The Court of Justice of the European Union (CJEU) issued a judgment on 21 December 2023 concerning Portugal's solidarity bank levy. The levy was introduced as part of Law No. 27-A/2020 in July 2020 to finance the social security financial stabilization fund. The levy applies at a rate of 0.02% on the average value of certain liabilities and a rate of 0.00005% on off-balance sheet derivatives. The levy is payable by credit institutions whose head office or place of effective management is in …