Who is the Cheapest Energy Supplier in the UK at the Moment? – 28 August 2025

Hi all, With yesterday’s price cap increase announcement and with Autumn just around the corner, a lot of people are looking at […]

Hi all,

With yesterday’s price cap increase announcement and with Autumn just around the corner, a lot of people are looking at getting their energy deals sorted as soon as possible. So, I thought it would be worthwhile looking at the cheapest tariffs available at the moment, and to highlight some of the cons you should be aware of with each supplier.

Important note: There is no definitive “best for everyone” tariff, ever. Tariffs are complex, there are 14 electricity supplier regions and 8 gas suppply regions in the UK, each tariff has different prices for each region. Plus your energy bill is split into unit rates and standing charges, across gas and electric. Therefore, the “cheapest” tariff for one person may not be the cheapest for someone else. So, you should run price comparisons to make sure you’re getting the best deal available FOR YOU. Both of the first two links in the table below will take you to a price comparison service you can use for free, the third link takes you directly to Octopus Energy, as they do not appear on price comparison services.

SupplierTariff NameAVERAGE priceDifference from October price cap
Fuse EnergyAugust 2025 Fixed (13m) V7£1,477-£278
E.ON NextNext Fixed 13M V4£1,555-£200
Octopus EnergyOctopus fixed12m£1,615-£150

PLEASE READ: Whilst Fuse Energy are the cheapest, Uswitch has recently highlighted that they only offer a variable direct debit payment method. This means that rather than having a fixed monthly direct debit, you instead pay each month’s bill as it occurs, so your bills will be high in the winter and low in the summer. The price you pay per kWh and per day will be lower than with any other supplier at the moment, but you will not be able to spread the cost evenly across a year.

Okay, so I put that warning above because it is important, energy usage during the cold months is much higher than during the warmer months, so if you go with Fuse then you will pay much more in winter. Effectively, they’re not allowing people to build debt in the winter and clear it during the summer. Similarly, they do not allow customers to build credit in the summer and use it during the Winter.

The second cheapest in the market is E.ON Next, coming in at £200 cheaper than the price cap. The benefit of E.ON Next compared to Fuse Energy is that you can spread the cost of your energy across the year. E.ON is the cheapest of the Big 6 at the moment, and like normal you can pay a fixed direct debit, building debt in winter and credit in summer, essentially making it easier to manage your bills as it’ll be the same amount every month.

Finally, I listed Octopus. They are the biggest supplier in the UK and they do not appear on price comparison services. I can tell you, from both personal and professional experience, that Octopus Energy has the best customer service in the industry. The majority of people should never need to contact their supplier, but if you do have to then it is nice to know that they deal with problems quickly and efficiently. They also offer £50 free credit on your account if you use a refer-a-friend code from someone already with Octopus Energy (your friend also gets a £50 credit).

There you have it, these three are the cheapest on average in the market at the moment, but as I said at the start, you should run a price comparison and see if other suppliers are cheaper in your specific area or for your usage levels.


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