An image forming apparatus has a communication interface, a processor, and a storage unit. The storage unit stores a job log and a job log transmission program. The job log transmission program causes the processor to transmit a job log of a finished job via the communication interface to a charge server connected to a network. The job log transmission program causes the processor to execute the steps of: (a) via the communication interface, determining whether or not the charge server can receive the job log currently, and (b) if it is determined that the charge server can not receive the job log currently, keeping the job log to be transmitted in the storage unit and transmitting the job log kept in the storage unit to the charge server when a job log of a next job is transmitted to the charge server.