Generally speaking, your cost will be between $1,000 and $2,500 for the installation alone. Add materials, and you could end up above $4,000 to install a new in-ground pool liner. The installation cost will range widely depending on the pool size, shape, and condition. So will the time of year the local pool liner installer does the work. If you choose a thicker liner, it’ll last longer and won’t tear as easily, but it’ll also cost you more and be harder to install. Vinyl liners are essential for any pool, in-ground or above-ground, that doesn’t already provide waterproofing, like concrete, gunite, or fiberglass pools.