PROBLEM TO BE SOLVED: To attain the support promotion of a deposit alternative payment service, and to calculate the reasonable value of a non-refundable compensation on which the value of the width a rental house is reflected for each tenant who uses the task.;SOLUTION: This device is provided with a DB120 in which tenant information including tenant identification information is registered, a DB121 in which property information including the house rent and width information of a rental house is registered, a means for calculating the execution value of a non-refundable compensation by using the house rent and width information and a predetermined calculation reference value, and for registering it in a storage medium 12, a means for registering the tenant information and the property information and the execution value in the storage medium 12 by associating them with each other, a means for deciding a compensation sum to be paid to a landowner based on the repair information of the house accompanied with the leaving of the tenant, a compensation information registering means for registering the compensation paid to the landowner and the non-refundable compensation paid by the tenant in the storage medium 12 by associating them with the tenant identification information and a calculation reference value updating and registering means for updating the calculation reference value by using the registration information of the compensation information registering means and the house rent and width information of the property, and for registering it in the storage medium 12 as the next reference value.;COPYRIGHT: (C)2005,JPO&NCIPI
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