Bihar State Power Holding Company Limited (BSPHCL), formerly Bihar State Electricity Board (BSEB) is a state-owned electricity regulation board operating within the state of Bihar in India. BSEB was established in 1958 as a statutory corporation under the Electricity (Supply) Act, 1948. As of November 2012, BSEB has nearly 1,700 officers and 14,850 employees. The derated capacity comes to just 530 MW. The BSEB was unbundled on 2 August 2011. Power Finance Corporation was the main consultant for BSEB's restructuring.
 BSEB formally started functioning as 5 companies on 1 November 2012, namely:
 The installed electricity generation capacity in Bihar was 6384.88 MW as of April 2020.
There are newer projects under construction which will take total electricity generation capacity in Bihar to more than 12000 MW.
 On 17 April 2018, Bihar state cabinet, headed by chief minister Nitish Kumar, gave its nod to handing over of Barauni Thermal Power Station, Kanti Thermal Power Station and Nabinagar Super Thermal Power Project to National Thermal Power Corporation.
 The current installed capacity of this power plant is 470 MW and in future the plant will have a total capacity of 720 MW with projects of 250 MW under construction.
 Unit No. 1, 2 & 3 of 15 MW each and Unit No. 4 & 5 of 50 MW each are retired as they are very old to be maintained and are retired.
 Unit 6 and 7 of 110 MW each were renovated by BHEL which also originally supplied equipments and are now operational.
 New Unit 8 of 250 MW was inaugurated in January 2018. Unit 9 of 250 MW is under construction and expected to be operational by 2020.
 There is another ongoing plan for new capacity addition of 500 MW (2x250 MW) to this plant. In March 2013, Central Government assured to provide coal linkage to Barauni Thermal Power Plant.
 The current installed capacity of this power plant is 1320 MW and in future the plant will have a total capacity of 3300 MW with projects of 1980 MW under construction.
 The project comprises two stages. The EPC contractor for State-1 of 1,980MW (3x660 MW) is Russian firm TPE, and for Stage-2 of 1,320MW (2x660 MW) is BHEL. Stage-1 being built with equipment from TPE is delayed as TPE is asking for more money. In November 2013, 660 MW unit 4 of Stage-2 being built by BHEL got synchronised with the grid. Commercial operation started in November 2014 after resolving faults. Unit 5 of Stage-2 is also now operational.
 This is an upcoming power plant with a planned capacity of 1320 MW. Larsen & Toubro Limited holds the contract for the construction, at an estimated cost of Rs 7,490 crores. It is scheduled to open in 2023.
 The current installed capacity of this power plant is 2340 MW and it is located in Kahalgaon, Bhagalpur, Bihar.
 The current installed capacity of this power plant is 610 MW
 Units 1 & 2 of 110 MW, originally commissioned in 1985–86, went down in 2002–2003 and were renovated by Bharat Heavy Electricals who originally supplied equipment to these two units.
 Units 3 & 4 are of 195 MW each. The plant is also known as George Fernandes Thermal Power Plant Station.
 The current installed capacity of this power plant is 660 MW and in future the plant will have a total capacity of 4380 MW with projects of 3720 MW under construction.
 Nabinagar Power Generation Company Ltd (NPGCL), a 50:50 joint venture of NTPC Ltd and BSEB, is setting up the 4,380 MW (660 MW X 3), which will start generating electricity from December 2017. The project's generation capacity initially was to be 3960 MW but in 2016, the production capacity was increased to 4380 MW. Nabinagar Supercritical Thermal Power Project (STPP) in Nabinagar, Aurangabad, Bihar. BHEL won a ₹ 2,854-crore contract for supply of the steam generator package for three coal-fired thermal units of 660 MW each with supercritical parameters. TRF Ltd, a Tata Group company, has won a ₹ 360.47-crore order from Nabinagar Power Generating Company Pvt. Ltd for designing, engineering, manufacturing, supplying, erecting, testing and commissioning of a coal handling plant for a 3 x 660MW coal-based super thermal power project coming up at Nabinagar. The coal handling plant will be designed to run at a capacity of 3,630 tonne per hour. In March 2013, Alstom was awarded a contract worth approximately $115 million by BHEL, to supply components for three units of 660 MW supercritical boilers of NPGCL. Alstom India will supply transformers for NTPC's Supercritical Nabinagar Power Project, by winning a Rs 105 crore order that covers design, engineering, manufacture, supply, testing, erection and commissioning of generator transformers and associated power transformers and shunt reactor. The Nabingar power transformer package is due to be delivered by October 2017.
 The current installed capacity of this power plant is 750 MW and in future the plant will have a total capacity of 1000 MW with projects of 250 MW under construction.
 Koshi Hydel Power Station which has an installed capacity of 19.2 MW (4x4.8) has been handed over to Bihar State Hydel Power Corporation on 11 November 2003.
 Bihar Grid Company Limited (BGCL) is a joint venture of Bihar State Power Holding Company Limited (BSPHCL) and Power Grid Corporation to expand and strengthen electricity transmission in Bihar.
 There are 45 power sub-stations. The eight grids supply around 500MW of power to the state capital.
 There are six grid substations in North Bihar.
 Upcoming Bihar thermal power plants:
 The Government of India has decided to reduce the capacity of the proposed nuclear power plant at Rajauli, Nawada by half.[citation needed]
 Karbigahia Thermal Power Station will be developed as the first-ever 'energy park' in Bihar.
 In September 2012, 43 projects of rural electrification have been sanctioned for Bihar under Rajiv Gandhi Gramin Vidyutikaran Yojana.[citation needed]