How Much Will My Electric Bill Be Affected By A New Hot Tub? If you are thinking about buying a hot tub, you may be Asking: How much electricity does a hot tub consume? How much will a hot tub affect my electricity bill? These worries are very understandable; after all, hot tubs used to require a substantial amount of power to maintain the constant high temperature. However, if you’re purchasing a newer hot tub, there is some good news. In recent years, hot tub manufacturers have aggressively improved energy efficiency. So the change in your monthly bill is likely to be much less than you may dread. Here, we have addressed some of the most frequently-asked questions about how much you can expect your electric bill to increase when you add a new or used hot tub to your home. How Much Electricity Does a Hot Tub Consume? For