By default, subscriptions are charged monthly on the same day of the month the subscription started. # Billing day The “billing day” option allows you to set which day of the month the charge will be made. The first charge is made at the moment the subscription is initialized and from the following month the charge is made on the set day. If “billing day proportional” is selected, the first charge, made at the time of subscription, will be proportional to the remaining time in the month. If this option is not selected, the first payment will be at full value.