Project finance transactions involve a complex web of parties, each playing a critical role in the success or failure of the project. Understanding the roles and responsibilities of these key players is essential for anyone involved in project development and funding. **Sponsor(s):** The sponsors, or project companies, are the driving force behind the project. They are typically private companies or government entities that conceive, develop, and manage the project. Sponsors provide equity capital, undertake feasibility studies, secure permits and licenses, and negotiate key contracts. They bear the ultimate responsibility for the project’s success and are also the primary beneficiaries of its revenues. The sponsor’s reputation, experience, and financial strength are critical factors for lenders assessing project risk. **Lenders:** Lenders provide the debt financing for the project, typically in the form of loans. These lenders are often commercial banks, institutional investors (such as pension funds and insurance companies), and multilateral development banks (MDBs). Lenders conduct rigorous due diligence to assess the project’s technical, economic, and environmental viability. They carefully analyze the project’s cash flow projections, security arrangements, and contractual framework to ensure the debt can be repaid. Lenders protect their interests through loan agreements that contain various covenants, restrictions, and security interests. **Off-taker(s):** The off-taker(s) are the entities that agree to purchase the project’s output, such as electricity, water, or manufactured goods. The off-take agreement is a crucial contract in project finance, as it provides a predictable revenue stream that supports debt repayment. The creditworthiness and long-term commitment of the off-taker are vital to the project’s financial viability. **Construction Contractor(s):** The construction contractor(s) are responsible for building the project infrastructure. They are typically engineering, procurement, and construction (EPC) firms with expertise in the relevant industry. The EPC contract is a fixed-price, turnkey contract that outlines the contractor’s obligations, timelines, and performance guarantees. **Operator(s):** The operator(s) are responsible for the day-to-day operation and maintenance of the project once it is completed. They ensure the project operates efficiently and safely, and that it meets its performance targets. The operator’s experience and expertise are critical for maximizing project revenues and minimizing operating costs. **Government Authorities:** Government authorities play a significant role in project finance, particularly for infrastructure projects. They are responsible for granting permits and licenses, providing regulatory oversight, and potentially offering subsidies or guarantees. The government’s support and commitment are essential for the project’s success. **Advisors:** A range of advisors provide specialized expertise throughout the project development and financing process. These include financial advisors, legal advisors, technical advisors, and environmental consultants. They assist the sponsors, lenders, and other parties in assessing risks, structuring the financing, and negotiating contracts. **Insurers:** Insurers provide coverage for various project risks, such as construction delays, political risks, and natural disasters. Insurance policies help to mitigate these risks and make the project more attractive to lenders. Each of these parties has a unique role and perspective in the project finance transaction. Successful project finance requires effective communication, collaboration, and alignment of interests among all the key players.