This comprehensive study scrutinizes the strategic investment in machinery for reconditioning mining equipment at PT. XYZ, addressing financial, strategic, and sustainability dimensions. In light of escalating environmental concerns and the imperative for operational efficiency, this research is pivotal in guiding sustainable investment decisions within the mining sector, aligning with broader economic and environmental goals. Employing a robust mixed-methods approach, the research intricately combines qualitative strategic frameworks with quantitative financial evaluations. Strategic analysis, encompassing SWOT and porter's five forces, provides a nuanced understanding of the competitive landscape and internal capabilities. Concurrently, the financial viability of the investment is scrutinized through sophisticated capital budgeting techniques such as payback period, discounted payback period, return on investment (ROI) net present value (NPV), internal rate of return (IRR), and weighted average cost of capital (WACC). A meticulous sensitivity analysis further augments the financial evaluation, examining the investment's resilience to fluctuating market conditions and varying assumptions, thereby enhancing the reliability of the financial projections. In addition to financial metrics the study delves into non-monetary considerations, emphasizing the investment's alignment with PT. XYZ's strategic objectives, its potential to foster operational efficiencies, and its contribution to environmental sustainability. These aspects are critical in the current business landscape, where financial performance is inextricably linked with sustainable practices. The results reveal a positive NPV of IDR 64.27 billion from a total investment of IDR 76.63 billion, a payback period of 2.5 years, and an IRR of 35.1%, significantly surpassing the WACC benchmark of 12.5% plus a 3% risk. Moreover, the investment is poised to enhance PT. XYZ's operational efficiency, reduce environmental impact, and contribute to the sustainable development of the mining industry. This research offers profound insights into the strategic decision-making process for capital investments in the mining sector. It underscores the significance of a holistic approach that integrates financial performance with sustainability considerations, providing a valuable framework for business leaders in navigating the complexities of contemporary business challenges.