Billing occurs monthly at the time that gifts are sent.
Your credit card on file will be charged as gifts are sending - when the “auto-send at” time passes on a gift.
You will be billed the delivery fee for the total number of gifts set to be delivered, (or the minimum on the account, if you have fewer contacts enrolled than the minimum).
If some of your gifts fail to deliver, a credit for those gifts will be added to your account to be applied to your next gift delivery.
Learn more about gift delivery timing and billing here.