The best features of health savings accounts (HSAs) are often overlooked. That may be because HSAs haven’t been around that long. In generational terms, they’re basically Gen Z, created in 2003 and still slightly misunderstood.
HSAs aren’t just a place to stash pre-tax dollars for today’s medical bills—they’re long-term, portable, investable accounts that belong entirely to you. Once you understand how an HSA works, you can make the most of the triple-tax advantage1 for your current or future health care needs—even in retirement.
- Pre-tax (or tax deductible) contributions
- Tax-free growth potential
- Tax-free withdrawals for qualified medical expenses—now and in retirement
Here are 11 must-know facts to help you put that triple-tax advantage to work.
1. Your HSA is yours—not your employer’s
Unlike a flexible spending account (FSA), your HSA is fully portable. The money stays with you if you change jobs, change health plans, or stop being HSA eligible. Funds roll over automatically every year, there is no use-it-or-lose-it rule, and the account remains yours indefinitely.
This is one of the most misunderstood parts of HSAs—and the reason you’re not locked into the provider your employer picked.
2. You can shop for an HSA at any time
HSAs vary widely in fees, interest rates, investing options, and minimums. Many employer-selected HSAs charge maintenance fees, offer lower interest rates for smaller balances, and may limit or charge extra for investment access—issues Morningstar recently flagged as common signs of a subpar HSA.2
The good news: You don’t have to use your employer’s plan. You can open an HSA anywhere, even at Fidelity, and move your existing balance to the provider that best fits your needs.
3. You can invest for growth potential
Some HSAs impose high investment fees or offer a weak investment lineup, according to Morningstar’s analysis.
The real power of an HSA lies in the triple-tax benefit it offers. Pre-tax contributions can be invested for the future; any earnings can potentially grow tax-deferred or tax-free when withdrawn for qualified medical expenses.1 But relatively few HSA account owners invest their HSA balances: Just 22% of HSAs were invested in assets beyond cash in 2025.3
4. Some HSA fees are higher than others
Many HSAs charge setup fees, monthly account maintenance fees, transaction fees, or extra charges for investing. Smaller balances often get hit hardest with lower interest rates and higher relative fee impact, according to Morningstar’s review of the marketplace.2
Fees can be relatively small but that doesn't make them insignificant. Over time fees can add up and ultimately reduce the amount you have available to spend. It can make sense to shop around for these accounts to make sure you're able to make the most of the money you save and invest. One place to start shopping could be with the Fidelity HSA, which has no account fees or minimums.4 To get more tips on lowering fees, read Fidelity Viewpoints: Beat hidden investment fees.
5. You can consolidate multiple HSAs—tax-free and easily
Job changes often leave people with several old HSAs. Fortunately, you can consolidate them using a trustee-to-trustee transfer, if offered by your provider, which is tax-free and unlimited under IRS rules. There are some limits on rollovers, another type of transfer, which are discussed in the next section. Consolidating can help you reduce account fees and streamline your finances. If your HSA provider imposes minimum required balances for investments, consolidating could help reach investment minimums faster. Fidelity lets you start investing with just $1, or you can get professional investment help with Fidelity Go® HSA and start investing with $10.
Read Fidelity Viewpoints: 3 ways to consolidate multiple HSAs
6. Transfers are unlimited—but rollovers are not
A trustee-to-trustee transfer (where your providers move the money directly from one account custodian to another) can be done as often as you want and is always tax-free.
But an HSA rollover, where you take money out of the account and redeposit it into a new account can only be done once every 12 months across all your HSAs and must be completed within 60 days to avoid taxes and penalties. For example, if you're closing the account, your provider might send you a check made out in your name, which means you’d need to deposit it into another HSA within that 60‑day window.
7. Your HSA can stay invested even if you don’t contribute
You can’t contribute to an HSA without HSA-eligible health plan coverage, but your existing HSA investments can keep potentially growing tax-free. Many people don’t realize the account continues working for them long after they leave their HSA-eligible health plan.
8. HSAs can be used in retirement
After age 65, you can use your HSA for any purpose, not just medical bills. Nonmedical withdrawals work just like those from a traditional IRA or 401(k): They’re taxed as ordinary income, but no penalty applies.
Before age 65, those same withdrawals for nonmedical purposes would face both income tax and a 20% penalty.
That flexibility means your HSA can double as a long-term savings vehicle, helping you pay for health care in retirement—or even covering other expenses once you reach age 65.
Read Fidelity Viewpoints: 5 ways HSAs can help with your retirement
9. You can contribute to an HSA using a direct transfer from an IRA (once in a lifetime)
You may already think of HSA contributions as something that comes straight from your paycheck. But there’s a lesser-known way to boost your HSA balance: a one-time, once-in-a-lifetime IRA to HSA rollover. This special transfer lets you move money from a traditional or Roth IRA into your HSA, up to your annual HSA contribution limit for the year.
For the full details and more uncommon ways to fund an HSA, read Fidelity Viewpoints: IRA-to-HSA rollovers
10. HSAs can help protect your financial future
Money saved in an HSA can help you avoid using debt or retirement savings to pay for a medical hardship. If you lose your job, you can use HSA dollars to pay for certain types of health coverage, including COBRA, insurance while you’re receiving unemployment benefits, and Medicare or other qualifying coverage once you’re 65 or older.
Read Fidelity Viewpoints: Navigating higher health care costs
11. Reimburse yourself anytime
After you have opened your HSA, you can reimburse yourself for expenses you pay out of pocket at any time. That means you could pay $200 out of pocket for a dental procedure today, keep your receipt, and reimburse yourself that same $200 from your HSA years later, giving your assets more time to potentially benefit from compound growth.
But there are 2 important caveats: You can't reimburse yourself for expenses you incurred before you opened your HSA, and you can't double dip with other health care-related accounts or tax benefits. In other words, if you reimbursed that $200 dental procedure from your limited purpose FSA or included it in your itemized deductions, you would not be able to reimburse it from your HSA later.
If you have a Fidelity HSA, you can download the Fidelity® Health app to easily access and manage your account.
What to look for in an HSA
Not all HSAs are created equally. Because your account is yours for life—not tied to your employer—it’s worth choosing a provider that can help you make the most of your money. Here’s what to evaluate when you’re shopping for or consolidating into an HSA.
1. Low (or no) account fees
When evaluating any HSA, look for providers that minimize or eliminate fees so more of your money goes toward health care and long-term growth.
The Fidelity HSA® charges no annual account fees and has no minimums.
2. A competitive interest rate on HSA cash
Many HSAs use tiered rates that reward only large balances, so make sure your provider offers competitive yields even if you keep a modest cash cushion for upcoming medical expenses.
Fidelity publishes transparent HSA cash rates—currently 3.37% 7-day annualized yield (as of March 4, 2026).
3. Flexible, low-cost investment options
A strong HSA should let you invest easily—with no minimum required to begin investing and access to a wide selection of funds. Fidelity allows you to invest any amount and offers $0 commissions for US stock and ETF trades.
4. Reasonable investment minimums
Some HSAs require $1,000–$2,000 in cash before you can invest. By contrast, Fidelity’s HSA has no minimums to invest, which gives customers the flexibility to start growing their balance immediately.
If you’re comparing providers, look at how quickly you can get invested, especially if you’re using your HSA for long-term savings.
5. Tools and customer support
Apps, dashboards, tax forms, investment guidance, and support for long-term planning can vary widely. Since your HSA is yours for life, choose a provider with tools you’re happy to stick with.
Fidelity’s HSA experience includes digital tools for contributing, investing, spending, and transferring HSAs, along with customer support when you need it.