Why Your Energy Bill Is Going Up Again — and Why Millions of Families Owe Money

Households across Great Britain could owe energy suppliers as much as £7bn by the end of 2026, according to Energy UK, a group that represents energy companies. The warning comes as the energy price cap is expected to rise to its highest level in three years this October (The Guardian).

The price cap is a limit set by Ofgem, Britain's energy regulator, on how much suppliers can charge per unit of gas and electricity. It is reviewed every few months. Domestic energy debt and arrears climbed by roughly £500m over the past year to a record £6bn at the end of June. Energy UK, whose chief executive is Dhara Vyas, estimated that debt left unpaid for longer than 30 days would reach £7bn by year-end. The trade association's figures run about £1bn higher than Ofgem's official count, which records unpaid bills only once they reach 90 days overdue.

The problem has been growing for a while. In February 2026, Energy UK issued a press release titled "Energy UK raises alarm over £5.5 billion energy debt crisis," reporting total household energy debt at £5.5bn and warning that without urgent intervention the figure could exceed £7bn by year-end, adding a further £10 to £15 to annual energy bills (Energy UK). A companion publication, "Energy debt: Everyone pays," placed the total at nearly £4.5bn at the time and projected the same £7bn year-end figure (Energy UK). Britain's household energy debts have risen 118% since 2021, in the aftermath of Russia's invasion of Ukraine, according to Ofgem (The Independent).

Cornwall Insight, a consultancy that forecasts energy prices, predicts that over the final three months of 2026 the typical household will face a gas and electricity bill equivalent to £1,729 a year. Using the previous price cap methodology, the consultancy projects the cap rising to £1,940.69 from October, the highest level since the summer of 2023. The expected 4% increase in October follows small step-by-step changes to unit rates: electricity rates rising from 26.11p to 26.57p per kilowatt hour and gas charges from 7.33p to 7.90p for households that pay by direct debit.

Energy UK identified the cost of buying gas from the global wholesale market as the single largest reason for the expected cap rise, with the expense of upgrading Great Britain's energy networks also playing a larger role than in previous rounds.

The price cap increase would more than wipe out the impact of the prime minister's pledge to cut VAT — a tax added to the price of most goods and services — from household electricity bills from October, a measure designed to reduce average bills by about £45 a year. Energy UK urged Andy Burnham's government to consider what it called a "targeted and more permanent" solution to rising bills, including a social discount tariff, which would mean lower rates for households that need the most help.

Energy UK has scheduled an event titled "Next steps for household energy affordability and debt" for 27 August 2026 (Energy UK).

The broader context here is one of debt piling up on top of a seasonal price shock. The £6bn arrears figure as of June already reflects a summer period when heating demand is at its lowest. The October cap increase arrives precisely as consumption rises, which means the debt trajectory Energy UK projects would likely steepen through the winter months rather than grow at a steady pace. The gap between Energy UK's 30-day overdue threshold and Ofgem's 90-day measure is not merely a difference in counting rules: the £1bn gap between the two figures points to a large volume of debt that is recent, growing, and not yet captured in the regulator's formal accounting. Whether those bills are ultimately recovered or written off, suppliers recover the cost across the customer base, which is the mechanism by which Energy UK estimates the £7bn figure would translate into an additional £10 to £15 on annual bills.

The VAT cut, while offering a small per-household reduction, was designed against a price environment that has since gotten worse. With the cap rise now forecast to absorb the entirety of that saving and then some, the policy achieves no net reduction in bills for the typical household. Energy UK's call for a social discount tariff signals a shift in the industry's approach from short-term relief measures toward deeper, longer-term intervention, though the specifics of such a tariff, how it would be funded, and the government's willingness to adopt it remain open questions. The 27 August event may offer the first indication of whether that call is gaining traction.