A1 Certificate: New Rules for Mobile Workers

Published 2026-11-05

The rules concerning the A1 certificate, which confirms that an employee is subject to Polish social security legislation, are changing. The document is important for people who work in another European Union country, for example when they are posted abroad by a Polish employer. Information about the new rules appeared in a short announcement and does not yet contain all the details.

The A1 certificate is issued by the Social Insurance Institution (ZUS). An employee needs it to prove that, while working abroad, they still pay contributions in Poland. Thanks to this, they do not have to pay contributions in two countries at the same time. The document also helps employers who send their employees to other countries, as well as control institutions that check the legality of employment.

The new regulations apply primarily to mobile workers, that is, people who often change their place of work across different countries. They may affect application procedures and the deadlines needed to obtain the document. Experts point out that it is worth following the changes on an ongoing basis, because failing to complete the formalities may lead to problems with health or pension insurance.

People interested in the topic should check the current information on the official ZUS website. There you will find guidelines on applications, required documents, and deadlines. Before going abroad, it is also worth contacting your employer or the HR department to make sure that all formalities have been completed.

Sources: Deloitte

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