Apple Developer Enrollment: Membership Purchase
Part 3: Enrolling for the Apple Developer Program:
1.) Decide whether you'd like Automatic Renewal or not.
To enroll and pay for your membership, click the "Purchase" button. Don't forget: if you want your membership to be automatically renewed, check the Automatic Renewal box.
2.) On the next page, sign in with your Apple ID.
To complete your payment, enter your billing information and click Continue.
Apple should send you an email within 24 hours confirming that your Apple Developer Account has been created successfully.