Objective: Determine the incidence of the cost system on the utility of the laundry Industrial Wash S.A.C., year 2018. Method: The research was qualitative. The sample was comprised of three workers from the accounting area and the owner. The techniques were the documentary analysis and the interview. Results: The costs were estimated based on the financial accounting data, obtaining an annual gross profit of S/ 14 308 307, an operating profit of S/ 13 422 474 and a net income of S/ 9 462 844. On the other hand, the estimate of costs under the work order cost system was S/ 14 524 658 per year, operating income of S/ 13 719 370 and net income of S/ 9 672 156. It was found that the difference of both methods was positive in favor of the cost system for work orders. According to the majority of those interviewed, the most appropriate costing method would be the work order costing system. Co...