The price cap will rise by £63 in July, the first summer increase since the cap began. That adds to a record £3.7bn of household energy debt, up 12% in three months, as reported by Sky News. For the 28 million households on standard variable tariffs, this means a typical bill of £1,762 a year from 1 July, according to Ofgem’s latest figures.
Why a summer price cap rise matters
Winter increases are expected. A summer hike is not. Ofgem adjusts the cap every three months based on wholesale gas prices, network costs, and supplier margins. The July rise comes despite lower wholesale prices in spring, because suppliers are recovering bad debt from the £3.7bn owed. That debt is now baked into every bill, about £130 per household, the regulator confirmed to the House of Commons Business Committee last month. The catch is that households already behind on payments will see their debts grow faster, as the cap rises and standing charges remain near record highs of 60p a day for electricity and 31p for gas.
What it costs a typical 3-bed semi
Take a 3-bed semi in Manchester using 12,000 kWh of gas and 2,900 kWh of electricity a year. Under the July cap, that household will pay roughly £1,762 annually, or £147 a month. Standing charges alone cost £332 a year before any energy is used. For a household in debt, the repayment plan adds another £20–£30 a month. The Energy Saving Trust estimates that loft insulation (270mm) costs £300–£400 and cuts heating bills by £180 a year. Cavity wall insulation costs £700–£1,500 and saves £250 a year. Solar panels (4 kW system) cost £5,000–£6,500 and save £500–£1,200 a year on electricity. These upgrades pay back within 3–10 years and improve the EPC rating from D to C or B, which adds value at sale time.
Who qualifies for help, and who doesn’t
The government’s Great British Insulation Scheme offers free or subsidised loft and cavity wall insulation for low-income households in EPC bands D–G. The Energy Company Obligation (ECO4) provides free upgrades to those on means-tested benefits. But households just above the threshold, earning £31,000 a year, get nothing. The Warm Home Discount gives £150 off electricity bills to pensioners and low-income households, but only if you apply by 28 February 2025. For everyone else, the only option is to pay the higher cap or cut usage. Ofgem data shows 6.3 million households are in debt, up from 4.8 million a year ago. The number of prepayment meter installations has jumped 40% in the past year, often without consent, as suppliers try to recover debts.
What to do now
First, check your EPC rating at gov.uk. If it’s D or below, apply for the Great British Insulation Scheme through your supplier. Second, switch to a fixed tariff if you can, some fixes are 10% below the July cap, but only for low-usage households. Third, consider solar PV with a battery if you have south-facing roof space and a £5,000 budget; the 0% VAT on installations runs until March 2027. Fourth, contact your supplier if you’re in debt, they must offer a repayment plan you can afford under the regulator’s rules. The price cap will rise again in October, by another estimated £80. Acting now means locking in lower costs before winter.
Frequently Asked Questions
Yes, analysts at Cornwall Insight forecast a further increase of around £80 in October, taking the typical annual bill to £1,842. Ofgem will confirm the October cap on 27 August 2025.
The Great British Insulation Scheme is available to households in EPC bands D–G with a gross income under £31,000, or if you receive certain benefits. If you don't qualify, you can pay for insulation yourself, loft insulation costs £300–£400 and pays back in two years.
