Ponds and pondscapes (a complex of multiple ponds) are Nature-based Solutions (NbS) that can address numerous societal challenges, including the need for climate adaptation, biodiversity enhancement, and water management. Financing has been identified as a key barrier that limits the upscaling of NbS, including pondscapes. This report aims to address this challenge by supporting pondscape developers to answer a simple question: how can I pay for my pondscape project?This report introduces the PONDERFUL Sustainable Finance Inventory, which consists of a total of 24 financing instruments for nature-based solutions, each matched by at least one concrete example of the financing instrument in action. The Inventory aims to support pondscape developers understand financing options and identify the finance instruments best suited to their pondscape NbS project. Alongside this report’s evaluation of the NbS financing literature, the PONDERFUL Sustainable Finance Inventory supports ongoing practical work and testing in the eight PONDERFUL DEMO-sites.