Three million were still waiting for a £150 energy bill payment months into the scheme, according to a new report.
While the vast majority who pay council tax by direct debit had received the money by 1 July, around half who pay by other ways had not, the BBC reported.
The government launched the scheme in April and told councils to make the payments “as soon as possible”. All should be paid by the end of September, it said.
It comes as household prepare to see bills rocket once again when a new energy price cap - which sets the maximum amount customers on standard tariffs can be charged - is set on Friday.
Experts are forecasting another huge rise in energy bills from £1,971 to potentially as much as £3,600 per year as global gas prices continue to soar.
In other news, a think-tank has etimated the government would have to pay more than £110bn to cover nearly all of Britons’ extra energy costs over the next year.