In 2015, ICLEI launched the Transformative Actions Program (TAP) with a simple but bold purpose: To help subnational governments turn their sustainable development ideas into investment-ready projects. Ten years later, that vision has consolidated into a global platform that has received over 500 applications, connected dozens of local initiatives to technical assistance and financiers, and helped mobilize €1.9 billion-worth in transformative ideas

As TAP celebrates its 10th anniversary in 2025, its impact continues to grow, alongside the need for sustainable development in cities and regions worldwide.