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7 Mistakes You're Making with Your HSA When Turning 65 (and How to Fix Them)


Happy Birthday! If you’re blowing out 65 candles this year, you’ve officially hit the "Golden Age" of retirement planning. Between picking out a cake and scouting for the best travel deals, you probably have Medicare on your mind. But if you’ve been diligently tucking money away in a Health Savings Account (HSA) for years, there is a whole new set of rules you need to know.

An HSA is one of the most powerful financial tools in your belt. It’s the only account that offers a "triple tax advantage": your contributions are tax-deductible, the growth is tax-free, and your withdrawals for medical expenses are tax-free. However, once you hit 65, the IRS shifts the goalposts. If you aren't careful, what was once a tax-saving machine can quickly become a headache of penalties and paperwork.

At Solomon Estate and Wealth Planning, I want to make sure your transition into Medicare is as smooth as possible. Let’s dive into the seven most common HSA mistakes people make when turning 65: and, more importantly, how you can fix them before they cost you.

1. The "Six-Month Look-Back" Trap

This is the mistake that catches almost everyone off guard. Most people know that once they enroll in Medicare, they have to stop contributing to their HSA. What they don’t know is that the IRS looks backward.

If you wait until after age 65 to claim your Social Security benefits, your Medicare Part A enrollment is actually backdated up to six months (but not earlier than the month you turned 65). Because you cannot contribute to an HSA while enrolled in Medicare, those six months of "retroactive coverage" can turn your recent HSA contributions into "excess contributions," which are subject to taxes and penalties.

How to fix it: If you plan to apply for Social Security benefits after age 65, stop your HSA contributions at least six months before you apply. If you’ve already over-contributed, you’ll need to work with your HSA provider to withdraw the excess funds and the earnings on those funds before you file your tax return for the year.

Calendar highlighting the 6-month HSA look-back rule for Medicare enrollment at age 65.

2. Contributing While Enrolled in Medicare Part A

A lot of folks decide to keep working past 65 and stay on their employer’s high-deductible health plan (HDHP). They think, "As long as I don't sign up for Medicare Part B, I can keep putting money in my HSA."

Unfortunately, that’s not quite how it works. If you are enrolled in any part of Medicare: including just the premium-free Part A: you are no longer eligible to contribute to an HSA. Many people are automatically enrolled in Part A when they turn 65 if they are already receiving Social Security, or they sign up for it because "it's free." The moment that Part A coverage starts, your HSA contribution limit drops to zero.

How to fix it: Check your Medicare status carefully. If you want to keep contributing to your HSA because you are still working, you may need to delay enrolling in Medicare Part A and Part B. However, be careful! If your company has fewer than 20 employees, you might be required to have Medicare to avoid coverage gaps. If you're feeling overwhelmed, checking out a Medicare enrollment at 65 checklist can help you keep your dates straight.

3. Thinking the HSA is "Useless" After 65

I’ve heard some clients worry that if they don't spend their HSA money by the time they hit 65, they’ll lose it or get hit with a massive bill. This couldn't be further from the truth!

While the rules for putting money in get stricter at 65, the rules for taking money out actually get much more flexible. Before age 65, if you use HSA funds for something non-medical (like a new boat), you pay income tax plus a 20% penalty. After age 65, that 20% penalty disappears.

How to fix it: Treat your HSA like a "Super IRA." If you have a medical expense, use the HSA to pay for it tax-free. If you don't have medical expenses, you can still withdraw the money for anything you want. You’ll just pay regular income tax on it, exactly like you would with a Traditional IRA. This is a great way to bolster your retirement planning.

4. Forgetting You Can Pay Medicare Premiums with Your HSA

Many people don't realize that once they turn 65, they can use their tax-free HSA dollars to pay for their Medicare premiums. This includes premiums for Medicare Part B, Part D (prescription drugs), and Medicare Advantage (Part C).

The only thing you cannot pay for with HSA funds is a Medigap (Medicare Supplement) premium.

How to fix it: If your Medicare premiums are being deducted directly from your Social Security check, you can actually reimburse yourself from your HSA. Just keep the documentation showing the deduction, and move the money from your HSA to your checking account. It’s a great way to lower your out-of-pocket healthcare costs. To understand more about which plan might be right for you, read up on understanding Medicare solutions.

Digital wallet and healthcare icons showing how to use HSA funds for Medicare premiums.

5. Draining the Account Too Quickly

When people hit retirement, they often start spending their HSA money on every co-pay and prescription they encounter. While that’s what the money is there for, it’s often smarter to let it grow.

According to research, a retired couple at age 65 might need upwards of $300,000 to cover healthcare costs throughout retirement. If you spend your HSA funds on small things now while you still have other income, you miss out on the potential for that money to stay invested and grow.

How to fix it: If you can afford to pay for current medical expenses out-of-pocket using your regular income, do it! Let the HSA balance stay invested in the market. This allows the funds to grow tax-free for several more years, providing a much larger "medical nest egg" for when you really need it in your 70s or 80s. Utilizing smart retirement savings strategies like this can make a massive difference in your long-term security.

6. Not Investing the Balance

Speaking of growth: did you know that most people leave their HSA funds sitting in a basic savings account earning 0.01% interest?

At 65, you might still have 20 or 30 years of retirement ahead of you. If you have a significant balance in your HSA, keeping it all in cash is a missed opportunity. Most HSA providers allow you to invest your balance in mutual funds or ETFs once you hit a certain minimum (usually $1,000).

How to fix it: Review your HSA investment options. If your current provider doesn't offer good investment choices, you can actually roll your HSA over to a different provider that does. This is a key part of retirement planning and securing your future.

7. Losing Your Receipts (The Paperwork Penalty)

The IRS allows you to reimburse yourself for a medical expense years after it happened, as long as the expense occurred after you opened the HSA. This means you could pay for a surgery today out-of-pocket, let your HSA money grow for ten years, and then "reimburse" yourself tax-free in 2036.

But there’s a catch: you need the receipt. If you get audited and can't prove that the $5,000 withdrawal you made was for a legitimate medical expense from a decade ago, you’ll be in hot water.

How to fix it: Get digital. Scan your receipts and save them in a dedicated folder on your computer or a cloud drive (like Google Drive or Dropbox). Back them up! Having a digital "shoebox" of receipts ensures that you can always justify your tax-free withdrawals to the IRS.

Scanning medical receipts to save digital records for tax-free HSA withdrawals in retirement.

Bottom Line: Your HSA is a Retirement Secret Weapon

Turning 65 doesn't mean the end of your HSA journey; it just means the rules have changed. By avoiding the 6-month look-back trap and knowing exactly how to use your funds for Medicare premiums, you can save thousands of dollars in taxes and penalties.

The transition to Medicare and retirement can be a bit like a puzzle. If you want to make sure all your pieces fit together: from your HSA to your 401(k) and your estate plan: I’m here to help.

Don’t leave your retirement to chance. Let’s sit down and look at your specific situation to ensure you’re making the most of every dollar you’ve worked so hard to save.

Ready to get your plan in place?Book a retirement planning session with me today.

Solomon Estate and Wealth Planning

 
 
 

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