An arrangement for gathering data from a communication network (101) includes a server device (102) connected to the communication network. The arrangement includes in user terminal devices (107,108) an interface application arranged to transmit to the server device first data related to telecommunication services provided by the communication network. The server device is arranged to produce second data, e.g. fees payable due to the usage of the telecommunication services, at least partly on the basis of the first data and to make the second data accessible to users (109,110) of the user terminal devices. The user terminal devices are utilised in gathering data from the communication network and thus the data is automatically gathered from those locations of the communication network in which the network and the telecommunication services are being used and thus no separate devices for gathering data are needed.