CESC generates and distributes electricity, supplying domestic, industrial, commercial and other users in its licensed areas. Power generation and distribution constitute 100% of its turnover.

Its core licensed area is Kolkata, Howrah, Hooghly, North and South 24 Parganas (West Bengal), with distribution ventures in Greater Noida (Uttar Pradesh), Kota, Bharatpur and Bikaner (Rajasthan), Malegaon (Maharashtra) and Chandigarh (Union Territory).

As on March 31, 2025, the Company had 42 subsidiaries; three of them are material subsidiaries: Noida Power Company Limited, Haldia Energy Limited and Dhariwal Infrastructure Limited .