The monthly electricity cost of a home sauna typically runs between $15 and $25 for a two-person infrared unit or $40 to $70 for a larger traditional electric sauna, but that number matters less than the research-backed health outcomes you're getting for roughly the price of a streaming subscription.
I paid $23.47 last month to run my sauna. Four sessions a week, 40 minutes each. Two-person infrared unit. Standard residential electricity rate.
That number surprises most guys I talk to. They expect triple digits. They heard about a neighbor whose bill jumped $200 after installing a sauna in an unheated garage. Or they read a forum post claiming the unit “eats power like an AC running 24/7.” Neither matches what I found when I actually checked the numbers.
Let’s start with the real cost. Then I want to explain why that number matters less than you think.
What a Home Sauna Actually Costs to Run
I pulled energy consumption specs from three manufacturers, cross-checked them against a 2020 Department of Energy report on residential appliance use, and tracked my own meter for two months.
For a typical setup:
- Infrared sauna (two-person, 1,500 to 2,000 watts). 30 to 45 minutes per session. Four times a week. That’s about 6 to 9 kilowatt-hours per week. At the U.S. average of $0.15 per kWh, you’re looking at $0.90 to $1.35 per session. Monthly total: $15 to $25.
- Traditional electric sauna (four-person, 6,000 to 9,000 watts). Larger space, more energy to heat the rocks. 45 to 60 minutes per session. Four times a week. Roughly 18 to 28 kWh per week. Monthly total: $40 to $70.
- Cold climate adjustment. If you live somewhere it hits negative digits and your sauna is in an uninsulated shed, add 20 to 30 percent. The heater works harder to overcome cold walls.
Even the worst case I could find involved a heavy user in Minnesota with a large traditional unit in an uninsulated garage. He reported $110 in a January billing cycle. That’s still less than a basic gym membership.
So the monthly electricity cost for a home sauna is somewhere between the price of a pizza and a nice dinner out. That’s the number. Now the real question: what are you buying with that $40?
Compare It to What You Already Spend
I spent an afternoon looking up average monthly health spending for American men. The number that kept coming up was about $350. That includes gym memberships, supplements, protein powders, copays, prescription drugs, and over-the-counter stuff.
Nobody questions $80 for a tub of creatine. Nobody hesitates at $150 for a gym membership they use twice a week. But $40 for heat exposure feels like a luxury.
The irony is that the research on regular sauna use is stronger than the research on most supplements men buy. A 2015 study in JAMA Internal Medicine followed 2,300 Finnish men for 20 years. The men who used the sauna 4 to 7 times per week had a 40 percent lower risk of dying from cardiovascular disease compared to those who went once a week. The relationship was dose dependent. More sessions correlated with better outcomes.
Another study in Age and Ageing (2017) looked at the same cohort and found a 65 percent lower risk of dementia and Alzheimer’s in the frequent sauna users.
A 2018 paper in the American Journal of Medicine showed that regular sauna use reduced C-reactive protein, a marker of systemic inflammation.
None of these studies prove causation. I am not a doctor and I am not telling anyone that a sauna will prevent heart disease or dementia. But the association is strong enough that the National Institute for Health and Welfare in Finland treats sauna use as a public health variable, not a lifestyle choice.
Now compare that to the $30,000 cost of a single angioplasty. Or the $350,000 average cost of dementia care over the course of the disease. Spending $40 a month on electricity to heat your body four times a week starts to look like a bargain, even if the sauna only shifts the odds by a small percentage.
Why the Electricity Question Comes Up So Often
In Finland, nobody asks this. Sauna is in 90 percent of homes. It is considered a basic utility, like hot water or indoor plumbing. The electricity consumption is built into the household budget as a normal line item.
In America, sauna is treated as a luxury. That creates a mental barrier that has nothing to do with actual cost. We will spend $1,200 a year on health insurance deductibles before coverage kicks in. We will drop $600 on supplements we read about online. But ask a guy to spend $20 a month on heat exposure and his brain treats it as optional spending.
That is a cultural hangup, not a financial one. The electricity cost is real, but it is small. The perceived cost is inflated by the fact that we have not been taught to see heat stress as a legitimate health tool.
What to Do With This Information
If you already own a sauna, check your actual usage on your utility bill. Most people overestimate what they spend. If the number is higher than expected, look at insulation. Foam board in the walls and a properly sealed door can cut energy use by 20 percent. A programmable timer also helps. No point heating an empty box.
If you are thinking about buying a sauna, stop letting the electricity cost be the deciding factor. Look at the total picture: the upfront purchase, the space, the installation, and the $20 to $60 per month to run it. Then compare that to what you are already spending on health. If the sauna reduces your need for massages, physical therapy, or even just expensive coffee shop visits, the math gets better.
And if you cannot install one, find a gym with a sauna included in the membership. You get the same heat exposure without paying the electricity bill directly.
The Bigger Picture
The Finnish men in that 20 year study were not optimizing their kilowatt hours. They were just using the sauna because that is what their fathers did. The researchers followed them for two decades and found that the ones who used it most had the best health outcomes.
Your electric bill is not a barrier. It is a signal. And the signal is that for less than the price of a monthly streaming subscription, you can subject your cardiovascular system to a heat stress that the research associates with better heart health, lower inflammation, and sharper cognition.
That is a trade worth making.
Note on the research: The studies referenced are from peer reviewed journals. Always talk to a doctor before starting any new health routine, especially if you have heart conditions or take blood pressure medication.
Frequently asked questions
how much does it cost to run a home sauna per month
A two-person infrared sauna used four times a week typically costs between $15 and $25 per month at the U.S. average electricity rate. A larger traditional electric sauna running on a similar schedule runs closer to $40 to $70 per month. If your sauna is in an uninsulated space in a cold climate, expect to add around 20 to 30 percent on top of that.
does a home sauna raise your electricity bill a lot
For most people the increase is smaller than expected. A two-person infrared unit running four sessions a week uses roughly 6 to 9 kilowatt-hours per week, which works out to less than $1.35 per session at average U.S. rates. Even a heavy user with a large traditional sauna in an uninsulated garage reported $110 in a single January billing cycle, which the article notes is still less than a basic gym membership.
is regular sauna use actually good for your health
The research is stronger than many people realize. A 2015 study in JAMA Internal Medicine followed 2,300 Finnish men for 20 years and found that those who used the sauna four to seven times per week had a 40 percent lower risk of dying from cardiovascular disease compared to those who went once a week. A 2017 study in Age and Ageing using the same cohort found a 65 percent lower risk of dementia and Alzheimer's in frequent sauna users, and a 2018 paper in the American Journal of Medicine linked regular sauna use to reduced C-reactive protein, a marker of systemic inflammation.
how can I lower the running cost of my home sauna
Improving insulation is one of the most effective steps: foam board in the walls and a properly sealed door can cut energy use by around 20 percent according to the article. Using a programmable timer also helps by making sure you're not heating an empty unit. Checking your actual utility bill rather than estimating is a good starting point, since most people overestimate what they're spending.