The results showed that poor financial management is a major obstacle to the development of laundry service businesses in Makassar City. Weaknesses such as unsystematic financial recording, mixing personal and business finances, lack of financial planning, and poor cash flow management can lead to business instability. In addition, reliance on personal capital, lack of understanding of financial management, and minimal use of technology further exacerbate this condition. Therefore, to improve the sustainability of laundry businesses, businesses need to implement better financial systems, improve financial literacy, and utilise technology so that businesses can grow more stable and competitive in the market. Good financial management is essential for the sustainability of laundry service businesses in Makassar City. Business owners need to implement sound financial planning, systematic recording of transactions, and separation of personal and business finances to maintain business stability. Cost-efficiency strategies, such as the use of energy-efficient equipment, bulk purchasing of raw materials, and utilisation of technology, also play a role in increasing profits. In addition, investment in business development and digital marketing can help laundries grow and compete in a competitive market.