Sustainable urban finance is a critical component in developing mass rapid transit systems in urban areas. This paper presents an overview of sustainable urban finance and its role in supporting mass rapid transit development. It explores the different sources of financing available for transit development, including public and private sector funding, as well as innovative financing mechanisms such as green bonds, transit-oriented development, and public-private partnerships. The paper also examines the benefits of sustainable urban finance, including improved environmental and social outcomes, increased economic development, and reduced financial risk. Finally, the paper discusses key challenges in implementing sustainable urban finance strategies for mass rapid transit development, such as political and regulatory barriers, lack of public awareness and support, and the need for coordinated planning and financing across different levels of government and stakeholders. Overall, the paper highlights the importance of sustainable urban finance as a key tool for achieving sustainable and equitable urban development through mass rapid transit systems.