They only made £571 million profit.
British Gas is expected to unveil record profits later. The Centrica-owned provider is expected to reveal that 2007 profits from its residential division were substantially higher than in 2006.
British Gas, the UK's biggest power provider, last month said it would raise the amount it charges for gas and electricity by 15%.
The announcement followed increases from rivals Npower and EDF Energy, who blamed wholesale costs.
British Gas has said that it would make a loss this year without the price rise.
Consumer groups and the Unite trade union have criticised the move, saying it would make life harder for firms, the elderly and those on low incomes.
Centrica is expected to announce a profit for the group of around £2bn, but will argue only a small proportion of that comes from supplying householders with gas and electricity.
British Gas is expected to unveil record profits later. The Centrica-owned provider is expected to reveal that 2007 profits from its residential division were substantially higher than in 2006.
British Gas, the UK's biggest power provider, last month said it would raise the amount it charges for gas and electricity by 15%.
The announcement followed increases from rivals Npower and EDF Energy, who blamed wholesale costs.
British Gas has said that it would make a loss this year without the price rise.
Consumer groups and the Unite trade union have criticised the move, saying it would make life harder for firms, the elderly and those on low incomes.
Centrica is expected to announce a profit for the group of around £2bn, but will argue only a small proportion of that comes from supplying householders with gas and electricity.