What Is a Health Savings Account (HSA) and How Does It Work?

A health savings account (HSA) is one of the most tax-advantaged ways to save for future medical expenses—and even retirement if you know how to use it strategically. HSAs are available to individuals and families with a qualifying high-deductible health plan and are designed to help cover out-of-pocket costs for doctor visits, hospital bills, prescriptions, lab tests and other common medical costs.

But here’s the part most people miss: HSAs come with a hidden tax superpower that can seriously boost your long-term savings. Let’s take a closer look at how they work—and how to make the most of your HSA.

What Is a Health Savings Account (HSA)?

A health savings account, or HSA, is a type of bank or investment account designed to help you save for medical expenses—and, potentially, much more. To open and contribute to an HSA, you must be enrolled in a high-deductible health plan that meets specific IRS criteria. If your plan qualifies, you can contribute up to the annual limit regardless of your income level.

Tax benefits

HSAs offer a rare and powerful triple tax advantage:

• Contributions are tax-deductible, lowering your taxable income for the year.
• Growth from interest or investments is tax-free, as long as it stays in the account.
• Withdrawals for qualified medical expenses are also tax-free, including any capital gains.

This means that, when used properly, an HSA can help you pay for healthcare with untaxed dollars—both now and in the future. It’s one of the most tax-efficient tools available, and if you’re eligible, it’s worth considering as part of your medical budgeting and long-term financial strategy.

HSA Rules

You can open an HSA through your employer if it’s part of your benefits package, or on your own through a financial institution that offers HSAs. If you’re choosing one independently, compare fees, interest rates and investment options—some accounts may offer better long-term growth potential than others.

To qualify for an HSA, you must be enrolled in a high-deductible health plan (HDHP) that meets specific IRS requirements. Annual contribution limits apply, regardless of whether you or your employer fund the account.

HDHP deductibles breakdown

Here are the minimum annual deductible and maximum annual deductible and other out-of-pocket expenses for HDHPs for 2025:

Source: Internal Revenue Service

HSA contribution limits

The maximum contribution for an HSA typically increases annually to account for inflation. Here’s a look at current and recent HSA contribution limits:

Source: Internal Revenue Service

If you’re 55 or older, you can contribute an additional $1,000 per year as a catch-up contribution—a helpful perk if you’re playing financial catch-up before retirement. If your employer offers an HSA, they may contribute on your behalf. These employer contributions are not counted as taxable income. However, even if your employer doesn’t contribute, you can still fund your account up to the annual IRS limit. When an employer contributes to your HSA directly, those contributions are not included in your taxable income.

Unlike funds in a flexible spending account (FSA), funds in an HSA never expire. You can withdraw tax-free for any eligible medical expense. If you withdraw for non-medical reasons before age 65, you’ll owe income taxes and penalties.

After age 65, you can withdraw without penalties for any reason, including non-medical reasons. But if you’re making a withdrawal for non-medical expenses, the withdrawals are taxed as ordinary income.

How To Use an HSA

To avoid taxes and penalties, HSA withdrawals must be used for qualified medical expenses as defined by the IRS. These are generally the same expenses that would qualify for the medical and dental expense deduction on your tax return.

Eligible medical expenses

Common eligible medical expenses include, but are not limited to:

• Doctor, dentist and hospital fees
• Dental treatments (excluding cosmetic work)
• Vision care
• Mental health treatment
• Medical equipment and supplies
• Prescription medications (including insulin)
• Certain transportation and travel costs for medical care
• Health and long-term care insurance premiums
• Nursing home or assisted living expenses
• Expenses to accommodate a disability

Excluded medical expenses

These common expenses are specifically excluded from HSAs:

• Cosmetic procedures (e.g., Botox, teeth whitening)
• Gym memberships and spa services
• Over-the-counter medications
• Babysitting and childcare for healthy children
• Maternity clothes
• Funeral expenses
• Non-prescribed controlled substances
• Surrogacy expenses

Payments and reimbursements

Many HSAs come with a linked debit card for direct payment, but you can also pay out-of-pocket with cash or a rewards credit card and reimburse yourself later. In either case, keep receipts and records to prove they were medical-related costs in case the IRS ever questions your withdrawals.

Also, there’s no time limit for reimbursement. You can pay for a qualified medical expense today and reimburse yourself years later—giving your money time to grow tax-free in the meantime. But to do that, you’ll need excellent records.

Investment Options With HSAs

By default, HSA funds are typically held in a savings account, such as a high yield savings account, that pays you interest on your balance. HSA savings accounts generally come with FDIC insurance, which protects your balance (up to legal limits) if the bank fails. However, you can also invest HSA funds for potentially more significant earnings. HSAs often offer a broad investment menu, including mutual and exchange-traded funds. You may have to keep a certain minimum balance in cash or reach a certain balance to unlock investment features.

If you’re looking for more growth potential, many HSA providers offer investment options, including mutual funds and exchange-traded funds (ETFs). Investment menus vary by provider—some offer low-cost index funds and diversified options, while others may be more limited. However, you may have to keep a certain minimum cash balance (e.g., $1,000) or reach a minimum total account balance to unlock investment features. Keep in mind that investing HSA funds carries market risk and you can lose money. But for long-term savers—especially those planning to use their HSA as a retirement healthcare fund—investing can offer the opportunity for higher returns over time. If you’re unsure how to start, consider speaking with a trusted financial advisor to align your investment choices with your overall financial strategy.

READ MORE: How Do I Research a Stock Before Investing?

HSA Management and Reporting

As mentioned earlier, keeping thorough records of your HSA-eligible medical expenses is essential—especially if you’re reimbursing yourself later. While you may never be audited, the IRS requires that you be able to verify that any tax-free HSA withdrawals were used for qualified expenses. That means holding onto documentation well beyond the date of payment or reimbursement. Here are a few popular ways to stay organized:

• Paper folders and printed receipts: Set up a yearly folder for invoices, receipts and explanations of benefits. A written list of expenses can help you quickly reference reimbursement totals down the road.
• Digital spreadsheets or apps: Use a spreadsheet to log each expense, payment method and reimbursement status. It’s a simple but effective way to track your HSA activity over time.
• HSA tracking tools: Tools like HSATracker.org are designed specifically for managing medical expenses and tracking reimbursements over multiple years.

No matter how you track expenses, consistency is key. Good recordkeeping helps you take full advantage of your HSA’s benefits while protecting yourself in case of an IRS inquiry.

The Future of Your HSA

An HSA isn’t just a tool for paying medical bills—it can also be a long-term wealth builder and a key part of your retirement strategy.

Long-term benefits of HSAs

With consistent contributions and smart usage, your HSA can help you save thousands of dollars over time—both on medical costs and taxes. Since HSA funds never expire, you can carry the balance forward indefinitely, which allows the account to compound over time—potentially giving you a sizable cushion for future healthcare costs. That’s perfect for early retirement or tax-free withdrawals later in life.

Using HSA funds in retirement

The unique nature of HSA taxes makes it a valuable asset for retirement. There are several ways an HSA can factor into your retirement strategy. The most straightforward use of an HSA in retirement is for medical costs. As healthcare can be extremely expensive for retirees, having the opportunity to withdraw tax-free to cover qualified medical costs is welcome for many households. If you need funds for other purposes, you can withdraw from the account without additional penalties, though ordinary income taxes apply. In that case, your HSA functions much like a 401(k) or traditional IRA.

Many people don’t realize there is a third way to use HSA funds in retirement. Because you’re not required to reimburse yourself for past medical expenses right away, you can keep a tally of prior medical expenses for future reimbursement. For example, if you have $30,000 of medical expenses from the last 20 years and have not reimbursed yourself yet, you can take up to that $30,000 from your HSA any time you want, tax-free. That includes withdrawals during a traditional or early retirement.

HSA inheritance rules

If you pass away, your HSA’s future depends on who inherits it:

• A spouse can take over the account tax-free and use it as their own.
• A non-spouse beneficiary must close the account, and the full balance becomes taxable income in the year of your death.

That tax hit makes it worth factoring your HSA into your broader estate planning strategy.

Is an HSA Right for You?

If you’re enrolled in a high-deductible health plan, an HSA is one of the most tax-advantaged tools available—offering flexibility for today’s medical costs and long-term benefits for retirement planning. Whether you’re focused on cutting healthcare expenses now or building a tax-efficient nest egg for later, an HSA can be a smart addition to your financial strategy.

Not sure where to start? Talk to your employer or a trusted financial advisor to explore your options and make the most of what an HSA has to offer.

READ MORE: Financial Planning for Those Who Don’t Like Finances

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