It depends on the size of your pool, but it is generally safe to say that your electric bill will go up by at least $100 a month if you have an in-ground pool. If you have an above-ground pool, your electric bill will be even higher, since the pump has to run constantly to keep the water circulating. If you're trying to save money on your electricity bill, it might not be worth it to open your pool. However, if you have a large pool and you're already paying a lot for electricity, then opening the pool could end up being cheaper than running your air conditioner during the summer.

It depends on the size of your pool and how often you use it. Generally speaking, a pool pump can add an extra $50 to $100 to your monthly electric bill.