The main aim of this report is to set out a basic analytical framework for assessing resource mobilization for biodiversity conservation. A second goal is to ‘populate’ this framework using readily available data on spending on biodiversity conservation, including public and private expenditure on both domestic and international activities. This report considers several sources of support for biodiversity conservation. The focus is on direct funding, for which data are more readily available, notably domestic government expenditures as well as public grants, loans and guarantees to international agencies and to foreign governments. Additionally, the report considers private direct expenditures, including voluntary donations by households and companies, as well as the costs of complying with environmental regulations.