How does the Rackspace Cloud bill me?
The Rackspace Cloud bills you every 30 days based on the day you sign up for the service. Your credit card will be charged for your monthly hosting fee on the first day your account becomes active. After 30 days have gone by you will be billed again for the next month of service. The exact charge will be based on recurring charges in addition to whatever additional fees you have incurred during that previous month.