Your credit card or bank account will not be charged until the end of the first billing cycle unless you choose to buy postage.
Free postage is a one time offer only.
Free postage credited to your account at the time of registration will expire 30 days after it was credited. Any unused free postage in your account at that time will expire and be forfeited. If you cancel during the first billing cycle, your account will not be charged service fees. Your first service fee will be billed the day after your billing cycle. The billing cycle ends one month after you sign up.