The payroll system is a continuous process related to employee management. Processing employee data apart from calculating the amount of salary to be received and employee income tax, the payroll system is also used to allocate labor costs to products. Payroll data management requires an information system that can manage payroll data accurately and on time. PT Langgeng Engineering Teknik Indonesia is a company engaged in general trading, supplying industrial goods, infrastructure, fabrication, mechanics, electrical and maintenance services and pinting really needs a computerized payroll system by managing employee attendance data and working hours. The payroll system using the Waterfall method makes it easier for companies to manage employee salary data so that they can obtain precise and accurate salary calculations