Changing your energy tariffs

Lock in our fixed tariff today

Change to a fixed tariff and lock in your gas and electricity prices - avoiding the expected October price cap increase.

And, if we launch a cheaper fixed tariff in the future, you can switch for free.

Log in to change tariff

Tariffs for our existing customers

To get the best deal possible, we offer a range of tariffs to suit you. Log in to your online account to see what tariffs you can choose.

Fixed energy tariffs

Lock your energy prices and avoid any price rises.

Standard Variable

Our flexible plans where prices can go up or down.

Electric vehicle tariffs

Get our lowest electricity rates overnight with our EV tariff and charge your car for less.

More tariffs we can offer

Smart Export Guarantee tariffs

If you generate renewable electricity at home, then you could get paid for what you export. Plus, as an existing electricity customer, you get our best SEG tariff rates.

Dimplex Quantum tariff

If you have Dimplex Quantum storage heaters in your home, then we could give you a cheaper night rate with our special tariff in partnership with Dimplex.

Why stay with British Gas?

  • Getting a new deal is easy - choose a new tariff in just a few minutes online
  • Great rates - as good as, or better than, those available to new customers switching to us
  • Save more - with half-price electricity every Sunday when you join Peak Save
  • No exit fees - we don’t charge exit fees if you choose a new fixed tariff with us
  • No waiting - switch deal today and your new tariff starts tomorrow
  • Get rewarded when you refer a friend - share up to £150 in Amazon gift cards if your friends and families switch their energy to us
  • Service you can rely on - We won Best Overall Improvement in the Uswitch Energy Awards 2024. This means we performed best - out of all energy suppliers - at improving our overall customer satisfaction scores this year.

Change tariff as an existing customer

If you’re an existing energy customer you can change to a new tariff at any time by visiting switch tariff in your online account.

Fixed or variable tariffs?

Should I switch to a fixed or variable tariff?

We explain fixed rate and variable rate energy tariffs so you can decide. Learn more about fixed vs variable energy tariffs.

If you’re on:

Fixed tariff

We'll get in touch a month before your current tariff expires to choose a new tariff:

  • No exit fees to pay in renewal window
  • If you don't choose a new tariff, we'll automatically move you to our Standard Variable one when yours ends.

Note: Exit fees applies only if you change from a fixed tariff to Standard Variable before your renewal window.

Standard Variable tariff

You may be on a Standard Variable tariff if you’ve moved into a new home that we supply.

Note: There's no fees to pay if you move from Standard Variable to another British Gas tariff.

Half-price electricity with PeakSave

We're cheering on Team GB and ParalympicsGB all the way to the Paris 2024 Games. Get set for your summer of savings and join PeakSave.

More about PeakSave

What else can you get?

Boiler service – special offer for British Gas energy customers

Get your boiler serviced from just £49 (was £93). 

£49 offer available for annual contracts signed before 10/9/24 to new customers only. Service must be completed before 30/9/24.

Book your boiler service

Exclusive offer: Save £139 on a Hive Thermostat + installation

As a thank you for joining us, get a Smart Thermostat Mini from our friends at Hive, plus expert installation by us, for just £109.1

The Which? Recommended thermostat is packed with clever features that help shrink your carbon footprint and save up to £151 a year.2

Just log in to our existing energy customers deals.

Get yours today

Frequently asked questions

If I change my tariff, will I still get PeakSave?

Yes, PeakSave is available to all electricity customers with a smart meter, no matter what tariff you choose.

Can I change my tariff without exit fees?

If you’re on a fixed tariff, then you can swap to another available fixed tariffs without paying exit fees.

If you’re on a fixed tariff, and you want to move to our Standard Variable tariff, then an exit fee will be applied. 

There’s never an exit fee to pay if you move from our Standard Variable tariff to a fixed tariff.

Additional information

  1. Free Hive Mini thermostat when you pay £109 for professional install by British Gas. Offer not available for self-install products. Requires a British Gas Energy tariff. Individuals without an existing British Gas energy supply contract must enter into an agreement via to qualify for the offer. Offer cannot be used on pre-existing orders or in conjunction with any other offer. Offer ends 30 August 2024.  Subject to availability and we have the right to remove this offer at any time. Terms and exclusions apply – see

  2. Installing a Hive Thermostat can save you up to £151 per year on your heating bill. Saving of £151.22 based on a Ofgem typical annual gas consumption of 11,500 kWh at the July 2024 UK average unit price of 5.479 pence per kWh including VAT. Emissions saved per year: 508 kg CO2 (0.184kg per kWh). Actual savings will vary depending on individual circumstances.