Your Financial Advisor Probably Left This Out
Ask anyone about retirement accounts and you will hear the same two names: 401(k) and Roth IRA. Maybe a traditional IRA if they are feeling thorough.
But there is a third account that quietly outperforms both of them in specific situations. Most financial advisors barely mention it. Your Health Savings Account is a retirement account. Start treating it like one.
The Retirement Problem No One Plans For
Here is a number that should change how you think about retirement: $315,000. That is Fidelity's latest estimate for what the average retired couple will spend on healthcare. Medicare does not cover everything. Supplemental premiums, prescription drugs, dental work, vision care, hearing aids, long-term care. These costs stack up for decades.
Most people plan to cover this with Social Security or general savings. Both get taxed. HSA withdrawals for medical expenses do not.
Why the HSA Outperforms for Healthcare Dollars
Think about the path a dollar takes through each account when you need it for a medical bill in retirement.
401(k) dollar: You contributed pre-tax. It grew tax-deferred. You withdraw it and pay income tax at your retirement rate. If you are in the 22% bracket, your $1 of medical spending actually costs $1.28 of 401(k) money.
Roth IRA dollar: You contributed after-tax (you already paid up front). It grew and withdraws tax-free. But you needed to earn $1.28 to contribute that $1 in the first place.
HSA dollar: You contributed pre-tax. It grew tax-free. You withdrew tax-free for medical expenses. Your $1 of spending costs exactly $1. No tax at any point.
Dollar for dollar, no other account matches this efficiency for healthcare spending.
The After-65 Flexibility Play
Here is where the HSA earns its spot in every retirement plan. After age 65, you can withdraw HSA funds for any purpose. Non-medical withdrawals after 65 are taxed as ordinary income, just like a 401(k).
This means your HSA is never locked in. If you stay healthy and do not need the money for medical bills, it works exactly like a traditional retirement account. If you do need it for healthcare (and the odds say you will), it is completely tax-free.
You win either way. Compare that to a 401(k), which is always taxed on withdrawal. Or a Roth IRA, which required you to pay taxes up front. The HSA gives you optionality that neither can match.
The Strategy
The play is straightforward:
- ●Max out your HSA every year ($4,400 individual, $8,750 family for 2026)
- ●Invest the balance in low-cost index funds
- ●Pay current medical expenses out of pocket when you can
- ●Let the account compound for decades
- ●Use it for healthcare costs in retirement, tax-free
Do this from age 30 to 65, and at 7% annual returns, your HSA contributions alone grow to over $600,000. That is enough to cover Fidelity's $315,000 estimate with room to spare.
The Biggest Mistake: Treating It Like a Checking Account
The average HSA balance in America is under $4,000. Most people deposit money, spend it on this year's bills, and never let it grow. They are using a wealth-building tool as a spending account.
You would not pull from your 401(k) every time you had an expense. Stop doing it with your HSA.
The accounts that build wealth are the ones you fund consistently and leave alone. Your HSA should be no different. Stop calling it a savings account. It is a 40-year wealth plan.