The monthly electricity costs for running a hot tub vary for many different reasons. The first consideration is the particular hot tub model that you buy. The most energy efficient hot tubs today have great insulative qualities as well as energy efficient hot tub heaters and pumps. Hot tub insulation can be measured by R-value like other types of insulation. Our Hot Spring models have one of the highest R-value insulation ratings available. The next consideration is the cost of electricity in your area which is measured in kilowatt hours (kWh). Every power district sets their own rates and the price of electricity where you live is key to understanding how much your electricity bill will go up if you run a hot tub. The climate and average daily temperature where you live is also a major consideration as most people install their hot tubs outdoors. The colder the climate the more electricity will be needed to keep the water warm. Another consideration is how often you will use your hot tub. When you are using your hot tub additional pumps come on to power the massage jets. In addition the cover is off of the hot tub allowing heat to escape into the air. The more often your hot tub is in use the higher the electricity costs will be. Lastly, keep your hot tub covered with a high efficiency hot tub cover to help seal heat in. And be sure your hot tub cover is in good condition and forms a tight seal with the top of your hot tub. Many Hot Spring owners report that their monthly electricity costs for running a hot tub are under $20. per month.