You’ll have the option to charge subscribers either on a recurring monthly basis, or per post.
With monthly subscriptions, your subscribers will be automatically charged on the same date every month. If they subscribe during the founding period, they'll be charged on the day the founding period ends. If they subscribe after the founding period, they'll be charged at check out. Then, they'll be charged, each month, on that date.
With per post subscriptions, your subscribers will only be charged whenever you post new content to your Drip page.