Climate finance – the transfer of public funds from developed countries to developing countries to support action on climate change – is an obligation of rich countries. It is not aid or charity. It is a moral and legal responsibility under the 1992 United Nations Framework Convention on Climate Change (UNFCCC). If done correctly, climate finance can catalys e the shift to alternative systems for energy, production and consumption that are compatible with the l imits of the planet and are aimed at meeting the needs of people. Two of the main issues at Paris will be: the roadmap to deliver existing commitments on Climate Finance, to help developing countries develop clean energy; Loss and Damage Mechanism, to help developing countries deal with existing climate change impacts, and prepare for future ones. This briefing sets out changes needed to make climate finance fit for purpose, and the UK’s role in achieving that.