51 The triple win NbS is characterised by the wide range of benefits it can generate for local communities via poverty reduction, climate change mitigation or adaptation, and biodiversity. The economic case for considering ecosystem services in project and policy appraisal has been raised in numerous studies over the previous two decades and generally investing in nature is discussed as a cost-effective intervention. These benefits are often qualitative in nature and difficult to quantify and compare across projects. This can make standard evaluation techniques such as cost-effectiveness or cost-benefit analyses challenging. Despite the economic case for nature, there is a significant funding gap for biodiversity and conservation projects. Given the importance of public funds for NbS, it is important to understand what barriers are stopping private finance from investment in NbS. This chapter looks at the current evidence base for the economic case for investment in nature and NbS and discuss key barriers to and solutions for increasing private investment in NbS projects. Economics and Finance Economics and Finance Economics and Finance