Courts are increasingly asked to deal with fundamental political disagreements in liberal democracies. Because of its political salience and the extent of its consequences, the crisis of the Economic and Monetary Union (EMU) has exposed such fundamental disagreements between and within its member states, which numerous plaintiffs have brought before domestic courts and the Court of Justice of the European Union (CJEU). This article analyses this judicialisation of the EMU crisis. Using a database on lawsuits introduced in all 28 member states with regard to crisis measures and the new EMU governancemechanisms introduced since 2010, the authors study which actors use the courts and under which circumstances. Based on a combination of judicialisation and political economy approaches, the article develops a series of assumptions on actors’ motivations in order to understand the reasons for judicialisation in debtor and creditor countries.