Energy giant EDF is to increase its dual fuel tariff by 7.2% from June, gas prices by 5.5% and electricity by 9%, affecting 1.5 million customers.
The company, which has 3.3 million customers, said the industry was facing “significant” cost reductions.
EDF announced a 1.2% increase in dual fuel tariffs in December, saying the combined effect of both changes is 8.5%.
The company also launched a new three-year fixed deal, including a year’s free boiler insurance.
It is the second time this year that prices will increase.