The Western Indian Ocean (WIO) is critical in supporting the social and economic development of the nations it borders. To safeguard the various opportunities it provides, it is essential to adopt sustainable ocean development models that balance ocean wealth and ocean health. This publication provides practical guidelines to start implementing national, regional or local ocean accounts, following the Technical Guidance on Ocean Accounting. It is further complemented by amendments proposed by the African Community of Practice based on lessons learned during the implementation of ocean accounts pilots across the WIO region.