India, the world’s fourth-largest greenhouse gas emitter, has pledged to reduce its emissions intensity per unit gross domestic product (GDP) by 33 to 35 percent below 2005 levels by 2030 through its Nationally Determined Contribution (NDC). The Energy Policy Simulator, a System Dynamics computer model, can estimate the impacts of various policy packages and offer objective, quantitative analysis to help India develop smart packages of policies that can work in concert to deliver India’s climate goals. India’s Energy Policy Simulator was developed by Energy Innovation LLC and World Resources Institute. This technical note describes the structure, the input data sources, and the limitations and assumptions of the EPS-India.