For help with billing, call the helpdesk on 0845 154 8844 or 8844 from your BT One Phone and select the billing option. This line is open from Monday to Friday 8:00 am to 6:00 pm, and on Saturdays from 8:00 am to 1:00 pm.
For in depth billing data, go to the BT One Phone portal, where you can analyse call usage and charging at a company and individual user level.
Or to see all of your One Bill details online, including VAT, and to make payments, you can go to the BT Business
eBilling Portal on
My BT Business account. You can also opt out of paper billing here.