A rich literature examines the links between politics, money and corruption across the globe. Somewhat surprisingly, this topic has not found much attention in European Union studies. This article presents the PFxEU tracker, an open-access dataset that tracks the financial donations received by European Union political parties. It systematically codes (a) each donation received; (b) its amount; (c) the type of donor; and (d) its region of origin. Analysing the dataset, a cleavage can be observed. On one side are parties that have Eurosceptic and nationalist agendas and individual donors. On the opposite side are federalist agendas and international-business donors. Moreover, individuals form the largest donor category, and nearly half of all donations come from Central and Eastern Europe. PFxEU aims to encourage further research into European Union political financing, supports research collaboration devoted to the analysis of corruption and European Union politics and makes basic political information part of the public domain.