Not only do you need to worry about the cost of building and installing a hot tub, it is important to consider some of the costs that you will incur while you own the hot tub as well. This can include keeping the hot tub clean and adding in more water as it is needed. Another thing to consider is the amount of electricity that the hot tub can use. If you utilize the hot tub often, you may find that it will use a lot of electricity and this can get expensive if you are not careful. In fact, your hot tub is probably going to use up more wattage compared to any of the other appliances in your home. To start, you will have the heater voltage. This will depend on the type that you use on your hot tub. A good example is to look at the Otter Tail Power Company. Their 120-volt water heater will use up to 1500 watts while the 240-volt heater is going to use 6000 watts. The amount that you use the hot tub will help determine how much this is going to cost. Your circulation pump is going to use a similar amount of energy as the 120-volt water heater that we talked about above so you can often go with 15000 watts as your estimate. You can then take both of these items and figure out the electricity cost in your area. This will depend on the place you live and what the current electricity rates are. It often averages to be an additional $25 a month for your electricity if you have an energy efficient hot tub. The more you use it and the hotter it needs to keep the water, the more your hot tub will cost you each month.