This paper comes from the argument that there has been limited analysis about what specific role the public sector and public resources should play in mobilising private investment in climate-compatible development (CCD). It describes a methodology to support governments and development partners that wish to mobilise private finance for CCD. The first aim of this methodology is to fill these key information gaps about incentives and investment at country level in climate-relevant sectors, in order to support governments in their efforts to shift or direct additional private resources to CCD. The second is to enhance understanding of the links between public support (both domestic and international) through regulatory, economic, and information instruments, and through private investment in CCD.