ICAEW chart of the week: Energy price cap

My chart for ICAEW this week looks at the domestic energy price cap since its peak in the first quarter of 2023.

Column chart on the energy price cap by quarter since 2023. There is a vertical line between 2023 Q4 and 2024 Q1 to show the point when typical energy usage changed. 

Price cap 2023 Q1 £4,279, Q2 £3,280, Q3 £2,074 and Q4 £1,923; 2024 Q1 £1,928, Q2 £1,690, Q3 £1,568 and Q4 £1,179; 2025 Q1 £1,738, Q2 £1,849, Q3 £1,720 and Q4 £1,698 (pale colours as a forecast). 

Bars show annual standing charges and per kWh electricity and gas prices for each quarter as set out in the accompanying article. 

4 Jul 2025. Chart by Martin Wheatcroft FCA. Design by Sunday. Sources: Ofgem, Cornwall Insight. Typical electricity and gas usage 2,900kWh and 12,000KWh to 2023 Q4 and 2,700kWh and 11,500kWh from 2024 Q1.

According to Ofgem, the domestic energy price cap in Great Britain for the third quarter of 2025 commencing on 1 July is £1,720 per year. This is a 7% reduction from the £1,849 per year price cap in the previous quarter, based on typical energy usage of 2,700kWh of electricity per year and 11,500kWh of gas per year.

The above statement may be confusing because the amounts quoted are not what is capped and the price cap only lasts for a quarter rather than a year. 

There is, however, a method to Ofgem’s madness. There are actually 252 price caps set by Ofgem each quarter that it distils into one headline number, being the average of fourteen regional prices for a dual-fuel standard credit user multiplied by typical annual usage plus the 5% VAT that is payable on domestic energy supplies. 

This single annualised number makes it much easier to communicate what is happening to energy prices and also avoids getting into the complications of seasonal variations in energy usage during the course of each year.

The 252 price caps comprise two caps – a maximum per kWh price and a maximum daily standard charge – for each of three different types of users (single-rate users of electricity, multi-rate ‘Economy 7’ users of electricity and users of gas), multiplied by three different categories of customers (standard credit, direct debit and prepayment meters), and then multiplied by 14 regional variations

The headline price cap is not the maximum that households will pay in a year, nor should you divide by four to guess at the amount payable for that individual quarter. Those paying by direct debit or using prepayment meters (since July 2023, previously prepayment customers paid more) are capped at 7% and 10% on average less than standard credit users based on typical usage, while maximum prices and standing charges also vary by region. Larger homes are likely to use much more energy and so pay a lot more, while smaller homes are likely to pay less. 

Meanwhile, energy suppliers have started to offer annual or longer fixed-rate deals again, typically at a discount to the current maximum prices but with the price protection that such deals offer offset by the risk that the fixed-rate in the deal could exceed the price cap in subsequent quarters if prices go down.

As my chart this week illustrates, the annual price cap peaked at £4,279 in the first quarter of 2023, based on average maximum standing charges of £272 per year for both electricity and gas meters, plus 2,900kWh of electricity at 67.47p and 12,000kWh of gas at 17.08p. The price cap fell to £3,280 in the second quarter (£300 standing charges, 50.60p/kWh for electricity and 12.61p/kWh for gas), £2,074 in the third quarter (£300, 30.11p/kWh and 7.51p/kWh) and £1,923 in the fourth quarter of 2023 (£303, 27.35p/kWh and 6.89p/kWh).

Ofgem changed its estimate of typical annual usage to 2,700kWh in electricity and 11,500kWh in gas from the first quarter of 2024, so the £1,928 headline price cap was actually a 3% increase compared with the previous quarter once the change is adjusted for. The price cap fell to £1,690 in the second quarter (£333 standing charges, 24.50p/kWh for electricity and 6.04p/kWh for gas) and £1,568 in the third quarter (£334, 22.36p/kWh and 5.48p/kWh) before rising to £1,179 in the fourth quarter of 2024 (£339, 24.50p/kWh and 6.24p/kWh).

Prices rose in the first quarter of 2025 to £1,738 (£338 standing charges, 24.86p/kWh for electricity and 6.34p/kWh for gas) and £1,849 in the second quarter (£315, 27.03p and 6.99p) before falling to £1,720 in the current quarter that commenced on 1 July and ends on 30 September 2025 (£297, 25.73p/kWh and 6.33p/kWh).

Cornwall Insight projects that the price cap could fall slightly to £1,698 in the fourth quarter (£299 standing charges, 26.17p/kWh and 6.02p/kWh) based on data up to 29 June 2025. However, this could easily change depending on what happens to wholesale prices over the next month and a half before Ofgem sets the next quarterly price cap on 27 August 2025.

Despite the significant fall in energy prices from their peak in the first quarter of 2023, the cap continues to be much higher than it was before the pandemic and the cost-of living crisis. After adjusting for consumer price inflation and changes in estimated typical usage, the £1,720 per year price cap in the current quarter is approximately 26% higher than the original price cap of £1,137 in the first quarter of 2019 (not shown in the chart, based on £177 a year in standing charges, 16.52p/kWh x 3,100kWh typical annual usage of electricity and 3.73p/kWh x 12,000kWh of gas).

While it is positive that energy prices appear to have stabilised at around the current level over the past couple of years, there continue to be significant geopolitical risks that mean that prices could rise significantly in some specific scenarios.

Time to keep our fingers crossed and hope those risks don’t materialise

This chart was originally published by ICAEW.

ICAEW chart of the week: Energy price cap update

My weekly chart for ICAEW returns for a less than cheerful update on the energy price cap, highlighting how the massive 54% price rise back in April pales into insignificance in comparison with the recently announced 80% rise in October and the prospect of further big rises in the first half of 2023.

Column chart showing historical price caps for Q4 2020-Q1 2021, Q2-Q3 2021, Q4 2021-Q1 2022, Q2-Q3 2022, the recently announced price cap for Q4 2022, and industry forecasts for Q1, Q2, Q3 and Q4 2023.

Average typical price cap: £1,042, £1,138, £1,277, £1,971, £3,549 (Q4 2022), £5,390, £6,620, £5,590, £5,890.

Gas price/kWh: 3.0p, 3.3p, 4.1p, 7.4p, 14.8p (Q4 2022), 23.2p, 30.8p. 27.9p, £27.8p.

Electricity price/kWh: 17.2p, 19.0p, 20.8p, 28.3p, 51.9pm (Q4 2022), 80.5p, 91.8p, 78.3p, 79.8p.

Standing charge: £184, £188, £186, £265, £273 (Q4 2022), £275, £280, £280, £259.

Sources: Ofgem, Cornwall Insights, ICAEW calculations. Average direct debit prices based on 'typical' annual household usage of 2,900 kWh of electricity and 12,000kWh of gas.

My chart this week is on Ofgem’s cap on domestic electricity and gas prices, which increased from an annual average of £1,042 back in October 2020 for a ‘typical’ household using 2,900kWh of electricity and 12,000kWh of gas paying by direct debit, to £1,138 in April 2021, £1,277 in October 2021 and £1,971 in April this year.

Unless the new prime minister intervenes, the energy price cap will rise to £3,549 on 1 October, significantly more than was anticipated in our chart back in January on this topic . Divided by 12, this gives a monthly average bill of £296 (compared with £164 currently and £106 last winter), although as energy usage in winter is higher for most households the £400 or £66 per month rebate between October 2022 and April 2023 announced by the government earlier this year will not go very far.

The change to quarterly price caps from 2023 onwards means that households face a further rise in January, making the winter even more expensive given that research from Cornwall Insight suggests energy prices will continue to rise, to a likely cap of in the region of £5,390 on 1 January 2023 and potentially to as much as £6,620 on 1 April 2023, before falling to £5,900 on 1 July and £5,890 on 1 October 2023.

The energy price cap is technically a series of regional caps on the price per kilowatt-hour (kWh) for electricity and gas, and on the daily standing charge payable by domestic users. Larger or less energy-efficient households using more electricity or gas will pay a lot more than the amounts shown here, while smaller and more energy-efficient households will pay less. There are higher prices for those using prepayment meters (£3,608 from 1 October) and those paying by cash or cheque (£3,764 from 1 October).

The chart illustrates how the average annual standing charge was £184 in Q4 2020 and Q1 2021, £188 in Q2 and Q3 2021, £186 in Q4 2021 and Q1 2022 and £265 in the current price cap, the large increase principally to cover the costs of dealing with the 40 or so energy suppliers that went bust over the past year. The average standing charge will increase to £273 in October and then is expected to stabilise at around that level, potentially at £275, £280, £280, and £250 respectively for the four quarters in 2023, although this depends on how Ofgem chooses to allocate the costs that make up the cap between fixed and variable elements in the pricing structure.

The average per kWh price for electricity has increased from 17.2p (Oct 2020-Mar 2021) to 19.0p (Apr-Sep 2021) to 20.8p (Oct 2021-Mar 2020) to 28.3p currently and will rise to 51.9p in October. If Cornwall Insight’s predictions come to fruition, the price is likely to rise to somewhere around 80.5p per kWh in January and potentially to 91.8p in April, before falling to 78.3p in July and rising slightly to 79.8p in October 2023. The potential peak of 91.8p is more than five times the level back in October 2020 and is likely to be an even higher multiple for the many households who were on fixed price deals that were often significantly below the level of the price cap.

The average per kWh price for gas has increased from 3.0p (Oct 2020-Mar 2021) to 3.3p (Apr-Sep 2021) to 4.1p (Oct 2021-Mar 2020) to 7.4p currently and will rise to 14.8p in October. The gas price is likely to rise to 23.2p per kWh in January and potentially to 30.8p in April, followed by 27.9p and 27.8p in the final two quarters of 2023. The possible peak of 30.8p would be more than 10 times the level of 3.0p back in October 2020.

The price cap about to come into force of £3,549 is based on annually equivalent wholesale energy costs of £2,491, network costs of £372, operating costs of £214, social and environmental contributions of £152, other costs of £88 and a profit margin of £63, before adding on £169 of VAT at a rate of 5%. These are equivalent to £208, £31, £18, £13, £7, £5, and £14 in a ‘typical’ bill of £296 per month.

The sheer scale of these price rises will make energy unaffordable for millions of families across the UK at the same time as many other prices are rising sharply. This will mean real hardship for those on low and middle incomes without significant additional financial support from government, whether in the form of extra rebates on energy price rises or support through the benefit system. Other options include reforming the pricing mechanism for electricity generated by non-gas sources such as renewables or providing the energy suppliers with a long-term borrowing facility to enable the expected price rises to be spread out over a number of years.

Either way, the incoming prime minister faces some very difficult choices in how to respond, not only to the cost-of-living crisis but also to an emerging cost-of-doing-business crisis that could see many businesses forced to close as their energy prices (not covered by the domestic price cap) become unsustainable.

In January, I said: “There may be trouble ahead.” Unfortunately for all of us, trouble has arrived.

This chart was originally published by ICAEW.