Purpose: The objective of this thesis is to estimate and compare the capital requirements of an SME portfolio belonging to a Lebanese Commercial Bank under different regulatory frameworks, Basel I, Basel II and Basel III, in addition to illustrating the calculation of the capital adequacy ratio to comply with the requirements of BDL and BCCL. Design/methodology/approach: The sample used consists of a portfolio of loans granted by a Lebanese commercial bank to 1,099 different clients as of June 30, 2017. The study aims first at demonstrating the several approaches (Standardized Approach, IRB ...