Methods and apparatus for billing communications services through the use of AIN functionality are described. Billing information is communicated to a service control point by placing one or two calls to a service subscriber to be billed for a service. The calls encounter a trigger set at a switch. In response to trigger activation the switch sends a message to the service control point. The message includes billing information placed into a billing data field of the call. The service control point extracts the billing information received in the message or messages from the switch and bills the called service subscriber based on the received billing information. In the single billing call embodiment the device initiating the billing call is responsible for determining the amount of time for which the service is to be billed, e.g., conference duration, in addition to other billing information.