The purpose of this paper is to verify the hypothesis that a debt write-off implemented recently by Polish authorities in favour of public hospitals constitutes State aid within the meaning of Article 107(1) of the Treaty of the Functioning of the European Union. The paper contains a detailed description of the nature of the measure – its historical background, regulatory context, as well as its construction. It presents an in-depth analysis of the fulfilment by the measure of the conditions stipulated in Article 107(1) TFEU. As a preliminary issue, the analysis addresses the problem whether Polish public hospitals can be considered as undertakings within the meaning of EU competition law, particularly, as to their activity financed by the ...