Your Pro subscription will automatically renew each month unless you cancel your subscription prior to the expiration of your subscription term. Renewals are billed 1 day after your prior term expires.
For example, if you purchase a 1 month subscription on July 30, your initial subscription term will expire on August 30, and you will be charged the automatic renewal rate of on August 31.
Thereafter, you will be charged on the same day each month unless that particular day does not occur in a given month, in which case you will be charged on the first day of the following month. In this example, the next renewal payment would be on October 1 because there are not 31 days in September.
Thereafter, payments would occur on the first day of each month.