The price cap will hit £1,717 from October – and Cornwall Insight now expects it to stay above £1,700 through January. That is the fourth consecutive quarter above the pre-crisis average, and it means another winter of high bills for 28 million households.
The consultancy’s latest forecast, as reported by Cornwall Insight, shows wholesale gas prices remain stubbornly high and network charges are rising. The catch is that the government’s energy price guarantee ended in June 2023 – households now bear the full market cost.
What it costs a typical 3-bed semi
Ofgem’s price cap sets a maximum unit rate, not a fixed bill. A household using 12,000 kWh of gas and 2,900 kWh of electricity – typical for a 3-bed semi – will pay about £1,717 a year from October. That is £63 more than the current cap, and Cornwall Insight expects a further £30-£40 rise in January.
For context, bills were £1,250 in winter 2021-22. The cumulative increase since then is roughly 37%. Every degree you turn down the thermostat saves about £80 a year, but that only goes so far when the baseline is this high.
Who qualifies – and who doesn’t
The Winter Fuel Payment is now means-tested: only households on Pension Credit or other qualifying benefits get £200-£300. The Warm Home Discount gives £150 to low-income households on certain tariffs. But the vast majority – middle-income families, private renters, and those just above the threshold – get nothing.
What this misses is the structural problem: the UK’s housing stock leaks heat. The Energy Saving Trust estimates that a detached home with no loft insulation loses 25% of its heat through the roof. For a typical semi, cavity wall insulation saves about £300 a year. Yet the government’s Great British Insulation Scheme has reached only 300,000 homes since 2023 – a fraction of the 19 million that need it.
What you can do before December
Draught-proofing is the cheapest fix: £200-£300 for a professional job, or £50 for DIY strips and seals. It cuts heat loss by up to 20% and pays back in one winter. Loft insulation costs £500-£1,000 (installed) and saves £200-£400 a year, depending on depth and property type.
For bigger savings, a heat pump costs £7,000-£13,000 installed under the Boiler Upgrade Scheme, which gives a £7,500 grant. Running costs are roughly 20-30% lower than a gas boiler at current prices, and the grant covers most of the upfront difference. The catch is that you need a well-insulated home first – heat pumps work best at lower flow temperatures, so draughts and poor insulation reduce efficiency.
Households on standard variable tariffs should also check if they can fix a rate. Fixed deals are returning, but the cheapest are still 5-10% above the cap. Compare via Ofgem’s approved comparison sites, and avoid exit fees if you might switch again.
Apply for the Boiler Upgrade Scheme through your installer – grants are first-come, first-served and the current budget runs to March 2025. For insulation, check if your energy supplier offers free or subsidised surveys under the Energy Company Obligation. The deadline for ECO4 applications is March 2026, but installer capacity is limited.
Frequently Asked Questions
Cornwall Insight predicts the price cap will stay above £1,700 through at least January 2025. A drop below £1,600 is possible next summer if wholesale gas prices fall, but that depends on geopolitical factors and storage levels.
Draught-proofing windows and doors costs as little as £50 in DIY materials and can reduce heating demand by 10-20%. Turning the thermostat down by 1°C saves about £80 a year. For larger savings, loft insulation (£500-£1,000 installed) pays back in 2-3 years.
