Cut your bills with Britain’s cheapest fixed tariff

You can now fix your rates for less and save over £200 compared to the new July price cap. Read more about our claims.

From July 1 2025, the Ofgem energy price cap will reduce to £1,849 per year for a typical home.

But you don't need to wait – fix your prices now for even less than the July costs.

For a typical home, this could shave over £200 off their annual energy bill compared to July's price cap rates.

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Fix with Octopus today! It’ll only take a few minutes

Already an Octopus customer? Fix your current prices via your dashboard.

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Great value for the long term

Our standard prices have always been cheaper than any other large supplier.

The UK's most awarded energy supplier

We've won more awards for customer service than anyone else.

Energy for a cheaper, greener future

We're one of Europe's leading investors in renewable generation.

Officially the UK's most awarded energy supplier

Backed by the Energy Switch Guarantee, you can be confident that things will run smoothly and that you're making the right move.

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The numbers behind the savings:

  • Britain’s cheapest dual-fuel energy-only fixed tariff in any region for a medium consumption home (as defined by Ofgem). To compare fixed prices across all regions for medium consumption, view this PDF.
  • While prices change regularly, a typical dual-fuel annual quote is £1575 as of 23 May 2025.
  • Ofgem announced the 2025 July price cap at £1,849 per year for a typical household who use electricity and gas and pay by Direct Debit.
  • This means no matter if you're new to Octopus or a loyal customer, if you're currently paying price cap rates (on a default tariff), a typical home could fix their energy prices now with Octopus to save over £200.
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Britain's cheapest, guaranteed.

Seen a better price? We'll beat it – here's what you need to know:

  1. Any customer who signs up during the promotional period is guaranteed the cheapest dual-fuel energy-only tariff in their region for an Ofgem medium consumption home.
  2. In the event a customer finds a valid cheaper equivalent tariff, Octopus Energy will either: a) beat the prices quoted for an Ofgem medium consumption home, or b) credit the customer's account with the difference between the Octopus tariff and the equivalent tariff for an Ofgem medium consumption home plus one pound; at Octopus Energy's discretion.
  3. If a customer finds a cheaper equivalent tariff that is also available in their area during the promotional period, they can notify us via this form.
  4. Claims will be honoured up to 30 days after the customer's application to switch. 
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We're Britain's #1 choice for energy

From the 31st of October 2024, Octopus Energy is the company with the most household energy (defined as the sum of electricity and gas) accounts in Great Britain. This makes us the UK's most popular energy supplier.

As of the 31 October 2024, Octopus Energy became the leading supplier of household energy accounts (defined as the sum of electricity and gas) in Great Britain. The company served 12.9mn household energy accounts registered as live on supply, representing a 23.7% share of the available market. This share is 0.6 percentage points higher than the company with the second-largest share of household energy accounts.

Shares of domestic energy accounts

Where the data comes from

The data comes from the Cornwall Insight Domestic Energy Market Share Survey, which tracks changes in key measures of supply competition. This includes the numbers of domestic electricity, gas and dual fuel accounts held by the competing suppliers in the 14 electricity distribution regions of Great Britain, and also in aggregate across the jurisdiction. The survey is based on detailed research by Cornwall Insight using a wide variety of industry and proprietary sources.

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