When an HSA makes sense for your money

Contribute to an HSA if you have a high-deductible health plan (HDHP) and expect medical costs in the next few years, or if you can afford to leave money untouched until retirement. An HSA is worth using mainly because contributions reduce your taxable income, withdrawals for medical bills are tax-free, and unused money rolls forward indefinitely—unlike a flexible spending account (FSA), which you lose at year-end.

The math works against you only if you have low medical costs, cannot afford to save, or already have an FSA through your employer. If your employer offers both, you must choose one or the other, not both. If you rarely see a doctor and your HDHP premium is already low, the tax savings may not outweigh the risk of having a high deductible when you do need care.

Key Takeaways

  • HSA contributions lower your taxable income dollar-for-dollar, and withdrawals for medical expenses are never taxed, making it the only account with this dual tax advantage.
  • You can only open an HSA if you are enrolled in an HDHP; if your plan does not meet the IRS definition, you cannot contribute regardless of how much you want to save.
  • Money in an HSA stays yours forever and grows tax-free, so it functions as a retirement account if you do not spend it on medical bills.
  • If you have access to an FSA through your employer, you cannot use an HSA in the same year, so you must decide which account fits your situation better.
  • The decision hinges on three things: whether you can afford to save, whether you expect medical costs soon, and whether the tax savings beat the risk of a high deductible.

How the tax math works in your favor

An HSA gives you a tax break on both the way in and the way out. Money you contribute reduces your gross income before federal income tax is calculated. If you earn $60,000 and contribute $4,150 to an HSA in 2024, your taxable income drops to $55,850. At a 22% tax bracket, that saves you roughly $913 in federal tax that year.

When you withdraw that money to pay a doctor, pharmacy, or hospital bill, you owe no income tax on the withdrawal. No other savings account works this way. A regular savings account earns interest that gets taxed. A 401(k) lets you avoid tax on contributions but taxes withdrawals in retirement. An HSA avoids tax on both ends if you use it for medical expenses.

Self-employed people and those who buy insurance on their own benefit most because they can deduct HSA contributions on their tax return even if they do not itemize deductions. Employees who contribute through payroll also skip the 7.65% self-employment tax (if self-employed) or the employee portion of payroll tax (if employed), adding another layer of savings.

When you should not contribute

Do not contribute if you cannot afford to set aside the money. An HSA is not a checking account. The point is to save for medical costs you will face later, not to fund your HSA and then immediately withdraw the money to cover everyday expenses. If you are living paycheck to paycheck, the tax savings do not matter because you will not actually save anything.

Do not contribute if you have predictable, high medical costs in the next year or two and your HDHP deductible is very high. If you know you will spend $8,000 on medical care and your deductible is $7,000, you will pay that deductible regardless of whether you have an HSA. The tax savings on the contribution may not offset the risk that you will face a large bill before you have saved enough to cover it.

Do not contribute if you are enrolled in Medicare, Medicaid, TRICARE, or the Veterans Health Administration. These programs disqualify you from HSA contributions. If you turn 65 and enroll in Medicare, you can no longer contribute to an HSA, though you can continue to withdraw money for medical expenses without penalty.

HSA versus FSA: which account to choose

If your employer offers both an HSA and an FSA, you must pick one for the year. You cannot contribute to both. The choice depends on whether you expect to spend the money soon and whether you value the ability to carry money forward.

An FSA lets you set aside up to $3,300 per year (in 2024) and withdraw it tax-free for medical expenses, but any money left over at year-end is forfeited—with a small grace period in some plans. An HSA has a higher contribution limit ($4,150 for individual coverage in 2024), and unused money rolls forward forever. If you have chronic conditions or regular prescriptions, an FSA works well because you will spend the money. If your medical costs vary year to year, an HSA is safer because you do not lose what you do not spend.

An HSA also stays with you if you change jobs, while an FSA is tied to your employer. If you plan to leave your job soon, an HSA is the better choice because you keep the account and the money in it.

How much to contribute if you decide to save

Start by estimating your medical costs for the year: insurance premiums (if you pay them), deductible, copays, prescriptions, dental work, vision care, and any planned procedures. If you expect to spend $3,000 and your HDHP deductible is $2,000, you might contribute $2,000 to $3,000 to cover the gap between what insurance pays and what you pay out of pocket.

If you have low medical costs and want to use the HSA as a retirement account, contribute the maximum allowed. The contribution limit for 2024 is $4,150 for individual coverage and $8,300 for family coverage. These limits increase slightly each year. Money you do not spend on medical bills can stay invested in the HSA and grow tax-free until you retire, at which point you can withdraw it for any reason (though non-medical withdrawals are taxed like regular income).

If you are unsure, contribute enough to cover your deductible. That ensures you have cash on hand if you need unexpected care, and you still get the tax savings on the contribution.

What happens if you do not use the money

Unlike an FSA, an HSA does not penalize you for not spending the money. Unused funds stay in the account and can be invested in mutual funds or left in cash, depending on your HSA provider. The money grows tax-free whether you use it or not. If you retire at 65 with $50,000 in your HSA, you can withdraw it for medical expenses tax-free, or withdraw it for any reason and pay income tax only on the amount you withdraw (not a penalty, just regular income tax).

This makes an HSA a powerful retirement savings tool if you can afford to leave the money alone. Many people use it as a third retirement account alongside a 401(k) and IRA because the tax advantages are so strong. If you have the income to max out your 401(k) and IRA, an HSA is the next place to save.

The risk of a high deductible

An HDHP has a lower premium than a traditional plan, but a higher deductible. In 2024, an HDHP deductible must be at least $1,600 for individual coverage or $3,200 for family coverage to may have access to for HSA contributions. Some plans have deductibles of $5,000 or higher. If you have a serious illness or injury, you will pay that full deductible before insurance starts to help.

An HSA helps you prepare for this risk by letting you set aside pre-tax money, but it does not eliminate the risk. If you cannot afford to pay a $5,000 deductible out of pocket, an HDHP is not the right plan for you, regardless of whether you contribute to an HSA. Before you enroll in an HDHP, make sure you have enough savings to cover the deductible if something goes wrong.

Frequently Asked Questions

Can I contribute to an HSA if I am self-employed?

Yes, as long as you have an HDHP. You can deduct HSA contributions on your tax return even if you do not itemize deductions, and you avoid self-employment tax on the contribution. This makes an HSA particularly valuable for self-employed people.

What if I switch jobs mid-year?

Your HSA stays with you. You own the account, not your employer. You can continue to contribute if your new employer offers an HDHP, or you can stop contributing and just use the money you have already saved. If your new employer offers an FSA, you cannot contribute to both the HSA and FSA in the same year.

Can I use HSA money to pay for my spouse's medical bills?

Yes. HSA money can be used for medical expenses of you, your spouse, and any dependent you claim on your tax return, regardless of whether they are covered by your HDHP.

What counts as a medical expense for HSA withdrawals?

may have access to medical expenses include insurance deductibles, copays, prescriptions, dental work, vision care, mental health treatment, and many medical devices and supplies. Over-the-counter medications count only if you have a prescription. Cosmetic procedures do not count unless they treat an injury or illness.

Should I contribute if I know I will not spend the money?

Yes, if you can afford to save it. The tax savings on the contribution alone make it worth using, and the money grows tax-free for retirement. Treat it as a long-term savings account, not a spending account.