Here at Perma Pools, our mission as educators in the pool industry is to answer all your questions—the common, the technical, and even the bizarre. The most common question? Cost. Whether vinyl liner or concrete or fiberglass pools, whether extravagant or minimalistic aesthetics, people want to know about how much they're going to spend. You ask; we answer. How much does an inground pool cost? Most vinyl liner pools cost $65,000 - $85,000 upfront and $11,500 in maintenance over 10 years. Fiberglass pools cost $75,000 –$100,000 upfront and only $3,760 in maintenance over 10 years.