Stability of Slope is one of the most critical issues that should be adequately tackled in the field of geotechnical engineering. Slope stability can be analyzed using one or more methods. Analytical and numerical methods are available but numerical methods are quickly, reliable, accurate and so we are able to perform parametric and comprehensive study of slope stability with complex boundary conditions. In this study, numerical analysis by finite element software PLAXIS 2D shows the influence of water table and soil parameters like angle of internal friction and cohesion on slope stability. The influence of water table on efficiency of soil nailing in improving slope stability is also investigated. The analysis has been done using Mohr–Coulomb constitutive model. The slope stability analyses are performed to assess the safe and economic design of human-engineered or natural slopes.