How do I find out a unpaid balance owed to apple
Need to know how much to pay
Question marked as
It's likely to be the value of your last purchase (or purchases if you did some close together) :If your payment method is declined, or you have a billing issue with a previous purchase in the iTunes Store - Apple Support
To see which order you need to pay for, view your purchase history. Your purchase history shows your most recent purchases first. To see the details of any purchase, tap the > to the right of the total billed charge on your iOS device or click the Order ID number to the right of the order date in iTunes on your Mac or PC.
If you're using Family Sharing, and see this error message, the family organizer must update their billing information.