How do I change method of payment for iCloud+?

Hi ZipZip1350,

Thank you for using the Apple Support Communities! To change or update your payment on your iPhone, the steps from the article below can help:

If you need to change or update your Apple ID payment method

1. Open the Settings app.

2. Tap your name.

3. Tap Payment & Shipping. 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.

Hope this helps!

Have a great day.