwiss social security system.

This is possible. XY AG must obtain an A1 certificate for this purpose.

What applies to assignments?

Reason for issuing the certificate: Assignment
Legal basis: Regulation No 883/2004 or bilateral agreements

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