The regulator said it has strengthened its code of conduct to require sites, previously allowed to display only a partial view of tariffs from suppliers paying commission, to show all available tariffs.
Under the revised code, sites must avoid “confusing” jargon and phrase each choice so that it is easy for customers to understand.
Sites must also make it clear they earn commission on certain tariffs and list which energy companies they have commission arrangements with.
Ofgem senior partner Rachel Fletcher claimed that “consumers can make savings of around £200 by switching suppliers” and these market reforms have “made it easier for consumers to pick out better deals”.
If a site wants to continue to exhibit the Confidence Code logo, it must abide by these new rules from before the code goes live at the end of March, or Ofgem will withdraw its accreditation.
Ofgem said it will continue to review the code to “make sure it carries on providing a high level of consumer protection”.