Switch to a different billing account
If you're the subscriber, you can add your organization to an existing billing account in My Xero. A billing account holds your payment details for your Xero subscription. You can have a billing account for each organization, or one account that pays for many organizations.
From the header, click the list icon , then select My Xero.
Find the organization you want and click its Info link.
Click Options, then select Change billing account.
Click Switch to this account to add your organization to an existing billing account.
Enter new billing contact details, click Continue, then enter payment details to create a new billing account.