An inground pool costs on average $58,500 to install a basic pool, with most homeowners spending between $46,750 to $79,500. The figure averages across the three major pool types – fiberglass, concrete and vinyl liner and is based on cost for materials for a small / average size perimeter pool. Basic pool care, increased utilities, and repairs add $2,500 to $5,000 to the annual expense of pool ownership.