If you use an itunes gift card will get a bill?

When you redeem an iTunes gift card, the full value of the card is credited to your Apple ID balance. You can then use this balance to make purchases from the iTunes Store, App Store, and other Apple services.

If you use your Apple ID balance to make a purchase that exceeds the amount of your balance, you will be prompted to enter a payment method to cover the remaining cost. This could result in a bill from your credit card company or other payment provider.

To avoid receiving a bill, you can make sure that your Apple ID balance is sufficient to cover the cost of your purchases before you make them. You can also set your Apple ID to automatically reload when your balance falls below a certain amount.