This publication analyzes key opportunities and challenges related to the financing of transboundary water cooperation and basin development. Investigating different financial needs for the development and maintenance of joint bodies and the development and implementation of basin management and development projects, it contrasts those needs against potential sources of funding and financing from both public and private entities. It provides a comprehensive overview and typology of sources of funding and financing potentially available for those involved in the management and development of transboundary basins, while also providing a sound understanding of related opportunities and challenges. Ultimately, this publication encourages dialogue between basin managers and developers on the one hand and representatives of the financial sector - both public and private - on the other.