MAIA (Mapping and Assessment for Integrated ecosystem Accounting) aims to mainstream natural capital and ecosystem accounting (NCA) in EU member states. MAIA uses the System of Environmental Economic Accounting – Experimental Ecosystem Accounting (SEEA-EEA) as the methodological basis for NCA. The SEEA EEA provides a consistent framework for analysing and storing information on ecosystem assets and flows of ecosystem services, in both physical and monetary units. The SEEA EEA follows a spatial approach, requiring extensive (spatial) data and models as inputs into the accounts.In MAIA, a flexible approach will be followed, allowing for adaptation of the SEEA EEA framework to the conditions of individual EU countries. In particular, MAIA will: (i) assess policy priorities for accounting; (ii) test, pilot and mainstream NCA in 10 countries; (iii) test innovative approaches for NCA in the European context; and (iv) support NCA in the EU through various communication and dissemination activities including the development of guidelines, a web-based information system and other facilitating actions. MAIA will involve in-country work in Belgium, Bulgaria, Czech Republic, Finland, France, Germany, Greece, the Netherlands, Norway and Spain but there will be outreach to all EU member states through exchanging data, guidelines and experiences. The MAIA consortium includes a balanced mix of partners with backgrounds in statistics, ecological modelling and environmental economics, including three statistical agencies. In addition, MAIA has 18 supporting partners including statistical and other government agencies in 10 countries. Institutes with more experience will mentor and assist those with less experience. MAIA partners are involved in a range of other initiatives such as the SEEA London Group, MAES, ESMERALDA and IPBES, and includes partners supporting KIP INCA, which will facilitate exchanging experiences. Overall coordination of MAIA is with Wageningen University.