Your billing cycle is determined by the date that you subscribe as well as the membership option you select.
If you choose a monthly membership, you will be billed on the same day the following month. If that day does not exist, you will be billed on the first available day. (For example, if you sign up on March 31st, you would be billed for the next month on April 30th.)
If you choose a yearly membership, you will be billed on the same day the following year.
If you choose an installment option, you will be billed equal payments every month until you have completed your installments. Then you will not be billed again until your account renews the following year.