Being a geosynthetic material, use of geogrid as soil reinforcement behind retaining wall has increased significantly, owning several advantages such as rapid construction and better seismic performance. The placement of geogrids in multiple layers stabilizes the soil and increases the stability of the structure. The study involves the most efficient and trustworthy method for numerical modelling of geogrid-reinforced retaining wall using finite element software. An attempt has been made to compare two distinct numerical models prepared using the OPTUM G2 computational program. In present work, assessment of retaining wall positioned with and without geogrid, subjected to different loading conditions of static and seismic have been carried out. The analysis is carried for 9 m height of wall, reinforced with geogrid of three definite lengths, i.e. 5 m, 7 m, 9 m respectively, placed perpendicular to the retaining wall. A relative study is conducted for unreinforced and reinforced retaining wall relying on stability parameters such as safety factor, failure surface and so on. Investigation of parametric analysis indicates that placement of geogrid is desirable in retaining wall as it enhances the safety factor. A notable percentage increment in safety factor is observed for a geogrid of 9 m length. Remarkable variation in failure surface is visualized for different loading conditions.