Domestic energy supplier performance data

Energy supplier rating

In December 2016 we launched our quarterly energy supplier rating, which incorporates complaints handling data alongside other performance measures.
We also publish a record of data from previous releases of the rating [ 0.6 mb]. Please note that the methodology for the rating was changed from Q3 2020 onwards. 

Complaints data

Between 2012 and 2016, Citizens Advice (and its predecessor consumer body, Consumer Futures) published a quarterly complaints handling league table [ 430 kb] which compared how domestic energy suppliers rank on handling complaints from best to worst.
The complaints handling league table has now been replaced by our energy supplier rating. We keep a record of data from the complaints league table, and update it with quarterly complaints handling data from the star rating.