A device (D) is dedicated to controlling the transfer of units of connection time for a communication network (N1) having accounting and/or billing equipment (ABE1). This device (D) includes processing means (PM) that, when they receive a request to transfer a chosen quantity of units of connection time to a beneficiary account associated with the communication identifier of a first communication terminal (BT) connected to a communication network (N1), responsible for accessing a first set of accounting and/or billing equipment (ABE1) managing the account of a donor associated with the communication identifier of a second communication terminal (DT) connected to the communication network (R1), to verify whether the quantity of units of connection time that the donor's terminal (DT) has is at least equal to the chosen quantity, and if so, to order the first set of equipment (ABE1), which also manages the beneficiary's account, to transfer in real time a quantity of units of connection time at most equal to the quantity chosen from the donor's account to the beneficiary's account.