What is an A1 certificate?
The A1 certificate (Zaświadczenie A1) is an official document issued by the Polish institution
ZUS, confirming the payment of
social security contributions in Poland. It is required if a citizen works or conducts activities in European Union countries.
“The A1 certificate is proof that a person remains in the Polish social security system, even if temporarily working in another EU country.” — Ministry of Family and Social Policy.
Why is the A1 certificate needed?
According to EU legislation, social security contributions must be paid in one country. The A1 certificate confirms
that the insured person remains in the Polish system and helps avoid double contributions in other countries.
Additionally, it guarantees the right to social benefits during temporary work abroad.
Who should obtain an A1 certificate?
The document is required for:
- employees sent on business trips to EU countries;
- self-employed Polish citizens performing temporary projects outside the country;
- entrepreneurs opening branches or providing services in other EU countries.
Which documents are required to obtain an A1 certificate?
- An application on the official ZUS form specifying the purpose and duration of work abroad.
- Documents confirming status (employment contract, contract, or business registration).
- Proof of regular social security contributions in Poland (ZUS).
In some cases, ZUS may request additional information.
Application forms are available on the ZUS website.
Frequently Asked Questions
How long does it take to get an A1 certificate?
Can the application be submitted online?
Is A1 required to work in the United Kingdom?
What to do if ZUS refuses to issue the A1 certificate?
