Health Savings Account:
Definition, Benefits, Comparison & Uses

A Health Savings Account (HSA) is a tax-advantaged savings account that allows individuals enrolled in high-deductible health plans to set aside pre-tax money to pay for qualified medical expenses. The account provides three distinct tax benefits: contributions reduce taxable income, funds grow tax-free through interest or investment returns, and withdrawals for qualified medical expenses are not taxed. This triple-tax advantage makes HSAs more beneficial than traditional retirement accounts like 401(k)s or IRAs.

HSAs pair exclusively with HSA-eligible high-deductible health plans (HDHPs). The account holder owns the HSA, meaning the funds remain with them regardless of employment changes or retirement. Unlike health care flexible spending accounts (FSAs), HSAs do not have "use-it-or-lose-it" rules, unused funds roll over year to year without limit and continue earning tax-free interest.

Related terms: High Deductible Health Plan (HDHP), Health Reimbursement Arrangement (HRA), Flexible Spending Account (FSA), qualified medical expenses

An HSA works by pairing with an HSA-eligible high-deductible health plan. Once enrolled in an HDHP, individuals can open an HSA through their employer, a bank, or a financial institution. The account holder then makes pre-tax contributions from their paycheck, similar to 401(k) contributions, or makes after-tax contributions that can be deducted on personal tax returns.

Many employers contribute to employee HSAs through premium pass-through payments, typically crediting a portion of the health plan premium into the account each month. These employer contributions do not count as taxable income. Account holders can then use accumulated funds to pay for qualified medical expenses, including deductibles, copayments, coinsurance, and certain services not covered by their health plan.

The account functions like a personal bank account where funds can be withdrawn via debit card, check, or withdrawal request. Any money not used accumulates without limit and can be invested in bank accounts, certificates of deposit, stocks, bonds, mutual funds, or certain types of bullion or coins. Investment earnings grow tax-free, providing long-term wealth-building potential for future medical expenses or retirement.

The IRS sets annual HSA contribution limits. For 2026, individuals with self-only HDHP coverage can contribute up to $4,400, an increase of $100 from 2025. Those with family HDHP coverage can contribute up to $8,750, an increase of $200 from 2025.

These limits include both employee and employer contributions combined. If an employer deposits $1,000 into an HSA, the employee can only contribute the remaining amount up to the annual maximum. Individuals age 55 to 65 can make additional catch-up contributions of $1,000 per year. If both spouses are over 55, each can contribute $1,000 in catch-up contributions, but the spouse must open their own separate HSA.

Account holders have until the federal tax filing deadline (typically April 15) to make contributions for the previous tax year. Contributing the maximum amount with pre-tax dollars reduces net out-of-pocket costs and maximizes tax savings, especially for those in higher tax brackets.

To be eligible to contribute to an HSA, individuals must meet 4 specific requirements set by the IRS:

• Be enrolled in an HSA-eligible high-deductible health plan
• Not be covered by any other non-HDHP health insurance, including through a spouse or parent
• Not be enrolled in Medicare
• Cannot be claimed as a dependent on someone else's tax return

Individuals enrolled in TRICARE, covered by a spouse's family HMO enrollment, participating in a general-purpose health care flexible spending account, or who have received VA or IHS healthcare benefits within the previous 3 months are not eligible for HSAs. However, they may still have disability insurance, dental coverage, vision insurance, and long-term care policies without affecting HSA eligibility.

Filing jointly with a spouse does not disqualify an individual from HSA eligibility, being married and filing jointly is different from being claimed as a dependent. Once individuals enroll in Medicare, they can no longer contribute to an HSA, though they can continue using accumulated funds for qualified expenses.

HSA funds can be used tax-free to pay for qualified medical expenses as defined by IRS Code Section 213(d). These expenses include 10 major categories:

• Medical plan deductibles, copayments, and coinsurance
• Doctor visits and diagnostic services
• Prescription medications and certain over-the-counter drugs
• Preventive care services
• Physical therapy and addiction treatment
• Medical equipment and hospital services
• Most dental care, including orthodontia
• Most vision care, including LASIK surgery, contacts, and eyeglasses
• Medicare Part B and Part D premiums (after age 65)
• Long-term care insurance premiums

HSA funds can also cover qualified medical expenses for spouses and covered dependents. However, most health insurance premiums cannot be paid with HSA funds, with specific exceptions including premiums while receiving Federal unemployment compensation, Medicare premiums, and other health insurance premiums after age 65 (excluding Medigap policies).

Before age 65, withdrawals for non-qualified expenses incur a 20% tax penalty plus regular income tax. After age 65, HSA funds can be used for any purpose, but non-medical withdrawals are subject to regular income tax (no penalty). This flexibility makes HSAs function similarly to traditional retirement accounts after age 65, while maintaining tax-free status for medical expenses at any age.

Account holders can only use the funds currently available in their HSA, the account functions like a checking account where withdrawals are limited to the accumulated balance. Unlike health care flexible spending accounts where the full annual election is available immediately, HSA funds must accumulate through contributions before they can be spent.

If an account holder has surgery in January requiring $1,000 for the deductible but only has $200 in the HSA, they must either pay the remaining $800 out-of-pocket or wait until additional contributions accumulate. Employers typically contribute their premium pass-through on a monthly basis, and employees can make additional voluntary contributions at any time up to the annual maximum.

HSAs provide a triple-tax advantage that exceeds the benefits of traditional retirement accounts. Contributions made through payroll deductions are pre-tax, which reduces taxable income. For individuals who contribute after-tax dollars, the full contribution amount is tax-deductible "above the line" on federal tax returns, meaning the deduction applies regardless of whether the taxpayer itemizes or uses the standard deduction.

The tax savings are substantial across income brackets. Someone in the 22% federal income tax bracket could potentially save nearly 30% in combined federal income, FICA (Medicare and Social Security), and potentially state income taxes on every dollar contributed to an HSA. This represents significant money available for medical spending that would otherwise go to taxes.

All interest and investment earnings within the HSA grow tax-free. Unlike taxable investment accounts where gains trigger tax obligations, HSA investment returns compound without any tax liability. Withdrawals for qualified medical expenses remain tax-free at any age, creating a permanent tax shelter for healthcare costs. After age 65, non-medical withdrawals are taxed as ordinary income but avoid the 20% early withdrawal penalty, functioning similarly to traditional IRA distributions.

Employers also benefit from tax advantages. Employer contributions to employee HSAs are tax-deductible as business expenses. Additionally, employers save 7.65% on FICA taxes for every pre-tax dollar employees contribute through payroll deductions, as these contributions are not subject to Social Security and Medicare taxes.

HSA contributions reduce taxable income through two mechanisms. Contributions made via payroll deduction are excluded from gross income before taxes are calculated, similar to 401(k) contributions. This provides immediate tax savings by lowering the amount subject to federal income tax, FICA taxes, and potentially state income taxes.

For contributions made with after-tax dollars outside of payroll (such as direct deposits to an HSA), account holders can claim an "above the line" tax deduction when filing federal income taxes. This deduction reduces adjusted gross income and applies whether the taxpayer itemizes deductions or takes the standard deduction. The deduction is claimed by completing IRS Form 8889 with the tax return.

HSA-eligible high-deductible health plans (HDHPs) are health insurance plans that meet specific IRS requirements for minimum deductibles and maximum out-of-pocket costs. For 2026, HDHPs must have minimum annual deductibles of $1,700 for self-only coverage and $3,400 for family coverage. The maximum out-of-pocket limits are capped at $8,500 for self-only coverage and $17,000 for family coverage.

HDHPs typically feature lower monthly premiums compared to traditional health plans. In exchange for the lower premium, the account holder pays more out-of-pocket before insurance benefits begin. However, preventive care services are covered at 100% with no cost to the patient when using in-network providers, these services are not subject to the deductible.

Once the annual deductible is met, the HDHP pays benefits similar to traditional health plans. A key advantage of HDHPs is that all covered expenses, including deductibles, copayments, coinsurance, and prescription drugs, count toward the catastrophic limit. Once this limit is reached, the plan covers all remaining in-network covered services at 100% for the rest of the year. This differs from traditional plans where certain costs like prescription copayments may not count toward catastrophic limits.

HSA account holders own their accounts completely, the HSA belongs to the individual, not the employer. When changing jobs, the entire HSA balance transfers with the account holder. Funds can be moved to a new employer-sponsored HSA or remain with the current HSA trustee.

Upon retirement, the HSA continues to belong to the retiree. If the retiree remains enrolled in the same HDHP and is not enrolled in Medicare, they can continue making contributions. Retirees enrolled in Medicare can no longer make new HSA contributions but can use accumulated funds tax-free for qualified medical expenses, including Medicare Part B and Part D premiums.

HSAs are not subject to required minimum distributions (RMDs) at any age, unlike 401(k)s and traditional IRAs. This provides flexibility in retirement income planning, allowing retirees to preserve HSA funds as long as desired. If the HSA account holder dies, a surviving spouse can inherit the HSA tax-free and continue using it as their own. Non-spouse beneficiaries receive the account balance as taxable income.

HSA account holders can invest their funds to potentially grow their medical savings over time. Investment options typically include bank accounts, certificates of deposit, stocks, bonds, mutual funds, and certain types of bullion or coins as defined by IRS Code Section 408(m)(3).

Most HSA trustees require a minimum balance to remain in cash before allowing investments, this threshold varies by provider. Some trustees offer automated investing options like robo advisors and low-cost index funds. Investment earnings, including interest, dividends, and capital gains, grow completely tax-free within the HSA.

Only 21% of HSA participants invest their assets, meaning most Americans miss this valuable wealth-building opportunity. By investing at least a portion of HSA funds, account holders can build substantial savings for future medical expenses. According to the 2025 Fidelity Retiree Health Care Cost Estimate, a 65-year-old individual may need $172,500 in after-tax savings to cover health care expenses in retirement, an HSA provides a tax-advantaged way to accumulate these funds.

Health Savings Accounts are often compared to 3 related healthcare accounts:

HSA vs. Health Reimbursement Arrangement (HRA)

The primary difference between an HSA and HRA is ownership. An HSA is owned by the individual account holder, while an HRA is owned and funded entirely by the employer. Employees cannot make voluntary contributions to HRAs. HRA funds typically do not earn interest, and unused credits are forfeited if the employee switches health plans or leaves federal employment (unless retiring). HSAs, by contrast, remain with the individual regardless of employment status, earn tax-free interest, and allow both employee and employer contributions up to IRS limits.

HSA vs. Health Care Flexible Spending Account (FSA)

HSAs differ from Health Care FSAs in portability and long-term savings potential. FSAs are subject to "use-it-or-lose-it" rules where funds must be used during the plan year or be forfeited (with limited exceptions). FSAs are employer-owned and tied to the health plan, so employees lose the account when changing jobs. HSAs have no use-it-or-lose-it provision, funds roll over indefinitely and can be invested for growth. Individuals enrolled in HDHPs with HSAs cannot have general-purpose Health Care FSAs, but can have Limited Expense FSAs restricted to dental and vision expenses.

HSA vs. Limited Expense Health Care FSA (LEX HCFSA)

A Limited Expense Health Care FSA is specifically designed for individuals enrolled in HDHPs with HSAs. IRS rules prohibit HDHP/HSA enrollees from having general-purpose Health Care FSAs, but allow LEX HCFSAs that cover only eligible dental and vision care expenses. This combination lets employees use pre-tax FSA dollars for dental and vision costs while preserving HSA funds for other medical expenses or long-term savings. LEX HCFSAs are administered through FSAFEDS for federal employees and have annual contribution limits separate from HSA limits.

Excess HSA contributions can be corrected by withdrawing the excess amount and any earnings on that excess before April 15th of the following year. The account holder must pay income tax on the excess contribution and on any earnings from the excess, but no 20% penalty applies to this corrective withdrawal.

If excess contributions remain in the HSA after April 15th, the IRS imposes a 6% excise tax on the excess amount and its earnings. This 6% tax applies every year the excess contribution remains in the account. To avoid the recurring penalty in subsequent years, the account holder can reduce the following year's maximum contribution by the amount of the previous year's excess contribution.

Individuals can have multiple HSAs, though the combined contributions across all accounts cannot exceed the annual IRS limit. Some people maintain two HSAs, one for investing long-term savings and another for holding cash to pay immediate medical expenses. Account holders can also transfer funds from one HSA trustee to another, though the original health plan typically does not pay administrative fees when using a different trustee than the plan established.

Individuals enrolled in Medicare Part A or Part B are not eligible to make new contributions to an HSA. However, they can continue using accumulated HSA funds tax-free for qualified medical expenses, including Medicare premiums for Part B, Part D, and Medicare Advantage plans (but not Medigap policies).

When someone enrolled in an HDHP with an HSA becomes Medicare-eligible, the health plan discontinues HSA contributions and typically opens a Health Reimbursement Arrangement (HRA) instead. The existing HSA remains the account holder's property with all accumulated funds available for use. Retirees should carefully consider whether to enroll in Medicare or maintain HDHP coverage, as Medicare Part B premiums may increase if enrollment is delayed past initial eligibility.

Married couples where one spouse is enrolled in an HDHP with family coverage can contribute up to the family maximum ($8,750 for 2026) to their HSA. The HSA can pay for qualified medical expenses for both spouses and covered dependents, even if the other spouse has separate health insurance coverage (as long as the HSA account holder is not covered by that other insurance).

For catch-up contributions, if both spouses are age 55 or older, each can contribute an additional $1,000, but the second spouse must open their own separate HSA for their catch-up contribution. Filing jointly as spouses does not disqualify HSA eligibility, being married and filing jointly is different from being claimed as a dependent on someone else's return.