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Chart

Source: Energylinx (Until May 2017) & Energyhelpline (June 2017 onwards).

Information correct as of: August 2018

This chart compares the cheapest available tariffs offered by the six large suppliers with the cheapest tariff available in the market by payment method (direct debit, standard credit and prepayment). Figures are based on a typical domestic dual fuel customer.

From February 2017 the prices shown in the chart are calculated using the new TDCV values that entered into effect from 1st of October 2017 (see the methodology section for more details).

In practical terms, this means that the tariffs offered after February 2017 are likely to appear slightly lower than those before February 2017.  

Policy Areas:

  • Electricity - retail markets
  • Gas - retail markets

Data Table

Cheapest tariffs by payment method: Typical domestic dual fuel customer (GB)

DateLarge six suppliers (direct debit)Large six suppliers (standard credit)Large six suppliers (prepayment)Market (direct debit)Market (standard credit)Market (prepayment)
28/01/2012915.27976.701021.54906.56971.04969.61
28/02/2012886.18976.701021.54878.10971.04969.61
28/03/2012886.18976.701021.54878.10971.04969.61
28/04/2012895.69953.401021.54878.10953.40969.24
28/05/2012895.69953.401021.54878.10890.12969.24
28/06/2012895.69953.401021.54895.69953.401017.42
28/07/2012895.69953.401021.54875.93953.401017.42
28/08/2012899.10957.031021.54875.93957.031017.42
28/09/2012901.471020.711021.54875.93988.141017.42
28/10/2012906.171020.711069.39893.85988.141019.30
28/11/2012958.211020.711069.39909.59979.351045.64
28/12/2012990.701071.381133.19909.59979.351045.64
28/01/2013957.181037.201133.19909.59979.351045.64
28/02/2013957.181037.201133.19909.591037.201045.64
28/03/2013966.541046.571133.19909.591046.571045.64
28/04/2013966.541046.571133.19909.591046.571045.64
28/05/2013966.541046.571133.19962.43996.901045.64
28/06/2013966.541046.571133.19769.95996.901045.64
28/07/2013984.681075.511133.19769.95996.901045.64
28/08/2013971.771051.791133.19769.951051.791045.64
28/09/2013971.771051.791133.19769.951051.791045.64
28/10/20131011.801079.911133.19769.951070.991093.35
28/11/2013993.401058.151150.97769.951058.151093.35
28/12/20131033.471101.651178.61769.951101.651093.35
28/01/20141033.471101.651178.61975.211101.651172.77
28/02/20141033.971108.101178.61966.341108.101172.77
28/03/20141024.791117.271178.61964.311117.271171.39
28/04/20141000.381069.951178.61946.421069.951171.39
28/05/20141000.381069.951178.61944.551069.951171.39
28/06/20141000.381069.951170.86944.551069.951162.40
28/07/20141000.381069.951170.86944.951029.051162.40
28/08/20141000.381069.951170.86943.431038.881154.43
28/09/2014960.901030.951170.86942.271030.951154.43
28/10/2014953.401046.451170.86931.021024.451154.43
28/11/2014921.881003.791170.86914.511003.791154.43
28/12/2014916.211003.791170.86906.141003.791151.22
28/01/2015875.40945.461148.99871.26945.461148.99
28/02/2015839.28955.071148.90839.28950.351148.90
28/03/2015836.99907.241148.99836.99907.241116.99
28/04/2015834.57977.561141.64834.57950.631116.99
28/05/2015835.19905.441141.64830.56905.441116.99
28/06/2015835.71981.781122.97830.56940.901116.99
28/07/2015863.85981.781122.97830.56939.851116.99
28/08/2015876.03977.321128.54830.56940.271116.99
28/09/2015876.03963.771128.54830.56907.261100.94
28/10/2015803.00873.251128.54793.93844.041100.94
28/11/2015805.40950.751128.54787.05844.041055.61
28/12/2015850.52950.751102.20787.05844.041055.61
28/01/2016769.69839.941102.20765.00839.941055.61
28/02/2016738.38808.631092.26738.38808.631054.20
28/03/2016727.70797.761070.37727.70797.761051.22
28/04/2016723.91793.481070.37723.91793.481030.27
28/05/2016723.23877.121037.31723.23877.121017.61
28/06/2016723.23847.451037.31723.23847.45985.97
28/07/2016779.39904.971037.31758.31871.54985.97
28/08/2016801.37941.421043.54769.65871.54985.97
28/09/2016754.64839.151043.54744.30839.15985.97
28/10/2016803.54967.131043.54741.92829.42985.97
28/11/2016897.181002.631035.64790.02907.75985.97
28/12/2016951.511031.571035.64790.02923.48985.97
28/01/2017951.511031.571035.64833.71951.58985.97
28/02/2017928.481033.401015.43829.10935.19970.67
28/03/2017922.231016.741019.21829.10949.48970.67
28/04/2017923.551018.06994.53863.31946.43970.67
28/05/2017923.571018.08994.53826.52923.47979.27
28/06/2017923.571018.08994.53835.76923.23979.27
28/07/2017922.821017.33994.53829.91923.23979.27
28/08/2017910.051004.56988.90810.11923.47979.27
28/09/2017904.481051.43988.90826.73923.47979.27
28/10/2017897.981012.47988.90826.73943.35978.04
28/11/2017928.591100.89988.90826.73958.08978.04
28/12/2017973.041051.43988.90798.72958.08957.12
28/01/2018907.891051.43988.90809.32958.08960.06
28/02/2018900.981050.871028.21810.06958.08945.76
28/03/2018900.981074.651028.21810.11958.08945.76
28/04/20181000.421143.141030.55788.16958.08946.63
28/05/2018962.531057.041030.93788.16958.08946.63
28/06/2018953.161033.191070.34796.99958.08946.63
28/07/2018965.271045.291070.34826.73990.66946.63

More information

At-a-glance summary

Direct debit customers have traditionally been offered the cheapest tariffs, followed by standard credit customers and then those using prepayment meters.  

After the introduction of the prepayment safeguard tariff in April 2017, the overall cheapest tariffs have continued to be those for direct debit customers. However, the ranking between standard credit and prepayment cheapest tariffs has fluctuated over time. In June 2018, the large six suppliers’ cheapest tariff for prepayment customers was greater than the cheapest tariff offered to standard credit customers and this has continued into July. By contrast, across the market, the cheapest tariff for prepayment customers in July 2018 was below the cheapest tariff offered to standard credit customers.

A prepayment safeguard tariff was introduced on 1 April 2017, limiting the amount that suppliers can charge their prepayment customers. We extended the safeguard tariff to a further one million vulnerable customers in receipt of the government’s Warm Home Discount on 2 February 2018. For more information on the impact of the safeguard tariff, please see here.

Relevance and further information

This indicator helps us understand pricing by payment methods, as well as how much other suppliers are able to compete with the six large suppliers for each method.

Methodology

We calculate the bill values associated with the different tariff types using a ‘typical medium domestic consumer’. As of October 2017, typical consumption values for a medium consumer are 12,000kWh/year for gas and 3,100kWh/year for electricity (profile class 1). The chart includes collective switching tariffs from Q1 2016.

All tariffs shown in the chart are for a dual fuel customer. Dual fuel refers to a situation where a customer takes gas and electricity from the same supplier.

Tariffs with limited availability depending on customer features (for example, tariffs which are only available to new customers, also known as ‘acquisition’ tariffs, or tariffs restricted to certain regions) are excluded from the calculation to make sure that all tariffs considered are generally available to all customers across GB.

Tariffs available with white label suppliers are included in the calculation of the cheapest tariff. White label suppliers are organisations without supply licences that partner with an active licensed supplier to offer gas and electricity using their own brand.

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Chart

Source: Energylinx (Until May 2017) & Energyhelpline (June 2017 onwards).

Information correct as of: August 2018

This chart shows trends in domestic energy bills by tariff offered by the six large suppliers and other suppliers. It compares their average standard variable tariffs with the cheapest tariffs available in the market (including white label tariffs). Figures are based on a typical domestic dual fuel customer paying by direct debit. 

From February 2017 the prices shown in the chart are calculated using the new TDCV values that entered into effect from 1st of October 2017 (see the methodology section for more details).

In practical terms, this means that the tariffs offered after February 2017 are likely to appear slightly lower than those before February 2017.  

This information should not be used as a price comparison tool. To find out about accredited price comparison sites, see Compare gas and electricity tariffs.

Policy Areas:

  • Electricity - retail markets
  • Gas - retail markets

Data Table

Retail price comparison by company and tariff type: Domestic (GB)

DateAverage standard variable tariff (Six large suppliers)Average standard variable tariff (Other suppliers)Cheapest tariff (Six large suppliers)Cheapest tariff (All suppliers)Cheapest tariff (Basket)
28/01/20121020.161024.33915.27906.56947.56
28/02/20121000.761017.41886.18878.10930.29
28/03/2012997.251017.41886.18878.10936.54
28/04/2012997.251017.35895.69878.10937.68
28/05/2012997.251017.35895.69878.10929.78
28/06/2012997.251032.16895.69895.69945.53
28/07/2012997.251032.16895.69875.93928.99
28/08/2012997.251030.02899.10875.93924.85
28/09/2012997.251017.84901.47875.93931.04
28/10/20121009.001020.51906.17893.85956.00
28/11/20121030.781075.12958.21909.59997.71
28/12/20121061.801087.65990.70909.59994.59
28/01/20131074.421087.65957.18909.59990.81
28/02/20131074.421119.05957.18909.59994.56
28/03/20131074.421119.05966.54909.59995.50
28/04/20131074.421119.05966.54909.59988.37
28/05/20131074.431119.05966.54962.43997.77
28/06/20131074.431119.05966.54769.95967.26
28/07/20131074.451119.05984.68769.95974.82
28/08/20131074.451119.05971.77769.95988.47
28/09/20131074.451119.05971.77769.95979.55
28/10/20131074.451127.021011.80769.95995.67
28/11/20131105.941123.75993.40769.95992.26
28/12/20131138.951123.751033.47769.95997.00
28/01/20141145.841125.141033.47975.211013.73
28/02/20141134.091128.761033.97966.341014.19
28/03/20141128.101126.611024.79964.311016.25
28/04/20141128.101129.621000.38946.42995.26
28/05/20141128.101129.621000.38944.55995.13
28/06/20141128.101129.621000.38944.55992.88
28/07/20141128.101134.191000.38944.95976.39
28/08/20141128.101127.791000.38943.43978.98
28/09/20141128.101158.39960.90942.27972.34
28/10/20141128.101131.80953.40931.02960.15
28/11/20141128.101131.80921.88914.51947.94
28/12/20141128.101130.51916.21906.14929.69
28/01/20151124.331130.51875.40871.26895.39
28/02/20151106.651110.84839.28839.28881.39
28/03/20151106.651088.31836.99836.99892.38
28/04/20151106.651075.32834.57834.57878.56
28/05/20151102.281073.26835.19830.56877.12
28/06/20151102.281073.26835.71830.56871.21
28/07/20151102.281066.77863.85830.56867.88
28/08/20151098.031066.77876.03830.56868.79
28/09/20151098.031054.98876.03830.56858.62
28/10/20151098.031050.12803.00793.93823.00
28/11/20151098.031040.70805.40787.05810.84
28/12/20151098.031039.03850.52787.05803.86
28/01/20161098.031035.48769.69765.00785.04
28/02/20161092.691020.06738.38738.38755.65
28/03/20161071.441013.00727.70727.70756.05
28/04/20161065.97978.55723.91723.91751.58
28/05/20161065.97976.04723.23723.23742.71
28/06/20161065.97984.02723.23723.23751.36
28/07/20161065.97988.70779.39758.31779.72
28/08/20161065.97983.86801.37769.65789.25
28/09/20161065.97983.89754.64744.30777.00
28/10/20161065.97994.93803.54741.92786.41
28/11/20161065.971012.84897.18790.02859.23
28/12/20161065.971019.72951.51790.02872.16
28/01/20171061.061020.10951.51833.71881.11
28/02/20171081.271027.06928.48829.10869.79
28/03/20171109.481035.47922.23829.10873.38
28/04/20171122.281041.56923.55863.31874.62
28/05/20171122.281039.22923.57826.52861.76
28/06/20171122.281026.98923.57835.76852.58
28/07/20171122.281030.63922.82829.91844.94
28/08/20171122.281030.76910.05810.11839.30
28/09/20171134.951026.42904.48826.73837.66
28/10/20171134.951031.41897.98826.73854.69
28/11/20171134.951044.84928.59826.73846.77
28/12/20171134.951040.86973.04798.72841.48
28/01/20181134.951036.14907.89809.32840.81
28/02/20181134.951039.85900.98810.06840.58
28/03/20181134.951044.29900.98810.11842.91
28/04/20181138.281061.811000.42788.16820.46
28/05/20181138.281060.56962.53788.16832.69
28/06/20181172.201066.39953.16796.99845.91
28/07/20181184.791075.35965.27826.73861.22

More information

At-a-glance summary

As of July 2018, the average price of SVTs for the six large suppliers for a typical dual fuel customer paying with direct debit was £1,185, an increase of £13 from the previous month. On the other hand, the average cheapest tariff increased by £30, reaching £827.

As a result, the differential between the average price of SVTs for the six large suppliers and the market cheapest tariff decreased from £375 to £358 between June and July 2018.

SSE raised its SVT tariff on 11 July, which is the reason for the increase in the average price of SVTs for the six large suppliers. Two further price increases took effect in August, by E.ON and EDF, which will be reflected in the next update.

British Gas and ScottishPower have each announced another price rise for customers on both SVT and default fixed tariffs, which will take effect on 1 October 2018 and 8 October 2018, respectively.

Please note that, from 1 April 2018, British Gas’ SVT, which is included in the average SVT price for the six large suppliers, is no longer available to new customers.

For details on prices of fixed default tariffs, please see the chart showing Average tariff prices per supplier.

Relevance and further information

Tariff differentials reflect pricing in different market segments, as well as how much other suppliers are able to compete on price with the six large suppliers.

Methodology

We calculate the bill values associated with the different tariff types using a ‘typical medium domestic consumer’. As of October 2017, typical consumption values for a medium consumer are 12,000kWh/year for gas and 3,100kWh/year for electricity (profile class 1). The chart includes collective switching tariffs from Q1 2016. All tariffs shown in the chart are for a dual fuel, direct debit customer. Dual fuel refers to a situation where a customer takes gas and electricity from the same supplier.

A standard variable tariff refers to a supply contract which is for a period of an indefinite length and which does not contain a fixed term period that applies to any of the terms and conditions. It’s an energy supplier’s basic offer. If a customer does not choose a specific energy plan, for example after their fixed tariff ends, they will be moved on a standard variable tariff until they have chosen a new one. A customer can also make an active choice to select a standard variable tariff.

Tariffs with limited availability depending on customer features (for example, tariffs which are only available to new customers, also known as ‘acquisition’ tariffs, or tariffs restricted to certain regions) are excluded from the calculation to make sure that all tariffs considered are generally available to all customers across GB.

Tariffs available with white label suppliers are included in the calculation of the cheapest tariffs. White label suppliers are organisations without supply licences that partner with an active licensed supplier to offer gas and electricity using their own brand.

To calculate the average of the cheapest tariffs from the 10 cheapest suppliers we took the cheapest tariff offered by each supplier in the market (i.e. one tariff per supplier) and then ranked the tariffs in order of price. We then took the simple average of the 10 cheapest tariffs in this list. This method is to ensure a cross section of suppliers is included in the calculation.

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Chart

Source: Energylinx (Until May 2017) & Energyhelpline (June 2017 onwards).

Information correct as of: August 2018

This chart compares trends in prices since 2016 for a dual fuel customer paying by direct debit or prepayment. It shows both the market cheapest tariffs and average standard variable tariffs (SVT) for the two payment methods. The values are calculated for a customer with typical energy use.

From February 2017 the prices shown in the chart, including the level of the prepayment price cap, are calculated using the new TDCV values that entered into effect from 1st of October 2017 (see the methodology section for more details).

In practical terms, this means that the tariffs offered after February 2017 are likely to appear slightly lower than those before February 2017.  

Policy Areas:

  • Electricity - retail markets
  • Electricity - wholesale markets
  • Gas - retail markets
  • Gas - wholesale markets

Data Table

Safeguard tariff and direct debit prices since January 2016 (GB)

DateSVT - direct debit (market average)SVT - prepayment (market average)Cheapest tariff - direct debit (all suppliers)Cheapest tariff - prepayment (all suppliers)Safeguard tariff
28/12/20151091.691163.44770.591055.61
28/01/20161091.141163.18765.001055.61
28/02/20161086.371158.61738.381054.20
28/03/20161067.321138.39727.451051.22
28/04/20161059.621131.32723.911030.27
28/05/20161059.621131.32723.231017.61
28/06/20161059.621131.32723.23985.97
28/07/20161059.501130.22758.31985.97
28/08/20161059.501130.22769.65985.97
28/09/20161059.501130.22744.30985.97
28/10/20161059.681130.22741.92985.97
28/11/20161059.681122.72790.02985.97
28/12/20161059.681122.72790.02985.97
28/01/20171057.191115.77833.71985.97
28/02/20171059.301061.14829.10970.67
28/03/20171088.781059.99829.10970.67
28/04/20171095.821032.30863.31970.671050.35
28/05/20171095.821032.30826.52979.271050.35
28/06/20171095.821032.30835.76979.271050.35
28/07/20171095.401032.69829.91979.271050.35
28/08/20171096.131031.31810.11979.271050.35
28/09/20171122.931034.46826.73979.271050.35
28/10/20171123.131030.60826.73978.041031.27
28/11/20171123.131030.60826.73978.041031.27
28/12/20171123.131030.60826.73957.121031.27
28/01/20181112.861030.72820.11960.061031.27
28/02/20181112.861030.72820.11945.761031.27
28/03/20181112.861030.85810.11945.761031.27
28/04/20181115.821079.09788.16946.631088.55
28/05/20181115.821086.20788.16946.631088.55
28/06/20181148.751086.19796.99946.631088.55
28/07/20181164.291086.08826.73946.631088.55
28/08/20181088.55

More information

At-a-glance summary

In April 2017, the new safeguard tariff came into force, limiting the amount that suppliers can charge their prepayment customers. These customers tend to be unable to access the cheapest deals and are also more likely to be in vulnerable circumstances.

The cheapest prepayment tariffs available in the market have remained below the average SVT for a prepayment customer following the introduction of the safeguard tariff.

We extended the safeguard tariff to a further one million vulnerable customers in receipt of the government’s Warm Home Discount on 2 February 2018.

From 1 April 2018, the level of the safeguard tariff rose from £1,031 to £1,089 for a dual fuel customer who uses a typical amount of energy. This increase is mainly due to higher wholesale energy costs and policy costs to support low carbon forms of electricity generation. See our chart for further details, Breakdown of the safeguard tariff.

As suppliers increased their prepayment SVT prices to the new level of the cap, the differential between the average prepayment SVT and the market cheapest PPM tariff increased to £139 in May 2018 and has remained at this level through to July 2018. The average bill for prepayment customers on an SVT, which used to be amongst the highest in the market, is around £78 lower than the current standard variable tariff (SVT) paid by direct debit customers as of July 2018.

Relevance and further information

This chart helps us track the differences between the price a customer will pay depending on if they use prepayment (where prices are capped) or direct debit to pay their energy bills.

You can find further information on the Safeguard tariff (or 'price cap') here. The cap lasts until 2020. By then we expect the smart meter roll-out to give prepay customers access to better deals.

Methodology

  • We calculate the bill values associated with the different tariff types using a ‘typical medium domestic consumer’. As of October 2017, typical consumption values for a medium consumer are 12,000kWh/year for gas and 3,100kWh/year for electricity (profile class 1). 
  • All prices shown are for a dual fuel customer (i.e. where a customer takes gas and electricity from the same supplier). 
  • The market average SVTs are based on the prices of the 10 largest suppliers in the direct debit and prepayment segments. We have weighted the SVT of each supplier using an estimate of their total share of all SVT customers (for direct debit), and their total share of all prepayment accounts (for prepayment). We update the weightings every six months in January and July to reflect customer numbers four months prior to publication. The time lag is due to data availability. For example, the average given for 28 January 2017 uses weights based on customer numbers at 31 October 2016, while the average for 28 December 2016 uses weights at 31 March 2016.
  • An SVT refers to a supply contract which is for a period of an indefinite length, and which does not have a fixed-term period applying to any of the terms and conditions. It’s an energy supplier’s basic offer. If a customer does not choose a specific energy plan, for example after their fixed tariff ends, they will be moved onto an SVT until they have chosen a new one. A customer can also make an active choice to select an SVT.
  • We exclude tariffs with limited availability – such as tariffs only available to new customers (also known as ‘acquisition’ tariffs) or tariffs restricted to certain regions - when calculating the market cheapest tariff. This is so we give a representative picture of tariffs generally available to all customers across GB.
  • We include tariffs available with ‘white label’ suppliers in our calculation of the cheapest tariffs. White label suppliers are organisations without supply licences that partner with an active licensed supplier to offer gas and electricity using their own brand.
  • The cheapest tariff shown on the chart includes any collective switching tariffs after the first quarter of 2016.

In all cases, the prices shown are based on suppliers’ tariffs averaged across GB regions. The level of the prepayment price cap is based on the values published on our website, adjusted to reflect current typical domestic consumption values, and to include VAT.

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