EN
This article attempts to present and explain the functioning of the market mechanism of the market of one percent. The article discusses the problem of the unintended consequences of intended actions, which were induced in to the Polish tax system by “1% mechanism”. It is about the possibility of donating 1% income tax due from individual taxpayers to public benefit organizations. As a result of the implemented regulations a market of one percent has been created, on which public benefit organizations conduct competitive struggle for money which taxpayers can dispose. This article aims to explore the mechanism of competition on the market of one percent and understand methods of competitive struggle. The article makes the hypothesis that the public benefit organizations can either alone carry the burden of competition for the 1% tax, or offload it onto their mentee. The article makes references to the statistics of the Ministry of Finance and the implementation and financial report of investigated organizations.