This report reviews existing research to understand the social impact of sport in development projects. It highlights sport's benefits for achieving Sustainable Development Goals (SDGs) and emphasizes the need for robust indicators. The report covers sport's impact on social cohesion, gender equality, education, urban development, and health. Additionally, it explores how social impact bonds can enhance public authority involvement in sport-for-development initiatives. The goal is to foster dialogue among stakeholders and develop a common framework of sport-for-development indicators.