Social Security & Cross-Border Rights
Applicable Social Security Legislation
The applicable social legislation determines the country of affiliation. Activities, residence, and A1 certificate guide cross-border analysis.
Lexicon
Immigration & International Mobility
A1 Certificate
The A1 certificate certifies the social security legislation applicable to a person working in a cross-border situation under European coordination. For a Luxembourg employer temporarily sending an employee abroad, it allows documenting the maintenance of Luxembourg affiliation when the conditions for posting are met.
The application requires describing the mission, the countries, and its duration. The CCSS notably recalls the conditions related to the company's activity and the link with the employee. The ordinary European posting regime provides for a maximum duration of 24 months, under conditions: this figure does not constitute automatic authorization for any mission.
Before departure, check the situation with the competent body. The certificate deals with social security; it does not replace local posting formalities, nor residence or work permits. For regular activity in several states, consider the rules of multi-activity.
Official Source
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Other Associated Definitions
Explore Complementary Concepts
Immigration & International Mobility
Cross-Border Pluriactivity
Pluriactivity corresponds to habitual work in several states. Residence and activity distribution determine the social examination.
International Mobility
Posting of Workers to Luxembourg
Posting organizes a temporary mission in Luxembourg for a foreign employer. ITM declaration, badge, and social formalities.
Social Security & Cross-Border Rights
Form S1
The S1 form is used to open healthcare rights in the country of residence. Understand its role and the electronic exchanges S072.