How to switch energy supplier
Switching energy supplier is free and you only deal with the new supplier: it arranges the switch, which usually takes a few working days, with no break in your supply. You have 14 days to change your mind. Check for an exit fee first: standard variable tariffs have none, and fixed deals have none in their last 49 days.
By the billsqueeze team · Facts checked: 31 October 2026 · Updated:
- You only contact the new supplier; it handles the switch.
- It usually takes a few working days, with no break in supply.
- You have 14 days to change your mind.
- No exit fee on standard variable tariffs, or in the last 49 days of a fixed deal.
Before you switch
- Find your yearly usage in kWh on a recent bill or in your supplier’s app.
- Check for an exit fee. Standard variable tariffs have none. Fixed deals often do, except in their last 49 days.
- Compare the total yearly cost, including standing charges, not just the unit rate.
How switching works
- Choose a new tariff and sign up with the new supplier. You don’t need to contact your old one.
- The new supplier arranges the switch. It usually takes a few working days, and your supply isn’t interrupted.
- Give a meter reading on the switch day, so your final and first bills are accurate. Smart meters may send it automatically.
- Get your final bill from your old supplier, and any credit back.
Your rights
- You have 14 days to change your mind after agreeing to a new contract.
- When a fixed deal ends, your supplier must write to you 42 to 49 days before, and you can leave without an exit fee in the last 49 days.
- If something goes wrong, complain to the supplier first. After 8 weeks you can go to the free Energy Ombudsman. See complaints.
Is now a good time?
The price cap for January to March 2027 is announced on 25 November 2026, and Cornwall Insight forecasts a rise to about £1,999 a year for a typical home. If you’re thinking about a fixed deal, compare it with the cap and the forecast: see fixed or variable?
See the price cap where you live
Unit rates, standing charges and a typical bill for all 14 regions, with a calculator.
Common questions
How long does it take to switch energy supplier?
Usually a few working days. Your supply isn’t interrupted.
Do I need to tell my old supplier?
No. Your new supplier arranges the switch and your old supplier sends a final bill.
Will I pay an exit fee?
Not on a standard variable tariff, and not in the last 49 days of a fixed deal. Earlier, a fixed deal may have an exit fee.
Can I change my mind?
Yes, within 14 days of agreeing to the new contract.