When we bought our house it came with a hot tub. We've been told by numerous people who own hot tubs it costs on average about $30/month to run. At first we wern't to keen on the idea of paying the extra power to run it, but decided to try it out. Turns out we really like it, but it seems to cost more to run than we expected. We've replaced the cover, turn it down when not in use, and put it on "econo" mode. The hot tub is only 3 years old. Just got our power bill and its showing for months of Dec/Jan we used 68 kw per day!! Only 3 baseboard heaters in our basement that are rarely ever on, heat with oil forced air. It's kind of hard to judge exactly whats going to the hot tub for power since it was here when we bought the house.