A billing system includes a telephone, a detector operably associated with said telephone for detecting when the telephone is in use and generating a signal in response to the use, a first cpu operably associated with said detector and having billing software resident on the first cpu for enabling logging of client data, user data, wherein the billing software is automatically initiated in response to the signal and prompts a user to select one of a logging and no logging of the use, the billing software includes an accrual associating device for accruing an amount of time of the use and associating the time with one client upon selection of the logging and the billing software includes a writing storing component for writing and storing data corresponding to the amount of time and the client in a memory associated with the first cpu.