HSA FIRE Strategy Calculator
Calculate the triple tax advantage of Health Savings Accounts for your FIRE strategy and compare HSA vs. Roth vs. Taxable growth.
Individual: $4,300 limit. Family: $8,550 limit (2025).
CA and NJ do not recognize HSA tax benefits at the state level.
Projected HSA Balance at Retirement
$271,971
at age 55
Annual Tax Savings
$1,576
Federal + State + FICA
Total Tax Savings
$39,399
Over 25 years
Lifetime Receipt Reimbursement
$50,000
Tax-free withdrawals via saved receipts
Years of Growth
25
Tax-free compounding
How to Use This Calculator
Select your coverage type (individual or family) and enter your annual HSA contribution. Add your current HSA balance and typical annual medical expenses you pay out-of-pocket. The calculator projects your HSA balance at retirement, shows annual and lifetime tax savings, and compares HSA growth against Roth and taxable alternatives.
What Is the HSA FIRE Strategy?
The HSA FIRE strategy treats your Health Savings Account as a long-term investment vehicle rather than a short-term medical spending account. Instead of using HSA funds to pay current medical bills, you pay those expenses out-of-pocket, save your receipts, and let the HSA balance grow tax-free for decades.
At any point in the future — there is no time limit — you can reimburse yourself tax-free for those past medical expenses. This effectively creates a tax-free withdrawal mechanism on top of tax-free growth, making the HSA the most tax-efficient account available.
The Triple Tax Advantage
The HSA is the only account that offers all three tax benefits simultaneously:
- Tax-deductible contributions: HSA contributions reduce your federal income tax, and in most states, your state income tax. If contributed via payroll deduction, they also avoid FICA taxes (7.65%).
- Tax-free growth: Investments inside the HSA grow without any annual tax drag from dividends or capital gains distributions.
- Tax-free withdrawals: Withdrawals for qualified medical expenses are completely tax-free, including reimbursements for expenses from prior years.
By contrast, a Roth IRA offers only tax-free growth and withdrawals (no upfront deduction), and a taxable account offers none of these benefits.
Note for California and New Jersey Residents
California and New Jersey do not recognize HSA tax benefits at the state level. In these states, your HSA contributions are subject to state income tax, and any investment gains inside the HSA are also taxable at the state level. The federal tax benefits still apply, so HSAs are still advantageous — just slightly less so. Uncheck the "State allows HSA deduction" checkbox to see the adjusted tax savings.
Frequently Asked Questions
What is the HSA triple tax advantage?
HSAs offer tax-deductible contributions, tax-free investment growth, and tax-free withdrawals for qualified medical expenses. No other account provides all three benefits.
How does the receipt reimbursement strategy work?
Pay medical expenses out-of-pocket and save receipts. There is no time limit on reimbursement, so you can let your HSA grow for years and reimburse yourself later tax-free.
What are the 2025 HSA contribution limits?
$4,300 for individual coverage, $8,550 for family coverage. An additional $1,000 catch-up contribution is available for those age 55 and older.
Do CA and NJ residents benefit from HSAs?
Yes, but less so. These states do not recognize HSA tax benefits at the state level. Federal deductions and tax-free growth still apply.
What happens to my HSA after age 65?
After 65, you can withdraw for any purpose without penalty (taxed as income for non-medical use). Medical withdrawals remain completely tax-free.
Related Calculators
Methodology & Assumptions
Uses 2025 IRS HSA contribution limits. Tax savings include federal income tax at your marginal rate, FICA taxes (7.65%), and state income tax (assumed 5% if your state allows HSA deductions). The Roth equivalent adjusts contribution amounts for the upfront tax cost. The taxable equivalent applies 0.5% annual tax drag and 15% LTCG tax on gains at withdrawal.
This tool provides estimates for educational purposes. It is not financial advice. Consult a fee-only financial planner for your specific situation.