This discussion paper addresses open questions with regards to the financing of Nationally Appropriate Mitigation Actions (NAMAs) and aims to assist experts and practitioners involved in developing financial proposals for NAMAs. NAMAs, first introduced in the 2007 Bali Action Plan, are a relatively new international climate policy instrument aiming to address developed and developing country greenhouse gas (GHG) emissions while supporting sustainable development. Developing country NAMAs refer to mitigation actions that countries can voluntarily implement, and which they may fund domestically (unilateral NAMAs) or for which they may receive international support (supported NAMAs). This paper focuses on the financing of supported NAMAs.