Cheapest Energy Supplier UK
When people search for the cheapest energy supplier UK, they are usually hoping for a simple winner. In reality, the lowest headline tariff is not always the cheapest option once real-world usage is taken into account. Martin Lewis has long warned that the best deal depends on how and when you use energy, not just the unit rate on the front page.
This is where Octopus Energy often stands out. They have been named a Which? Recommended Provider for nine years in a row and have led the UK market in time of use tariffs such as Agile, Tracker, Intelligent Go and Cosy. For households that can shift demand, especially those with EVs, batteries or heat pumps, these smart tariffs can undercut many traditional “cheap” flat deals.
The key takeaway is simple. The cheapest supplier on paper is not always the cheapest in practice. For engaged households willing to use time of use pricing, Octopus Energy is frequently one of the strongest options in the UK market.
Octopus Energy smart tariffs explained in detail
For a fuller comparison of Octopus Energy’s smart tariffs, see my detailed guide on Octopus Energy smart tariffs.
It lays out how each tariff works, the typical pricing structures, and what kinds of households benefit most from each option.
You’ll find real price examples, side-by-side comparisons and tips for choosing the best tariff based on your usage pattern, solar or storage setup, and flexibility.
This smart tariff pricing resource helps you go beyond the basics and decide which Octopus tariff could save you money in practice.
Referral information and free credit offer
If you find Energy Stats UK useful, there are a couple of easy ways to support the site and help cover hosting and server costs.
Thinking about switching energy suppliers?
Homeowners who join Octopus Energy using my referral link get £50 free credit after signing up. Business users get £100 free credit, and if you’re looking at solar or a heat pump, there’s also a £100 gift card through Octopus Tech.
Finally, a £25 gift card can be claimed when having an EV charger installed through Octopus.
“Existing Octopus customer? Find out how you can benefit too. T&Cs apply (only one switching offer per household)”
Or, if you just want to say thanks, you can buy me a coffee.
You can also see more ways to support the site here via the likes of Plusnet broadband, Smarty Mobile, Havenwise remote heat pump control, Hetzner Cloud hosting, Axle Energy, Quidco and more.
If you are thinking about a heat pump, check out my Trusted Heat Pump Installers page along with my guide How to Choose a Heat Pump Installer.
Follow @energystatsuk on Twitter / X, Bluesky and Mastodon for daily tariff graphs and updates.
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Note: The current and past performance of energy pricing is not necessarily a guide to the future.
