This study examines the effectiveness of implementing Activity-Based Costing (ABC) and Time-Driven Activity-Based Costing (TDABC) in Jordan’s private healthcare sector focusing on managing costs while maintaining quality care. A descriptive and analytical approach was adopted involving 213 individuals working in the financial affairs departments of private hospitals in Amman representing various types of institutions. The key variables of interest were the accuracy of cost measurement, expense reduction, cost allocation and various cost management approaches. The main findings indicate that implementing ABC and TDABC significantly improved cost management and cost reduction within these institutions. These systems have been effective in enhancing the accuracy of cost measurement, improving profitability, reducing unnecessary expenses, and achieving better cost allocation, thereby leading to better financial stewardship. This study underscores the critical importance of integrating these systems into healthcare financial frameworks. Moreover, it highlights the need for further training for financial managers and accountants to fully leverage these approaches and contribute to ongoing improvements in healthcare financial management. Additionally, this research presents empirical evidence from an underrepresented region where no prior studies have been conducted, thereby contributing to the existing body of knowledge and offering valuable insights for future initiatives in Jordan. The study also provides useful guidance for implementing these cost-management approaches more broadly in other regions and countries.