Energy bills are predicted to fall by 15 percent a year from April. : The average home currently pays £1,928 a year for gas and electricity bills, however, customers can expect lower energy costs for the rest of 2024. Energy bills are projected to fall by an average of 15 percent - equivalent to £293 in annual savings. Cornwall Insight has released its final forecast for the April – June default tariff cap (price cap). If the price cap does fall, it would be the lowest Britons have seen their energy bills in two years.