This study investigates the influence of fault zone width on fault rupture propagation through a uniform soil layer brought by dip-slip faulting. A 2D numerical model consisting of the elastic bedrock, fault planes, underlying a homogeneous soil layer is developed using ABAQUS. The soil is modelled using Moh-Coulomb model whereas, linear-elastic model is defined for the rock. The analysis demonstrates that wider fault zones result in a broader distribution of surface rupture, dispersing deformation over a larger area. In contrast, narrower fault zones localize ground surface deformations, leading to more concentrated rupture zones. The surface deformation on the footwall varies between 35–75 m, depending on the width of the fault zone and fault type. Additionally, plastic shear strain development in the soil during normal faulting with wider fault zones reveals the formation of grabens, a characteristic feature of extensional tectonics. These findings provide valuable insights into fault rupture behavior and their impact on ground surface deformation.