With rapid urbanization, it has become important to look for a fast, reliable, easy, and environmentally sensitive foundation system. Helical pile is a deep foundation system consisting of a central steel shaft, with helical-shaped steel plates affixed to its body by welding. They have become popular over the last few decades in developed countries, with the advancement of machines that can generate high torque required for helical pile installation. In India, applications of helical piles are still in the elementary stage, and, currently, no Indian Standard code is yet available for their designing and application. They have multiple benefits over conventional piles. They are capable of resisting tensile, compressive, and lateral loads. In this study, the behavior of single-helix piles embedded in clayey soils has been assessed. 2D finite element analyses have been conducted to study the performance of helical piles subjected to both tensile and compressive loadings. About 150 models were created and executed in PLAXIS 2D for the parametric analyses by varying the design components like helix diameter, shaft diameter, and embedment depth. The changes observed in the ultimate capacity of helical piles with the variation in design components have been assessed. From the analyses, important observations with reference to failure criteria, failure mechanism, critical embedment ratio, and the extent of influence zone have been evaluated and presented in this paper.