If you have an iPhone, Apple Pay is the easiest way to send money to other iPhone users and pay with your phone or Apple Watch. If you don’t want to use a credit card, you can add money to your Apple Pay Cash card from a debit card.
How to Add Money to Apple Pay Cash
If you live in a supported country, here's how to add money to your Apple Pay Cash account.
Make sure Apple Pay Cash is set up. Tap Settings > Wallet & Apple Pay and tap the Apple Cash switch to turn it on. Follow the instructions to verify your identity.
An Apple Pay Cash card needs to be added to the Wallet app. Open the Wallet app and tap on the Apple Pay Cash card.