How to Switch from British Gas to Octopus Energy

If you are thinking about switching from British Gas to Octopus Energy, you are likely weighing up smart meter compatibility and how the Warm Home Discount transfers. Here is what to expect and how to make your switch as smooth as possible.

Before you switch

Check your British Gas contract end date, especially if you are on a fixed tariff. Early termination fees can range from £50 to £75 per fuel if you leave before your contract ends. Review your latest bill or contact British Gas to confirm any exit fees that might apply.

You will not lose your phone number, email address, or any bundled digital services by switching energy supplier. Only your energy contract changes. If you receive the Warm Home Discount, note that you will need to reapply with Octopus Energy after switching.

How to switch, step by step

Get a quote from Octopus Energy: Visit the Octopus Energy website and enter your postcode and energy usage details. This takes around five minutes.
Sign up with Octopus Energy: Provide your address, payment details, and meter information to complete the sign-up.
Octopus Energy manages the switch: They will notify British Gas and handle the entire process. No need to contact British Gas yourself.
Submit opening meter readings: Octopus will ask for your meter readings about five days before your switch date. This ensures accurate billing.
Switch completes: The switch usually takes three working days, with no interruption to your energy supply. If there are any delays beyond five working days, you may be entitled to £30 compensation.
Cooling-off period: You have 14 days from sign-up to cancel your switch without penalty.

What to watch out for

Smart meter compatibility: British Gas smart meters are generally compatible with Octopus Energy, but some users have reported intermittent data drops after switching. If you notice issues, Octopus can help troubleshoot or arrange a replacement meter if needed.
Warm Home Discount transfer: The Warm Home Discount does not transfer automatically. After switching, contact Octopus Energy to confirm your eligibility and complete their application process.
Exit fees: If you are on a fixed tariff with British Gas, check for any early termination charges before switching. The 14-day cooling-off period allows you to change your mind without penalty.

Comparison of smart meter compatibility and Warm Home Discount transfer

Comparison of Smart Meter Compatibility and Warm Home Discount Transfer Options between British Gas and Octopus Energy in the UK (as of March 2026)
Feature	British Gas	Octopus Energy
Smart Meter Compatibility	Offers smart meter installations and supports smart meter functionality for both credit and prepayment customers. Smart meters can be installed upon request. (scottishgas.co.uk)	Provides smart meter installations and supports smart meter functionality for both credit and prepayment customers. Smart meters can be installed upon request. (octopus.energy)
Warm Home Discount Transfer Options	Participates in the Warm Home Discount scheme, offering eligible customers a one-off £150 discount on their electricity bills. The discount is applied directly to the electricity account between November 2025 and 31 March 2026. (scottishgas.co.uk)	Participates in the Warm Home Discount scheme, offering eligible customers a one-off £150 discount on their electricity bills. The discount is applied directly to the electricity account before 31 March 2026. (octopus.energy)

Sources: Warm Home Discount - what is it and eligibility - British Gas; The Warm Home Discount | Octopus Energy

Switch with Lodo

Want to make switching from British Gas to Octopus Energy as easy as possible? Lodo is the simplest way to do it.

We will sign you up with Octopus Energy and handle the supplier switch. If anything goes wrong, we resolve it with the providers directly. Free, no catch. Switch with Lodo for free

Frequently asked questions

How much does it cost to leave British Gas?

Octopus Energy does not charge exit fees for switching. However, if you're on a fixed-term contract with British Gas, you may incur early termination fees. It's advisable to check your current contract terms with British Gas before switching. (octopus.energy)

How long does the switch take?

The switching process typically takes about 17 days from start to finish. (localenergyprices.co.uk)

Will I lose my phone number, email address, or smart meter data?

Switching your energy supplier does not affect your phone number, email address, or smart meter data. Your existing services will remain unchanged.

Can I switch if I am still in contract?

Yes, you can switch to Octopus Energy even if you're still under contract with British Gas. However, be aware that you may incur early termination fees from your current supplier. (octopus.energy)

Do I need to contact British Gas or does Octopus Energy handle it?

Octopus Energy will handle the entire switching process, including notifying British Gas of your decision to switch. You do not need to contact your current supplier. (octopus.energy)

What happens if something goes wrong during the switch?

If any issues arise during the switch, Octopus Energy will inform you and work to resolve them promptly. Your energy supply will not be interrupted during the switching process. (octopus.energy)

Is there any downtime?

There is no downtime during the switch. Your energy supply will continue uninterrupted throughout the process. (octopus.energy)

Anything else specific to this provider pair?

Octopus Energy is known for its customer service and transparent pricing. They offer a 14-day cooling-off period during which you can cancel the switch without penalty. (octopus.energy)