How do I add money to my Apple Pay account?

Are you referring to the Apple Cash Card?

1. Open the Wallet App
2. Tap on Apple Cash Card
3. Tap on More (the 3 dots in the upper right corner)
4. Add Money
5. Enter the amount you want to add!

This will require a bank account connected to the Apple Cash Card.

If you're talking about adding money to your Apple Account:

1. Open the App Store
2. Tap on your Apple ID Profile in the upper right corner
3. Tap "Add Money to Account"
4. Enter the amount you want to add!

Hello ~ Also …take a look here:

Send and receive money with Apple Cash - Apple Support

Make purchases using Apple Pay

~Katana-San~