HSA Calculator: 2026 Limits, Tax Savings and Long-Term Growth
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An HSA calculator projects your balance with FV = B × (1 + i)ᴺ + c × ((1 + i)ᴺ − 1) ÷ i, where c is the monthly net contribution. At 6% a year, $3,500 a year ($3,000 yours plus $500 from your employer) on top of a $2,000 balance grows to about $305,000 in 30 years.
Putting $3,000 a year into an HSA, with $500 from your employer, grows to about $305,029 in 30 years at 6.0%. You save about $1,010 in tax each year, $30,285 in total, and the growth is not taxed when spent on qualified medical costs.
Balance by year
| Years | Balance | Net paid in | Growth |
|---|---|---|---|
| 5 | $23,047 | $19,500 | $3,547 |
| 10 | $51,437 | $37,000 | $14,437 |
| 15 | $89,730 | $54,500 | $35,230 |
| 20 | $141,382 | $72,000 | $69,382 |
| 25 | $211,053 | $89,500 | $121,553 |
| 30 | $305,029 | $107,000 | $198,029 |
Show the steps
- Limit: $4,400 = $4,400. You and your employer put in $3,500.
- Tax rate on contributions: 22.00% federal + 4.00% state + 7.65% payroll tax = 33.65%. Saved each year: $3,000 × 33.65% = $1,009.50.
- Monthly flow into the account: ($3,500 − $0) ÷ 12 = $291.67. Monthly return: 6.00% ÷ 12 = 0.5000%.
- Balance after 360 months = balance × (1 + i)^N + monthly flow × ((1 + i)^N − 1) ÷ i = $305,028.70.
Future value of an HSA
FV = B × (1 + i)^N + c × ((1 + i)^N − 1) ÷ i
B = balance, c = monthly net contribution, i = monthly return, N = months
- 2026 limits: $4,400 self-only and $8,750 family, plus $1,000 for age 55 and older. Employer contributions count toward the limit.
- You need a high-deductible health plan to contribute. For 2026 that means a deductible of at least $1,700 (self-only) or $3,400 (family).
- You cannot contribute once you enroll in Medicare. Some states do not give the state tax break. Payroll savings apply only when contributions go through an employer cafeteria plan.
Estimates for planning and learning, not financial, tax, legal or medical advice. Check figures with your lender, tax preparer or doctor before you act.
About this calculator
A health savings account, or HSA, is a tax-advantaged account for medical costs that you can open if you have a high-deductible health plan. It has a triple tax advantage: the money you put in is tax-deductible, it grows without tax, and you pay no tax when you spend it on qualified medical expenses. No other account gives you all three.
This calculator shows how much tax you save each year from contributions, and how large the account could grow if you keep contributing and invest the money. You can also include your employer’s contributions and the medical costs you pay from the account each year. The calculator checks everything against the 2026 limits so you can see how much room you have left.
Many people treat an HSA as a long-term account. If you can pay current medical costs out of pocket, you can leave the HSA invested and let it grow. After age 65 you can also use HSA money for any purpose and pay only ordinary income tax, like a traditional IRA.
How to use it
- Choose self-only or family coverage and enter your age. At 55 or older, the limit rises by $1,000.
- Enter what you contribute each year and what your employer adds. Together they must stay under the limit.
- Enter your current balance, the number of years to grow and your expected return.
- Enter your federal and state tax rates. Leave the payroll box checked if you contribute through your employer, which also saves the 7.65% payroll tax.
- If you pay medical bills from the HSA, open the spending box and enter the yearly amount. Read the balance, the tax saved and the chart.
2026 HSA limits
- Self-only coverage: $4,400.
- Family coverage: $8,750.
- Catch-up at age 55 or older: $1,000 more.
- High-deductible plan minimum deductible: $1,700 self-only, $3,400 family.
- Out-of-pocket maximum: $8,500 self-only, $17,000 family.
The limit includes your employer’s contributions.
Worked example
You are 35 with self-only coverage and a $2,000 HSA balance. You contribute $3,000 a year through payroll and your employer adds $500. At a 22% federal rate, 4% state rate and 7.65% payroll tax, your rate is 33.65%, so your $3,000 saves $1,009.50 in tax each year. If you leave the money invested at 6% for 30 years, the balance grows to about $305,000. Of that, only $107,000 came from contributions; the rest is tax-free growth.
What counts as a qualified medical expense
Doctor and hospital bills, prescriptions, dental and vision care, and many other medical costs qualify. You can reimburse yourself at any time, even years later, as long as the expense happened after you opened the account. Keep your receipts.
Rules to know
- You must be covered by a qualifying high-deductible plan and not be on Medicare to contribute.
- Money you take out for non-medical costs before 65 is taxed and charged a 20% penalty.
- Some states, including California and New Jersey, do not follow the federal tax break.
- HSA money rolls over every year. It is yours even if you change jobs.
Sources
Quick check: test yourself
What is the 2026 HSA limit for family coverage, for someone under 55?
Correct answer: $8,750. The 2026 limits are 4,400 for self-only and 8,750 for family. People 55 and older can add 1,000.
Why is an HSA called a “triple tax advantage” account?
Correct answer: Contributions are tax-deductible, growth is tax-free, and qualified medical withdrawals are tax-free. Money goes in before tax, grows untaxed, and comes out tax-free for qualified medical expenses.
You put in 3,000 a year at a combined 33.65% tax rate. How much tax do you save each year?
Correct answer: $1,009.50. 3,000 × 33.65% = 1,009.50.
Pick an answer for each question.
Common questions
How much can I put in an HSA in 2026?
You can contribute up to $4,400 with self-only coverage or $8,750 with family coverage. If you are 55 or older, you can add $1,000.
Do employer contributions count toward the limit?
Yes. The limit covers everything going in, from you and from your employer.
Can I invest my HSA?
Many HSA providers let you invest the balance in mutual funds once it passes a minimum, such as $1,000 to $2,000. Invested money can grow much faster than cash.
What happens to my HSA if I change jobs?
It stays with you. An HSA is not tied to your employer, and the balance rolls over from year to year.
What happens when I turn 65?
You can still use it tax-free for medical costs. You can also withdraw for any other purpose and pay only income tax, with no penalty. You can no longer contribute once you are on Medicare.
Does an HSA reduce Social Security and Medicare taxes?
Only if contributions go through your employer’s payroll plan. Contributions you make on your own are deductible for income tax but do not reduce payroll tax.
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