Millions of British Gas customers are set to see their bills increase, after the energy company announced it is raising the cost of its standard variable tariff (SVT) by 3.8% from the beginning of October.
However, British Gas is not the only energy company to have announced price rises, with many others also hiking their prices in recent months.
The increase to British Gas customers' SVT, which was withdrawn for all new customers on March 31, means the average bill for existing dual fuel households will rise by £44 to £1,205.
The increase is the second for British Gas customers this year, after the company announced in April that it was increasing its prices by an average of 5.5% - adding around £104 to bills - from May 29 for both its SVT and its new Temporary Tariff fixed-rate deal, which replaced the standard tariff at the end of March.
British Gas said it was increasing its prices again following a 20% rise in the costs of buying wholesale energy since April.
Wednesday's announcement follows similar recent rises from other suppliers affecting millions of households.
E.ON, SSE, Npower, EDF, ScottishPower and Bulb have all hiked energy prices, blaming wholesale energy costs for the increases.
Energy regulator Ofgem has also announced that its safeguard tariff, which protects five million households from overcharging, will rise by £47 per year in October to £1,136.
But the regulator, along with consumer groups and politicians, urge energy customers who are not happy with their tariff to switch supplier, or at least the deal they on, saying they could potentially save almost £400 a year.
Rik Smith, uSwitch.com energy spokesman, said: “The only silver lining is that households are switching and saving in greater numbers than ever before.
“So far this year 2.7 million people have voted with their feet and ditched their supplier. Switching is quick, easy and could save households up to £482 a year – far more than any cap has predicted.”