The typical dual-fuel bill will rise by £63 in October, the third increase in 12 months. Ofgem confirmed the new price cap on 23 August, pushing annual costs for a household using 12,000 kWh of gas and 2,900 kWh of electricity to £1,717.
As reported by Wales Online, the regulator is urging households to “make a comparison today” and consider switching suppliers. But for homeowners, the advice goes deeper than a tariff swap.
Why the cap rise hits homeowners differently
The price cap covers standard variable tariffs, the default for roughly 28 million households. Yet the cap does not cap the total bill. It caps the unit rate and standing charge. A typical 3-bed semi using 12,000 kWh of gas and 2,900 kWh of electricity pays £1,717. A draughty 4-bed detached using 18,000 kWh pays nearer £2,400.
Standing charges, which cover network maintenance and supplier overheads, remain at around £300 a year for dual-fuel customers. That is the same whether you use 1 kWh or 10,000 kWh. For homeowners who have already reduced consumption through insulation, the standing charge now is a larger proportion of the bill, a regressive cost that efficiency alone cannot fix.
Yet the cap increase is a signal. The wholesale gas price has risen 12% since June, and Ofgem expects further volatility this winter. Locking in a fixed tariff now, typically 6–8% below the cap, could save £100–£200 a year for the average household. Comparison sites such as MoneySavingExpert and Citizens Advice recommend switching before the cap takes effect on 1 October.
What this means for EPC ratings and home upgrades
The price cap rise sharpens the case for fabric-first retrofits. Insulating a loft to 270 mm costs roughly £500–£700 and saves £150–£200 a year on heating. Cavity wall insulation costs £600–£1,000 and saves £200–£300. Draught-proofing windows and doors can cost under £200 and save £40–£60. These upgrades improve an EPC rating by at least one band, and unlike a tariff switch, the savings are locked in regardless of future price caps.
Heat pumps and solar panels remain longer-term plays. A typical air-source heat pump installation costs £7,000–£13,000 after the Boiler Upgrade Scheme grant of £7,500. Solar panels for a 3-bed semi cost £5,000–£6,500 and save £300–£600 a year on electricity. But these technologies work best on a well-insulated shell. Homeowners who skip fabric upgrades risk higher running costs and shorter equipment lifespans.
The Energy Saving Trust advises: insulate first, then electrify. The October price cap rise does not change that sequence, it makes it more urgent.
Who qualifies, and who doesn’t
Households on standard variable tariffs are the most exposed. Prepayment meter customers typically pay slightly less under the cap, but still face the same standing charge issue. Warm Home Discount recipients, low-income households, will get £150 off their electricity bill this winter, but that is a one-off payment, not a structural solution.
The catch: switching tariffs is not possible for everyone. Some households are in debt to their current supplier, or live in properties with outdated meters that prevent a switch. Others are on social tariffs that are already below the cap. For these groups, the focus shifts entirely to demand reduction: turning down the thermostat by 1°C saves £80–£100 a year, according to the Energy Saving Trust.
Officials have not confirmed any additional support beyond the Warm Home Discount and the existing Energy Price Guarantee for vulnerable households. The government’s Great British Insulation Scheme, which offers free or subsidised insulation for low-income homes, reopened applications in July. Eligibility depends on council tax band and property type.
What to do by 1 October
Check your current tariff. If you are on a standard variable rate, compare fixed deals on Ofgem-accredited sites such as MoneySavingExpert or Citizens Advice. Look for a tariff with no exit fees and a fixed term of 12 months. Lock in before 1 October.
Book a home energy assessment. The Energy Saving Trust offers a free online tool, or you can pay £50–£100 for a professional survey that identifies the cheapest fabric improvements. Prioritise loft insulation, cavity wall insulation, and draught-proofing. Apply for the Great British Insulation Scheme if you qualify.
Set a thermostat schedule. Reducing the heating by 1°C and timing it to run only during occupied hours cuts bills by 8–10%. That is £80–£100 off a £1,717 bill, more than the cap increase itself. Do it before the clocks change on 27 October.
Frequently Asked Questions
Not always, but for most households on a standard variable tariff, a fixed deal 6–8% below the cap will save £100–£200 a year. Compare on Ofgem-accredited sites and check for exit fees. If your current tariff is already below the cap, switching may not help.
The price cap is unlikely to drop significantly before 2025. The Boiler Upgrade Scheme grant of £7,500 is fixed until March 2027. If your home has good insulation, installing a heat pump now locks in lower running costs and improves your EPC. If not, insulate first.
