The Green Fiscal Policy Reform Network facilitates knowledge sharing about fiscal policy reforms in support of countries’ green economy transition by providing an infrastructure of web-based resources and guidance to facilitate collective learning. Building on existing knowledge accumulated in key partner organizations, the network provides good practices and lessons learned on issues such as carbon pricing, reform of energy subsidies, and implementation of fuel taxes to address environmental concerns. Specific country cases are also presented to cross-fertilize countries’ implementation of green fiscal policy reforms.