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How-to · Step-by-step

How to switch energy supplier in the UK

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In short. Compare tariffs on an Ofgem-accredited site or directly with suppliers, apply to your chosen deal, then let the 14-day cooling-off period and supplier handover complete — the whole switch typically takes around 21 days.

Switching energy supplier is free and your supply is never cut off during the process. Use an Ofgem Confidence Code comparison site or contact suppliers directly. From 1 July 2026 the price cap rises about 13% for typical homes — standard-variable customers should compare fixes before the reset. Already on a fix? Check exit fees and the 49-day penalty-free switching window. For deeper context see our energy switching guide (/bills-utilities/energy-switching-guide/).

Last reviewed:

·Estimated time: 21 days

The steps

  1. 01

    Find your current tariff details

    Locate your latest bill or log into your online account. You need your postcode, current supplier, tariff name, annual usage in kWh (or spend), and whether you have separate gas and electricity meters or a dual-fuel account.

    Official link →

  2. 02

    Compare deals on an Ofgem-accredited site

    Use a comparison site signed up to Ofgem's Confidence Code, or compare directly on supplier websites. Enter accurate usage figures — estimates based on a typical home can mislead. Check whether the deal is fixed or variable and whether exit fees apply.

    Official link →

  3. 03

    Apply to the new supplier

    Choose your tariff and complete the application online or by phone. The new supplier runs a credit check and may request a meter reading. You do not need to contact your old supplier to cancel — the new one handles the handover.

  4. 04

    Use your 14-day cooling-off period

    After signing up you have 14 calendar days to cancel without penalty under consumer contract rules. The switch may still begin during this window, but you can withdraw if you change your mind within the cooling-off period.

    Official link →

  5. 05

    Submit meter readings on switch day

    Your new supplier will give you a switch date (typically within five working days after the cooling-off period). Submit accurate gas and electricity readings on that day so neither supplier bills you for the same energy.

  6. 06

    Check prepayment meter rules if applicable

    If you have a prepayment meter, ask whether the new supplier supports your meter type or will install a smart or credit meter. Some switches require a meter exchange visit. Never attempt to remove or tamper with a prepayment meter yourself.

    Official link →

Common pitfalls

  • Comparing on non-accredited sites may hide the best deals or push commission-earning tariffs — look for the Confidence Code logo
  • Exit fees on fixed deals can wipe out savings — factor them in before switching, especially if you moved recently
  • Letting old estimated bills roll on after the switch date causes back-billing disputes — submit readings on the exact switch day

FAQ

How long does an energy switch take?
Most switches complete within 21 days: up to 14 days cooling-off plus around five working days for the handover. Complex cases involving prepayment meters may take longer.
Will my power be cut off during the switch?
No. The same physical supply continues — only the billing company changes. Your lights and heating stay on throughout.
Can I switch if I am in debt to my current supplier?
If you owe less than 28 days' worth of charges on a standard credit meter, you can usually switch. Larger debts or prepayment meter debt may block switching until a repayment plan is agreed.
Can I switch if I am already on a fixed tariff?
Yes, but early exit fees (often £25–£75 per fuel) may apply. In the last 49 days before your fix ends you can switch without penalty. Some suppliers also let you move to a new fix with them without charging exit fees — ask before you compare elsewhere.
Should I fix before the July 2026 price cap rise?
If you are on a standard variable tariff, compare whole-of-market fixes against the new cap rates before 1 July. Fixes can beat the cap when wholesale prices stay high, but the cap lags the market by several months — a fix is not automatically cheaper if prices fall later.
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