Is a Sauna HSA Eligible? Here's How to Qualify

A home sauna may be eligible for purchase using Health Savings Account (HSA) or Flexible Spending Account (FSA) funds, but it's not automatically eligible. Because saunas aren't on the IRS's standard list of qualified medical expenses, eligibility typically requires a Letter of Medical Necessity (LMN) from a licensed clinician confirming the sauna is medically appropriate for a diagnosed condition.

So the short answer? Yes you can buy a sauna with HSA or FSA funds, if qualified.

HSA funds can only be used for expenses the IRS defines as "qualified medical expenses" which encompasses products or services that diagnose, treat, mitigate, or prevent a health condition. Saunas don't appear on the IRS's standard eligibility list, which means they don't qualify automatically.

However, a Letter of Medical Necessity (LMN) can change that.

An LMN is a document from a licensed clinician that explains why a specific product or service is medically necessary to treat, mitigate, or prevent a diagnosed condition. With a valid LMN on file, a sauna purchase may qualify as an HSA/FSA-eligible expense.

An LMN typically includes:

• Your diagnosed medical condition
• The recommended treatment or product (in this case, sauna therapy)
• A clinical explanation of why it is medically necessary for your situation

Important: You should retain your LMN alongside your purchase receipt. If the IRS questions an HSA expenditure, proper documentation is what protects you from taxes and a potential penalty on non-qualified withdrawals.

A sauna purchased purely for relaxation or luxury, without a documented medical basis, would fall outside eligible use. The LMN tied to a medical necessity is what establishes the medical necessity that makes the difference.

The type of sauna you purchase doesn't automatically determine whether it's HSA/FSA eligible. Traditional, infrared, steam, and portable saunas may all qualify when they are purchased for a qualified medical purpose and supported by the appropriate documentation.

In other words, an infrared sauna isn't automatically eligible just because it's an infrared sauna, and a traditional sauna isn't automatically ineligible because of its type. Eligibility generally depends on whether a licensed clinician determines that the sauna is medically necessary for a diagnosed condition and whether the purchase meets applicable HSA/FSA requirements.

Because HSA contributions are made with pre-tax dollars, spending them on a sauna effectively discounts the purchase by your marginal tax rate. For many people, that translates to approximately 25–35% in savings compared to paying out of pocket.

Home saunas vary widely in price. Entry-level models can start around $1,000–$3,000, while premium units can run $5,000–$10,000 or more. Even at the lower end, the tax savings are meaningful.

*Truemed is for qualified customers. HSA/FSA tax savings vary. Learn more at truemed.com/disclosures.

Ready to use your HSA or FSA funds on a sauna? Truemed partners with leading sauna brands so qualified customers can put their pre-tax dollars to work.

Here are five places to start:

• Backyard Discovery — A trusted name in outdoor living for over 50 years, Backyard Discovery offers a range of indoor and outdoor saunas built with premium materials and ready-to-assemble kits. Options include traditional cabin saunas, barrel saunas, and infrared models for 2–4 people.
• SaunaBox — Designed to bring infrared sauna therapy home in a compact, accessible format, SaunaBox offers portable and full-spectrum infrared options, including models with built-in red light therapy. A strong option for those looking to maximize heat therapy and recovery in a smaller footprint.
• Sun Home Saunas - Sun Home Saunas offers a therapeutic heat solution for chronic conditions, helping to relieve muscle tension, improve circulation, and promote relaxation. Regular use can alleviate symptoms of arthritis, fibromyalgia, and chronic fatigue, while also detoxifying the body, improving skin health, and boosting immunity.
• Sunlighten — Trusted by doctors and health experts, Sunlighten is one of the most clinically recognized infrared sauna brands available. Their patented SoloCarbon® heater technology and Smart Sauna lineup make them a top choice for those seeking a medically informed, premium experience.
• SaunaKits.com — SaunaKits.com offers a therapeutic experience that combines heat therapy with modern innovation. Regular use helps relax muscles, alleviate joint pain, reduce stress, improve circulation, and support heart health. The detoxifying sweat sessions also boost immunity, providing a natural defense against chronic conditions.

All five brands are HSA/FSA eligible for qualified customers through Truemed. Simply look for the Truemed logo at checkout to get started.

HSA/FSA tax savings vary. Available to qualified customers only. See truemed.com/disclosures for details.