This study examines the slope stability of a three-layered soil slope with a soft soil band between two hard c-ϕ soil layers that are subjected to pseudo-static loading conditions. The study utilizes the strength reduction method (SRM) integrated with the finite element analysis (FEA) using upper and lower bound techniques to compute the factory of safety (FOS) of soil slope. A detailed parametric analysis examines the soft band soil layer impact on FOS, focusing on the slope angle (β2) and soft band inclination (β1). Soil strength parameters for the top and bottom layers include cohesion (c1 and c3) and internal friction angles (ϕ1 and ϕ3), while the soft band is characterized by undrained shear strength (Su) and varying horizontal seismic acceleration coefficient (kh). The findings indicate that strengthening the bottom layer (c3 and ϕ3) and the soft band improves slope stability, raising the factor of safety (FOS) as kh increases. Conversely, a steeper slope angle (β2) and higher kh significantly reduce the FOS of the soil slope. Furthermore, the presence of the soft band layer introduces variations in potential failure plane within the soil slope, and mostly the slope failure has been noted along the weak soil layer. The outcomes of this study can serve as theoretical guidelines for preliminary design and provide an efficient tool for practitioners to evaluate the impact of soft band on the slope stability under pseudo-static loading conditions.