Households will be hit with a £152 increase to their annual energy bills at the end of the month unless they switch providers, as several fixed tariffs come to an end.
Of the 17 fixed deals that expire on Saturday 30 April, 11 will result in customers being automatically switched to a more expensive standard variable tariff, according to data from comparison site Gocompare.com.
While the average increase is £152, Scottish Power customers on the Online Fixed Saver April 2016 tariff will experience a whopping 25.5 per cent rise of £219.57 to their annual energy bills if they are rolled on to the company's standard variable tariff at the end of the month.
The figures are based on a medium-level user in the UK, consuming 3,100 kWh of electricity and 12,500 kWh of gas per year.
There are some cases where the current fixed deal is more expensive than the supplier's standard variable tariff, which means the customer will see a reduction in their annual bill. However, this tends to be an average drop of 3.1 per cent or £32.78, which is far less than the £207 that Gocompare.com claims they can save each year by switching provider.
Ben Wilson, energy spokesperson at Gocompare.com, said: “The spring time, and the warmer weather that comes with it, tends to be the time of the year where people start switching off their heating and stop thinking about their energy bills.
“While it’s easy to put your energy usage to the back of your mind when it’s at its lowest, not keeping on top of when your fixed tariff expires can be a costly mistake, with an average rise of £152 at the end of the month.
“You don’t need to be energy expert to switch supplier, or even know exactly how much you use each month and it only takes a few minutes online to see if you could get a better deal on your energy. On average, people who switch supplier could save up to £207 a year, which could pay for a long weekend to escape the April showers.”
The UK government has been encouraging people to switch energy suppliers to find the cheapest deals, following intense public pressure to make the energy market fairer and more competitive. The cost of energy hit the headlines in late 2013 when former Labour leader Ed Miliband vowed to freeze energy prices, which the industry argued would drastically stymie much-needed investment into the sector.
The tarriffs coming to an end
|Supplier||Tariff||How much more you'll pay|
|Co-operative Energy||Fixed Price April 2016||£93.27 (9.37%)|
|Co-operative Energy||Fixed Price April 2016 Paper Billing||£93.27 (9.37%)|
|Co-operative Energy||Fixed Price April 2016 v2 Paper Billing||£139.84 (14.73%)|
|Co-operative Energy||Fixed Price April 2016 v2||£139.84 (14.73%)|
|EDF Energy||Blue+ Price Promise April 2016||£77.80 (7.85%)|
|Extra Energy||Variable Price v1||£243.22 (27.44%)|
|First:Utility||iSave Fixed v16 April 2016||-£8.99 (-0.85%)|
|First:Utility||iSave Fixed April 2016||£169.11 (19.27%)|
|Npower||Online Price Fix April 2016||-£25.00 (-2.27%)|
|Npower||Fixed Energy Online April 2016||£161.04 (17.58%)|
|Sainsbury's Energy||Fixed Price April 2016||-£40.28 (-3.86%)|
|Sainsbury's Energy||Fix & Reward April 2016||-£6.91 (-0.66%)|
|Sainsbury's Energy||SE Fixed Price April 2016||£156.60 (15.0%)|
|Scottish Power||Fixed Price Energy April 2016||-£63.00 (-5.51%)|
|Scottish Power||Fixed Price Energy April 2016 Online||-£52.50 (-4.63%)|
|Scottish Power||Online Fixed Price Energy April 2016||£176.14 (19.48%)|
|Scottish Power||Online Fixed Saver April 2016||£219.57 (25.50%|