This paper examines three sets of issues related to strategic investment planning and financing for water: i) Investment planning in an uncertain context; ii) The benefits of supplementing project level planning with a consideration for pathways of investments; iii) Facilitating access to a wider range of financing sources, most importantly commercial finance. Together these issues can enhance the performance of water-related finance, making the best use of available finance and assets, in a context marked by high-level of (public and private) debt and rising cost of finance. This is the first in a sub-set of four working papers within the Environment Working Paper series destined to support the further implementation of the economic pillar of the Water Framework Directive. The four papers are best read in combination and provide lessons which are relevant beyond the European Union.