Retail market indicators

In our monitoring of the retail energy market for gas and electricity, we collect and analyse a vast range of data. Our retail market indicators give a snapshot of this monitoring. They draw from a comprehensive framework which underpins our ongoing monitoring, including our annual update on the retail energy markets in Great Britain. You can view these updates in the related publications section below. 

These market indicators and data are not intended for use or to be relied on for any commercial purposes. View copyright and disclaimer.

If you have feedback on the indicators, please contact us.

There were 21 active suppliers in the domestic gas and electricity retail markets as of March 2025. This consisted of 18 suppliers active in both gas and electricity, 1 in gas and 2 in electricity, with no exits and entries in the during the first quarter of 2025. 

During 2024 the number of suppliers remained same at 21 due to no new entries and exits. In 2025, during the first quarter no exit-entries have been identified and therefore the total number of suppliers as of March 2025 remain at 21. 

In June 2025, wholesale prices fluctuated throughout the month. After marginal changes during the first week, day ahead power prices increased from the second week of the month, reflecting low wind generation, increase in UK carbon prices and some reduced nuclear. Towards the end of the month, power prices declined again driven by strong wind output. Gas prices remained relatively stable during the first half of the month, and rose in the third week, driven by escalating tensions in the Middle East. Gas prices declined again towards the end of the month, driven by Iran–Israel ceasefire, surging Norwegian supply and increasing European storage levels.  

 For more detailed updates on wholesale prices visit Wholesale market indicators | Ofgem. 

In June 2025, the number of new fixed tariffs on offer increased compared to May 2025. Around 85% of these offers were available to the whole market, rather than exclusive to specific customers, with the majority of prices lower than the price cap for 1 April to 30 June 2025. The average fixed tariff was priced at £1,666 in June 2025, £32 higher than in the previous month. 

In June 2025, the average price of SVTs with large legacy suppliers for a typical dual fuel customer paying with direct debit remained constant at £1,849 in June 2025, which is aligned with the price cap for the period 1 April to 30 June 2025. The market cheapest tariff increased from £1,517 in May 2025 to £1,546 in June 2025, and the cheapest tariff basket increased from £1,600 in May 2025 to £1,620 in June 2025. See the methodology for information on how the cheapest tariff basket is calculated.  

The update of all profit and average bill indicators based on Consolidated Segmental Statements (CSS) has been paused. Only three large domestic legacy suppliers (British Gas, EDF and Scottish Power) and one non-domestic supplier (SSE) had submitted a CSS under existing regulation. This information is insufficient to generate market representative statistics. A review of the CSS obligation is now completed and will expand CSS reporting to most of the domestic and non-domestic market. This will apply to supplier financial accounts for 2023 onwards with publication 10 months after the company’s financial year end. We intend to resume the publication of these indicators as soon as new data becomes available. Read Reviewing the Consolidated Segmental Statements – our decision for more information.

The Market Stabilisation Charge was a temporary measure in place from 14 April 2022 to 31 March 2024 which required all domestic suppliers acquiring a domestic customer to pay a charge to the losing supplier when wholesale prices fell considerably below the relevant wholesale price cap index. For more information about the MSC read -  Market Stabilisation Charge dashboard. 

In May 2025, the total number of switches saw circa 14% decrease in both fuels from April to May 2025; the number of electricity switches went from 277,094 in April 2025 to 240,401 in May 2025. Gas switches went from 217,158 in April 2025 to 185,300 in May 2025. 

The proportion of net gains switching away from the large legacy supplier was around 14% in May 2025, continuing to reflect mainly customers moving towards other large and medium suppliers.

Suppliers’ Customer Credit Balances (CCBs) are an important aspect of the retail energy market, and this is reflected in licence obligations in relation to both consumer standards and supplier financial resilience.

The data below reflects Ofgem's chosen policy measure. This is for Fixed Direct Debit domestic customers.  This focuses the analysis on how households are impacted by CCBs. We have ‘netted off unbilled consumption’ meaning that energy you have paid for but not used does not feature. Finally, as Customer credit balances are seasonal (they rise in summer months and are then spent in colder winter months) we have included the yearly average to disaggregate the seasonal variation from its underlying trend.

These figures reflect households that are in credit, the values are true as of the last day of each calendar quarter (31^st March, 30^th June, 30^th September 31^st December).

Finally, the use of quartiles may be impacted as usage changes in the future, which would need to be reviewed and recognised.

This data is published by the end of March, June, September and December each year.  For further information see customer credit balances explanatory note.

We have selected this range of indicators to support general understanding of the market, including how they contribute to the key priorities outlined in our strategic narrative. We also aim to provide a picture of the market where it is not produced elsewhere, or where there is scope for us to set a clear methodology for the data.

Our data comes from sources that are either publicly available, provided by third parties or from responses to Ofgem information requests. Specific sources and relevant dates are listed with each indicator. We are grateful to third parties for allowing us to reproduce their data. 

Most of these indicators will be updated quarterly while still allowing access to historic information. Updates will depend on the availability of data for an indicator. 

We will review the indicators periodically to ensure they continue to help promote transparency and understanding of the retail energy market and as additional sources of information become available.