Using HSAs to Prepare for Health Costs in Retirement

Many retirees are caught off guard not by extravagant spending, but by the mounting healthcare costs that come with living longer. Preparing for these expenses is crucial, and the right approach can dramatically impact financial security in retirement.

Healthcare.

Healthcare costs don’t hit all at once. They build up—slowly, almost invisibly—through prescriptions, doctor visits, insurance premiums, and the simple fact of getting older. In fact, experts estimate that a 65-year-old couple retiring today may need several hundred thousand dollars just to cover healthcare for the rest of their lives.

Yet there is a tool—often overlooked, frequently misunderstood—that was designed, almost perfectly, for this exact challenge.

The Health Savings Account is available only to individuals who are enrolled in a qualifying high-deductible health plan (HDHP).

But many people miss out on its full potential—often because of how they use their HSAs from the start.

The Common Mistake: Treating an HSA Like a Checking Account

For many people, an HSA is just a pass-through account: money goes in, medical bills get paid, and the balance never really grows.

That approach appears practical—even responsible.

This perspective, however, overlooks the larger opportunity presented by HSAs.

An HSA might be the most tax-friendly investment account available today, not just for healthcare expenses.

• Contributions are tax-deductible
• Growth is tax-deferred
• Withdrawals for qualified medical expenses are tax-free.

That’s a unique combination. In fact, when applied wisely, an HSA can be even more powerful than a traditional or Roth IRA.

The question is not whether to use an HSA.

So the real question becomes: how do you make the most of it?

Reframing the HSA: From Expense Tool to Investment Strategy

Imagine two individuals.

The first contributes to an HSA and uses it each year to pay for routine medical expenses—doctor visits, prescriptions, and minor procedures.

The second contributes the same amount—but pays those same expenses out of pocket, allowing the HSA balance to remain untouched and invested.

Over time, the difference compounds.

The second individual is more than saving—they are building a dedicated, tax-free pool of capital specifically for one of retirement’s largest and most uncertain expenses.

At this point, your HSA starts appearing less like a checking account and more like a personal healthcare fund for your future.

The Long-Term Advantage: Compounding in a Tax-Free Environment

When HSA balances are invested—typically in mutual funds or ETFs within the account—they can grow meaningfully over time.

Consider the dynamics:

• Annual contributions accumulate
• Investment returns compound
• No taxes erode growth.
• Future withdrawals for medical expenses remain tax-free.

For investors who are already maximizing contributions to 401(k)s and IRAs, the HSA can serve as an additional layer of tax-efficient growth.

The true advantages of this approach often become clear in retirement itself.

Retirement Reality: Healthcare as a Major Line Item

Medicare does not eliminate healthcare costs—it restructures them.

You’ll still have to pay for premiums, deductibles, supplemental insurance, dental and vision care, and possibly long-term care. And to make things trickier, healthcare costs usually rise faster than other expenses.

This is where a well-funded HSA becomes more than helpful—it becomes strategic.

HSA funds can be used for:

• Medicare premiums (excluding Medigap in some cases)
• Long-term care premiums (within limits)
• Prescription drugs
• Out-of-pocket medical expenses

In other words, retirees can use money that has grown tax-free for years to pay for healthcare costs—saving even more in the long run.

That changes the math.

A Little-Known Benefit: Reimbursement Flexibility

Another feature of HSAs is often overlooked—and it may be one of the most powerful.

If you pay for medical expenses out-of-pocket today, you can reimburse yourself years—even decades—later, as long as you have kept adequate documentation and the expense was incurred after the HSA was established.

This creates optionality.

An investor could:

• Pay medical expenses out-of-pocket during working years.
• Allow the HSA to grow untouched.
• Reimburse themselves later in retirement—effectively creating a tax-free income stream.

It’s about flexibility and harnessing smart tax advantages together.

When to Use the Strategy

This approach is not for everyone. You must be enrolled in a qualifying high-deductible health plan (HDHP) to open and contribute to an HSA.

It tends to work best for individuals who:

• Have sufficient cash flow to cover current medical expenses out-of-pocket.
• They are already making important contributions to their retirement accounts.
• Have a long-term investment horizon.
• Are comfortable managing documentation for future reimbursement

For them, an HSA is about gaining control and confidence for the future.

The Strategic Role of the HSA in a Wider Plan

In an organized financial plan, different accounts serve different purposes:

• 401(k)/IRA: Income replacement
• Taxable accounts: Flexibility and liquidity
• Roth accounts: Tax diversification.
• HSA: Healthcare funding

When viewed this way, the HSA fills a very specific—and increasingly important—role.

It isolates healthcare risk.

And by doing that, it helps protect the rest of your retirement savings from being eaten away by healthcare costs.

The Bottom Line

The HSA is not new.

But the way investors think about it is evolving.

Used conventionally, it is a helpful tool.

Used strategically, an HSA becomes a long-term, tax-smart way to address major retirement expenses.

The real difference lies in using an HSA to invest in your health and future, not just to pay bills.

Sources

• IRS – Health Savings Accounts (HSAs): https://www.irs.gov/publications/p969
• Fidelity – Retiree Health Care Cost Estimate: https://www.fidelity.com/viewpoints/personal-finance/plan-for-rising-health-care-costs
• Employee Benefit Research Institute (EBRI): https://www.ebri.org
• HSA Bank – HSA Investment Overview: https://www.hsabank.com
• Morningstar – How to Use an HSA as a Retirement Tool: https://www.morningstar.com

Disclosure

Gary W. Lendermon is the Founder of Lendermon Consulting and a Professor at Christian Brothers University. He previously held FINRA Series 7 and 63 licenses. This article is for informational purposes only and should not be considered personalized investment, tax, or legal advice. Individuals should consult with a qualified financial professional before making decisions regarding their specific situation.

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