What information do I need to switch energy suppliers?

You will need the following details to switch energy suppliers using Which? Switch:

• Postcode (as energy prices vary between regions). If you don't know this yet (if you've just moved house for example), we'll ask for the area you live in instead.
• Current energy supplier's name.
• The name of your current energy tariff.
• How much gas and electricity you use each year (or how much you spend).
• Your preferred energy bill payment method (you'll need your bank or credit card details to hand if you want to pay by direct debit or continuous authority credit card).

If for some reason your exact meter can't be located during switching, you may also need to provide your gas and/or electricity meter numbers (known as MPRN and MPAN numbers).

To get the most accurate idea of how much money you'll save by switching, it's best to have recent gas and electricity bills to hand. You can, however, also complete the switching service with estimates of your gas and electricity usage/bills.