How long does switching energy supplier take?
Switching energy supplier is usually straightforward and should take up to 5 working days once you agree to move. Your new supplier normally manages the switch with your old supplier, so you do not need to contact your previous supplier separately. You can usually choose when you want the switch to happen.
Get these ready before you start
- Annual electricity usage in kWh — usually shown on your latest bill, annual statement or supplier app.
- Annual gas usage in kWh — use your actual annual consumption rather than an estimated monthly figure where possible.
- Your postcode and payment details — these are commonly needed when comparing and setting up a new energy tariff.
- Your MPAN and MPRN supply numbers — these identify your electricity and gas supplies and can be found on your energy bill. Your new supplier will also need information about your current supplier, tariff and energy usage.
Check for exit fees first
If you are on a fixed energy tariff, check your contract for any early exit fee before switching. The exact amount varies by supplier and tariff, so do not assume it will be £30–£75 per fuel. Ofgem requires any applicable exit fee to be shown in your tariff information. Work out whether the potential annual saving from switching outweighs the cost of leaving early.
- Compare energy tariffs using our Tariff Finder — look at the unit rates, standing charges, tariff length and any exit fees rather than comparing only the estimated annual price.
- Choose your new energy supplier and tariff online — provide the requested account and payment information and confirm the switch.
- Your new supplier arranges the energy switch — they contact your existing supplier and manage the transfer, so you normally do not need to cancel your old supply yourself.
- Your switch should normally complete within 5 working days — Ofgem says domestic energy switches should take up to five working days, although you can request a later switching date.
- Submit a meter reading around your switch date — this helps both suppliers establish an accurate opening and closing position. With a smart meter, readings may be sent automatically, but check that communication is working correctly.
- Check your final bill and recover any credit — your old supplier should issue a final bill within 6 weeks of the switch. If you are in credit, the supplier should automatically refund the balance, with the guaranteed standard requiring a refund within 10 working days of the final bill.
