Charging Apple Care+ to Apple account balance instead of credit card
From reports online, it appears that if I subscribe to yearly Apple Care+, the first payment will always be charged to my credit card on file as opposed to my Apple account balance. Subsequent payments will be to my account balance if it covers the full amount, but not the first yearly payment.
Similarly if I subscribe monthly, the first payment is charged to credit card, then subsequent payments to account balance.
If I subscribe to monthly Apple Care+ and then after the first month, change to yearly Apple Care+, would that first yearly payment be charged to my Apple account balance or my credit card?