An information processing device includes: a detecting unit configure to detect, with regard to a plurality of wireless terminal devices sharing a usage right of subscription authentication information relating to a mobile network operator which provides wireless connection services, transfer of the usage right among the wireless terminal devices; and a calculating unit configured to, in the event that transfer of the usage right is detected, calculate fees relating to the subscription authentication information occurring after the transfer, based on billing information set for the wireless terminal device to which the usage right has been transferred.