Finding the cheapest energy supplier

How cheap do energy suppliers get? The key to making the right electricity and gas choice.

Know what you want

Saving money is important but it is not the only criterion for choosing your energy supplier. Other criteria, such as whether you want a fixed-rate or variable-price plan, how green you want your energy to be, whether or not you are prepared to manage your account online, etc., should also be considered.

Read the fine print

Cheap energy suppliers sometimes hide certain fees. Early exit fees, for example, can rise up to £50 per fuel, which might add £100 to your yearly energy bill if you decide to switch before the end of a fixed-rate energy plan.

Average prices

Here are June 2014 average annual energy costs for the average UK energy electricity (3,200 kWh/year) and gas (13,500 kWh/year) consumption.

  • First:Utility stands out as the cheapest energy supplier (one-year fixed plan).
  • EDF Energy is the cheapest Big Six supplier.
  • Spark Energy is the cheapest supplier with a variable tariff.
  • Green Star Energy is the cheapest supplier with a two-year fixed tariff.
  • Ovo Energy is the cheapest green supplier.
  • Green Star Energy is the cheapest supplier with a three-year fixed tariff.
Supplier Tariff name Tariff type Estimated annual cost (GBP)
First Utility logo iSave Fixed August 2015 Fixed 1 year 2 months 993
Extra Energy logo Fixed Price September 2015 Fixed 1 year 3 months 1010
Flow Energy logo Thames Online Fixed September 2015 Fixed 1 year 2 months 1024
Ovo Energy logo Cheaper Energy Fixed (One Year) Fixed 1 year 1029
Green Star Energy logo No Worries 12 Months Fixed Fixed 1 year 1035
EDF Energy Logo Blue+Price Promise August 2015 Fixed 1 year 2 months 1049
Spark Energy logo Direct Debit Advance 4 Variable 1063
Green Star Energy logo No Worries 24 Months Fixed Fixed 2 years 1068
First Utility logo iSave Fixed September 2016 Fixed 2 years 3 months 1073
Sainsbury's Energy logo Fixed Price August 2015 Fixed 1 year 2 months 1076
Scottish Power logo Online Fixed Price Energy July 2015 FIxed 1 year 1 month 1076
British Gas Logo Fixed Price August 2015 Fixed 1 year 2 months 1085
Ovo Energy logo Greener Energy Fixed Online (1 Year) Fixed 1 year 1088
Ovo Energy logo Better Energy Fixed (1 Year) Fixed 1 year 1089
Woodland Trust Energy logo Better Energy Fixed 1 year 1089
SSE logo 1 Year Fixed Price Fixed 1 year 1092
Green Star Energy logo No Worries Variable Variable 1097
Scottish Hydro logo 1 Year Fixed Price Fixed 1 year 1109
GnERGY logo Super Saver Variable 1110
Ovo Energy logo Cheaper Energy (Fixed to June 2016) Fixed 2 years 1126
Southern Electric logo 1 Year Fixed Price Fixed 1 year 1127
Utility Warehouse logo Double Gold Variable 1128
M&S Energy logo Fixed Price Sept 2015 Fixed 1 year 3 months 1130
Sainsbury's Energy logo Fixed Price April 2016 Fixed 1 year 10 months 1140
e.on logo Fixed One Year Fixed 1 year 1141
GnERGY logo Standard Variable Variable 1145
Woodland Trust Energy logo Greener Energy Fixed 1 year 1148
SWALEC logo 1 Year Fixed Price Fixed 1 year 1149
AVERAGE 1150
Ovo Energy logo Greener Energy Fixed (1 Year) Fixed 1 year 1154
Scottish Power logo Fixed Price Energy June 2016 Online Fixed 2 years 3 months 1155
Utility Warehouse logo Gold Variable 1158
First Utility logo iSave Everyday Variable 1161
SSE logo Standard Fixed 2 years 9 months 1162
SSE logo Fixed Price March 2017 Variable 1162
EDF Energy Logo Standard Variable 1164
npower logo Online Price Fix April 2016 Fixed 1 year 10 months 1164
MEDIAN 1165
Green Star Energy logo No Worries 36 Months Fixed Fixed 3 years 1169
e.on logo Energy Plan Variable 1170
Co-Operative Energy logo Pioneer - DD Variable 1173
Extra Energy logo Variable Price Variable 1173
First Utility logo iSave Fixed September 2017 Fixed 3 years 3 months 1177
Ovo Energy logo Better Energy (Fixed to June 2016) Fixed 1 year 1179
Scottish Hydro logo Fixed Price March 2017 Fixed 2 years 9 months 1180
Scottish Hydro logo Standard Variable 1180
Utility Warehouse logo Value Variable 1182
Co-Operative Energy logo Fixed to May 2016 Fixed 1 year 11 months 1186
e.on logo Price Protector September 2016 Fixed 2 years 3 months 1186
M&S Energy logo Standard Energy Variable 1190
Scottish Power logo Online Energy Variable 1191
e.on logo Fixed 2 Year Fixed 2 years 1193
e.on logo Age UK Fixed 2 Year Fixed 2 years 1193
Utility Warehouse logo Double Gold Fixed Price Fixed 3 years 10 months 1194
Sainsbury's Energy logo Standard Variable 1195
British Gas Logo Standard Variable 1196
British Gas Logo Fix & Reward August 2015 Fixed 1 year 2 months 1196
Sainsbury's Energy logo Fix & Reward August 2015 Fixed 1 year 2 months 1196
Southern Electric logo Fixed Price March 2017 Fixed 2 years 9 months 1199
Southern Electric logo Standard Variable 1199
Good Energy logo Good Energy Variable 1200
npower logo Standard Variable 1206
EDF Energy Logo Blue+Price Freeze July 2017 Fixed 3 years 1 month 1209
Scottish Power logo Help Beat Cancer Fixed Price Energy Online April 2017 Fixed 2 years 10 months 1214
npower logo Intelligent Fix April 2017 Fixed 2 years 10 months 1218
SWALEC logo Standard Fixed 2 years 9 months 1221
SWALEC logo Fixed Price March 2017 Variable 1221
Co-Operative Energy logo Fixed to March 2017 Fixed 2 years 9 months 1225
British Gas Logo Fixed Price January 2017 Fixed 2 years 7 months 1226
Ecotricity logo Green Electricity Variable 1233
GnERGY logo Fixed 1 year 1233
Spark Energy logo Direct Debit Saver Variable 1237
Ebico logo Equidual Variable 1287

A few precautions

The following table compares all energy suppliers with:

  • dual-fuel plans;
  • online account management;
  • monthly direct debit.

This is what most people choose. However, it does not compare:

  • prepaid energy plans;
  • Economy 7 energy plans;
  • single-fuel energy plans;
  • paper billing energy plans.

Furthermore, these are average UK figures. Yet prices vary from one region to another. This makes the table a good indication of the cheaper v. the more expensive suppliers on average but probably does not reflect your specific situation. Your comparison should rest on your postcode and exact energy consumption.

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See estimated annual costs for all energy suppliers and find out which the cheapest electricity and gas supplier is!