PROBLEM TO BE SOLVED: To develop a breakdown of a amount collected as a safety cooperation membership fee in the construction industry according to a predetermined allocation rate according to a purpose, and to generate a safety cooperation membership fee breakdown management device as an accounting subject. Provide a safety cooperation membership fee breakdown management method and a safety cooperation membership fee breakdown management program. SOLUTION: This is a processing method of a safety cooperation membership fee breakdown management device, in which purchase data including the purchase amount is acquired, and a deduction that is the collected amount of the safety cooperation membership fee based on the payee master and the purchase data. Acquire the deduction detail data including the amount, and based on the supplier master and the safety cooperation membership fee allocation rate master, acquire the deduction detail breakdown data including the allocation amount, which is the breakdown for each item for the deduction amount, and obtain the safety cooperation membership fee. Create allocation journal data based on the allocation rate master and deduction item breakdown data. [Selection diagram] Fig. 2
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