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SSE has become the last of the "big six" energy companies to announce early summer price rises, with a 6.7% average increase in gas and electricity bills.
The move will see gas prices rise by 5.7% and electricity prices go up by 7.7% on 11 July for SSE customers on variable deals.
This will mean an average £76 per year rise for 2.36 million customers.
The company said the price rise was the result of increasing costs "largely outside our control".
"We deeply regret having to raise prices and have worked hard to withstand the increasing costs," said Stephen Forbes, chief commercial officer at the company.
"The cost of supplying energy is increasing and this ultimately impacts the prices we are able to offer customers."
Full set
All the major domestic energy suppliers have announced some form of price rise in recent weeks.
Some 4.1 million British Gas customers faced a 5.5% hike as of Tuesday, adding an average of £60 to bills. The move was branded as "unjustified" by the government when it was announced.
Scottish Power is increasing prices by 5.5%, or £63 on average, for nearly one million people from 1 June.
EDF has a 2.7%, or £16, electricity price rise coming into effect on 7 June for 1.2 million customers.
Npower's 5.3% increase, an average of £64, will hit one million people from 17 June.
E.On has made changes to how it bills customers which took effect in April. They will amount to a rise in the average standard variable rate of £22.
Merger plans
Last week, SSEwhich is planning to merge its retail arm with rival Npowerannounced that it profits fell last year as it lost 430,000 customers.
SSE pointed to competitive pressures as the number of domestic energy accounts fell from 7.23 million to 6.8 million.
"With the company announcing last week that it lost 430,000 customers in the past year, it is clear that people are realising that many tariffs offered by these energy giants are fundamentally bad value," said Peter Earl, from price comparison website comparethemarket.com, which makes it money from consumers switching.