At the 15th Conference of Parties (COP15) of the UNFCCC in Copenhagen in 2009, developed countries committed to a collective goal of mobilising USD 100 billion per year by 2020 for climate action in developing countries, in the context of meaningful mitigation actions and transparency on implementation (UNFCCC, 2009[1]). The goal was formalised in the Cancun Agreements adopted at COP16 (UNFCCC, 2010[2]). At COP21 in Paris, the annual USD 100 billion goal was extended to 2025 (UNFCCC, 2015[3]).Since 2015, at the request of donor countries, the OECD has produced analyses of progress towards this goal1. These analyses are based on best-available data and a robust accounting framework, consistent with the outcome of COP24 agreed to by all Parties to the Paris Agreement as regards the funding sources and financial instruments related to reporting of information on financial resources provided and mobilised through public interventions (UNFCCC, 2019[4]).OECD figures capture four distinct components of climate finance provided and mobilised by developed countries: (i) Bilateral public climate finance provided by developed countries' bilateral agencies and development banks; (ii) Multilateral public climate finance provided by multilateral development banks and multilateral climate funds, attributed to developed countries; (iii) Climate-related officially supported export credits, provided by developed countries' official export credit agencies, and (iv) Private finance mobilised by bilateral and multilateral public climate finance, attributed to developed countries.