India’s Renewable Consumption Obligation replaced the RPO regime in 2024, creating binding RE consumption targets for all designated consumers — including aluminium smelters, steel mills, fertiliser plants, cement companies, and railways operating captive power plants or open access arrangements. The target trajectory runs from 29.91% of total electricity consumption in FY2024-25 to 43.33% by FY2029-30. Three compliance pathways exist: direct RE consumption, REC purchase, or buyout at CERC-determined price. CERC revised the buyout price upward to Rs 347/MWh for FY2024-25 after stakeholder consultation. For an aluminium smelter consuming 3,000 MU per year from coal CPP, the RCO shortfall in FY2024-25 represents 897 MU of RE that must be sourced — a REC compliance cost of approximately Rs 305 crore per year if met entirely through REC purchase. The same obligation cost only Rs 134 crore per year through incremental open-access captive solar procurement — and the same solar investment simultaneously generates CCTS Scope 2 GEI reduction, CBAM Scope 2 certificate savings, and RCO compliance credit. This article maps the full RCO compliance arithmetic, explains how RCO interacts with CCTS and CBAM, and builds the comparison between the three compliance routes for a typical heavy industrial consumer.