EDF Energy is to increase prices for gas and electricity residential customers by 10.8% from December 7.
The company price rises, due to affect three million households, will mean the typical dual-fuel bill for a direct debit customer will rise by £122 to £1,251 a year.
EDF, which is the fifth major supplier in recent weeks to announce higher prices, with E.ON the only big supplier yet to announce rises after it made a promise not to raise tariffs this year.
EDF, which has 3.1 million customers and 5.5 million accounts overall, said its annual dual fuel bill was the lowest of the suppliers to have announced price rises so far.
Companies have blamed the changes on rising wholesale prices and increased running costs, especially for transporting gas and electricity to customers' homes, and the cost of energy efficiency programmes.
EDF director Martin Lawrence said: "We know that customers will not welcome this news and do not want to see prices going up.
"Our new prices will however be cheaper on average than those of all the other major suppliers which have announced standard price rises so far this autumn."
He added the company was taking steps to help vulnerable customers by ensuring that those whom the Government identifies as most in need will automatically benefit from a discount equivalent to being on its cheapest tariff.