Achieving financial sustainability is a critical challenge for Public higher education institutions worldwide. This study aims to provide modified strategic planning tools for planning financial sustainability in higher education institutions. The paper employs modified forms of three strategic planning tools: a strategy map (SM), the balanced scorecard (BSC), and business-model-canvas (BMC), which were applied to support the analysis of planning financial sustainability at King Abdulaziz University (KAU). These tools enhance the planning process and contribute to the outcomes. The paper also draws a roadmap of key milestones for financial sustainability at the university by identifying sources and indicators of the university's financial capacity. This paper contributes to the literature on financial sustainability in higher education institutions and offers novel insights for other universities that seek to adopt similar plans. Furthermore, four recommendations are suggested to boost business development and connect with the university investment network. These recommendations involve investing in competent human resources, increasing financial assets, and utilizing technical capabilities. Further research includes examining the applicability of this novel approach in other contexts and identifying potential challenges and limitations of implementing and achieving financial sustainability.