You answered this question 3 years ago:
I have two Itunes ID account, but the one on my computer has my gift card on it and I want the gift card on my phone with a different account please help
Here's your answer:
Apple does not allow you to transfer a Gift Card balance between accounts.
However, one option is to simply purchase the items on your computer but "gift" them to the Apple ID used on the iPhone
Open iTunes and click on the iTunes Store link in the sidebar.
Log in to the iTunes Store with the account from which you wanted to transfer money, if you aren't already.
Locate the items you would like to purchase and click the down arrow next to the price. Click on "Gift This..." on the menu and follow the instructions on the next page with the appropriate information.
I just tried the "gift this" option, but instead of reducing my iTunes gift card balance, my credit card was charged.
I want to use up my $56 balance on my "old" iTunes account (which my son also has access to), but I don't want him to see the items I've purchased. I want these new purchases to show up in my new Apple ID account on my iPhone. Do you have any suggestions?