and Viet Nam. Four of these economies are OECD members (Australia, Korea, Japan and New Zealand). The approach used in Revenue Statistics in Asia and the Pacific is based on the well-established methodology of the OECD Revenue Statistics (OECD, 2020), which has become an essential reference source for OECD member countries. Comparisons are also made with the averages for OECD economies, Latin American and Caribbean (LAC) countries and 30 African countries.In this publication, the term "taxes" is confined to compulsory, unrequited payments to general government. As outlined in the Interpretative Guide to the Revenue Statistics, taxes are "unrequited" in the sense that benefits provided by government to taxpayers are not normally in proportion to their payments. The OECD methodology classifies a tax according to its base: income, profits and capital gains (classified under heading 1000), payroll (heading 3000), property (heading 4000), goods and services (heading 5000) and other taxes (heading 6000). Compulsory social security contributions paid to general government are treated as taxes, and are classified under heading 2000. Greater detail on the tax concept, the classification of taxes and the accrual basis of reporting is set out in the Interpretative Guide in Annex A.