This guidebook addresses the financing gap by focusing on how urban NbS can be made more investable and scalable in Indian cities. It presents a structured, three-step guidance framework to support stakeholders in (i) assessing policy and regulatory frameworks relevant to NbS, (ii) identifying and deploying appropriate financial and business mechanisms, and (iii) evaluating projects to strengthen bankability and financing readiness. The framework is complemented by a curated repository of nine global and Indian NbS case studies.