Funding to support developing countries take action on climate change is projected to increase dramatically in the coming years. However, this increase in opportunities is being matched by an equally dramatic increase in complexity. This range of sources, each with their own set of rules and regulations, is often difficult to navigate, confusing and requires significant investment of a country’s limited resources to access and manage. The purpose of this national climate change finance assessment (the Nauru Case Study) is to assist the Government of Nauru (GoN) make informed decisions on measures to improve access to and management of climate change resources. It has been undertaken in response to a request from the GoN, following recent decisions made by Leaders and Economic Ministers on climate change financing.