This Policy Perspectives places Research Collaborative findings to date both on approaches to estimating mobilisation and on the availability of underlying private climate finance data within an overarching framework. This framework outlines key decision points involved in estimating publicly mobilised private finance and assesses a range of methodological options to address these. Future work related to the Research Collaborative intends to further develop and test estimation methods within the context of pilot measurements for climate-relevant sectors, in terms of different types of interventions/instruments, as well as at the levels of individual/ groups of countries and public finance institutions.