First Utility believes consumers are paying too much for broadband services as providers are not telling them when introductory rates end.
According to Ed Kamm, Head of Commercial at the company, "large swathes" of households are paying over the odds for both telecoms services and energy.
This, he stated, is because customers are often not being told when the teaser rates they have enjoyed since signing up expire.
Speaking to City A.M, he said broadband in particular is "lagging behind many sectors and proving to be among the worst industries for customer communication".
"It’s about time it caught up and formalised the process of communicating out-of-contract plans with customers," Mr Kamm added.
This comes after Citizens Advice warned that loyal broadband customers are paying a swingeing premium for sticking with their provider after introductory rates end.
Figures showed that the prices of the cheapest broadband deals go up by £113 a year - or 43 per cent - on average after their initial low-cost teaser rate comes to an end.