The Rajasthan Electricity Regulatory Commission commissioned Prayas (Energy Group) to design Time of Day (ToD) tariffs for the state's three distribution companies. The study analyzed five years of 15-minute block-wise demand-supply patterns. The average and marginal costs were estimated across different time blocks to assess variations in DISCOM costs with changing demand and supply patterns. Drawing from these trends and ToD practices across other states, the study proposes a forward-looking framework with a clear trajectory until FY2029-30, enabling consumers and DISCOMs to optimize their operations and investments. Key recommendations include a simplified two-season ToD structure with enhanced solar hour rebates to reflect Rajasthan's growing renewable energy capacity. The framework recommends phasing out night and early morning rebates in response to the state's evolving demand patterns. The study proposes universal implementation of ToD tariffs through a phased approach, aligned with the existing metering infrastructure and planned improvements.