This can be done from within your client area.

1. Login to your client area, click on Billing (you would find this within the navigation tools on the right hand side),
2. Click on Add/Update Card.
3. Once the new card details have been entered, click on Save/Update Card Details.

Can I setup automatic payments from my credit card?

You are able to do so if you have a card on file. Under My Details in your client area you can set the default payment method for your account to Credit/Debit Card. If this is done, payment will be taken automatically via the card on file three days before the invoice due date.