Supplier Performance Report (SPR)

Our Supplier Performance Report holds energy suppliers to account for their performance delivering the low-carbon energy and social schemes we administer on behalf of the government. The Supplier Performance Report does not report on a supplier’s customer service, wider performance (for example against other regulatory obligations), or its energy mix.

The schemes that Ofgem administers on behalf of the government are helping to decarbonise our energy system and support some of the most vulnerable members of society. Energy suppliers play a critical role in delivering many of these schemes. Therefore, to ensure the schemes are run as effectively as possible, we monitor supplier performance closely. When suppliers fail to meet their obligations or demonstrate poor performance, we publish these details every 6 months in Supplier Performance Reports, which can be found at the bottom of this page. 

We take poor performance seriously because when suppliers fail to meet their scheme obligations it can: 

• add extra costs for energy consumers and taxpayers
• undermine the positive benefits of the scheme for consumers and the environment
• compromise effective scheme administration

Low-carbon energy and social schemes covered in the Supplier Performance Report

• Energy Company Obligation (ECO)
• Feed-in Tariffs (FIT)
• Great British Insulation Scheme (GBIS)
• Green Gas Levy (GGL)
• Offtaker of Last Resort (OLR)
• Renewables Obligation (RO)
• Smart Export Guarantee (SEG)
• Warm Home Discount (WHD)

The Supplier Performance Report contributes to Ofgem’s principal objectives by bringing transparency to energy supplier performance and showing how we are working hard to improve standards for consumers across the energy market. 

Incidents from July 2023 to June 2025

We categorise incidents of non-compliance as Major incidents or Minor incidents. 

The charts below highlight the suppliers with the most major and minor incidents recorded over the 2-year period July 2023 to June 2025. Further details can be found in our latest edition of the Supplier Performance Report. 

These suppliers have all failed to meet their obligations and our expectations. The performance of these suppliers is not good enough and they must do better. It is a supplier's responsibility to ensure they meet all their obligations on time and in full, and they may face serious consequences, which could include escalation to enforcement, if they don’t. 

What is a Major incident?

These are the most serious incidents of non-compliance and have the greatest potential negative impact. 

This can include the failure of an energy supplier to:

• make a scheme payment
• meet a scheme payment deadline
• meet a scheme obligation target
• provide critical scheme data on time 

What is a Minor incident?

These are lower-level incidents of non-compliance. When a supplier is responsible for a high number of minor incidents, this can be an indication of poor governance. This can impact scheme delivery, create an unnecessary administrative burden, and lead to poor outcomes for consumers.