Abstract: The process for usage-dependent determination of costs in making communication links between at least three communication facilities (12) of a group or network (10), which are connected with each other by usage-independent fixed lines, includes assigning a link logical record to each communication link made between the communication facilities (12) and evaluating each link logical record according to usage for usage-dependent determination of costs, so that individual user costs may be reduced according to usage. The link logical record includes all information clearly defining the link including user information and communication path information consisting of a sequence of code numbers describing the sequence in which the other communication facilities are connected when the link is made as the path information.