E.ON or EDF: Who's the best energy supplier for you?

Need help finding the right energy provider for you? We’re here to help. Read on for our comparison of two of the UK’s major energy suppliers. We’ll be covering areas such as value for money, environmental sustainability and customer satisfaction.

If you want to compare a wider variety of suppliers based on your location and needs, just enter your postcode below via the ‘Compare Energy’ button. You’ll be surprised to see how much you could be saving.

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Tariffs availableFixed, variable, capped, PAYG, online only, dual fuel, cinema bundle, prepayment, smart, greenFixed, variable, capped, PAYG, online only, dual fuel, smart, blue, heating protect
Exit feesVaries by tariffVaries by tariff
Customer satisfaction68% (Ofgem)65% (Ofgem)

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About E.ON and EDF

E.ON and EDF are both part of the group of energy suppliers known as the ‘Big Six’ – older companies that dominate the energy market in the UK.


E.ON is one of the largest suppliers of energy in the UK supplying around five million homes and businesses. It is the second largest provider of electricity in the UK. The company was formerly known as Powergen until it was purchased by German company E.ON AG in 2007.


EDF is responsible for generating roughly a fifth of the UK’s electricity, making it the UK’s biggest supplier of electricity by volume. The company is a subsidiary of the EDF Group, which is wholly owned by the French government. EDF make the claim of being the UK’s biggest producer of low-carbon energy, with over half of its energy coming from nuclear energy, or what it calls blue energy.

Which is cheaper?

Both suppliers are competitive and offer deals at certain times, but tariff’s change frequently, depend on your location and on your energy usage – that’s why we recommend using our comparison tool. The Big Six don’t typically provide the cheapest deals. They also tend to change their pricing in very similar ways to one and other so it’s definitely worth considering alternative options when comparing.


E.ON raised prices for customers buying both gas and electricity on their standard variable tariff by 8.8% back in April 2017. This was the second largest increase of the big six, adding £97 to the average dual-fuel yearly bill. They also increased their electricity prices by 13.8%, a move which impacted around 2.5 million customers.


EDF customers have too experienced large price rises since the beginning of 2017. In March they raised electricity prices by 8.4%, before increasing the cost to dual fuel customers on its standard tariff by 7.2% in April. On average since December 2016 customers on EDF’s dual fuel packages will be £91’s worse off.

  • Winner: It depends

Both companies offer some competitive benefits, but are also liable to raise prices even more in the future. The best way to find out which is better value for you is to run an energy comparison, using a postcode checker like the one at the top of this page.

Which offers more tariff options?

An energy supplier that offers a range of options can be desirable – you don’t want to be stuck on an overly expensive standard tariff.


E.ON offers a number of fixed tariffs (1 or 2 years) including a ‘Go Online’ tariff, a 1 Year ‘Cinema Bundle’ that rewards you with two cinema tickets each month, and a ‘Clean Energy’ tariff which uses 100% renewable electricity and gas. They also offer a standard variable plan, a 12 month capped tariff , a ‘Smart Pay As You Go’ package and a prepayment tariff.


In addition to their standard variable tariff EDF offer a ‘Blue + Heating Protect’ plan for dual-fuel customers. As well as fixing your prices this provides heating insurance and electricity 100% backed by low-carbon generation. Their ‘Connect + Control2’ tariff fixes prices until at least February 2020 and comes with HeatSmart and the new Amazon Echo, which allows you to control your heat, energy account, play music and much more with just your voice. They also offer a ‘Smart Saver’ tariff which provides lower prices for using a smart meter and and ‘Online Saver’ tariff that offers lower costs for an online only tariff.

  • Winner: Too tough to call

Both provide a great range of tariffs, including more environmentally friendly options and those which make the most of smart meter technology.

Types of tariff explained

Which will help you avoid exit fees?

No matter which supplier you choose, it’s beneficial to be in a position to switch with minimal costs and hassle.


E.ON don’t charge an exit fee on the majority of their tariffs. The three exceptions are their E.ON Clean Energy, E.ON Go Online 1 year fixed tariffs which charge a £60 fee (£30 for electricity, £30 for gas), and their Cinema Bundle package which charges £50.


While EDF don’t charge any exit fee on their Standard Variable or 12 month fixed ‘Blue+Heating Protect’ tariffs their ‘Connect+Control2’ smart meter tariff that fixes your price tip 2020 charges a significant £135 per fuel if you decide to end your contract before 3 months of its end date. Leaving their ‘Smart Saver’ and ‘Online Saver’ options early will cost you £35 per fuel.

  • Winner: E.ON (just)

E.ON offers a few more tariffs without exit fees that EDF and where they do charge, it’ll cost you less.How to switch energy supplier

Which is more eco-friendly?

If you’re conscious of your carbon footprint, it’s worth investigating how forward-thinking a supplier is when it comes to green energy.

  • Winner: E.ON

Both providers have invested heavily in providing energy from renewable or low-carbon sources. We’ve given this one to E.ON as a significant 29% of their energy comes from renewable compared to a below average 14% from EDF. Nonetheless EDF do source a huge 64% of their energy from low-carbon, nuclear sources. Green energy

Which has more satisfied customers?

An energy supplier that takes time and care over its customer service is sure to cause you less stress in the long run.


According to Ofgem’s August 2017 report, 67% of E.ON’s customers agreed that they were satisfied with the supplier’s service. 28% of customers said they would recommend the supplier, the 4th highest score of the big six.


The same report found that 68% of EDF customers were satisfied with their service, the second highest score of the big six. 30% of EDF customers said they would recommend the supplier.

  • Winner: EDF

    EDF were just 1% higher on their customer satisfaction review the E.ON but received a much higher percentage of customers that would recommend them. Check the results of all the big six here.

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