Adding a new payment method

"New" implies there is an old one. Read below about issues and solutions:

See this article for information about updating payment methods on various platforms (iPhone, Mac, etc.): If you need to change or update your Apple Account payment method - Apple Support

Here is how you update your payment method on an iPhone or iPad:

1. Open the Settings app.

2. Tap your name.

3. Tap Payment & Shipping (formerly Media & Purchases). You might be asked to sign in with your Apple ID.

4. Tap Add Payment Method, enter the new payment method, then tap Done.

5. Tap Edit.

6. Tap the red delete button next to the old payment method, then tap Delete.

Also note:

1) ”If you change your address, the credit or debit card information that you use with your Apple Account might be automatically updated by your financial institution, and you don't need to take action.” (More about that here https://discussions.apple.com/thread/256197170?answerId=261707800022&sortBy=oldest_first#261707800022 )

2) “If there's an issue [such as you having a subscription or being a Family Sharing Organizer], add a new card first, then remove the old card."

Why mot?

What happens when you try?

Do you get an error? If so, what does it say?

click here ➜ Add a payment method to your Apple Account - Troubleshooting - Apple Support