Millions of households could be overpaying their energy bills, a new calculator has revealed.

The average energy bill for a dual-fuel home paying by direct debit increased from £1,738-a-year to £1,849 from April 1 after a 6.4 per cent increase in Ofgem's energy price cap.

But it is set to decrease by seven per cent on July 1, meaning the UK's 35 million households on a variable tariff will see their monthly gas and electricity payments fall.

A typical household will see their annual bill fall from £1,849 to £1,720 from next month.

This is £660 (28 per cent) lower than at the height of the energy crisis at the start of 2023 when the Government implemented the energy price guarantee.