Consumers face 17 more years of above-inflation increases in energy and water bills as they help pay for the renewal of the UK’s infrastructure, Whitehall’s spending watchdog has warned.
The National Audit Office added that “gaps” in the official analysis meant government lacked “an overall picture of affordability”.
It expressed particular concern about low-income households.
But the government said it was “committed” to keeping bills down.
Fuel costs have become a highly charged political issue in recent months.
Five of the UK’s six main energy companies have announced price rises, at an average of 8.1%.
On Tuesday, EDF Energy became the latest provider to increase bills, by an average of 3.9%.