The HSA triple tax break: not use-it-or-lose-it

HSA vs FSA: the confusion that costs money

A Flexible Spending Account (FSA) is use-it-or-lose-it — unspent money mostly vanishes at year-end. A Health Savings Account (HSA) is the opposite: every dollar rolls over, the account is yours (not your employer's), and it travels with you when you change jobs or health plans. Nothing expires, ever. Confusing the two is why people under-fund the better account.

The triple tax advantage

No other account does all three. 1) Going in: contributions are tax-deductible (or pre-tax through payroll, which also skips FICA). 2) While invested: growth and earnings are completely tax-free. 3) Coming out: withdrawals for qualified medical expenses are tax-free too. Untaxed at every stage — a 401(k) or IRA only gets you two of the three.

The 2026 limits

For 2026 you can put in $4,400 (self-only HDHP coverage) or $8,750 (family), plus a $1,000 catch-up at age 55+. You need a qualifying High Deductible Health Plan (2026: deductible ≥ $1,700 self / $3,400 family). If you weren't covered all year, the limit is generally prorated by your months of coverage. Go over and the excess draws a 6% excise tax every year until you pull it out — so know your number.

The stealth retirement account

Here's the move sophisticated savers use: contribute the max, pay current medical bills out of pocket, and let the HSA invest and grow untouched for decades. Save your receipts — you can reimburse yourself tax-free any time, even years later. After 65, non-medical withdrawals are allowed too (taxed as ordinary income, like a traditional IRA, but with no penalty), while medical withdrawals stay tax-free. It's a retirement account with a health-cost superpower.

One catch: Medicare

Once you enroll in Medicare, you can no longer contribute (you can still spend the balance). That's why many people front-load their HSA in the years right before 65 — and why starting early compounds so well.