How Much Energy Does A Hot Tub Use?

By Adam

Owning a hot tub is a fun idea that a lot of people desire. Most people wish they had one of their own at home to stop their frequent visits to the spa. But before you go out and purchase one yourself, you should ask yourself if you truly know how much it costs to purchase one and maintain it.


It is essential to understand all the requirements needed before you impulse buy something costly like a hot tub, and to ensure you are comfortable with your decision.

How Much Does A Hot Tub Cost Per Month?

There are a lot of advertisements from manufacturers who claim that a running tub costs about $1 per day, and on the higher scale, it may cost up to $40-$50 per month to run.

The heater and the pump used in a hot tub are the primary energy consumers, which use an average of 1,500 to 6,000 watts of energy.

The heater consumption depends on the voltage of the heater, which can range between 120-140 volts.

This rough estimate does not include your location of residence, which is a factor to consider when you are buying a tub. 

You want to minimize the amount of electricity you will be using on running the tub.

If you are living in a cooler area, you will use more electricity than the person living in a warm place because the tub will be running a little bit harder to keep the tub warm for you.

With this in mind, it's best to budget a little bit higher for your tub before purchasing to be on the safe side.

 In addition to this, the cost of energy consumption also varies depending on your cost of energy per kilowatt-hour, the amount of time you spend on your tub, and your maintenance habits.

How To Calculate The Cost Per Month for Operating A Hot Tub?

You can easily calculate the amount of energy based on the rough estimates above. Let’s say your hot tub heater is 120 volts; this means that when your tub is running, it will use 3,000 watts; this is inclusive of the running pump.

 If you have a bigger heater, it will consume more watts. To calculate the cost of your energy consumption, you can multiply the kilowatt per hour rate by the kilowatt per hour that is on your energy bill.

 For instance, if the rate is 7 cents per kilowatt per hour and you have a 120-volt heater running at 3,000 watts, which means 3KWh, then your rate per hour will be 21 cents. This is the low estimate.

What Factors Can You Consider If You Want To Save Costs on Operating A Hot Tub?

List of Factors

Factor 1

Insulate The Tub

Buying a good, energy-efficient, high quality, and insulated tub enables you to save on energy consumption. Before buying a tub, make sure you check whether it's insulated or not.

An insulated tub means that you will have an insulated cover. This cover will prevent a large amount of heat from escaping the water of your tub.

Your tub should also be insulated in the cabinets that are on the sides and underside. Ensure the area between the cabinet and the shell is insulated by foam to maintain the heat in the tub; this way, you won't have to reheat the water.

factor 2

Cheaper Rates

Check with your local providers to see who is offering the cheapest rates on electricity and then change your provider if you need to. This will help you save some money on your bill.

(You may not be able to utilize this factor in your area.)

Factor 3

Close Air Jets

Some manufacturers produce tubs with air jets; if your tub has air jets, make sure you close them once you are out of the tub or not using the tub.

It’s best if you close the air jets because they introduce air and the air cools the water. Once the water is cool, you will be forced to reheat the water and this will require more energy.

factor 4

Change Your Thermostat Settings

Temperature Control Gauge

You can adjust the temperature of your tub according to the number of days you use your tub to save on energy consumption. When you are not using the tub, you may turn it down and turn it up when you want to use the tub.

factor 5

Check The Quality of Your Heater

This comes in handy during maintenance; make sure you check how your heater is doing regularly.


If the heater has aged, it is less energy efficient; get a new quality heater to save on the cost and avoid excessive energy consumption.


Filter the Jets

Clean your filter jets regularly. You don't want to be in a dirty tub anyway, so it is an easy process to do. Dirty tubs make the heater and pump work harder and the harder they work, the higher your energy bill costs.


It is essential to understand that other factors increase the cost of owning a tub at home and not only the energy bill.

Tubs should be maintained on a regular basis. They require chemical extracts to keep bacteria away. This may cost up to $100.

You will be required to replace the tub water every 3 to 4 months, depending on the system your tub is using. It will also be necessary to change the filters according to manufacturer's warranty. 

Other costs are involved during purchase and installation that you will be required to consider, and these may lead up to thousands of dollars.

You will need a well conversant hot tub dealer to help you with this process, just like buying a car.

It's advisable to have a hot tub dealer help you with calculations, depending on the tub you want to be installed.

Don't opt for a cheaper tub option that is not energy-efficient, as this might cost you more money in the end.