The present study attempts to quantify the impact of shear modulus on the estimation of seismic active earth pressure by combining the slip-line method with the pseudo-dynamic approach. A detailed parametric study was conducted to obtain the influence of various parameters such as soil friction angle, wall inclination, shear modulus, amplification factor, and seismic accelerations. The inclusion of varying shear modulus in the analysis shows a marginal variation in the magnitude of active thrust on the wall under seismic activity. However, the effect of seismic accelerations and ground amplification cause a significant change in the seismic active earth pressure. Slip-line method used in the present study captures the actual failure surface during the analysis. The failure surfaces generated using this method are mostly bi-linear or non-linear for various wall inclinations under different seismic intensities.