Green Banking Practices (GBP) would help to anass.hamad@gmail.com achieve Banking Environmental Performance (BEP). Therefore, the present research aims to find this nexus in the Saudi banking sector by applying the mediating role of Banking Economic Sustainability (BES). For this purpose, primary data was collected from 356 employees of the banking sector in Saudi Arabia, and Structural Equation Modelling (SEM) is applied for hypothesis testing. The findings disclose that GBP improves both BEP and BES and also BES enhances BEP. Thus, BES moderated the relationship between GBP and BEP. The research recommends the Saudi banking sector to further adopt environmentally sustainable practices to achieve their economic sustainability and environmental performance. Thus, the Saudi banking sector could play its role in achieving environmental sustainability in Saudi Arabia by reducing energy consumption and pollution emissions from banking operations.