The construction of piles necessitates the inclusion of liners to prevent the collapse of soil and facilitate the penetration of the pile into the stable layer below. These liners, once installed along with the pile, also serve to protect the concrete from corrosion caused by aggressive soil. However, the presence of a mild steel liner impacts the vertical load-bearing capacity of the piles due to the interaction of soil and liner. This study investigates the influence of permanent liners on piles situated in aggressive soil within the western region of India. A series of vertical pile load tests were conducted on piles having 500 mm and 750 mm in diameter and 15 m long. Piles are installed in dense sand, followed by hard clay. Field test results comparison revealed that the absence of interaction between the soil and concrete led to a reduction in pile capacity close to the order of 21%. Further, the impact of permanent liners on non-displacement piles was assessed by conducting parametric studies by performing numerical analysis using a geotechnical finite element software.