Retail market monitoring

To increase transparency and improve trust, we publish a wide range of information on the retail energy markets and how they are working. Select from the below:

Retail market indicators

A suite of data covering market structure, prices and profits, and consumer engagement, which are updated on a regular basis throughout the year.

Go to Ofgem Retail market Indicators

Retail energy market report 

Our annual detailed commentary on recent trends in the retail markets.

Go to Retail energy market report 2016

Consumer research

Our ongoing programme of research used to inform our market monitoring and policy work.

Go to Consumer research

Consolidated Segmental Statements

Every year, we require suppliers to publish information on their costs, revenues and profits as part of their consolidated segmental statements, or CSS.

Go to Understanding the profits of the big energy suppliers 

Supplier Cost Index

We publish regular estimates of the trends in suppliers expected costs, to help improve transparency around what is driving the latest trends in prices.

Go to Understanding trends in energy prices: Supplier Cost Index 

Typical Domestic Consumption Values

Representative usage values consumers can use to more easily compare between supplier tariffs on a like-for-like basis.

Go to Typical domestic consumption values

Further market data

You can find a wider collection of data and indicators we publish in our monitoring of the market, including across wholesale energy markets and customer service in the Ofgem Data Portal.

Publications and updates

  • Published: 11th Oct 2018
  • Reports and plans
  • 3 Associated documents
In our second annual State of the Energy Market report, we assess how well energy markets are working for consumers.

  • Published: 1st Nov 2017
  • Main webpage
  • 0 Associated documents
Ofgem's Chief Economist, Joe Perkins, introduces the key findings of our State of the Energy Market 2017 report.

  • Published: 31st Oct 2017
  • Reports and plans
  • 2 Associated documents
Ofgem's evidence-based assessment of the issues affecting the GB energy markets and its performance for consumers in 2017.

  • Published: 3rd Aug 2016
  • Reports and plans
  • 1 Associated documents
Ofgem's annual update on the GB retail energy market: The main trends for 2015/16 and contribution to the outcomes we want for consumers.

  • Published: 9th Sep 2015
  • Reports and plans
  • 1 Associated documents
Ofgem's annual update on the GB retail energy market. It shows the main trends in the retail market in the last year, including how the markets are contributing to the outcomes we want for consumers.