If you sign up for dispatch service when you purchase your system (recommended), you will be charged for the first month at the time of purchase. However, your service will start only when you activate it. For example, if you purchase your system on June 1 and activate your service on June 15, your first month will begin on June 18 (after the 72 hour wireless security system practice period has ended). Your card will then be charged again just before July 18, August 18 and so on.