This study investigates the impact of intellectual capital on the sustainable performance of banks in Saudi Arabia, focusing on the period from 2012 to 2022. Utilizing data from 10 major Saudi banks, the research examines how different components of intellectual capital—Human capital efficiency (HCE), Structural capital efficiency (SCE), and Capital employed efficiency (CEE)—influence key financial performance indicators such as return on equity (ROE) and Net profit margin (NPM). The study is grounded in the resource-based view of the firm, which suggests that a firm’s internal resources can provide a sustainable competitive advantage. The analysis employs panel data techniques, including fixed and random effect models, to assess the relationships between intellectual capital components and bank performance while controlling for variables like bank size (SIZE), financial leverage (LEV), gross domestic product growth (GGDP), inflation (INF), and the impact of the COVID-19 pandemic (COV). The findings reveal that intellectual capital significantly enhances bank performance in Saudi Arabia, with human capital efficiency showing the most decisive influence on ROE and NPM. Structural capital and capital employed efficiency also contribute positively but vary in their impact on different performance measures. This research contributes to the theoretical and practical understanding of the role of intellectual capital in promoting sustainable banking practices. It underscores the importance of the strategic management of intellectual capital in enhancing financial performance and achieving sustainability goals, particularly in the context of Saudi Arabia’s Vision 2030. The study’s insights are relevant for bank managers and policymakers who leverage intellectual capital for economic diversification and sustainable development.