To provide a billing management system capable of managing billing conditions corresponding to the date and time in a lump.

A billing management system 1 includes: an image formation device 26 for forming an image; receiving means for receiving an instruction for forming an image by the image formation device 26 from a user; a management device 12 for managing the date and time when the receiving means receives an instruction and a billing condition in association with each other; and a billing information transmission device 24 for referring to the billing conditions managed by the management device 12 and transmitting billing information according to a billing condition corresponding to the date and time when the receiving means receives the instruction.