On the bill pay page, choose your payment amount from either the full current balance due or another amount. (Note: You cannot schedule a payment in advance using Apple Pay, so make sure to pick today’s date as the Payment Date.)
Under Payment Method, select Apple Pay. Click Continue.
Review your Apple Pay card and billing and contact information. Touch your finger on the home button to Pay with Touch ID.
A confirmation message will appear.
What Devices Can I Use to Pay My Bill with Apple Pay?
Apple Pay is currently available on the following devices:
iPhone 7 Plus
iPhone 6s Plus
iPhone 6 Plus
iPad Pro (12.9-inch)
iPad Pro (9.7-inch)
iPad Air 2
iPad mini 4
iPad mini 3
Apple Watch (paired with iPhone 5 or later)
Apple Watch Series 2
Apple Watch Series 1
Apple Watch (1st Generation)
MacBook Pro with Touch ID
Any Mac introduced 2012 or later (paired with an Apple Pay-enabled iPhone or Apple Watch)