HSA Contribution Limits (IRS Rev. Proc. 2025-19)

FSA Contribution & Rollover Limits (IRS Rev. Proc. 2025-39)

Historical HSA Contribution Limits (2020–2026)

HSA vs FSA Calculator: Complete Guide for 2026

Choosing between a Health Savings Account (HSA) and a Flexible Spending Account (FSA) is one of the most impactful benefits decisions you can make during open enrollment. Both accounts offer significant tax savings on healthcare expenses — but they work very differently, have different eligibility requirements, and the long-term financial implications are dramatically different. Our free HSA vs FSA calculator uses the official 2026 IRS contribution limits and your personal tax situation to show you exactly which account saves you more money, both this year and over decades.

What Is an HSA (Health Savings Account)?

An HSA is a tax-advantaged savings account available to individuals enrolled in a qualifying High Deductible Health Plan (HDHP). It offers what financial planners call a “triple tax advantage” — the most powerful tax benefit of any savings account in the U.S. tax code:

• Contributions are pre-tax (or tax-deductible): Money going in reduces your taxable income dollar-for-dollar, saving federal income tax, state income tax (in most states), and FICA taxes when contributed through payroll.
• Growth is tax-free: Any interest, dividends, or capital gains earned inside the HSA accumulate completely tax-free — no annual tax on earnings.
• Qualified withdrawals are tax-free: When you spend HSA funds on qualified medical expenses, no tax is owed — ever. Not now, not later.

The 2026 HSA contribution limits are $4,400 for self-only coverage and $8,750 for family coverage, with an additional $1,000 catch-up contribution if you are age 55 or older. These are confirmed by IRS Revenue Procedure 2025-19.

What Is an FSA (Flexible Spending Account)?

An FSA is an employer-sponsored account that allows you to set aside pre-tax dollars for qualified healthcare or dependent care expenses. Unlike HSAs, FSAs do not require a high-deductible health plan, making them available to anyone whose employer offers them. The primary tax advantage is the same — pre-tax dollars reduce your federal income tax and FICA taxes — but the FSA has a critical limitation: it is generally use-it-or-lose-it.

The 2026 healthcare FSA limit is $3,350 (official per IRS Revenue Procedure 2025-39). Employers may allow either a $670 rollover of unused funds to the next year OR a 2.5-month grace period — but not both. Any amount beyond the rollover or grace period is forfeited if not used.

How the HSA vs FSA Calculator Works

Enter your gross income and filing status — the calculator automatically suggests your likely federal tax bracket. Then select your state for state income tax savings. Enter your planned HSA and FSA contribution amounts. The calculator computes:

• Federal income tax savings — contributions × your marginal rate
• FICA tax savings (7.65%) — available when contributions go through payroll deduction (Section 125 cafeteria plan). Note: FICA savings are not available for direct HSA contributions made outside of payroll.
• State income tax savings — based on your state rate. Note: California, New Jersey, and Alabama do NOT allow HSA deductions at the state level.
• Long-term HSA investment growth — projected using your entered annual return and investment horizon
• FSA forfeiture risk — estimated unused funds based on your medical expenses vs. contribution

2026 HSA Eligibility Requirements

To contribute to an HSA in 2026, you must meet ALL of these requirements:

• Be enrolled in a qualifying High Deductible Health Plan (HDHP) with a minimum deductible of $1,650 (self-only) or $3,300 (family) and maximum out-of-pocket of $8,300 (self-only) or $16,600 (family)
• Not be covered by any other non-HDHP health plan
• Not be enrolled in Medicare (Part A or Part B)
• Not be claimed as a dependent on someone else’s tax return
• Have no general-purpose FSA (you CAN have a Limited Purpose FSA for dental/vision only)

If you have an HSA and enroll in Medicare, you must stop contributing. However, you can continue spending existing HSA funds tax-free on qualified expenses — including Medicare premiums, Medicare Advantage premiums, and Medicare Part D premiums after age 65.

The HSA as a Retirement Account

One of the most underutilized strategies in personal finance is treating the HSA as a stealth retirement account. The math is compelling:

• A 35-year-old contributing the maximum $4,400/year to a self-only HSA with a 6.5% annual return would have approximately $344,000 by age 65 in completely tax-free money — if never used for medical expenses along the way.
• After age 65, HSA funds can be withdrawn for ANY purpose (not just medical) and are taxed as ordinary income — identical to a Traditional IRA. But unlike an IRA, there are no required minimum distributions (RMDs) from an HSA.
• Medical expenses in retirement are often the largest expense category. Using a fully-funded HSA to pay tax-free for Medicare premiums, dental care, prescriptions, and long-term care insurance premiums can save tens of thousands in taxes.

The optimal HSA strategy for those who can afford it: maximize contributions, pay current medical expenses out-of-pocket while saving receipts, let the HSA invest and grow, and reimburse yourself for past expenses in retirement (the IRS has no time limit on reimbursements for expenses incurred after the account was opened). Use our Federal Income Tax Calculator to model the full tax impact.

When an FSA Is the Better Choice

Despite the HSA’s advantages, an FSA can be the right choice in specific situations:

• No HDHP access: If your employer only offers a traditional low-deductible plan, you cannot open an HSA. An FSA is your only pre-tax healthcare option.
• High predictable expenses early in the year: FSA funds are available in full on January 1, even if you haven’t contributed that amount yet. If you need surgery in February, an FSA-funded balance is immediately accessible; your HSA can only spend what has been deposited.
• Dependent Care costs: A Dependent Care FSA (up to $5,000/household) is entirely separate from a healthcare FSA and can be combined with an HSA. If you pay for childcare, after-school programs, or elder care, a Dependent Care FSA is extremely valuable.
• Low out-of-pocket risk tolerance: If you’re uncomfortable with a high-deductible plan and the up-front cost risk it entails, the FSA with a traditional plan may provide more peace of mind.

States That Do Not Allow HSA Deductions

While most states conform to the federal HSA tax treatment, three states do not allow state income tax deductions for HSA contributions:

• California — HSA contributions are not deductible for state income tax, and HSA earnings are taxable at the state level. California also taxes non-qualified withdrawals.
• New Jersey — Does not recognize HSAs for state tax purposes. Contributions are not deductible at the state level.
• Alabama — Does not conform to federal HSA rules for state income tax purposes.

Residents of these states still receive federal income tax and FICA savings, but miss out on state-level deductions. Our calculator automatically accounts for this when you select your state.

Frequently Asked Questions