A method, system, and program for billing for service provided to an origin device according to the current caller billing plan. A trusted telephone network, including at least one service provider, receives a request for service from an origin device. The origin device is associated with a line number to be billed for according to a line subscriber billing plan. An identity of a caller requesting the service from the origin device is authenticated. Then, a billing plan associated with the authenticated caller identity is accessed and utilized to replace or supplement the line subscriber billing plan, such that billing for service provided at an origin device is specified according to the caller currently utilizing the origin device.