The July energy price cap will rise by £221 on an average bill, the largest single increase since the cap was introduced in 2019. Ofgem confirmed the figure last week, blaming wholesale gas costs and network charges. For a typical 3-bed semi using 12,000 kWh of gas and 2,900 kWh of electricity, that means a new annual total of £1,928.
Martin Lewis, the consumer finance expert, has published a guide on how to get ahead of the rise, as reported by The Independent. His advice focuses on switching tariffs, claiming benefits, and adjusting usage habits. But for homeowners, the bigger question is structural: how do you stop these rises hitting your pocket every year?
Who qualifies, and who doesn’t
Lewis recommends households on standard variable tariffs move to a fixed deal before July. The cheapest fixes right now are around £1,700 a year, about £230 below the new cap. But the catch is exit fees: typically £50–£75 per fuel. If you leave before the fix ends, that saving vanishes.
Ofgem’s data shows that 15% of households are on prepayment meters, which face a slightly higher cap of £1,985. Those on Economy 7 or other time-of-use tariffs have different rates, check your supplier’s specific cap breakdown. The Energy Saving Trust estimates that 4 million households could save by switching, but only if they have no debt and a smart meter.
What it costs a typical 3-bed semi
The £221 rise breaks down unevenly. Gas costs are up 12% because of wholesale prices; electricity is up 8%, partly due to network charges rising 9%. For a semi-detached house in Manchester, that adds roughly £15 a month to gas and £6 to electricity.
But the real cost is cumulative. Since 2021, the cap has risen by over £1,000. Households that have done nothing, no insulation, no tariff switch, no solar, are paying 60% more than three years ago. The government’s Great British Insulation Scheme offers free or subsidised loft and cavity wall insulation for low-income homes, but take-up has been slow: only 12,000 installations in the first six months, according to documents seen by The Guardian.
The structural fix: EPC upgrades that work
Lewis’s tips are short-term. The long-term answer is to reduce your energy demand. A home with an EPC rating of C uses about 25% less energy than one rated D. The typical cost to go from D to C is £5,000–£10,000 for insulation, draught-proofing, and a new boiler or heat pump.
Solar panels, at £5,000–£7,000 for a 4 kW system, can cut electricity bills by 40–60% depending on orientation and battery storage. The Smart Export Guarantee pays you 5–15p per kWh exported, adding £100–£200 a year. Heat pumps, costing £7,000–£14,000 after the BUS grant of £7,500, can halve heating bills if the home is well-insulated.
But here’s the rub: these upgrades need upfront cash or a loan. The government’s Boiler Upgrade Scheme has funded 20,000 heat pumps since 2022, but that’s a fraction of the 1.7 million gas boilers sold each year. The Treasury has not committed to expanding the scheme beyond 2028.
For most households, the cheapest fix is still a smart thermostat and radiator valves, about £200 installed, cutting heating use by 10–15%. That alone saves £30–£50 a year against the new cap.
How to act now
Check your current tariff on your latest bill. If you’re on a standard variable, compare fixed deals on Ofgem-accredited comparison sites. Switch before July if exit fees are zero or less than the saving. Apply for the Great British Insulation Scheme through gov.uk if your household income is under £31,000. For solar, get at least three quotes from MCS-certified installers.
The price cap will rise again in October, analysts expect another 5–8% increase. Households that lock in a fix and cut their usage now will be £300–£500 better off by Christmas. The window for action closes on 30 June, when the current fixes expire.
Frequently Asked Questions
Yes, if you can find a fix below the new cap of £1,928 and have no exit fees. Typical fixes are around £1,700, saving £228 a year. But check for exit fees of £50–£75 per fuel, they wipe out the saving if you move house or switch early.
Loft insulation (costs £300–£500, saves £100–£150 a year) and smart heating controls (£200, saves £30–£50) are the fastest payback. Solar panels (£5,000–£7,000) save £400–£600 annually. Heat pumps are only cost-effective in well-insulated homes with a BUS grant.
