This report summarizes parts I and II of the in-session workshop on long-term climate finance for 2020, organized by the secretariat and held virtually in conjunction with the UNFCCC Climate Dialogues 2020 and the May–June 2021 subsidiary bodies sessions, respectively. In line with decision 3/CP.24, the workshops focused on the effectiveness of climate finance, including the results and impacts of finance provided and mobilized, and the provision of financial and technical support to developing country Parties for adaptation and mitigation. This report will inform the fourth biennial high-level ministerial dialogue on climate finance, to be convened at the Conference of the Parties at its twenty-sixth session.