The price cap will rise by £63 in October, the third increase this year. Yet buried in the headlines is a quieter, more actionable figure: £221. That’s the annual saving available to households who switch from a standard variable tariff to the best fixed-rate deal before 31 March, as reported by the Daily Express. For a 3-bed semi using 12,000 kWh of gas and 2,900 kWh of electricity a year, that’s not pocket change, it’s roughly one month’s grocery budget.
Who qualifies, and who doesn’t
Ofgem’s data shows roughly 11 million UK households are still on standard variable tariffs (SVTs). These are the default plans suppliers put you on when a fixed deal ends, and they track the price cap, meaning they rise and fall with the market. The catch is that fixed-rate deals, which lock in a unit price for 12 months, are currently cheaper than the cap. Energy Saving Trust analysis confirms that the gap between the cheapest fixed deal and the SVT is about £221 for a typical dual-fuel household. But not everyone can switch: households in debt of more than £500 to their supplier, or those with a prepayment meter on certain tariffs, may face restrictions. The Energy Ombudsman advises checking your balance before starting.
What it costs a typical 3-bed semi
Let’s make this concrete. A typical 3-bed semi in the UK uses around 12,000 kWh of gas and 2,900 kWh of electricity per year, according to Ofgem’s typical domestic consumption values. Under the current price cap (January to March 2025), that costs roughly £1,928 a year. The cheapest fixed deal available today, via comparison sites like Uswitch or MoneySavingExpert, comes in at about £1,707. That’s a straight £221 saving. No behavioural change, no insulation upgrade, no solar panels. Just a 15-minute online form. The deadline is 31 March because suppliers are expected to raise fixed rates after that, as wholesale energy prices tick up again. Ofgem’s next cap announcement in April could also narrow the gap.
But is it worth fixing now?
The honest answer is: for most households, yes, but with two caveats. First, fixed deals typically come with exit fees of £25–£50 per fuel if you leave early. If you think you might move house within the year, check the terms. Second, if wholesale prices fall further after April, a fix could lock you into a higher rate. But the consensus among analysts, including Cornwall Insight, is that prices are more likely to rise than fall in the second half of 2025. The £221 saving is a bird in the hand. The government’s Great British Insulation Scheme and ECO+ grants are separate routes to cut bills long-term, but they take months. Switching takes minutes.
What to do now
First, find your latest bill or log into your online account. Note your annual usage in kWh (not pounds). Go to a comparison site, Ofgem-accredited ones like Citizens Advice’s energy comparison tool are free and impartial. Enter your postcode and usage. Pick the cheapest fixed deal that doesn’t lock you in for more than 12 months. The switch takes 14–21 days to complete. Do it before 31 March. After that, the £221 saving, and the window, closes.
Frequently Asked Questions
No. Switching energy tariffs does not change your property's Energy Performance Certificate rating. EPC ratings are based on the building's fabric, insulation, glazing, heating system, not your supplier or tariff. However, the £221 saving frees up cash you could invest in EPC-boosting upgrades like loft insulation or a heat pump.
Prepayment meter customers can also switch, but the best fixed deals are often less generous. The saving is typically around £150 rather than £221. Check with your current supplier first, some have specific prepayment tariffs. If you're in debt, you may need to clear it before switching. The Energy Saving Trust recommends speaking to your supplier or StepChange for advice.
