Click the Billing Information link for any of your services.
Click the Payment Methods tab at the top of the page.
Click the Add a payment method link.
Enter your billing address information. Check the box Use this as my default billing address to have the address set as the default when adding/updating future payment information. Note: The billing address is used to calculate US sales tax when applicable. (Learn More)
Click the Next button. An address verification dialog may appear. If it does, select the address that most closely matches your billing address then click the Use this address button.
Verify that the billing address in the Billing Information section is correct. If it is not, click Edit to update it.
Under New Payment Method, enter your card details then click the Add card button.
In the next dialog that pops up, select each service you wish to assign the card to then click the Assign button.
In the confirmation dialog, click the Close button.
Click the Billing Information link for any of your services.
Click the Payment Methods tab at the top of the page.
Click the Add a payment method link.
Select the PayPal tab then click the Buy now with PayPal button.
Sign in to your PayPal account.
Click the Agree & Continue button.
Delete a payment method
Remove a credit/debit card or PayPal account from your available options. Note that you cannot delete a payment method tied to an active service; you'll need to change the payment method for the service first.