Check to see if you have tier rates for gallons used. If the pool puts you into the next bracket, (or 2) all water used after it will also be more. If your water cycle is on 3 months like many, that can equate to a bunch depending on the timingI'm trying to prepare for any easy-to-overlook expenses from now until I jump into the pool for the first time
*dang it Marty beat me. Lol.
The online calculators usually miss this. My Heat Pump didn’t cost as much as it did by itself. But once we were already in the higher bracket with the ACs running, it cost a small fortune.