This report aims at strengthening the case for investment and provides a collection of financing options for different types of urban NbS1. It has been developed as a motivational effort to engage city officials, practitioners, and private sector actors in the co-creation of innovative and sustainable NbS business models for their cities. It presents the state and specificities of the market for NbS in cities (section 1) and uses as very concrete entry points some well recognised NbS types to illustrate and inspire a collection of possible financing options for NbS in cities (section 2). It builds on the high political momentum for mainstreaming NbS in cities and provides recommendations to unlock the financial flows necessary for scale up (section 3).