Tax Strategy
HSA — The Best Account Nobody Talks About
Triple tax advantage. No expiration. After 65 it works like a 401k. And most people leave it as a spending account.
The Speedrun Take
The HSA is the only account in the tax code with three tax advantages: contributions are pre-tax, growth is tax-free, and withdrawals for medical expenses are tax-free. It outranks the Roth IRA in the investment order of operations — if you have an eligible health plan. The mistake: using it as a medical debit card instead of an investment account.
The Triple Advantage
No other account in the U.S. tax code offers all three of these at once.
Pre-Tax Contributions
Money goes in before federal, state, and payroll taxes. If you're in the 22% bracket, $1 in costs you $0.78 out of pocket.
Tax-Free Growth
Invested HSA dollars compound with zero tax drag. Same as a Roth IRA.
Tax-Free Withdrawals
For qualified medical expenses. No income tax, ever.
Bonus: The 65+ escape hatch
After age 65, you can withdraw for anything penalty-free — taxed as ordinary income, just like a Traditional IRA. So worst case, your HSA becomes a second 401k. Best case, every dollar comes out tax-free for medical expenses.
Who Qualifies
Requirement: You must be enrolled in a High Deductible Health Plan (HDHP) as defined by the IRS.
2024 HDHP minimums
- →$1,600 minimum deductible (single)
- →$3,200 minimum deductible (family)
2024 HSA contribution limits
- →$4,150 (single)
- →$8,300 (family)
- →+$1,000 catch-up if age 55+
Disqualifiers
- ✗Enrolled in Medicare
- ✗Listed as a dependent on someone else's tax return
- ✗Enrolled in a non-HDHP plan through a spouse (even if your own plan is an HDHP)
HSA vs FSA
They sound similar. They are not. One is an investment account; the other is a prepaid medical debit card.
| Feature | HSA | FSA |
|---|---|---|
| Rollover | Unlimited — balance rolls over every year | "Use it or lose it" (with $640 grace, 2024) |
| Investment | Yes — invest in index funds | No |
| Tied to employer | No — yours forever, portable | Yes — often lost when you leave |
| Contribution limit | $4,150 / $8,300 | $3,200 (2024) |
| Eligibility | HDHP required | Any health plan |
Verdict:HSA wins if you have the option. FSA is better than nothing for predictable medical spend — but it doesn't build long-term wealth.
The HSA Investment Strategy
Most people use an HSA as a medical expense debit card. This is a mistake. The optimal strategy is called Pay and Delay.
Open HSA, invest contributions in index funds
Most HSA providers offer investment options — look for Fidelity HSA, Lively, or HealthEquity with Vanguard funds.
Pay all current medical expenses out of pocket
Use your regular checking account for every medical bill. The HSA stays invested.
Save ALL your receipts
Physical or digital — it doesn't matter. There is no time limit on reimbursement. A receipt from 10 years ago is still valid.
Let the HSA compound for years or decades tax-free
Treat the HSA as untouchable investment money. It's growing tax-free the entire time.
At retirement, submit old receipts and reimburse yourself
Medical expenses from any year you had an HSA are eligible — even if you reimburse 20 years later. Tax-free withdrawal.
Key insight: Medical expenses from any year you had an HSA are eligible for reimbursement — even if you submit the receipt 20 years later. There is no IRS time limit. This turns old receipts into tax-free cash in retirement.
The Math
$4,150/year invested in an HSA for 20 years at 8% growth
HSA balance after 20 years
~$190,000
Withdrawn for medical expenses (tax-free)
$190,000 — you keep 100%
Withdrawn after 65 for non-medical (taxed as income)
Same as a Traditional IRA — still excellent
Same amount in a taxable account
~$160,000 after 15–20% capital gains tax on gains
HSA advantage
$30,000+ better than taxable
Where to Open an HSA
Best for Investing: Fidelity HSA
No fees. Excellent fund selection including FZROX (0% expense ratio). The clear top choice for anyone optimizing for long-term growth.
Good Alternative: Lively
No fees. Invests via TD Ameritrade/Schwab. Solid option if you prefer the interface.
Avoid: Insurance company HSA accounts
Many employer-provided HSAs from insurance carriers charge high monthly fees and offer no investment option — your money just sits in cash losing to inflation.
Pro tip:If your employer's HSA has high fees, contribute just enough to capture any employer HSA contribution, then do an annual HSA rollover to Fidelity. The IRS allows one rollover per year with no taxes or penalties.
Fidelity HSA
No fees, FZROX at 0.00% expense ratio, and the top pick for investing your HSA long-term.
Step by Step
From HDHP confirmation to full HSA investment mode in six steps.
Verify you're on an HDHP
Check your health insurance card or benefits portal. The plan must meet IRS minimum deductible thresholds.
Open a Fidelity HSA
Or use your employer HSA if it has good investment options. Fidelity has no fees and excellent fund selection.
Contribute monthly — max it out if you can
$4,150 single / $8,300 family for 2024. Add $1,000 if you're 55 or older.
Invest contributions immediately
Buy FZROX or FSKAX right after each deposit. Don't let cash sit idle.
Pay medical bills out of pocket
Save every receipt — physical or digital. No time limit on reimbursement.
Let it compound
Treat the HSA as untouchable investment money. Future you will thank current you.
Start Investing Your HSA
Open a Fidelity HSA — No Fees, FZROX at 0%
Fidelity offers the best HSA for investors: zero account fees, FZROX at 0% expense ratio, and a clean interface. The same quality as their Roth IRA, purpose-built for health savings.