The company will not increase its residential standard energy prices until at least April 2017.
The freeze follows large supplier’s SSE and British Gas and independent supplier Good Energy, which have all committed not to raise prices.
A spokesman for Eon said: “We have been working hard behind the scenes to make sure we could make a commitment to our customers before Christmas that we would not increase our residential standard energy prices until at least after winter.
“We are pleased to be able to offer that reassurance to our customers. Therefore, there will be no change to E.ON’s residential standard prices until at least April 2017. We will continue to engage our customers on a wide range of topics including making them aware of their different tariff choices, helping them to use no more energy than they need and getting Smart meters into homes across Britain.”
This week, Eon was also named large supplier of the year for 2017 by Uswitch for scoring a rating of 79 per cent on customer satisfaction.