HSA vs FSA Calculator 2026

How HSA vs FSA Calculator Works

Compare HSA vs FSA tax savings for 2026. Find which health account saves more based on your medical expenses and tax bracket. Enter your values into the form above and the calculator processes them instantly in your browser — no data is sent to any server.

HSA vs FSA: What's the Difference?

An HSA (Health Savings Account) is a tax-advantaged account only available to people enrolled in a High-Deductible Health Plan (HDHP). For 2026, the IRS contribution limits are $4,300 for self-only coverage and $8,550 for family coverage. An FSA (Flexible Spending Account) can be offered with any employer health plan, with a 2026 limit of $3,300. Both reduce your taxable income, but HSAs offer three distinct tax advantages: contributions are pre-tax, growth is tax-free, and qualified withdrawals are tax-free — the "triple tax advantage."

The most significant practical difference is the rollover rule. FSA funds typically expire at year end (employers may allow a $660 carry-over or a 2.5-month grace period for 2026). HSA balances roll over indefinitely and can be invested in mutual funds or ETFs, making the HSA a powerful long-term healthcare savings vehicle used by many Americans as a "stealth IRA."

2026 HSA and FSA Contribution Limits

The IRS sets annual inflation-adjusted limits for both accounts. For 2026: HSA self-only is $4,300 (up $100 from 2025), HSA family is $8,550 (up $200 from 2025), and the FSA limit is $3,300 (up $100 from 2025). To qualify for an HSA in 2026, your HDHP must have a minimum deductible of $1,650 (self) or $3,300 (family) and a maximum out-of-pocket of $8,300 (self) or $16,600 (family).

Who Should Choose an HSA vs FSA?

Choose an HSA if: you are enrolled in an HDHP, you are generally healthy with predictable low medical costs, you want to invest unused funds for tax-free long-term growth, or you are building a healthcare nest egg for retirement (after age 65, HSA funds can be used for any purpose, not just medical). Choose an FSA if: you are not eligible for an HDHP (or prefer a lower-deductible plan), you have predictable high medical expenses each year that you will definitely spend, or your employer does not offer an HDHP option. Note: you cannot have both an HSA and a general-purpose FSA simultaneously.

FICA Tax Savings — an Often-Missed Benefit

Both HSA and FSA contributions made through payroll deduction reduce your FICA (Social Security + Medicare) taxable wages, saving an additional 7.65% on top of income tax savings. On a $3,000 FSA contribution, that's an extra $230 in FICA savings most people don't account for. This calculator includes FICA savings in the total, which is why the real savings are often 30-40% higher than just the income tax rate suggests.