Working in several countries at the same time? You may have problems with the Social Insurance Institution (ZUS)
21.02.2023
EU rules do not regulate precisely where contributions must be paid for a person who simultaneously or alternately works in more than one country. Each case must be examined individually. – Kinga Polewka-Włoch and Patryk Kozieł comment for Dziennik Gazeta Prawna.
Article: here.