How to Switch Energy Supplier: A Step-by-Step Guide
Switching energy supplier is one of the simplest ways to review what you pay. The process is regulated, there is no interruption to your supply and you do not need to contact your old supplier. Here is how to do it with confidence.
Before you start
Gather these details so you can compare accurately:
- Your postcode and the name of your current supplier and tariff.
- Your annual usage in kWh for gas and electricity, shown on your bill or online account. If you are unsure, use meter readings and your past statements to estimate it.
- Your current unit rates and standing charges.
- Whether you pay by direct debit, on receipt of bill or on a prepayment meter.
- Whether you are in credit or owe money, and any exit fees on your current deal.
Step 1: Compare deals
Use a comparison service accredited by Ofgem under its Confidence Code, and enter your real usage rather than a default figure. Compare unit rates and standing charges as well as the estimated annual cost, because the annual figure depends heavily on the usage you entered. Also look at what happens when the deal ends and whether there are exit fees.
Step 2: Choose and sign up
Once you have picked a tariff, you sign up with the new supplier. They arrange everything with your old supplier. You do not need to cancel anything yourself. Check you receive written confirmation of the tariff details.
Step 3: The cooling-off period
You normally have a 14-day cooling-off period after signing, during which you can cancel without penalty. The switch itself should usually complete within five working days after the cooling-off period, unless you ask for it to be sooner.
Step 4: Take final readings
Take meter readings on the day of the switch and send them to both suppliers, or submit them through the new supplier's account. This ensures your old supplier bills you only for what you used and your new supplier starts from the correct point. Photograph your meter as proof. Our guide to taking meter readings shows how.
Step 5: Watch for your final bill and any credit
Your old supplier should send a final bill within six weeks of the switch. If you are in credit, they should refund it. If you owe money, you will need to settle it. Keep copies of the readings you submitted in case of disputes.
Things that can complicate a switch
- Debt: if you owe your current supplier a significant amount, the switch may be blocked until it is repaid or an arrangement is in place.
- Prepayment meters: switching is often still possible, but check the process and any debt on the meter.
- Renting: if you pay the bills directly, you can usually switch. Check your tenancy agreement for any restrictions.
- Smart meters: modern smart meters usually keep working in smart mode when you switch. See our smart meter guide.
If something goes wrong
Complain first to your supplier. If it is not resolved within the time allowed, you can take your complaint to the Energy Ombudsman, which is free to use. Keeping records of your readings, emails and confirmation letters makes this much easier.