How To Pay

By Direct Debit

If your payment is by Direct Debit then no further action is required from you, other than making sure that your payment details are up to date. If your Direct Debit details have changed, you can update this information by contacting Customer Services. You will need to have your Demon hostname and security phrase or your Demon account number and postcode available to change your details.

Pay Online

If you wish to make a payment online towards your Demon bill, please visit and follow the instructions to make a secure payment. Your payment will take three working days to appear on your Demon account.


For BACS (Bankers Automated Clearance System) payments, our bank details are:

Barclays Bank plc
Edgware Road/Marble Arch CRP
131 Edgware Road
W2 2HT

Sort Code: 20-65-63
Account Code: 20864668
IBAN**: GB52 BARC 2065 6320 8646 68

If paying by BACS, please make sure you complete a remittance advice slip, quoting your Demon account number and the invoice number to which your payment relates. This will allow us to allocate your payment to the relevant invoice.

Alternatively, please send a copy of the relevant invoice together with confirmation of the BACS payment. The remittance advice slip/copy invoice should be sent to:

Remittance Advice
P.O. Box 25230
G2 5XY

You can also send your remittance advice slip by email to

Advice and Enquiries

Our customer service advice line 0345 272 2666 is open from 8am to 8pm, Monday to Saturday. We are happy to answer any questions about your invoice or our services, and can help you with any of the following:

• Billing enquiries
• Payment options
• Setting up a Direct Debit payment for your account
• Change of address
• Service amendments
• General enquiries

Alternatively you can write to us at:

Demon Customer Services
Finsbury Tower
103-105 Bunhill Row

* The Bank Identifier Code, also known as a ‘BIC’ or ‘BIC code’, is a worldwide standard used by financial institutions. It helps identify a specific branch or payment centre when processing automated transactions.

** An International Bank Account Number (IBAN) is a worldwide standard for numbering bank accounts. It functions like an addressing system in support of cross-country and international payments.