To provide a communication service expense distribution system that prevents both of a user of communication facilities such as a resident of multiple dwelling houses and a person who introduces the communication facilities such as an owner from excessively bearing expenses in the supply of communication services such as the Internet communication to the multiple dwelling houses.

Information is stored, where the information contains the certain fixed amount of minimum charge that is paid by the person who introduces the communication facilities such as the owner for each month, a fixed charge for use that is paid by the user of communication facilities, and the like. Based on the stored information, a restoration charge for distributing to the person who introduces the communication facilities is calculated based on the stored information. A charge that is borne by the person who introduces the communication facilities is calculated based on the stored information on the fixed amount of minimum charge and the calculated information on the restoration charge. The calculated information on the charge that is borne by the person who introduces the communication facilities is outputted.