myUSFinance

1. Enter your Coverage Type — This value represents your coverage type
2. Enter your Annual HSA Contribution ($) — This value represents your annual hsa contribution
3. Enter your Your Age — This value represents your your age
4. Enter your Your Marginal Tax Rate (%) — This value represents your your marginal tax rate
5. Enter your Current HSA Balance ($) — This value represents your current hsa balance
6. Enter your Expected Annual Return (%) — This value represents your expected annual return
7. Enter your Years Until Retirement — This value represents your years until retirement
8. Enter your Estimated Annual Healthcare Expenses ($) — This value represents your estimated annual healthcare expenses
9. Click Calculate — Review your results in the output section below the form. The calculator instantly computes all values based on your inputs.
10. Adjust and Compare — Modify any input to see how changes affect the result. Try different scenarios to find the optimal approach for your situation.

All calculations are performed instantly in your browser. Your data is never sent to any server or stored anywhere — your financial information remains completely private.

Where:

• Contribution — Annual HSA contribution ($4,150 individual, $8,300 family limit in 2024)
• Marginal Tax Rate — Your combined federal + state tax rate on the last dollar of income
• r — Annual investment return rate (if HSA funds are invested)
• n — Number of years until withdrawal

Worked Example

Contributing $4,150/year in the 24% federal + 5% state bracket: Annual tax savings = $4,150 × 0.29 = $1,204. Plus 7.65% FICA savings = $317. Total tax savings: $1,521/year. If invested at 7% for 20 years: $4,150/year grows to approximately $183,000 tax-free.

Limitations and Assumptions

HSAs offer a triple tax advantage: contributions are tax-deductible, growth is tax-free, and withdrawals for qualified medical expenses are tax-free. After age 65, HSA withdrawals for any purpose are penalty-free (taxed as income if not for medical expenses, similar to a traditional IRA). HSAs are often considered the best tax-advantaged account available.

Let's see the power of consistent saving in action.

Scenario: Emma is 28 years old and wants to build long-term wealth. She has $5,000 in savings and can contribute $400 per month. She expects a 7% average annual return through a diversified index fund portfolio.

• Initial balance: $5,000
• Monthly contribution: $400
• Annual return: 7%
• Time horizon: 37 years (to age 65)

Results:

• Future value: $897,523
• Total contributions: $182,600 ($5,000 + $400 × 444 months)
• Interest earned: $714,923

Remarkably, 80% of Emma's final balance comes from investment returns, not her own contributions. If she waits just 5 years to start (beginning at 33 instead of 28), her future value drops to $610,387 — a difference of $287,136 from delaying five years. This demonstrates why starting early is the single most powerful wealth-building strategy.