Over half of households are still on pricey standard variable energy tariffs, including as many as 71% of SSE customers and an increasing proportion of those with some firms outside the big six.
The rate at which household bills and expenses are increasing has slowed in the last month, according to the latest MSE Bills Tracker figures, with average costs up 2% over the past 12 months.
Not knowing whether the cheapest energy firms are "any good" is the most common reason householders are reluctant to switch energy supplier , according to a poll of 3,500 MoneySavers.
Northern Ireland's largest energy supplier Power NI is to hike electricity prices by 5.6%, meaning the typical bill for those on its standard tariff will jump by £27/year.
About three million households on prepayment meters are set to see their energy bills drop after regulator Ofgem said it would tighten a price cap imposed earlier this year.
British Gas has finally revealed its worst kept secret by announcing a 12.5% rise in electricity prices, with bills for a typical dual-fuel household on its standard tariff set to jump by £76 to £1,120 per year.