The System of Environmental-Economic Accounting (SEEA) is an international benchmark series initiated in 1993 to integrate economic and environmental information within a unified statistical framework. Developed under the auspices of the United Nations and partner institutions, it provides a consistent approach for measuring the relationship between the economy and the environment.

The series sets out internationally agreed concepts, definitions and classifications that enable countries to compile comparable accounts on environmental assets, resource use and the impacts of economic activity. It aligns closely with the System of National Accounts to ensure coherence between economic and environmental data, supporting evidence-based policy and investment decisions.

Its methodology combines physical and monetary accounting to capture stocks and flows of natural resources, ecosystem services and related transactions. This allows finance professionals to interpret environmental dependencies, assess sustainability risks, and incorporate natural capital into economic analysis, reporting and valuation frameworks.

Through its structured framework, the SEEA assists governments, investors and analysts in understanding how environmental changes influence economic performance and asset values, promoting more integrated and transparent decision-making across the public and private sectors.