Tunnel construction is thought to be the trickiest and most complicated type of construction. The execution of these projects comprises significant challenges, difficulties and uncertainties. The stability of tunnel is mostly impacted by selecting proper excavation technique and its sequences during construction stage. The geological characteristics of ground primarily responsible for the disturbances created within the tunnel. With the diverse geology and tremendous overburden pressure of the Himalayan region, designing and building a railway tunnel is in and of itself a difficult undertaking. The finite element approach is used in this study for creating various 3D numerical models in MIDAS GTS NX software to examine the impact of excavation on tunnel stability. There are various excavation techniques such as sequential excavation method employing the tunnel boring machine (TBM) or the New Austrian tunneling method (NATM) with drilling and blasting. The models are then analyzed to choose proper excavation sequence considering the displacement of crown, ground deformation, and stress concentrations. The study’s findings suggest that the order and method of excavation might have a big impact on tunnel stability. Specifically, it is found that the sequential excavation method, which permits better control over ground deformation and stress concentration, offers superior tunnel stability when compared to other methods. In summary, choosing the right excavation technique and sequence is essential for guaranteeing tunnel stability. The result of this research will be beneficial for same ground strata enhancing safety and security.