HSA 101: What is an HSA?
- Saving Wiser
- Apr 24
- 4 min read
If you've heard the term HSA thrown around during open enrollment and nodded along without really knowing what it means — this is for you. Or maybe you already have one but haven't figured out what to actually do with it — this is for you, too.
An HSA, or Health Savings Account, is a special type of savings account that lets you set aside money for healthcare expenses. What makes it different from a regular savings account isn't just what you can spend it on — it's how it's taxed. Or more accurately, how it's not taxed.
It's one of the few accounts where your money goes in tax-free, grows tax-free, and comes out tax-free — as long as you use it for qualified medical expenses. No other investment account does all three.
Most people who have one use it like a healthcare debit card — swipe for copays, done. That works. But once you understand how it actually works, it starts to look much more like a long-term financial tool than a spending account.
Here's the full picture.
The Triple Tax Advantage
No other account does what an HSA does. It gives you three tax benefits at once:
Money goes in tax-free: If you contribute through payroll, those contributions are typically taken out before federal income tax, FICA taxes, and, in most states, state income tax. If you contribute on your own, the contribution is generally tax-deductible on your federal return.
Money grows tax-free: Interest, investment gains — none of it gets taxed while it sits in your account.
Money comes out tax-free: Spend it on qualified medical expenses, and you owe nothing.
A 401(k) gives you one of these. A Roth IRA gives you two. An HSA gives you all three.
Source: IRS Publication 969 — irs.gov/publications/p969
What Can You Actually Use It For
This is where most people are surprised. The IRS says HSA funds can be used for anything that diagnoses, treats, prevents, or manages a physical or mental condition — and that covers a lot more than doctor visits.
Things that are straightforwardly eligible — no extra paperwork needed:
Doctor and specialist visits
Prescriptions
Dental care
Vision care and glasses
Over-the-counter medications
Sunscreen (SPF 15+)
Feminine products
Blood pressure monitors
Hearing aids
Prenatal vitamins
And then there's a whole category most people don't know about — items that can qualify with a Letter of Medical Necessity (LMN) from a licensed provider:
Supplements
Wearables and health monitors
Exercise equipment
Sleep-related items
A Letter of Medical Necessity (LMN) is exactly what it sounds like — a licensed healthcare provider documenting that something is medically necessary for your specific condition. Once you have one, that item may qualify as an HSA-eligible if it follows the IRS guidelines. Read more about LMNs here.
For the full official IRS list, visit IRS Publication 502 — or use our HSA Eligible Expense Search Tool to search faster.
Note: IRS Publication 502 defines all qualifying medical expenses under Section 213(d); it’s not an HSA‑specific document, but it’s the source used to determine eligible expenses.
Source: IRS Publication 502 Section 213(d) — irs.gov/publications/p502
Before You Can Use an HSA, You Need This
Two things to know before you can open and contribute to an HSA:
1. You need a qualifying health plan. HSAs are only available to people enrolled in a High Deductible Health Plan (HDHP). Not every health plan qualifies — it's worth confirming with your employer or insurance provider before assuming you're eligible. For more information on High Deductible Health Plans, click here.
2. There are annual contribution limits. For 2026:
$4,400 for self-only coverage
$8,750 for family coverage
+$1,000 catch-up contribution if you're 55 or older
For a complete breakdown of the 2026 contribution limits, click here.
Source: IRS Revenue Procedure 2025-19 — irs.gov/pub/irs-drop/rp-25-19.pdf
How It’s Different From Insurance
Your HSA is not insurance — it works alongside your health plan.
Your insurance helps cover the cost of care. Your HSA gives you a tax-advantaged way to pay for that care — or save for it.
Your Balance Never Expires
This is the one that surprises people most.
Unlike an FSA — which has a use-it-or-lose-it deadline — your HSA balance rolls over every year with no limit. Money you put in today can stay invested and growing for decades. Your account is also fully portable, meaning it stays with you even if you change jobs or switch health plans.
Here’s something to keep in mind: withdrawals for non‑medical expenses before age 65 are taxed as income and hit with a 20% extra tax. After age 65, you still pay income tax on non‑medical withdrawals, but the 20% penalty goes away. Any qualified medical expenses you pay with your HSA remain tax‑free, no matter your age.
Most people treat their HSA like a spending account. The smarter move is to treat it like an investment account that you can also use for healthcare—tax-free.
Source: IRS Publication 969 — irs.gov/publications/p969
The Short Summary
Here's what you need to know about an HSA:
Requires an HDHP to contribute. Learn more here.
2026 contribution limits: $4,400 (self-only) / $8,750 (family). Learn more here.
Triple tax advantage — contributions, growth, and withdrawals
Balance rolls over every year, no expiration
Fully portable — yours regardless of employer
Can be invested for long-term growth
Next Steps
Thanks for reading, The Saving Wiser Team
Disclaimer: Saving Wiser is not a doctor, tax professional, or financial advisor. This content is for informational purposes only. HSA eligibility and rules vary by plan—always verify with your HSA administrator and consult your doctor and a qualified tax or financial professional for your specific situation. Some links on this site may be affiliate links, which means we may earn a commission at no additional cost to you.
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