If you have access to a Health Savings Account (HSA) and you’re using it the way most people do — funding it just enough to cover current-year medical bills — you’re missing the most tax-favored retirement vehicle available in the U.S. tax code.
The HSA is the only account that gets three layers of tax exemption:
- Contributions are deductible (or pre-tax through payroll).
- Growth is tax-free while in the account.
- Withdrawals for qualified medical expenses are tax-free — even decades after the contribution.
There is no other account with that combination. Not the 401(k). Not the IRA. Not the Roth. Only the HSA.
The “spend it now” trap
Most HSA marketing describes it as a way to pay deductibles and current medical bills with pre-tax dollars. That’s the surface-level use.
The much more powerful play: pay current medical bills out of pocket (from your taxable savings), let the HSA grow untouched for 20+ years, and use the accumulated balance as tax-free retirement spending money.
By the time you retire, you’ll have spent the medical bills you’d have spent anyway, and you’ll have an HSA balance of $200K–$500K that you can withdraw entirely tax-free for healthcare expenses in retirement (which are typically substantial — Fidelity estimates $165,000+ per person over retirement).
Or — and this is the surprising part — you can keep receipts.
The receipts trick
Qualified medical expenses paid out of pocket can be reimbursed from the HSA at any time in the future. There’s no statute of limitations.
The implication: every medical bill you pay out of pocket today, save the receipt. In 30 years, when you want to take a tax-free distribution from the HSA, you can reimburse yourself for those decades-old medical bills — completely tax-free.
You’ve effectively turned the HSA into a long-horizon Roth IRA for that portion of the contributions. The HSA grew tax-free for 30 years, the withdrawal is tax-free, and you can spend the money on anything — because the receipts are unrelated to current spending.
Required: keep the receipts (digital scans are fine), and confirm each was a qualified medical expense in the year incurred.
The contribution limits
For 2025:
- $4,300 annual contribution for self-only HDHP coverage
- $8,550 for family HDHP coverage
- +$1,000 catch-up if 55 or older
- +$1,000 for spouse 55 or older if separate spousal HSA
Modest annually. Compound over 30 years at 7%, the family-coverage version becomes ~$880,000.
Eligibility — the key constraint
HSAs require you to be enrolled in a qualified high-deductible health plan (HDHP) with no other disqualifying coverage:
- No FSA (other than a limited-purpose FSA for dental/vision)
- No traditional health insurance from a spouse’s plan
- No Medicare enrollment (a hard cutoff at 65)
- No VA medical benefits used in the last 3 months (with limited exceptions)
For two-earner households, this can require coordinating which spouse’s health plan to use. Often the right structure is one spouse on an HDHP (with the HSA) and the other on traditional coverage, depending on the math.
The two-bucket strategy
For working-age households eligible for an HSA:
- Max out the HSA contribution every year. Through payroll if available (avoids FICA tax too); otherwise direct contribution at tax time.
- Pay current medical bills out of pocket from your taxable savings. Save every receipt.
- Invest the HSA aggressively — equity-heavy, low-cost ETFs. This is a retirement account, not a checking account. Most HSA custodians offer investment options once your balance exceeds $1,000–$2,000.
- Re-evaluate at age 65. Once on Medicare, contributions stop. The HSA continues to grow and remain available for tax-free medical reimbursement (including Medicare premiums).
The estate consideration
HSAs have an estate planning quirk: they don’t get a step-up in basis at death, and a non-spouse heir who inherits an HSA pays ordinary income tax on the entire balance in the year of inheritance.
For HNW households, that means HSAs should generally be spent during life rather than left for heirs. The strategy: in the early retirement years, deliberately reimburse yourself for accumulated medical receipts and use the HSA balance for retirement spending. Don’t let it become a tax bomb for non-spouse heirs.
A spouse can inherit an HSA tax-free and continue using it.
The Wilco recommendation
For pilots, executives, and other HNW clients with HDHP eligibility, the HSA is always the second-most-favored savings dollar after 401(k) match — and arguably first if your employer doesn’t match.
Yet the typical HSA balance at retirement, per the Employee Benefit Research Institute, is around $14,000. The tool is there. Most people don’t use it.
If you have HDHP eligibility and aren’t maxing your HSA — or you’re using it as a checking account for medical bills — we should talk about restructuring.
General educational information. HSA eligibility and qualified medical expense rules are complex; verify with the IRS Publication 969 and a tax professional for your situation.
