This document introduces economic and financial instruments for integrated water resources management (IWRM). It defines economics as allocating scarce resources, and finance as maximizing returns on assets/investments. Economic instruments for IWRM include water tariffs, abstraction charges, subsidies, and taxes. Financial instruments include water tariffs, government grants/loans, external grants/loans, and commercial loans. Implementing IWRM faces roadblocks like sectoral interests and socio-cultural myths. An incremental approach is needed to negotiate differences, integrate sectors, and reform institutions and laws to sustainably finance IWRM plans.