Depending on your selected payment method, see -> Terms & Conditions.
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Apple will charge your selected payment method (such as your credit card, debit card, gift card/code, or other method available in your Home Country) for any paid Transactions, including any applicable taxes. If you have also added it to your Apple Wallet, Apple may charge your selected payment method in Apple Wallet using Apple Pay. You can associate multiple payment methods with your Apple ID, and you agree that Apple may store and charge those payment methods for Transactions. Your primary payment method appears at the top of your account settings payments page.
If your primary payment method cannot be charged for any reason (such as expiration or insufficient funds), you authorize Apple to attempt to charge your other eligible payment methods in order from top to bottom as they appear on your account settings payments page.
Get more help -> Apple Support