If you pay a gas or electricity bill in the UK, the energy price cap directly affects how much you pay. Most people have heard the term but are unclear on exactly what it does, who sets it, and why their bill keeps rising even when a cap is in place. This guide explains how the price cap works in plain English, what it currently costs a typical household, how it’s calculated, and why bills are set to keep climbing into 2027.
If you want to understand what the ongoing Middle East conflict is doing to your bill specifically, the Iran conflict energy bills guide and calculator lets you work out your personal projected increase.
What is the energy price cap?
The energy price cap does not cap your total energy bill. This is the most common misunderstanding about how it works, and it’s worth being clear about from the start. What the cap limits is the unit rate you pay for each kilowatt hour of gas and electricity you use, and the maximum daily standing charge your supplier can apply. If you use more energy, you pay more. The cap limits the rate, not the total amount on the bill.
To use a simple comparison: the price cap is like a petrol price guarantee that limits what forecourts can charge per litre. If the limit is £1.50 a litre, you cannot be charged more than that per litre — but if you fill a large tank rather than a small one, your total cost is still higher. The cap limits the rate, not the total.
How much is the energy price cap right now?
The current price cap, covering 1 October to 31 December 2026, is £1,723 a year for a typical dual-fuel household paying by direct debit — a 4% rise on the previous quarter. It’s the second consecutive increase, following a 13% jump in July, and takes gas costs to their highest level since early 2023.
That £1,723 figure is based on Ofgem’s revised Typical Domestic Consumption Values, which changed on 1 July 2026 and now assume a household uses 2,500 kWh of electricity and 9,500 kWh of gas a year (down from 2,700 kWh and 11,500 kWh). On the old consumption basis, the same October rates work out at £1,935 — Ofgem publishes both figures, but the two aren’t directly comparable, so check which basis any older article or forecast is using before comparing it to the current cap.
The current unit rates and standing charges, for a typical direct debit customer across England, Scotland and Wales, are:
– **Electricity:** 26.32p per kWh, with a standing charge of 54.83p a day. There’s no VAT on electricity from October 2026 to March 2027, following a temporary government cut.
– **Gas:** 7.97p per kWh, with a standing charge of 29.68p a day, including 5% VAT.
Who sets the energy price cap?
The energy price cap is set by Ofgem, the Office of Gas and Electricity Markets. Ofgem is the independent regulatory body for the energy industry in Great Britain. It was established in 2000 and operates under powers granted by Parliament. It is not a government department and is not directly controlled by ministers, though it operates within a framework set by legislation and government policy.
Ofgem introduced the energy price cap in January 2019, following years of concern that customers on standard variable tariffs were being significantly overcharged compared to what competitive market rates would justify. Before the cap, a household that didn’t switch supplier regularly could end up paying substantially more than an active switcher for identical energy. The cap was designed to eliminate this loyalty penalty. Around 22 million households on default tariffs are currently protected by it.
The cap applies in England, Scotland and Wales. Northern Ireland has a separate regulatory framework, with the Utility Regulator setting equivalent protections for Northern Irish consumers.
When is the next energy price cap announced?
The price cap is reviewed and updated four times a year, changing on 1 January, 1 April, 1 July, and 1 October. Until 2022 it changed every six months, but the extreme volatility of wholesale energy prices during the 2021–2022 energy crisis led Ofgem to move to quarterly reviews so the cap could respond more quickly to market movements in both directions.
The next cap, covering January to March 2027, will be confirmed by 25 November 2026, based on wholesale prices during an assessment window running from 19 August to 18 November 2026. Announcements after that follow on 23 February 2027 (for April–June 2027) and 26 May 2027 (for July–September 2027).
Will the energy price cap go up again in January 2027?
On the only forecast currently published, yes. Cornwall Insight expects the January–March 2027 cap to rise around 9%, to roughly £1,872 a year for a typical dual-fuel household — £149 above the confirmed October figure. That would put bills about 18% higher than the January 2026 cap.
Other forecasters are less optimistic. Some suppliers have pencilled in increases closer to 18%, which would put the cap above £2,000, and some City forecasters have warned of rises of 25–30% if Middle East tensions continue disrupting gas supply. The January figure won’t be confirmed until late November 2026, and there’s a lot of time left in the assessment window for wholesale prices to move in either direction, so treat any January forecast — including this one — as a snapshot rather than a certainty. Wholesale gas alone makes up more than 40% of the cap, and continued supply disruption plus low winter gas stocks across Europe are the main reasons forecasters expect further rises rather than a fall.
How is the energy price cap calculated?
Ofgem calculates the cap by working out the genuine costs that energy suppliers face in providing gas and electricity to households, and setting the cap at a level that allows efficient suppliers to recover those costs while making a reasonable margin. The main components are:
Wholesale energy costs make up the largest single element — the prices suppliers pay on wholesale markets to buy the gas and electricity they then sell to consumers. Wholesale prices are set by global markets and reflect supply and demand, geopolitical events, weather patterns, and the price of competing fuels. When wholesale prices rise, the cap follows.
Network costs cover the transmission and distribution infrastructure that gets gas through pipes and electricity through cables to homes. These costs are relatively stable and include maintenance, operation, and upgrade of the national grid and local distribution networks.
Policy and environmental costs fund schemes like the Warm Homes Discount. These have historically been bundled into unit rates, though the government removed the Energy Company Obligation and Renewables Obligation elements from unit rates in April 2026, cutting around £150 from a typical bill.
Operating costs and supplier margin cover the costs of running an energy supply business and a regulated profit margin (EBIT) for efficient suppliers, alongside a “headroom” allowance for uncertain costs and risks, and VAT (5% on gas; 0% on electricity until March 2027).
Ofgem publishes the full methodology and detailed calculation each quarter.
Who is covered by the price cap?
The price cap applies to households on standard variable tariffs and default tariffs — the tariffs customers end up on automatically when they don’t actively choose a different product. The vast majority of UK households are on variable tariffs and are therefore covered.
Households on fixed-rate tariffs are not covered by the cap in the same way. A fixed tariff locks in a specific unit rate for the duration of the contract regardless of what the cap does. This can be beneficial when the cap is rising, because the fixed rate may sit below the capped level — around 35% of households (roughly 11 million) are currently on fixed deals and are unaffected by the recent rises. It can be costly when the cap falls significantly, because the fixed rate may end up above the new capped level.
What is the prepayment price cap?
Prepayment meter customers — around 4–5 million households — are covered by a separate prepayment price cap, reviewed independently of the direct debit cap. It rose from £1,620 to £1,678 for the October to December 2026 period, remaining slightly below the direct debit cap of £1,723, with prepayment customers typically paying the lowest rates of any payment method.
The cap does not apply to heating oil or LPG. Households using these fuels — around 1.7 million on oil and roughly 150,000 on LPG — have no equivalent price protection. When global oil prices spike, as they have through the ongoing Middle East conflict, oil and LPG households face the full impact immediately with no regulatory buffer. This is covered in detail in the guide to why the Iran conflict is hitting oil and LPG households harder than gas.
What are the benefits of the price cap?
The clearest benefit is protection from the loyalty penalty that existed before its introduction. Before 2019, customers who stayed with the same supplier on a standard variable tariff for several years could end up paying substantially more than customers who switched regularly. The cap means no household on a standard variable tariff can be charged more than the capped unit rate, regardless of how long they’ve been with their supplier.
The cap also provides a form of price stability, since it’s set on average wholesale prices over an assessment window rather than reacting to daily market movements — a sharp spike in one week doesn’t immediately translate into higher household bills.
During the 2021–2023 energy crisis, the cap prevented wholesale prices from passing through to consumers at their full magnitude. When Ofgem calculated that the cap would need to rise to £4,279 in January 2023 to cover supplier costs, the government introduced the Energy Price Guarantee to cap bills at a lower level, subsidising the difference. Without the regulatory infrastructure of the price cap, this kind of targeted consumer protection would have been much harder to implement quickly.
What are the criticisms of the energy price cap?
The most fundamental limitation is that it limits unit rates, not total bills. In periods of cold weather, a household using significantly more energy than the Ofgem typical will pay significantly more than the headline cap figure, even though their unit rates are capped.
Critics argue the cap reduces the incentive to switch suppliers and shop around, because it removes the worst outcomes from staying on a standard variable tariff.
The standing charge remains a particular point of contention. Standing charges — the daily fee paid simply for being connected to the network — now average around £200 a year for electricity and £108 for gas under the October 2026 cap. Campaigners including Martin Lewis have argued that standing charges unfairly penalise low-usage households, because the daily charge is the same regardless of how little energy is used. Ofgem has begun requiring suppliers to offer at least one low standing charge tariff option, but the broader structure remains a point of criticism.
How is the ongoing Middle East conflict affecting UK energy bills?
The price cap’s quarterly structure means events that move wholesale prices sharply can take several months to feed through into household bills. Renewed US-Israeli-Iranian conflict since mid-2026 pushed UK wholesale gas prices sharply higher, driving the 13% jump in the July cap and contributing to October’s further 4% rise. Gas unit rates are now around 27% higher year-on-year, the highest level since early 2023, while electricity rates have been held roughly stable, helped by the temporary VAT cut.
Mixed signals over the next stage of the conflict, combined with a summer heatwave across Europe, supply disruption in Norway, and strong demand from Asia, have left winter gas stocks lower than usual — particularly in continental Europe. That’s the main reason forecasters expect January’s cap to rise further rather than ease. For the full breakdown of what this means for your specific bill, see the Iran conflict bill impact calculator.
What doesn’t the price cap protect you from?
The cap cannot protect you from high bills caused by high usage. It cannot protect oil and LPG households. It cannot prevent large increases when wholesale costs rise significantly and sustain that level through the quarterly assessment period. And it doesn’t apply to fixed tariffs, meaning households that lock in during a period of elevated prices may find themselves above the cap level if wholesale prices subsequently fall.
The most durable protection against energy bill volatility is reducing how much energy your home consumes in the first place. A well-insulated, draught-proofed home pays less regardless of where the cap is set. Thermostat management, draught-proofing, radiator balancing, and insulation improvements all reduce consumption and therefore exposure to cap increases.
For households who may qualify for free insulation and heating improvements, the Warm Homes Local Grant provides up to £30,000 of improvements for eligible households with incomes under £36,000. The full range of current schemes is covered in the energy grants and support hub.
Energy price cap history: how has it changed?
The price cap was introduced in January 2019 at £1,137 for typical use. It remained relatively stable until the 2021–2022 energy crisis, when post-pandemic demand recovery, reduced Russian gas supply, and the invasion of Ukraine drove wholesale prices to historic highs.
The cap rose from £1,277 in October 2021 to £1,971 in April 2022, then to £3,549 in October 2022, at which point the government introduced the Energy Price Guarantee, capping bills at £2,500 through subsidy. The EPG was withdrawn in July 2023 as wholesale prices fell back, and the cap subsequently eased to levels not seen since before the crisis — reaching £1,584 in January 2026.
From there, the cap fell to £1,641 in April 2026, reflecting the removal of green levies from unit rates. It then rose sharply as the Middle East conflict escalated: up 13% to £1,663 in July, and up a further 4% to £1,723 in October. Cornwall Insight currently forecasts a further 9% rise to around £1,872 for January 2027, though this won’t be confirmed until late November.
For the complete picture on keeping your home warm efficiently and managing heating costs regardless of where the cap sits, the complete guide to keeping a UK home warm for cheap covers the full range of practical improvements in the order that tends to produce the best results.
