UK Domestic Energy Prices Over Time

The energy price cap is the single most quoted number in British household energy, and also the most misunderstood. It does not cap your bill. It sets the maximum a supplier can charge for each unit of gas and electricity and for the daily standing charge, for households on standard variable tariffs in Great Britain¹. The more energy you use, the higher your bill will be, whatever the cap level happens to be¹.

The cap came into force at the beginning of 2019 and is revised by the regulator Ofgem every three months². Over the period this page tracks, the typical annual bill under the cap has moved from £1,277 before the energy crisis, through a peak of £3,371 in the final quarter of 2022, back down to around £1,758 for a typical dual-fuel Direct Debit household in the first quarter of 2026³. Those swings, and the regional and payment-method differences underneath them, are what the published price series actually records.

What the cap limits, and what it does not

The price cap protects people on standard variable tariffs, where the unit rate can go up or down depending on the energy market¹. These are the default tariffs a household ends up on if they have not signed up for a fixed-term contract with their supplier². The cap sets maximum prices for a unit of energy and daily standing charges for customers in each energy supply region of Great Britain, with separate caps for gas and electricity².

What it does not do is limit the annual bill. Ofgem is explicit on this: "It does not limit the cost of your total bill. The more energy you use, the higher your bill will be."¹ The headline annual figure that accompanies every cap announcement is a worked example, not a ceiling. It assumes typical consumption of 2,500 kWh for electricity and 9,500 kWh for gas⁴. A household that uses more than those amounts pays more than the headline figure; one that uses less pays less.

The cap also varies by circumstance. Ofgem lists the factors that change the level that applies to you: where you live, your payment method (Direct Debit, standard credit or prepayment meter), your fuel type and your meter type¹. That is why two neighbours on the same tariff can face different maximum rates, and why a single national number is always an average rather than a rule.

The Treasury described the cap's purpose in similar terms during the crisis: it "protects consumers from the rapid changes observed in the wholesale energy market in the short term"⁷. It is a shock absorber on the way wholesale costs feed through to households, not a subsidy and not a freeze.

The rise to crisis levels and the fall back again

The cap's history divides sharply at 2021. Rapid increases in wholesale energy prices from mid-2021 onwards led to a 54% increase in the price cap in April 2022⁴. Before that rise, the cap stood at £1,277 per year for a household with typical energy consumption³. Carbon Brief's analysis of that April 2022 increase estimated that 87% of it, relative to a year earlier, was due to wholesale prices³.

The crisis then outran the cap itself. The Q4 (October to December) 2022 price cap was £3,371⁴, but the Government intervened with the Energy Price Guarantee, holding the typical bill at £2,500 from January 2023⁸. Even that figure was forecast against a cap that had been expected to rise by a further 30 to 50% in October 2022⁶. The Welsh Government reported at the time that households had seen a typical average household energy bill increase by £693 a year¹⁰.

The recovery has been real but incomplete. When Ofgem announced the April 2025 cap, it noted the level was £531 (22%) lower than at the height of the energy crisis at the start of 2023, when the Energy Price Guarantee was in place⁸. For the October to December 2025 cap, Ofgem put the difference at £625 (26.3%) lower than when the energy crisis was at its peak¹¹. The cap has fallen from £2,500 since January 2023, but it has not returned anywhere near £1,277³.

The path since 2025 has been uneven rather than a steady decline. Ofgem confirmed that the cap for 1 April to June 2026 would fall by 7%⁵, but the July 2026 review then increased the price of electricity by 6% per unit and gas by 28% per unit¹². Estimates reported after the April 2026 fall suggested the cap was expected to stay roughly the same until the end of the year⁵.

How the cap works and its quarterly updates

Ofgem reviews and sets a level for how much an energy supplier can charge for each unit of energy and the daily standing charge every three months¹¹. The quarterly cycle exists because the cap now tracks the wholesale market closely: suppliers buy energy ahead of delivering it, and the cap's allowance for those purchases is built on market prices observed over a defined window before each period. When wholesale costs move, the cap follows, with a lag.

The cap was not always quarterly. When the annual price cap was first designed, it was revised every six months³, and it was introduced across all payment types in January 2019⁴. The move to three-monthly reviews was a response to the volatility of 2021 and 2022, when six-monthly resets left the cap badly out of step with the market between reviews.

Each review produces a full set of numbers: unit rates and standing charges for gas and electricity, for each region, for each payment method, for single-rate and multi-rate meters. The figures for 1 October to 31 December 2025, for example, were published alongside a summary of what had changed and why, with Ofgem citing increases to parts of the costs of transporting energy in Great Britain and costs towards government schemes and essential support¹¹. Ofgem also states that it will be closely monitoring supplier compliance and will continue to take firm action against suppliers who fall short of their requirements¹³.

For a household, the practical consequence is that no figure in this series stays current for long. A unit rate quoted in one quarter is superseded roughly twelve weeks later, and comparing prices across years means comparing cap periods, not calendar years.

What the bill is made of

A domestic energy bill is not one price but a stack of cost components, and the cap is built from the same stack. Ofgem lists them: wholesale costs, network costs, operating, debt and industry costs, EBIT (the supplier's earnings before interest and tax), policy costs, and VAT at 5%¹⁴. The type of energy used, the type of meter installed and how you pay your bill also feed into the calculation¹⁵.

Wholesale costs, the cost a supplier pays to buy energy, are the largest component and the main driver of the swings in the cap¹⁴. Network costs, the cost of moving energy from where it is generated to the customer, are next: they make up around one quarter of the total cap². Policy costs, the levies that fund government schemes, sit on top, and they change with political decisions rather than market ones. The government cut these costs in April 2026 by ending a levy-funded scheme for energy efficiency and shifting funding for the largest renewable generation support scheme to general taxation².

The House of Lords Library examined the rise in bills since pre-crisis levels and found that 54% of it was due to higher wholesale prices, with network charges and "green levies" accounting for 20% and 6% of the rise respectively¹⁶. That breakdown matters for anyone trying to read the price series intelligently: most of what households have experienced since 2021 is the wholesale market, and only a minority is policy.

Standing charges: what you pay regardless of consumption

The standing charge is a fee you pay each day, even if you do not use any energy on that day¹⁷. It covers the costs of supplying a home that do not vary with consumption, and it is capped alongside the unit rate: the cap is the maximum amount your supplier can charge for a unit of energy and the standing charge together¹.

Because the charge is daily, it weighs most heavily on low-usage and low-income households, and it has become one of the most contested parts of the bill. The published averages give a sense of the level: for the July 2026 cap the electricity standing charge was 57.19p per day, falling to 54.83p per day under the October cap¹⁸, and for 1 January to 31 March 2026 the electricity standing charge was 54.75p per day⁵. Over a year, a daily charge in the mid-50s pence range amounts to roughly £200 before a single unit is consumed³.

The regional tables make the spread visible. For 1 July to 30 September 2026, the annual electricity standing charge cap ranged from £172.77 in the Southern region to £223.48 in the Northern region, with the Midlands at £207.57 and London at £181.21¹⁹. A levelisation allowance exists specifically for making sure prepayment and Direct Debit customers pay the same standing charge¹.

Why the cap depends on where you live

A separate price cap is set for each of the 14 regions and applies throughout the region, with no breakdown below regional level². The reason predates the crisis: Ofgem's original consultation on the cap set out that "the cap level will vary across Great Britain, because the costs of transporting the energy from the generation source to the customer (the 'network charges') vary by region"²⁰.

The differences are not trivial. For 1 October to 31 December 2025, the standard credit electricity cap for a single-rate meter at 3,100 kWh was £983.41 in London and £1,008.32 in the Southern region, with the Eastern region at £1,023.11²¹. At zero consumption, the annual standing charge element alone ranged from £158.87 in the Southern region to £207.59 in Yorkshire in the Charge Restriction Period 15b tables²².

For 1 July to 30 September 2026, the annual electricity bill at 2,500 kWh ranged from £801.74 in the Southern region to £843.39 in London, with the South East at £824.22 and the Midlands at £810.72¹⁹. A household cannot change its region, but it can recognise that the national headline is an average of fourteen different caps, and that its own maximum rates are on its bill, not in the news release.

Comparing Direct Debit, standard credit and prepayment

The cap is set separately for each payment method, because the costs of serving each group differ. For 1 October to 31 December 2025, the typical annual totals were £1,755 for Direct Debit customers, up from £1,720 the previous quarter; £1,890 for standard credit customers, up from £1,855; and £1,707 for prepayment customers, up from £1,672¹³.

The standard credit premium is a long-standing feature. When the April 2024 cap was set, Ofgem stated that "customers who pay by standard credit (cash or cheque) will pay an additional £106 compared to those who pay by Direct Debit"²³. The same letter set out the prepayment position: from 1 April 2024, "prepayment customers will typically pay £49 per year less (or £52 per year less including VAT)"²³, delivered through the levelisation allowance.

Meter type interacts with payment method. For 1 July to 30 September 2025, an Economy 7 customer on standard credit paid an additional £82 for electricity compared with Direct Debit²⁴, while for 1 April to 30 June 2025 an Economy 7 prepayment customer paid £25 less compared with paying by Direct Debit²⁵. The cap applies to default tariffs regardless of how you pay, but the level that applies depends on it⁵.

How unit rates have changed

The unit rate is where the crisis is most visible in the long series. Rounded averages of the cap's electricity unit rate show the shape: 28p per kWh for 1 April to 30 September 2022⁴, rising to 34p per kWh for 1 October 2022 to 30 March 2023², then 22p per kWh for 1 July to 30 September 2024², 27p per kWh for 1 April to 30 June 2025², 24p per kWh for 1 October to 31 December 2024⁴, and 26p per kWh for 1 October to 31 December 2025¹⁸. Gas moved on the same path, from 10p per kWh at the crisis peak² to 6p per kWh in late 2025¹⁸.

The more recent figures show the same volatility at a lower level. For 1 October to 31 December 2025, a household on a standard variable tariff paying for electricity by Direct Debit paid on average 26.35 pence per kilowatt hour, including VAT, averaged across England, Scotland and Wales¹¹. For 1 January to 31 March 2026 the electricity unit rate was 27.69p per kWh⁵, and the July 2026 cap carried an electricity unit rate of 26.11p per kWh¹⁸.

Two features of the series deserve attention. First, the fall from the peak has been much sharper in cash terms for the standing charge and gas than for electricity unit rates, which have settled in a band in the mid-20s pence. Second, the July 2026 increase, 6% per unit for electricity and 28% per unit for gas¹², shows that the series is still capable of sharp moves in both directions.

Who the cap covers, and who it does not

The cap protects people on standard variable tariffs¹. It applies where a customer has not signed up for a fixed-term contract with their supplier². Outside that sit several groups:

• Households that have agreed a fixed tariff with their supplier¹
• Business energy contracts¹
• Homes on heat networks¹
• Homes using heating oil¹

The Energy Price Guarantee, the crisis-era support scheme, operated for the most part in the same way for households across the whole of the UK, with differences for Northern Ireland²⁶. But the guarantee has ended, and the cap that replaced it as the standing protection covers Great Britain only.

For households on fixed tariffs, the cap is irrelevant while the fix lasts: the rate is contractual, and it can sit above or below the cap level. The cap becomes relevant again when the fix ends and the household rolls onto its supplier's standard variable tariff, at which point the capped maximum rates apply.

Northern Ireland's distinct market and regulator

Northern Ireland sits outside the Ofgem price cap altogether. Energy prices were not capped in Northern Ireland during the crisis, and energy suppliers there have the flexibility to set their tariffs independently to reflect their costs of operating²⁶. Support during the crisis came through a separate Energy Price Guarantee scheme for domestic consumers in Northern Ireland, under ministerial directions made under the Energy Prices Act 2022²⁷.

The Northern Ireland scheme mirrored the GB one in scope: it was intended for customers on domestic tariffs, with some non-domestic premises with similar metering and tariff arrangements in scope, including places of worship, some farms and small businesses operating from former dwelling-houses²⁷. The guarantee provided a unit rate discount, reported as up to 13.6p/kWh for electricity and 3.9p/kWh for gas from January 2023 to March 2023²⁶. The gas direction applied to Northern Ireland and did not apply to tariffs notified to a consumer before the effective date or taking effect after the scheme end date²⁸.

Regulation is devolved and separate. Consumer protection and regulation of heat networks in Northern Ireland are devolved to the Northern Ireland Assembly⁶, and the Utility Regulator's Code of Practice for Consumers in Vulnerable Circumstances applies to all electricity and gas suppliers, the gas network operators Evolve, firmus energy and Phoenix Energy, NIE Networks and NI Water²⁹. Households there also have distinct support routes, such as the home heating oil support scheme for Northern Ireland residents³⁰.

What the price series tells us about household self-reliance

The record of the past five years is unambiguous about one thing: a household buying all its energy from a supplier on a variable tariff has no protection from the wholesale market beyond the cap's smoothing. The cap limited how fast costs rose, and the Energy Price Guarantee limited how far, but neither changed the household's exposure to the underlying prices. A home that uses less energy, or generates some of its own, reduces that exposure directly, and the record installations of recent years suggest many households have drawn that conclusion.

The series also shows what the cap cannot do. It cannot hold prices at pre-crisis levels: the typical bill in early 2026, around £1,758⁵, remains far above the £1,277 of early 2022³. It cannot protect fixed-tariff households from the market price they lock in, and it does nothing at all for homes on heating oil or heat networks. The standing charge, paid every day regardless of use¹⁷, is a fixed dependence that no amount of careful consumption reduces.

For anyone using this series to understand their own position, the honest reading is that the cap is a floor under the rate, not a ceiling on the cost. The figures on a household's own bill, for its own region, payment method and meter, are the ones that determine what energy independence is worth, and the official statistics publications behind them, including the home energy statistics on this site, are where the underlying data can be checked.