Eir Starmer will call on Monday to freeze the energy price ceiling at its current level of £1,971 as UK households face rising energy bills.
Sir Keir will step in after Cornwall Insight predicted the price cap would rise by £3,582 in October, before rising again to £4,266.
A think tank has warned that low-income households will have to reduce their purchasing power by three times as much as high-income households to pay their energy bills this winter.
Labor leader Sir Keir Starmer will argue for the price cap freeze while indicating how his party will pay for the measure, according to The Observer.
Specific information on the measure was not available, although Sir Keir wrote elsewhere that the party sought to end the “injustice” in the energy field.
“We would end the injustice that sees people paying for their energy on prepayment meters,” he wrote in The Sunday Mirror.
“And we will map out in the coming days how we are going to help people directly this winter.”
It comes after Sir Keir said on Friday it was “nonsense” to claim his party has not taken the lead in the cost of living crisis, despite Gordon Brown claiming crises “don’t take holidays” after the Labor leader and Boris Johnson both spent time outside the UK in recent weeks.
Separately, UK charities and organizations have called on Liz Truss and Rishi Sunak to address the “cost of living crisis”.
They said: “So far this year, nearly three-quarters of low-income households receiving universal credits or other means-tested benefits, many of them working families, have been forced to go without at least one essential. This means that people have to skip meals or cannot heat their homes properly.
“Many of our organizations work directly with these families and become overwhelmed, too often unable to provide much needed support.
“This situation must not continue. As future leaders of this country, we urge you to act now to show the compassion and leadership needed to address this issue immediately.”