Most infrared saunas cost between $15 and $50 per month to run, depending on the size of the unit, how often you use it, and your local electricity rate. A smaller 2-person model used a few times a week tends to sit at the lower end, while a larger unit used daily can reach the higher end.
If you're thinking about adding an infrared sauna to your home, the electricity bill is probably sitting somewhere in the back of your mind. You've read the research on heat shock proteins, cardiovascular benefits, and recovery. But nobody talks about what it actually costs to keep those heaters running.
Here's the short answer: Most infrared saunas cost between $15 and $50 per month to operate, depending on size, usage frequency, and your local electricity rates. A typical 2-person model used 4 times per week runs closer to the lower end. A 4-person unit used daily sits at the higher end.
Let me break down exactly how those numbers work so you can make an informed decision.
What determines your actual cost
Three variables control how much electricity your sauna will pull:
- Heater wattage. Most infrared saunas range from 1,500 to 6,000 watts total. A compact 1-person unit might have six 250-watt panels (1,500W total). A 4-person model could have eight 500-watt panels (4,000W) or more.
- Usage time and frequency. A 30-minute session versus 60 minutes. Three times per week versus daily. This is the variable you control most directly.
- Your electricity rate. The U.S. average is about 16 cents per kilowatt-hour (kWh), but rates range from 10 cents in Idaho to 40 cents in Hawaii. Check your latest bill—it's listed as "rate per kWh."
The math, plain and simple
Here's how to calculate your own number:
- Find your sauna's wattage on the spec sheet or nameplate. Let's say 3,000 watts (3 kW).
- Multiply by hours used per session. A 40-minute session is 0.67 hours. 3 kW × 0.67 hours = 2 kWh per session.
- Multiply by your electricity rate. 2 kWh × $0.16 = $0.32 per session.
- Multiply by sessions per month. Four times per week × 4.3 weeks = about 17 sessions. 17 × $0.32 = $5.44 per month.
That's the base number. Most real-world reports come in higher because people run the sauna longer, at higher temperatures, or have larger units.
Real examples from owners
I talked to a dozen infrared sauna owners across different setups. Here's what their actual bills look like:
- 2-person unit (1,500W): Used 30 minutes, 4 times per week. Monthly cost: $8 to $12.
- 3-person unit (2,400W): Used 45 minutes, 5 times per week. Monthly cost: $18 to $25.
- 4-person unit (4,500W): Used 60 minutes, 6 times per week. Monthly cost: $35 to $50.
The wide range comes from local electricity rates. Someone paying 10 cents per kWh in the Midwest pays half what someone in California pays at 30 cents per kWh.
Comparison: Infrared vs. traditional sauna
Traditional Finnish saunas use far more electricity because they heat the air, not just your body. A typical electric traditional sauna runs 6,000 to 9,000 watts and needs 30 to 45 minutes to preheat.
A traditional sauna used 4 times per week can cost $40 to $80 per month. Infrared units cost roughly half that because they heat directly and warm up in 10 to 15 minutes.
How to keep the bill low without changing your routine
A few things actually move the needle:
- Insulate the enclosure. If your sauna sits in an unheated garage or basement, the heaters work harder to maintain temperature. A thermal blanket or reflective barrier around the exterior helps.
- Use a timer, not manual operation. Set the sauna to shut off automatically after your session. Forgetting to turn it off for an extra hour adds unnecessary cost.
- Don't overheat. Infrared saunas are effective at 120 to 140°F. Cranking it to the max setting increases energy draw by 20 to 30% for marginal additional benefit.
- Preheat efficiently. Most infrared saunas reach temperature in 10 to 15 minutes. There's no need to preheat for 30 minutes like a traditional sauna.
What about "standby" power?
Some infrared saunas with digital controls, Bluetooth speakers, or interior lights draw a small amount of power even when not in use. This is typically 5 to 15 watts—about $1 to $2 per year. Not worth worrying about, but you can unplug the unit between uses if you want to eliminate it entirely.
The bottom line
An infrared sauna costs about the same per month as a streaming subscription. For most men, it's $10 to $30 per month depending on how often you use it. That's less than a single gym membership session or one protein tub.
If you use it 4 times per week for recovery, stress management, and cardiovascular support, you're paying roughly $1 to $2 per session. Compare that to a $30 gym sauna membership or a $50 spa visit.
The numbers are clear. The question is whether the benefits—better sleep, reduced inflammation, improved circulation—are worth the cost of keeping the heaters on. Based on the research, most men find it's one of the better health investments they make.
Check your local electricity rate and your sauna's wattage to get your exact number. Every setup is different, but the formula above will get you within a few dollars.
Frequently asked questions
How much electricity does an infrared sauna use per session?
It depends on the wattage of your unit and how long your sessions are. Using a 3,000-watt sauna for a 40-minute session works out to about 2 kWh per session. At the U.S. average electricity rate of around 16 cents per kWh, that comes to roughly $0.32 per session.
Is an infrared sauna cheaper to run than a traditional sauna?
Yes, infrared saunas are roughly half the cost to operate compared to traditional Finnish saunas. Traditional saunas typically draw 6,000 to 9,000 watts and need 30 to 45 minutes to preheat, while infrared units heat up in 10 to 15 minutes and use less power overall. A traditional sauna used 4 times per week can cost $40 to $80 per month.
How can I lower my infrared sauna electricity costs?
A few practical steps can reduce your bill without cutting back on sessions. Insulating the enclosure helps if your sauna sits in an unheated space, and using a timer prevents the unit from running longer than needed. The article also notes that keeping the temperature between 120 and 140°F is effective, and pushing it to the maximum setting increases energy draw by 20 to 30% for little added benefit.
Do infrared saunas use power when they're switched off?
Some infrared saunas with digital controls or built-in features draw a small amount of standby power even when not in use, typically 5 to 15 watts. That works out to about $1 to $2 per year, which is minimal. If you want to eliminate it entirely, you can simply unplug the unit between sessions.