The Telegraph formerly discovered that some corporations had been giving preset offers of far more than £3,000 for each calendar year.
By contrast, the cap is only updated each 6 months, indicating it has lagged guiding the current market value rises.
This has saved the selling price of normal variable tariffs – capped at £1,277 for a standard home currently – artificially small and shielded households from the cost rises for the moment.
Even so, analysts hope bills to increase by far more than 50laptop when the cost cap is current in April.
Martin Younger, an strength analyst at Investec, has predicted the restrict could boost to as considerably as £2,000 – a much more than £700 enhance on the recent limit – even though he has far more lately revised that estimate to £1,900.