Sauna Running Cost Per Month: What You'll Actually Spend

Sauna Running Cost Per Month: What You'll Actually Spend

One of the first questions people ask before buying a home sauna is "what's it going to cost me every month?" The answer is probably less than you think - but it depends on what type of sauna you get, how often you use it, and where you live.

Here's the real-world breakdown with actual numbers.

Electric Sauna (Traditional Finnish)

Most home saunas are electric. They use a heating element (typically 4.5 to 9 kW) to heat rocks, which then radiate heat into the room. Here's how the electricity cost works:

A typical 6 kW sauna heater running for 1 hour (including heat-up time and session time) uses about 6 kWh of electricity. At the national average electricity rate of roughly $0.16/kWh, that's about $0.96 per session.

If you use the sauna 4 times per week, that's roughly $15-$17 per month in electricity. At 7 times per week (daily use), it's about $26-$30 per month.

Smaller heaters (4.5 kW for 2-person saunas) cost less. Larger heaters (8-9 kW for bigger saunas) cost more. But the range for most home saunas is $12-$40 per month depending on heater size and usage frequency.

Factors That Affect Electric Cost

• Insulation quality: A well-insulated sauna heats up faster and holds temperature with less energy. Poor insulation can increase costs by 20-30%.
• Pre-heat time: Most electric saunas take 30-45 minutes to reach full temperature. A well-insulated small sauna might get there in 20 minutes. That pre-heat time is the biggest chunk of energy use.
• Ambient temperature: Heating a sauna in a Minnesota winter costs more than in a Texas summer because you're starting from a lower baseline temperature.
• Local electricity rates: Rates vary from $0.10/kWh in some states to $0.30+/kWh in others. This can triple the cost in expensive electricity markets like Hawaii or Connecticut.

Infrared Sauna

Infrared saunas use significantly less electricity than traditional electric saunas. A typical infrared sauna draws 1.5-3 kW, about half the power of a traditional electric heater.

The cost per session for infrared is roughly $0.25-$0.50, which translates to $4-$15 per month depending on how often you use it. Infrared saunas also heat up faster (10-15 minutes vs. 30-45 minutes), which reduces total energy consumption per session.

If minimizing electricity cost is a priority, infrared is the clear winner. Browse our indoor sauna collection for infrared options.

Wood-Burning Sauna

Wood-burning saunas use zero electricity (unless you've added lighting or a fan). Instead, you're buying firewood. The cost depends heavily on where you live and whether you have access to cheap or free wood.

If you're buying firewood, expect to use about 10-20 lbs per session. At typical firewood prices ($200-$350 per cord, where a cord is roughly 3,000-4,000 lbs), each session costs about $1-$2 in wood.

Monthly cost at 4 sessions per week: $16-$32 in firewood. At daily use: $30-$60 per month. If you have access to free wood (your own land, a neighbor who drops trees), the cost drops to essentially zero.

Maintenance Costs

Beyond the energy cost, sauna maintenance is minimal. Here's what to budget:

Sauna Stones: $0-$5/month

Sauna rocks crack and degrade over time from repeated heating and water contact. They should be inspected annually and replaced every 2-5 years. A full replacement set costs $30-$80. Averaged out, it's a few dollars per month at most.

Wood Treatment: $0-$3/month

Interior wood in a sauna generally doesn't need treatment (and shouldn't be sealed or stained). Exterior wood on outdoor saunas benefits from annual treatment with a wood-safe stain or oil to protect against weather. Budget $50-$100 per year for exterior maintenance on outdoor models.

Heater Replacement: $0 (but plan ahead)

Electric sauna heaters last 10-20 years with normal use. Eventually they'll need replacing, which costs $300-$1,000 depending on the heater size. It's not a monthly cost, but worth knowing about. Set aside $5/month mentally for eventual heater replacement and you'll be covered when the time comes.

General Cleaning: Essentially Free

Saunas are naturally self-cleaning to a degree - the heat kills bacteria. Wipe down benches periodically, sweep the floor, and keep the sauna ventilated after use. No special cleaning products needed. Maybe a light sanding of the benches every few years if they get rough.

Total Monthly Cost by Type

Here's the summary for someone using their sauna 4-5 times per week:

• Electric (traditional): $15-$35/month (electricity + minimal maintenance)
• Infrared: $8-$20/month (lower electricity + minimal maintenance)
• Wood-burning: $20-$45/month (firewood + minimal maintenance) or near $0 with free wood

Compare That to Alternatives

For context, here's what other sauna access costs:

• Gym membership with sauna: $30-$80/month
• Dedicated sauna or bathhouse: $20-$40 per visit, or $100-$200/month for a membership
• Spa day pass: $40-$100 per visit

Even at the high end of home sauna running costs, you're spending a fraction of what facility access costs. And you get unlimited use on your own schedule with your own temperature preferences.

Looking for an efficient sauna to keep running costs low? Browse our outdoor saunas and barrel saunas (barrel saunas heat up faster due to their shape, which saves energy per session).