What is an HSA and why is it the best retirement account?
A Health Savings Account (HSA) is the only triple-tax-advantaged account: contributions are pre-tax (like 401k), growth is tax-free (like Roth), and withdrawals for medical expenses are tax-free. After age 65, HSA funds can be used for anything (taxed like a Traditional IRA). The 2024 limit is $4,150 single / $8,300 family.
Formula
HSA Value at Retirement = Annual Contribution × FV factor (e.g., $4,150/yr × 35 years at 7% = $578k)
Example
Age 30, family HDHP. Contribute $8,300/year for 30 years at 7%. HSA balance at 60: $830,000 — all tax-free for medical expenses, or taxed at regular rates for non-medical use after 65.
How it works in detail
The HSA strategy for wealth building: (1) Max out contributions every year, (2) Pay medical expenses out-of-pocket now (don't reimburse from HSA), (3) Save receipts indefinitely, (4) Let HSA invest and compound for decades, (5) In retirement, reimburse yourself for all those past medical expenses tax-free, OR use after 65 like a Traditional IRA. This gives you decades of tax-free growth. A 30-year-old contributing $4,150/year for 35 years at 7% → $578,000 in tax-free medical money. Requirements: must be enrolled in a High Deductible Health Plan (HDHP). No income limits, no phase-outs, contributions reduce your taxable income.
See how maxing your HSA accelerates your retirement plan
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Should I choose Roth or Traditional IRA?
Choose Roth if you expect higher taxes in retirement (younger, income will grow, or tax rates rise). Choose Traditional if you're in a high bracket now and expect lower taxes later. For most accumulating workers under 50 in the 22–24% bracket, Roth is preferred because of tax-free growth and no Required Minimum Distributions.
How much should I contribute to my 401(k)?
At minimum, contribute enough to get your full employer match (free money — typically 3–6% of salary). Ideally, contribute 15–20% of gross income to retirement accounts total (401k + IRA). The 2024 401(k) limit is $23,500 ($31,000 if you're 50+).
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