Which? uses cookies to improve our sites and by continuing you agree to our cookies policy

Is your energy deal about to go up?

See if your fixed term deal is ending this month


Switch to a cheaper tariff when your fixed deal comes to an end to keep costs low

Customers with fixed energy deals ending in August could see their bills rise by as much as £318. British Gas, EDF, First Utility, Npower and Sainsbury’s all have fixed tariffs ending this month – find out if yours is one of them.

If you signed onto a fixed energy deal that’s due to finish in August, you’ll be moved onto the standard tariff by default unless you switch to a new deal. 

We’ve rounded up the energy deals that are ending this month, so you can find out how much more you’ll pay for energy if you don’t switch. We also reveal the current top five cheapest deals – they all come in at £900 and under.

Find out if you could save by switching – head over to Which? Switch now to compare energy deals.

Fixed energy deals ending in August

The table below shows fixed term deals that are due to finish at the end of this month. 

We’ve included all the deals where you will end up paying more if you don’t switch and are automatically reverted to the standard tariff, and have shown how much extra you can expect to pay on average.

The figures below are based on average billing across the UK, but depending on where you live in the country, you could be even harder hit. Customers in the North West on First Utility’s iSave Fixed August 2015 (v23) tariff could see up to a £318 increase when their fixed term comes to an end.

Fixed deals ending in August
  Tariff Average price Standard tariff Average price increase
British Gas logo British Gas Fixed Price August 2015 £1085 £1156 £71
EDF EDF Energy Blue+Price Promise August 2015 (paperless) £1049 £1155 £106
First Utility Logo First Utility iSave Fixed August 2015 (v23) (paperless) £992 £1135 £142
npower logo Npower Price Fix August 2015 (paperless) £1119 £1169 £50
sainsburys energy logo Sainsbury’s Energy Fixed Price August 2015 £1075 £1156 £82

Table notes: The prices given in the table above are based on a dual fuel tariff for a UK household with average consumption, paying by direct debit. Exact prices can vary according to region, usage and payment method.

Save money

Fixed deals ending aren’t necessarily bad news for everyone. Customers currently on British Gas Fix and Control August 2015, Flow Energy Thames Online Fixed September 2015 (paperless), and Sainsbury’s Energy Fix and Reward August 2015 are all likely to see a decrease in their bills when they’re reverted to the standard tariff.

However, you’d still save money by switching to the cheapest energy deal on the market – GB Energy Supply’s Premium Energy Saver at £870 – than the standard tariff for any of the companies listed above. 

In fact, you’re guaranteed to save money by choosing any of the top five deals listed below instead of any of the big six energy suppliers’ standard tariffs. The current cheapest deal from GB Energy Supply is nearly £300 cheaper than the most expensive standard tariff from Npower. 

Compare and switch suppliers

Choose the fuel type
to compare:

Gas and electricity Electricity
Gas only

Top five cheapest energy deals

Here are the top five cheapest widely available dual fuel tariffs. They all come at £900 and under:

  1. £870 GB Energy Supply – Premium Energy Saver
  2. £885 First Utility – Energylink Collective Switch October 2015
  3. £889 Extra Energy – Fresh Fixed Price Nov 2016 v3 (paperless)
  4. £890 First Utility – iSave Fixed October 2016 v2 (paperless)
  5. £900 Extra Energy – Bright Fixed Price Nov 2016 v2 (paperless)

Although we know price is important, it’s also a good idea to know a bit about an energy company before switching to it.

We’ve rated 22 leading energy firms so we can tell you everything you need to know about the kind of service they’ll deliver and what their customers think of them. Find out which companies you can trust, and which to avoid, by visiting our energy company reviews.

(All prices from above are from Energylinx, based on the details of a dual fuel medium user [13,500kWh of gas and 3,200kWh of electricity a year] paying by monthly direct debit and choosing paperless billing. Prices are averaged across all regions and correct as of 26 August 2015.)

More on this…

Back to top