Prime Minister Sir Keir Starmer has said "the sooner" his government provides clarity on changes to the winter fuel payment "the better".
Speaking to the BBC's Today programme, he reiterated that ministers were reviewing which pensioners should receive the payment but added he wanted to be "absolutely clear where the money is coming from" before setting out the details.
After coming to power in July last year, the Labour government announced it was withdrawing the annual payment – worth up to £300 – from more than 10 million pensioners.
However, last month Sir Keir said he would be partially reversing that decision, making changes to allow "more pensioners" to qualify again.
The government is yet to spell out which pensioners will regain their entitlement to the money, although Treasury Minister Darren Jones has said millionaires should not be getting "subsidy for their energy bills" and that payments would be "targeted to those that need it the most".
An announcement could come at the Budget in the autumn or even as early as next week when Chancellor Rachel Reeves delivers her Spending Review.
