$142 - $665. On average, pool maintenance costs $256, with most homeowners spending between $132 and $381. This data is based on actual project costs as reported by HomeAdvisor members. While a swimming pool adds many years of fun and exercise to your home life, it needs to be maintained correctly and consistently.ou can manage the heating cost for your pool by not heating it year-round. If you only use your pool for entertainment, you are most likely not going to have pool parties in the dead of winter.