How does your non-domestic supplier stack up?
Our new non-domestic energy supplier performance league table compares how energy companies rank on handling complaints from best to worst.
This should help you understand how your current provider performs and make decisions about switching.
Energy supplier performance from January to March 2025
Table showing rankings for energy supplier performance, published June 2025.
Rank | Supplier | Apr-Jun 2025 | Jan-Mar 2025 |
---|---|---|---|
Rank
1 |
Supplier
Crown Gas and Power |
Apr-Jun 2025
5.7 |
Jan-Mar 2025
0.0 |
Rank
2 |
Supplier
Ecotricity |
Apr-Jun 2025
23.8 |
Jan-Mar 2025
100.3 |
Rank
3 |
Supplier
Tomato |
Apr-Jun 2025
81.5 |
Jan-Mar 2025
134.3 |
Rank
4 |
Supplier
E.on |
Apr-Jun 2025
108.6 |
Jan-Mar 2025
106.9 |
Rank
5 |
Supplier
Total Gas and Power |
Apr-Jun 2025
148.8 |
Jan-Mar 2025
114.8 |
Rank
6 |
Supplier
British Gas |
Apr-Jun 2025
156.0 |
Jan-Mar 2025
194.4 |
Rank
7 |
Supplier
Octopus Energy |
Apr-Jun 2025
167.3 |
Jan-Mar 2025
294.1 |
Rank
8 |
Supplier
Scottish Power |
Apr-Jun 2025
230.5 |
Jan-Mar 2025
281.6 |
Rank
9 |
Supplier
EDF |
Apr-Jun 2025
293.5 |
Jan-Mar 2025
294.9 |
Rank
10 |
Supplier
Ruby Energy |
Apr-Jun 2025
330.4 |
Jan-Mar 2025
234.5 |
Rank
11 |
Supplier
SmartestEnergy Business |
Apr-Jun 2025
396.1 |
Jan-Mar 2025
440.6 |
Rank
12 |
Supplier
SSE |
Apr-Jun 2025
470.4 |
Jan-Mar 2025
597.6 |
Rank
13 |
Supplier
Yu Energy |
Apr-Jun 2025
499.4 |
Jan-Mar 2025
320.5 |
Rank
14 |
Supplier
Pozitive Energy |
Apr-Jun 2025
558.5 |
Jan-Mar 2025
484.2 |
Rank
15 |
Supplier
Corona Energy |
Apr-Jun 2025
562.3 |
Jan-Mar 2025
451.0 |
Rank
16 |
Supplier
Engie |
Apr-Jun 2025
1193.3 |
Jan-Mar 2025
1373.3 |
Rank
17 |
Supplier
Maxen Power |
Apr-Jun 2025
2282.4 |
Jan-Mar 2025
2275.0 |
** Suppliers marked with this sign are new entrants to the non-domestic league table as of January 2025.
Citizens Advice has a statutory remit to publish the energy supplier performance data. Citizens Advice took over this role on 1 April 2014 when Consumer Futures became part of Citizens Advice and Citizens Advice Scotland. In May 2015 we consulted with suppliers regarding a similar process for the non domestic market and following some testing, we published the first comparison in January 2017.
You can download a copy of past energy supplier performance statistics. 162 KB
Weightings
Methodology
Citizens Advice has a statutory remit to publish the energy supplier performance data. Citizens Advice took over this role on 1 April 2014 when Consumer Futures became part of Citizens Advice and Citizens Advice Scotland. In May 2015 we consulted with suppliers regarding a similar process for the non domestic market and following some testing, we published the first comparison in January 2017.
The performance model represents weighted complaints made to the independent bodies, who are Citizens Advice Consumer Service, The Extra Help Unit, and Ombudsman Services:Energy
Weightings have been allocated to reflect the seriousness of the complaint and the time and effort spent by the consumer to get their problem resolved. The weightings in the model place greater emphasis on situations where the consumer has had to repeatedly contact their supplier, or another agency, because the company had failed to deal with their problem. The measures used in the model are outlined below along with their weightings.
Case type | Definition | Weighting |
---|---|---|
Case type
Citizens Advice Consumer Service advice only / company referral cases |
Definition
These are cases where a consumer has: sought independent advice or help (not information) from Citizens Advice Consumer Service. (Please note that due to data protection issues it is not possible for suppliers to have full visibility of these cases.) Or Been referred to the supplier via the company referral process. |
Weighting
10 |
Case type
Complaints received by Extra Help Unit* |
Definition
These are complaints from vulnerable consumers that have been referred from Citizens Advice consumer service to the Extra Help Unit (EHU) where a consumer who is vulnerable, has been disconnected or is at risk of disconnection or needs support due to the complexity of the case and has previously tried to resolve their complaint with their supplier and has been unable to do so. |
Weighting
25 |
Case type
Cases received by Ombudsman Services: Energy |
Definition
These are cases accepted by Ombudsman Services: Energy, the industry alternative dispute resolution scheme, because the consumer has been unable to get their complaint resolved for more than eight weeks. |
Weighting
30 |
Calculation of ratios
The number of non-domestic cases received about each company in each of the categories are multiplied by the weighting factor and then divided by each company’s number of non-domestic customers. (Customer numbers provided by suppliers as part of a recurring request for information)
The figure is then multiplied by 10,000 to give a ratio per 10,000 customers.
The total measures for each company are then combined to produce an overall ratio. The ratios are produced on a quarterly basis.
Notes
SSE data includes Atlantic, Scottish Hydro Electric, Southern Electric, SWALEC, and Unicom
Consumer Futures created a proxy for performance based on the number of consumers that have contacted an independent organisation for advice or support with an energy problem. The companies have been ranked on the number of customer contacts to Citizens Advice consumer service, The Extra Help Unit and the Energy Ombudsman in relation to their market share during the last quarter.
You can check details of the consultation and check the decision document.
The different types of complaint have been weighted to reflect the seriousness of the complaint and the time and effort spent by the consumer to get their problem resolved. See the methodology section for full details of the model.
Footnotes
*On 1 April 2014, the Extra Help Unit became part of Citizens Advice Scotland. The team is based in Glasgow but provides a GB wide service.