The fifth edition of The State Energy Efficiency Index (SEEI), initiated by Bureau of Energy Efficiency (BEE), in association with Alliance for an Energy Efficient Economy (AEEE), to evaluate the annual progress of energy efficiency implementation in the states. The State Energy Efficiency Index (SEEI) identifies and addresses gaps concerning state-level energy efficiency policies, programmes, and investments. This assumes importance given that Energy efficiency (EE) is the cheapest, fastest and cleanest solution to complement renewable energy in addressing climate change and achieving energy security. The SEEI 2023 assesses the performance of 36 states and UTs using 65 qualitative, quantitative, and outcome-based indicators measures. distributed across seven (7) demand sectors: buildings, industry, municipal services, transport, agriculture, electricity distribution companies (DISCOMs), and cross-sector initiatives.