This decision-making tree, with a specific focus on biodiversity, aims to support project developers to navigate among the numerous financing instruments available, and help them to find the most suitable ones, taking into consideration their local and national environment, as well as ability to access international financing sources. The tree should be used together with the Guide to Biodiversity Financing for Cities and Regions, which contains a description of each of these financing tools, illustrated by case studies. Please also note that this tree serves to support decision making, and that multiple financing solutions for a single project can exist, with projects often being financed by a mix of sources and instruments.