HSA Future Value Calculator: Projected Value of an Invested HSA Balance
Project what an invested HSA balance could grow to — tax-free — if left to compound rather than spent on current medical costs. The HSA's triple tax advantage makes it the most powerful retirement account most people underuse.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Projected HSA value | Total tax-free growth |
|---|---|---|
| $20k · 7% · 20yr | $77,393.69 | $57,393.69 |
| $10k · 7% · 30yr | $76,122.55 | $66,122.55 |
| $50k · 6% · 15yr | $119,827.91 | $69,827.91 |
| $5k · 8% · 25yr (young saver) | $34,242.38 | $29,242.38 |
How This Calculator Works
Enter your current invested HSA balance, the annual return you expect, and the years you'll leave it invested. The calculator compounds the balance annually at that rate and shows the projected value and the tax-free growth. This models a lump sum; ongoing contributions would push the figure higher.
The Formula
Future Value of a Lump Sum
PV = present value, r = annual rate, n = number of years
Worked Example
A $20,000 invested HSA balance compounded at 7% for 20 years projects to about $77,394 — $57,394 of completely tax-free growth, provided the withdrawals are used for qualified medical expenses (and in retirement, nearly everyone has them). No other account offers tax-free contributions, tax-free growth, AND tax-free withdrawals.
Key Insight
The HSA is the only triple-tax-advantaged account: contributions are pre-tax, growth is untaxed, and qualified medical withdrawals are tax-free. The optimization most people miss: pay current medical costs out of pocket, save the receipts, and let the HSA balance grow invested for decades. You can reimburse yourself tax-free for those old medical expenses at any future point. After age 65, non-medical withdrawals are taxed like a traditional IRA (no penalty) — making a maxed, invested HSA effectively a supercharged retirement account.
Frequently Asked Questions
How is the HSA future value calculated?
Today's invested balance × (1 + annual return) ^ years. A $20,000 balance at 7% for 20 years projects to about $77,394, all of it growing tax-free.
What makes the HSA triple-tax-advantaged?
Contributions are pre-tax (or deductible), investment growth is never taxed, and qualified medical withdrawals are tax-free. No other account combines all three. Traditional 401(k)/IRA tax the withdrawals; Roth taxes the contributions; HSA taxes neither for medical use.
Should I invest my HSA or keep it in cash?
If you can pay current medical costs out of pocket, invest the HSA and let it compound for decades — that's where the power is. Keep a small cash buffer for near-term medical needs; invest the rest. Many HSA providers require a minimum cash balance before allowing investing.
What if I never have enough medical expenses?
Two safety valves. First, save all medical receipts — you can reimburse yourself tax-free for past expenses at any future point, no time limit. Second, after age 65, non-medical withdrawals are taxed like a traditional IRA (income tax, no penalty) — so a maxed HSA functions as a retirement account even beyond medical use.
Who can contribute to an HSA?
Anyone enrolled in a qualifying High Deductible Health Plan (HDHP) with no other disqualifying coverage. Annual contribution limits apply (around $4,150 individual / $8,300 family in 2024, plus a $1,000 catch-up for 55+). The HDHP requirement is the main barrier — not everyone has access.
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Data Sources & Benchmarks
This calculator draws on 1 independent, dated source. The starting values for expected annual return are taken from the benchmarks below and refresh whenever the snapshots are updated.
Methodology & Review
Future value compounds today's invested HSA balance annually at a fixed expected return. The model assumes the balance stays invested (not spent on current medical costs) and that growth is never taxed — the HSA's defining advantage. Ongoing contributions are not modeled; for contribution projections use a contribution-based HSA calculator.
Written by Ugo Candido · Last updated May 17, 2026.