SSE customers will see an average 8.2 per cent rise in gas and electricity prices from 15 November, the BBC has reported.
The energy firm said the rise reflected higher costs of buying wholesale energy and paying to deliver it to customers’ homes, plus government levies.
The price rises will affect about 4.4 million electricity customers and 2.9 million gas customers, not including those on fixed-price tariffs.
SSE’s average annual standard dual-fuel energy bill will rise to £1,224.
The company said that 8.2 per cent was an average rise. Customers in the North of England and central Scotland would see the smallest increase, of 7 per cent, in their dual fuel price. Customers in the South East of England would see the biggest, up 9.7 per cent.
SSE last increased its prices a year ago. It has now pledged not to raise them again before autumn 2014.
The announcement comes about a year after the last set of gas and electricity price rises.
Between October and December 2012, the “big six” energy companies outlined price rises of between 6 per cent and 10.8 per cent.