British Gas early exit fees and how to avoid them

Key takeaways (quick scan)

• Fixed tariffs commonly have exit fees; variable tariffs generally don’t (but always confirm your own terms).
• Exit fees are per fuel on many tariffs (one for gas and one for electricity), so dual fuel can mean two fees.
• Moving home, a supplier error, or switching rights may change what you owe — keep evidence and ask for the fee to be waived if it shouldn’t apply.

What to gather before you decide

Tariff name & type

Fixed or variable, and the tariff end date.

Exit fee amount

Check if it’s per fuel and whether it changes over time.

Your switch date

The day your new supplier takes over matters more than the day you apply.

An early exit fee is a charge for leaving a fixed energy tariff before the agreed end date. It’s designed to cover the supplier’s costs of buying energy in advance. If you’re on a standard variable tariff, exit fees are uncommon — but don’t assume. Always look at your own tariff information.

Where people get caught out is timing. Applying to switch isn’t the same as the supply actually changing. You’ll usually see a switch start date (or a planned supply start date) once the new supplier processes your application.

Avoiding exit fees: a practical step-by-step

1. Find your tariff end date and any exit fee wording (welcome email/letter, online account, or latest bill).
2. Check if the exit fee is per fuel. If you only switch electricity (or only gas), you might only trigger one fee.
3. If your fix is ending soon, plan the application date so the switch completes after the end date.
4. Take screenshots (or download PDFs) showing the tariff end date and exit fee terms.
5. When you get your final bill, check whether an exit fee was charged and challenge it quickly if it looks wrong.

Decision checklist (quick and blunt)

• Do you know your tariff end date (not just the month)?
• Is the exit fee per fuel, and what’s the total for dual fuel?
• Will your switch complete before the end date?
• Have you compared like-for-like payment method and meter type?
• If you’re in credit/debt, do you know how the final bill will be handled?

Who this approach suits (and who it doesn’t)

It usually suits you to avoid exit fees if your fix ends soon, you want a clean break, or you’re mid-house-move and don’t need extra admin.

It’s less likely to suit you to wait if your fix has a long time left and you’ve checked (with real quotes) that even after paying the fee, the estimated difference is still meaningful for your household.

Pitfall: assuming “no fee” because you’re leaving the supplier

Exit fees are tied to the tariff contract, not the supplier name. British Gas can have tariffs with fees and tariffs without them. Your bill/welcome pack is what counts.

Pitfall: forgetting dual fuel can mean two fees

Many fixed deals charge separately for electricity and gas. If you switch both, check the combined cost. If you switch one, check you won’t trigger both fees anyway (your terms will say).

Pitfall: the “wrong” date

People look at the day they clicked “switch” and miss the actual supply start date. If the start date lands before the end of your fix, that’s when fees can appear.

What exit fees don’t cover

Even if you avoid an exit fee, you may still see other final-bill movements:

• Credit refunded after the final bill is produced (timing varies by supplier).
• Debit balance that still needs paying (for example, if your direct debit was set low).

If an exit fee looks wrong

Start with evidence. Save the tariff end date and the terms you accepted, plus the final bill showing the fee.

Then raise it with the supplier and ask for a written explanation of why the fee applied. If you can’t resolve it, Citizens Advice explains the next steps for energy complaints.

Citizens Advice guidance on energy supply problems and complaints

Do British Gas tariffs always have early exit fees?

No. Exit fees are common on fixed tariffs, but not every tariff has them. The only safe answer is what your own tariff terms say (your bill, online account, or welcome pack usually shows the fee and the fixed end date).

Are British Gas exit fees per fuel or per account?

It depends on the tariff. Many fixed deals charge an exit fee per fuel, so switching gas and electricity together can mean two fees. Check your tariff information carefully so you can see the total risk before you switch.

Can I switch away from British Gas during the cooling-off period without paying an exit fee?

If you’ve just agreed a new contract, you normally have a cooling-off period where you can cancel. How fees are treated depends on what you agreed and what stage the switch is at, so check your confirmation documents and contact the supplier promptly for the cleanest cancellation route.

If I’m moving home, do I have to pay an early exit fee to leave British Gas?

Not always. It depends on your contract and whether the supplier can continue the tariff at your new address. Before you cancel anything, ask British Gas to confirm (in writing) how moving affects your tariff, whether an exit fee applies, and what you need to do on moving day.

How do I find my British Gas tariff end date and exit fee?

Start with your latest bill and any contract/welcome emails: look for the tariff name, whether it’s fixed, the end date, and the exit fee amount. If it’s unclear, ask customer services to confirm the end date and exit fee in writing so you can keep a record.

What should I do if British Gas charges an exit fee after I switch and I think it’s wrong?

Check the final bill against your tariff end date and the terms you accepted. If the supply start date was after the end date (or the fee shouldn’t apply for another reason), contact British Gas and ask for a written breakdown. If it isn’t resolved, follow the formal complaints route and use independent advice.

Does switching just electricity (or just gas) help me avoid exit fees?

Sometimes. If your tariff charges exit fees per fuel, switching only one supply may reduce the fee you risk paying. It’s not guaranteed — some terms treat leaving any part of the contract as an early exit — so check your own tariff wording before you proceed.

Will I lose my credit balance if I switch away from British Gas?

You shouldn’t lose it, but you may wait for it. Any credit is normally calculated on your final bill after the switch, then refunded. Keep meter readings (with photos if you can) and check that the final bill uses the right readings.

Page details

Written by

EnergyPlus Editorial Team

Reviewed by

Energy Specialist

Last updated

September 2026

How we assess “avoid exit fees” advice

We focus on what a household can verify before switching: tariff type (fixed vs variable), tariff end date, and the supplier-stated exit fee terms. We then map those checks to UK switching norms (switch completion date vs application date) and consumer guidance from regulators and advice bodies.

Limitations: we don’t have your contract documents, and we don’t publish live supplier pricing or tariff names on this page. Exit fee amounts and exceptions are contract-specific, so where your terms and this guide differ, your written contract terms should be your starting point.