Energy Price Cap Explained: What It Is and How It Affects Your Bill

If you have ever read a headline saying energy bills are going up or down by a certain amount, you have almost certainly been reading about the energy price cap. It is one of the most quoted numbers in UK household finance, and also one of the most misunderstood. Many people assume the cap is a limit on their total bill. It is not, and that misunderstanding causes a lot of confusion.

This guide explains what the price cap actually is, what the current rates are, how Ofgem works the figures out, and — most importantly — what it means for the bill that lands in your inbox.

What is the energy price cap?

The energy price cap is a limit set by Ofgem, the energy regulator for Great Britain, on what suppliers can charge customers who are on a default tariff. A default tariff is the one you end up on if you have never switched, or if your fixed deal ended and you did not choose a new one. It is usually called a standard variable tariff.

The cap does not limit your total bill. Instead, it limits two things:

• The unit rate — the price you pay for each kilowatt hour (kWh) of gas and electricity you use.
• The standing charge — the fixed daily fee you pay simply for being connected, whether you use any energy or not.

Because the cap works per unit, your final bill still depends on how much energy you use. Use more than the typical household and you will pay more than the headline figure. Use less and you will pay less. Our guide to standing charges explained looks at that daily fee in more detail.

The cap covers households in England, Scotland and Wales. Northern Ireland has a separate energy market and its own regulator, so the cap does not apply there. It also does not apply if you are on a fixed tariff — your rates are set by your contract instead, which we cover in fixed vs variable tariffs.

The current price cap: October to December 2026

From 1 October to 31 December 2026, the price cap is £1,723 a year for a typical household paying by Direct Debit. That is 4% higher than the previous period, when the figure was £1,663 a year.

That £1,723 is not a bill anyone actually receives. It is an illustration: Ofgem takes the capped rates and multiplies them by an assumed level of usage to produce one headline number that journalists and comparison sites can quote.

The rates behind the headline, averaged across Great Britain for Direct Debit customers, are:

Your own rates will differ slightly from these averages. The cap is set regionally, because it costs different amounts to transport energy to different parts of the country, and it also varies by how you pay. Paying by Direct Debit is generally the cheapest payment method.

One unusual detail this winter: there is currently no VAT on domestic electricity, after the government removed the usual 5% charge from 1 October 2026 to 31 March 2027. Gas still carries 5% VAT. Ofgem and the government estimate the electricity VAT cut is worth around £45 a year to a typical household, and it is one reason the electricity side of the cap rose only slightly while gas rose more sharply.

What does “typical household” mean?

To produce the £1,723 figure, Ofgem uses what it calls Typical Domestic Consumption Values, or TDCVs. Since 1 July 2026, a typical (medium-use) household is assumed to use:

• 2,500 kWh of electricity a year
• 9,500 kWh of gas a year

That is usually described as two or three people in a two- or three-bedroom home. Ofgem also publishes low-use values (1,600 kWh of electricity and 6,000 kWh of gas) and high-use values (3,800 kWh of electricity and 14,000 kWh of gas).

These typical values matter because Ofgem lowered them in July 2026 — households now use around 7% less electricity and 17% less gas than at the previous review in 2023, when the typical figures were 2,700 kWh and 11,500 kWh. That change makes headline figures from before and after July 2026 hard to compare directly. On the old usage basis, the October cap would have been quoted as £1,935 rather than £1,723, even though the underlying rates are exactly the same. It is a good reminder to compare unit rates and standing charges, not just headline numbers. If you want to see how this plays out for a family home, read our guide to what a typical energy bill for a 3-bed house looks like.

How is the price cap calculated?

Ofgem reviews the cap every three months. Each review looks at the real costs suppliers face, including:

• Wholesale energy costs — the price suppliers pay for gas and electricity in advance. This is usually the biggest single element, and the main reason the cap moves up or down.
• Network costs — the cost of maintaining and upgrading the pipes, wires and cables that deliver energy to your home.
• Policy costs — government schemes paid for through bills, such as support for vulnerable households and incentives for renewable energy.
• Supplier operating costs — metering, billing, customer service and a small allowed margin.

Because wholesale prices are bought in advance, the cap reflects market prices from an observation period before it takes effect, rather than prices on the day.

What happens next?

The cap changes again on 1 January 2027, covering January to March 2027. Ofgem will announce the new level on 25 November 2026.

Forecasters publish estimates well before the announcement. Cornwall Insight, a widely followed energy consultancy, forecast on 30 September 2026 that the January cap would rise to around £1,999 a year for a typical household — a rise of about 16%. Treat that figure with care: it is a forecast, not a confirmed figure, and forecasts move as wholesale prices change. Nothing is certain until Ofgem confirms the level on 25 November.

What should you do about the price cap?

First, check which tariff you are on. If you have never switched, or your fix ended some time ago, you are probably on a capped variable tariff and your rates will change automatically each quarter. You do not need to do anything for the new rates to apply, but it is worth checking whether a fixed deal would suit you better, particularly with a rise forecast for January.

Second, remember that the surest way to pay less under any cap is to use less. Because the cap limits rates rather than totals, every unit you save comes straight off your bill. Finally, make sure your bills are based on real meter readings rather than estimates, so you are not overpaying in the meantime.

Frequently Asked Questions

Is the price cap a maximum bill?

No. The cap limits the unit rate and standing charge on default tariffs, not your total spend. A high-use household will pay well above £1,723 a year, and a low-use household will pay less.

Does the price cap apply to everyone?

It applies to default (standard variable) tariffs in England, Scotland and Wales. It does not apply to fixed tariffs, and Northern Ireland is not covered because it has a separate energy market.

How often does the price cap change?

Every three months: in January, April, July and October. Ofgem announces each new level around five to six weeks before it takes effect.

Why has the headline figure fallen compared with earlier in 2026 if rates went up?

Because Ofgem reduced its typical usage values in July 2026. The £1,723 figure assumes lower usage than earlier headlines did, so the totals are not directly comparable. Compare the unit rates and standing charges instead.

Should I fix my tariff before January?

It depends on the deal and your circumstances. Forecasts suggest the cap may rise in January, but forecasts are not guarantees. Compare any fixed offer’s unit rates and standing charges against the current cap rates using your own annual usage, and check the exit fees before you decide.