RumahKaos55 is an MSME in Dairi Regency specializing in the sale of screen-printed t-shirts. Currently, RumahKaos55’s sales and promotion activities are conducted manually via social media; consequently, processes such as order recording, inventory management, and sales report generation are inefficient and prone to data loss. This study aims to design and develop a web-based sales information system to streamline transaction processes and data management for RumahKaos55. The Waterfall development method was employed, encompassing the stages of requirements analysis, system design, implementation, testing, and maintenance. The system was developed using PHP with the Laravel framework and a MySQL database, integrating the Midtrans payment gateway to facilitate online transactions. The study resulted in a sales information system design capable of automating business processes, simplifying product and order management for the business owner, and generating accurate sales reports. In conclusion, the implementation of this digital sales information system has proven effective in enhancing operational efficiency and expanding RumahKaos55’s market reach amidst increasingly competitive business conditions.
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