What Can I Use My HSA For? Eligible Expenses & Rules

A Health Savings Account (HSA) is frequently called the ultimate tax-advantaged vehicle in the United States. Unlike almost every other account type, it offers a triple tax advantage: contributions are 100% tax-deductible, funds grow completely tax-free through investments, and withdrawals are entirely tax-free when used for qualified medical expenses.

However, many account holders treat their HSA like a basic coupon book, using it only for the occasional doctor's co-pay or prescription. In reality, the IRS guidelines on what can i use health savings account for are remarkably broad, covering thousands of everyday items, specialized treatments, and even long-term family planning tools.

To help you maximize every dollar in your account, this guide breaks down exactly how you can use your HSA, highlights surprising eligible expenses, reveals the "gray areas" that require special documentation, and explains how to use your HSA as a stealth retirement account.

The Core Rule: IRS Publication 502

The fundamental authority on HSA eligibility is IRS Publication 502 (Medical and Dental Expenses). The IRS defines qualified medical expenses as costs associated with the diagnosis, cure, mitigation, treatment, or prevention of disease, or for the purpose of affecting any structure or function of the body.

Crucially, these expenses must be primarily to alleviate or prevent a physical or mental defect or illness. They do not include expenses that are merely beneficial to general health, such as vitamins, gym memberships, or vacations, unless prescribed by a medical professional to treat a specific, diagnosed condition.

Let’s dive into the major categories of what you can purchase with your HSA funds.

Surprising Everyday Items You Can Buy with Your HSA

Thanks to the CARES Act of 2020 and subsequent federal updates, the definition of over-the-counter (OTC) medical products has expanded dramatically. You no longer need a prescription from a doctor to buy common OTC medications with your HSA card.

Here are some of the most surprising, everyday wellness products that are 100% HSA-eligible:

Sunscreen and Sun Care: Any sunscreen with SPF 15 or higher is fully eligible. So are after-sun aloe vera gels and prescription sunglasses.
Acne Treatments: Over-the-counter acne creams, cleansers, and light-therapy masks are eligible.
Menstrual Care Products: Tampons, pads, liners, period underwear, and menstrual cups were permanently added to the eligible list under the CARES Act.
High-Tech Health Monitors: Smart thermometers, blood pressure cuffs, pulse oximeters, and even specialized wearable monitors (like continuous glucose monitors, if medically indicated) qualify.
Travel and First Aid: First aid kits, bandages, wraps, joint braces, hot/cold packs, and motion sickness remedies.
Sleep Aids and Allergy Relief: Nasal strips, CPAP machines and accessories, antihistamines, decongestants, and throat lozenges.

Vision, Dental, and Mental Health Care

Many people do not realize that HSA funds can cover specialized care that might not be fully covered by their primary health insurance plan.

Comprehensive Dental Care

While cosmetic dental treatments like teeth whitening are strictly excluded, almost all structural and preventative dental care is covered. This includes:

Routine cleanings and X-rays
Fillings, crowns, root canals, and extractions
Orthodontia (braces and clear aligners like Invisalign) for both adults and children
Nightguards to prevent teeth grinding
Dentures and dental implants

Vision Care

If you wear glasses or contacts, your HSA can save you thousands of dollars. Eligible expenses include:

Eye exams and contact lens fittings
Prescription eyeglasses, reading glasses, and prescription sunglasses
Contact lenses, cleaning solutions, and storage cases
Laser eye surgery (LASIK, PRK, and radial keratotomy)

Mental Health and Therapy

Mental health is treated with the same weight as physical health under HSA rules. You can use your tax-free dollars to pay for:

Psychiatric care and psychological therapy sessions
Inpatient treatment programs for addiction or mental health disorders
Transportation costs to and from therapy appointments

Family Planning and Reproductive Health

Growing or managing a family is incredibly expensive. Your HSA can offset these major life costs significantly. Qualified expenses in this category include:

Fertility Treatments: In vitro fertilization (IVF), including temporary storage of eggs or sperm, ovulation monitors, and fertility tracking devices.
Pregnancy and Childbirth: Prenatal vitamins, pregnancy tests, labor coaching/doula services (with some documentation), and obstetrician fees.
Breastfeeding Support: Breast pumps, storage bags, nursing bras, and lactation consultant consultations.
Contraception: Birth control pills, emergency contraception (Plan B), condoms, IUDs, and vasectomies.

The "Letter of Medical Necessity" (LMN) Hack

There is a massive category of wellness expenses that sit in a "gray area." By default, the IRS does not allow you to use your HSA for things like gym memberships, massage therapy, or supplements. However, if these items are directly prescribed by a licensed physician to treat a specific medical condition (such as obesity, chronic back pain, or clinical depression), they can become fully eligible.

To unlock these expenses, you need a Letter of Medical Necessity (LMN) from your doctor.

What an LMN Must Include:

A specific diagnosis: The exact medical condition being treated (e.g., severe osteoarthritis).
A specific recommendation: The exact treatment or product required (e.g., 12 months of therapeutic massage or a specific dietary supplement).
A defined duration: How long the treatment is medically necessary.
A clinical rationale: How the recommended treatment will alleviate the diagnosed condition.

Keep this letter in your tax records. If the IRS ever audits your HSA transactions, a valid, contemporaneous LMN is your shield against penalties.

Quick Reference Guide: Eligible vs. Ineligible Expenses

Fully Eligible (No LMN Required)	Eligible WITH a Letter of Medical Necessity (LMN)	Strictly Ineligible (Never Allowed)
Acupuncture & Chiropractor visits	Gym memberships & personal training	Teeth whitening
Prescription medications	Weight loss programs (for obesity)	Cosmetic surgery & Botox
Sunscreen (SPF 15+) & Lip balm with SPF	Massage therapy (for chronic pain)	Hair transplant surgery
Band-Aids & First aid kits	Air purifiers or humidifiers (for severe asthma)	Non-prescription vitamins & supplements
Menstrual cups, tampons, & pads	Specialized mattresses (for spinal injuries)	Health club dues or country club memberships
Contact lenses & LASIK surgery	Dietary supplements (to treat deficiencies)	Maternity clothes

Avoid the "26-Year-Old Adult Child" Tax Trap

Under the Affordable Care Act (ACA), you are allowed to keep your children on your health insurance plan until they turn 26. However, HSA rules do not match ACA rules.

According to the IRS, you can only use your HSA tax-free to pay for medical expenses incurred by:

Yourself
Your legal spouse
Any dependents you claim on your tax return

If your 24-year-old child is on your high-deductible health plan (HDHP) but you do not claim them as a dependent on your federal tax return, you cannot use your HSA to pay for their medical expenses.

Pro-tip: If your adult child is on your family HDHP and is not a tax dependent, they can actually open their own individual HSA and contribute up to the full family limit. This is an incredibly powerful, often-overlooked financial planning strategy for young adults.

The "Shoebox Strategy": How to Invest and Compound Your HSA

Most people treat their HSA like a checking account: they deposit money, go to the doctor, and immediately swipe their HSA debit card to reimburse themselves. While this saves you money on taxes, it misses the true wealth-building power of the account.

Because there is no time limit on when you must reimburse yourself for an eligible medical expense, you can use the "Shoebox Strategy."

How the Shoebox Strategy Works:

Pay Out of Pocket: When you incur a medical expense today, pay for it using your standard credit card or checking account. Keep the cash in your HSA.
Invest the HSA Funds: Instead of keeping your HSA in a low-interest cash account, invest those funds in low-cost index funds or ETFs. Allow that money to compound tax-free for 10, 20, or 30 years.
Save Your Receipts: Scan and save every medical receipt, explanation of benefits (EOB), and invoice into a secure digital "shoebox" (e.g., Google Drive, Dropbox, or your HSA custodian's portal).
Reimburse Yourself Decades Later: When you are ready to retire, pull out those decades-old receipts and request a tax-free reimbursement from your HSA provider. You effectively turn your HSA into a tax-free retirement fund that has enjoyed decades of compounding growth.

What Happens to Your HSA at Age 65?

If you manage to accumulate a large balance in your HSA by the time you reach age 65, the account becomes even more flexible.

Once you turn 65, the 20% tax penalty for non-medical withdrawals disappears. You can withdraw money from your HSA for any reason whatsoever—whether that’s buying a boat, traveling, or paying general living expenses. You will only pay standard income tax on the withdrawal, identical to how a traditional IRA or 401(k) works.

If you still have medical expenses after 65 (including Medicare premiums for Parts B and D, though not Medigap), you can continue to withdraw those funds completely tax-free. It is a win-win scenario that makes the HSA an elite asset class for retirement planning.

Best Practices for HSA Recordkeeping

If you decide to utilize your HSA actively, administrative discipline is critical. The IRS does not require you to submit receipts when you file your annual taxes (using Form 8889). However, you must be prepared to prove your expenses in the event of an audit.

Digitize Everything: Paper thermal receipts fade over time. Scan receipts immediately and back them up in multiple digital locations.
Match Invoices to EOBs: Always save the Explanation of Benefits (EOB) from your insurance provider alongside the payment receipt to prove the service was medically necessary and not cosmetic.
Use a Tracking Spreadsheet: Maintain a simple ledger tracking the date of service, patient name, provider, amount paid, and whether you have already reimbursed yourself or are saving the receipt for the Shoebox Strategy.