The necessary green transition in the EU requires substantial additional green public investment (GPI) by member countries throughout this decade and beyond. This briefing paper discusses four approaches for a reform of EU fiscal rules to better accommodate higher (debt-financed) GPI: (1) an exemption clause for GPI, (2) the implementation of a green golden rule, (3) a country-specific benchmark share of government expenditures dedicated to GPI recommended by the European Commission, and (4) an EU Climate Fund. We also discuss these options in relation to the recent Commission proposal from November 2022. This document was provided by the Economic Governance and EMU Scrutiny Unit at the request of the ECON Committee.