A Health Savings Account (HSA) is a tax-advantaged savings account designed to help you pay for medical expenses. But calling it just a savings account undersells what makes HSAs uniquely powerful: the triple tax advantage that no other financial account offers.
If you have an HDHP through your employer or the marketplace, understanding HSAs could save you thousands of dollars over your lifetime. This guide covers everything you need to know: how HSAs work, eligibility rules, contribution limits, and strategies for maximizing your tax savings.
How Does an HSA Work?
An HSA works like a personal savings account, but with significant tax benefits. Here's the basic flow:
You can contribute to an HSA on your own (even if your employer doesn't offer one) as long as you have an HDHP. Most HSA providers give you a debit card for direct payments to doctors, pharmacies, and other medical providers.
The Triple Tax Advantage (Why HSAs Are So Powerful)
HSAs are often called the "best tax-advantaged account in America" because they offer benefits that no other account can match. Here's the triple tax advantage:
1. Contributions Are Tax-Deductible
When you contribute to an HSA, that money comes out of your taxable income. If you contribute through payroll deduction, the money is taken out before taxes (including FICA). If you contribute directly, you can deduct it on your tax return even if you don't itemize deductions.
2. Growth Is Tax-Free
Any interest you earn or investment gains you make inside your HSA are not taxed. This is the same benefit that Roth IRAs offer, but HSAs add additional advantages on top.
3. Withdrawals Are Tax-Free
When you use HSA funds for qualified medical expenses, you pay no taxes on the withdrawal. Unlike traditional retirement accounts where you pay income tax on withdrawals, HSA withdrawals for medical expenses are completely tax-free.
Let's say Sarah is in the 24% federal tax bracket and pays 7.65% in FICA taxes. She contributes $4,300 to her HSA for 2026.
Federal tax savings: $4,300 × 24% = $1,032
FICA tax savings: $4,300 × 7.65% = $329
State tax savings (assuming 5%): $4,300 × 5% = $215
That's over $1,500 saved in year one alone, before accounting for any tax-free growth or withdrawals. Over a career, this can add up to tens of thousands of dollars.
Who Qualifies for an HSA?
To be eligible to contribute to an HSA, you must meet all four of these requirements:
Having a general-purpose health FSA (but a limited-purpose FSA is allowed)
Being enrolled in Medicare (Part A or Part B)
Being covered by a non-HDHP health plan
Being claimed as a dependent
HSA Contribution Limits (2026)
The IRS sets annual limits on how much you can contribute to an HSA. These limits apply to the total of your contributions plus any employer contributions.
2026 HSA Contribution Limits
2026 HSA Contribution Limits
The limit includes both your contributions and any employer contributions
If you're 55 or older at the end of the year, you can contribute an extra $1,000 (catch-up contribution)
If you become eligible mid-year, your limit may be prorated based on months of eligibility
You have until the tax filing deadline (typically April 15) to make contributions for the prior year
For complete contribution rules, see IRS Publication 969.
What Is a High Deductible Health Plan (HDHP)?
To contribute to an HSA, you must be enrolled in a High Deductible Health Plan. An HDHP is a health insurance plan with:
A higher annual deductible than typical health plans
A cap on the maximum out-of-pocket expenses you can pay
The IRS defines specific minimums and maximums that a plan must meet to qualify as an HDHP:
2026 HDHP Requirements
Look at your plan's Summary of Benefits and Coverage (SBC)
Check if your deductible meets the minimum requirement above
Many plans explicitly state "HSA-eligible" or "HDHP" in the plan name
Contact your HR department or insurance company if unsure
What Can You Spend HSA Money On?
HSAs can pay for a broad range of qualified medical expenses as defined by the IRS. Here are the major categories:
Always Qualified (No Documentation Needed)
Doctor and specialist visits
Hospital stays and procedures
Prescription medications
Lab tests and imaging
Mental health services (therapy, psychiatry)
Dental care (cleanings, fillings, crowns, orthodontics)
Vision care (exams, glasses, contacts, LASIK)
Physical therapy and chiropractic care
Medical equipment (crutches, hearing aids, wheelchairs)
Qualified With Letter of Medical Necessity (LMN)
Many wellness products become HSA eligible when a healthcare provider determines they help prevent, manage, or reverse a health condition. With a Letter of Medical Necessity, you may be able to use HSA funds for:
Fitness trackers and smartwatches
Gym memberships
Certain supplements
Massage therapy
Wellness programs
Curious what's HSA eligible? Check your eligibility with Crates →
NOT Qualified (Will Be Penalized)
Cosmetic procedures (teeth whitening, elective plastic surgery)
General fitness (unless medically necessary)
Health insurance premiums (with limited exceptions)
Non-prescription drugs for general wellness
Personal care items (toothpaste, shampoo)
Using HSA funds for non-qualified expenses results in income tax plus a 20% penalty. After age 65, the 20% penalty is waived (but you still pay income tax).
For a complete list of qualified expenses, see IRS Publication 502.
HSA vs FSA: Which Is Better?
Health Savings Accounts and Flexible Spending Accounts both offer tax advantages for medical expenses, but they work very differently.
Using Your HSA as an Investment Account
Here's what most people don't realize: HSAs aren't just savings accounts. They can be powerful investment vehicles.
Most HSA providers offer investment options once your balance exceeds a threshold (typically $1,000-2,000). You can invest in mutual funds, ETFs, index funds, and sometimes individual stocks.
Example: If you invest $4,300/year in your HSA starting at age 30 and earn 7% annually, you'd have approximately $750,000 by age 65. And unlike a 401(k), you can withdraw this money tax-free for medical expenses at any age.
How to Open an HSA
Opening an HSA is straightforward. Here's the process:
Your employer's chosen provider (often easiest for payroll deductions)
Banks (Fidelity, HSA Bank, HealthEquity)
Brokerages (Fidelity, Schwab, Lively)
Low or no monthly fees
Good investment options with low expense ratios
Low minimum balance for investing
Easy-to-use app and online portal
Quality customer service
Common HSA Mistakes to Avoid
Even with their benefits, many people don't get full value from their HSAs. Avoid these common mistakes:
