E.Ons Chief Executive, Tony Cocker, said on Wednesday the energy supplier could not guarantee it would not raise prices in the UK this year following a hike in January.
The company was the last of the big six energy giants to increase its tariffs at the start of the year and has been fighting claims of over-charging customers ever since.
E.On had blamed higher wholesale prices and greater investment commitments for higher bills.
Subscribe to MoneyWeek
Subscribe to MoneyWeek today and get your first six magazine issues absolutely FREE
Sign up to Money Morning
Don't miss the latest investment and personal finances news, market analysis, plus money-saving tips with our free twice-daily newsletter
Don't miss the latest investment and personal finances news, market analysis, plus money-saving tips with our free twice-daily newsletter
Cocker told the BBC's Radio 4 Today programme: "We can't guarantee we won't have to raise prices again this year."
His statement came after the company reported a 17% fall in 2012 profits to £235m.
Profit margin electricity and gas to domestic customers in the UK was estimated at 2.3%, or just under £27 on an average weighted dual fuel residential bill.
The company's sales revenues rose 5.0% to £132.1bn.
RD
-
Cash in on the growth prospects of Europe's companiesOpinion Marcel Stötzel, co-portfolio manager of the Fidelity European Trust, selects three stocks
-
Is the AI boom another dotcom bubble?25 years on from the dotcom bubble bursting, is it time for investors to consider the sustainability of the AI boom in the stock market?
