HSA Calculator

Quick Answer

Last updated: 10 November 2026 ·How we calculate this: IRS 2026 HSA limits and the future value formula

How This HSA Calculator Works

Choose self-only or family coverage, enter your age, what you and your employer put in each year, your current balance, how long you will keep investing, a return and your tax rates. The calculator shows your 2026 limit, warns if you go over it, works out the tax your own contributions save, and grows the account year by year as if you leave it invested.

How to Use the HSA Calculator

1. Choose self-only or family HDHP coverage and enter your age.
2. Enter your and your employer's yearly contributions.
3. Enter your balance, years to invest and expected return.
4. Enter your tax rates and how you contribute.
5. Press Calculate to see your limit, tax saving and future balance.

2026 HSA Limits

To contribute you must be covered by a high-deductible health plan (HDHP), have no other disqualifying coverage, not be enrolled in Medicare and not be claimed as a dependent.

Formulas Used

• Limit: $4,400 (self-only) or $8,750 (family), plus $1,000 at 55 or older
• Tax saved: your contribution × (federal rate + state rate + 7.65% if through payroll)
• Balance: B × (1 + r)^n + C × ((1 + r)^n − 1) ÷ r, where C is your plus your employer's yearly contribution

Key Terms

• HSA: health savings account, a tax-advantaged account for medical costs.
• HDHP: high-deductible health plan, required to contribute to an HSA.
• Catch-up contribution: the extra $1,000 allowed at 55 or older.
• Qualified medical expense: a health cost the IRS allows to be paid tax-free from an HSA.
• FICA: Social Security and Medicare taxes, 7.65% of pay for most employees.

Worked Example

A 56-year-old with family coverage puts in $8,750 on their own, gets $1,000 from an employer, has $20,000 saved and expects 5% a year for 9 years. Their federal rate is 24% and their state has no income tax.

• Limit: $8,750 + $1,000 catch-up = $9,750.00
• Going in: $8,750 + $1,000 = $9,750, which is within the limit
• Tax saved each year: 8,750 × 24% = $2,100.00
• Balance after 9 years: about $138,535.57

Real-Life Examples

• Checking the limit: $3,400 from you and $1,000 from an employer fits under the $4,400 self-only limit exactly.
• Tax saving: that $3,400 through payroll saves about $1,178.10 a year at 22% federal, 5% state and 7.65% FICA.
• Long-term growth: $5,000 plus $4,400 a year at 6% grows to about $376,573.48 in 30 years.
• Catch-up years: at 56 with family coverage, the limit is $9,750.00.

HSA vs FSA

• HSA: needs an HDHP, the money is yours and rolls over every year, and it can be invested.
• FSA: offered by employers with many plan types, but unused money is mostly lost at year end, and it cannot be invested.
• If you can choose an HDHP and afford the deductible, an HSA usually offers bigger long-term tax savings.

Using an HSA for Retirement

Because money is not taxed on the way in or out when spent on medical care, many people pay current medical bills from their regular income and leave the HSA invested. Keep receipts: you can reimburse yourself later for qualified expenses paid after the HSA was opened.

After 65, you can take money out for any reason without the 20% penalty; non-medical withdrawals are then taxed as income, like a traditional IRA. Before 65, non-medical withdrawals are taxed and usually face a 20% additional tax. Once you enroll in Medicare you can no longer contribute, but you can keep using the balance.

Common Mistakes to Avoid

• Forgetting employer money. It counts toward your limit.
• Contributing without an HDHP. You must have qualifying coverage for each month you contribute.
• Leaving cash uninvested. Many HSAs pay little interest unless you choose investments.
• Losing receipts. Keep them to prove withdrawals were for qualified expenses.
• Contributing after Medicare starts. Contributions must stop when you enroll.

Frequently Asked Questions

References & Sources