HSA After 65: What Changes When You Enroll in Medicare

Short answer: turning 65 doesn't take your HSA money away — it changes what you can put in, not what you can spend. Once you enroll in any part of Medicare, your HSA contributions have to stop. But the balance you already built stays yours forever, it still comes out tax-free for qualified medical expenses, and after 65 the 20% penalty for non-medical withdrawals goes away.

If you've been sitting on an HSA balance and wondering whether you're about to lose it, take a breath. You're not. The rules just shift, and most of the shift is in your favor.

What happens to my HSA when I turn 65?

Three things change, and only one of them is a restriction.

• You can still spend it tax-free on qualified medical expenses. That doesn't expire, ever. HSA dollars roll over year after year with no deadline.
• Non-medical withdrawals get cheaper. Before 65, taking money out for something unrelated to health care means income tax plus a 20% additional tax. At 65, that 20% penalty disappears. You still owe ordinary income tax, so it behaves a lot like a traditional IRA at that point.
• Medicare enrollment stops new contributions. This is the one that catches people. It's covered in detail below.

Age 65 by itself doesn't end your ability to contribute. Medicare does. If you're 65, still working, still on a qualifying high-deductible health plan, and you've delayed Medicare, you can generally keep contributing — including the extra $1,000 catch-up amount that people 55 and older are allowed.

Can I contribute to an HSA once I'm on Medicare?

No. Starting with the first month you're enrolled in Medicare — any part, including premium-free Part A — your HSA contribution limit drops to zero. The IRS spells this out in Publication 969.

There's a trap here worth knowing about. If you delay Medicare past 65 and then apply for Social Security retirement benefits, Social Security enrolls you in Part A automatically, and that enrollment can be backdated up to six months (never earlier than the month you turned 65). Any HSA contributions you or your employer made during those retroactive months become excess contributions, which carry their own annual penalty until you fix them.

The practical takeaway: if you're approaching 65 and plan to keep funding an HSA, talk to your benefits administrator before you file for Social Security, and stop contributions in time to cover that six-month lookback.

What can I actually spend HSA money on after 65?

Everything that counted as a qualified medical expense before, plus a few things that only open up at 65.

• Medicare premiums. Part B, Part D, and Medicare Advantage (Part C) premiums can be paid tax-free from an HSA once you're 65 or older. Medigap/supplemental policy premiums are not qualified.
• Standard out-of-pocket care — deductibles, copays, dental, vision, hearing aids, prescriptions.
• Eligible wellness and therapy devices, which is where a lot of people find real value once premiums are covered.

Red light therapy devices fall in that last group. They're generally eligible with a Letter of Medical Necessity, and we walk through exactly how that works — including how to pay at checkout — in our guide on paying with your FSA or HSA card.

Why do people spend HSA funds on red light therapy?

Because the things that tend to bother us in our 60s and 70s — stiff knees, an aching low back, feet that complain after a walk — are exactly what at-home light therapy is most often studied for.

Red light therapy (researchers call it photobiomodulation) uses red and near-infrared wavelengths, roughly 600–1000nm, that are absorbed by cells and appear to support mitochondrial activity and dampen inflammatory signaling. It's a wellness tool, not a cure, and it works best alongside the rest of your care — movement, physical therapy, whatever your doctor has you doing.

The knee is the best-studied joint. A published review on current advances in photobiomodulation for knee osteoarthritis summarizes the growing body of work there, and a double-blinded randomized controlled trial looked at whether low-level laser therapy added to strength and function outcomes in people with knee OA. A broader umbrella review of randomized trials looked across many health outcomes at once and found the evidence stronger in some areas than others. Results in these trials vary by dose, device and body site — which is a polite way of saying it helps some people meaningfully and others barely at all.

Which device makes sense if I'm spending down an HSA?

Match the device to where it hurts, not to the price tag.

• One or two problem joints (knee, low back, shoulder, waist) — the Red Light Therapy Belt wraps and stays put, so you can read or watch TV through a session.
• Feet, heels and toes — the Red Light Therapy Slippers are the easiest option for anyone who can't comfortably bend down to aim a panel.
• Several areas, or a whole-body routine — the FX500 panel is our full-body flagship and covers the most surface area per session.
• Not sure — take the two-minute device finder quiz and it'll point you to a match.

One note on timing. If you're winding down an HSA and want something you'll actually use, pick the device that fits your daily routine. The most effective device is the one that ends up on the couch next to you, not the impressive one that lives in a closet.

Should I use my HSA now or save it for later?

There's no single right answer, and it depends on your tax picture and how much you're likely to need for care down the road. What's worth knowing is that HSA funds don't expire, they can be invested inside the account at many providers, and they keep their tax-free status for qualified expenses no matter how old you are. Some people treat the HSA as a long-term medical reserve. Others spend it as they go on the things that make day-to-day life easier. Both are legitimate. A tax professional who knows your situation can help you weigh it.

Frequently asked questions

Do HSA funds expire at 65?

No. HSA balances never expire and there's no use-it-or-lose-it deadline at any age. That's the big difference between an HSA and a health FSA.

Can I use my HSA to pay for my spouse's medical expenses after I'm on Medicare?

Yes. You can still use HSA funds for qualified expenses for your spouse and tax dependents, even though you can no longer contribute. Being on Medicare limits contributions, not spending.

Can my spouse still contribute to their own HSA if I'm on Medicare?

Generally yes, if they're HSA-eligible themselves — covered by a qualifying high-deductible plan and not enrolled in Medicare. Your enrollment doesn't cancel their eligibility. Family contribution limits can get technical here, so confirm the numbers with your plan administrator.

Is red light therapy FSA/HSA eligible?

Our devices are offered as FSA/HSA eligible, typically with a Letter of Medical Necessity. The step-by-step guide covers how the letter works and how to check out with your card.

Is red light therapy safe for people in their 70s and 80s?

It's generally considered low-risk and non-invasive, with no heat damage to skin at normal settings. That said, anyone with a photosensitizing medication, an active skin cancer concern, or a complex medical history should check with their doctor first.

What happens to my FSA when I retire?

A health FSA is tied to your employer, so it usually ends when your employment does (COBRA continuation is sometimes available). Unlike an HSA, unused FSA money generally doesn't follow you out the door — which is why spending it before you leave matters.

The short version

Enrolling in Medicare closes the door on new HSA contributions, but nothing closes the door on spending what you've already saved. The balance is yours, it's tax-free for qualified care, and it can go toward the everyday things that make your body feel better — including FSA/HSA-eligible red light therapy.

Lights on, pain off.

This article is for general education and is not medical advice, and it is not tax advice — confirm plan specifics with your benefits administrator or a tax professional. Red light therapy devices are intended for general wellness and are not intended to diagnose, treat, cure, or prevent any disease. Always check with a qualified healthcare provider before starting a new therapy.