If I decide to switch my business energy to npower, do I need to notify my existing supplier?

Yes if you are still in contract. Most suppliers require notice that you want to switch supply. If you don’t provide notice, they could try to stop you leaving!

We will be able to inform your existing supplier of your wish to switch. However, you will need to be in a position to leave them by giving the notice period as set out in your contract and clearing any outstanding bills on the account.

You may still need to notify your existing supplier even if you are not in contract, please check your Terms & Conditions.