Can You Reimburse Yourself From Your HSA Later? The Receipt Rule Explained

Short answer: yes. The IRS does not set a deadline for reimbursing yourself from an HSA. As long as the expense happened after your HSA was opened, and you keep the receipt, you can pay out of pocket today and pull that money back out of your HSA next month, next year, or a decade from now — tax-free.

This trips up a lot of people. They see a device they need, check their HSA balance, and think the money has to move at the exact moment of purchase. It doesn't. Understanding that one detail gives you a lot more flexibility, especially at the end of a plan year or when your balance is tied up in investments.

What does "reimburse yourself later" actually mean?

It means paying for a qualified medical expense with your regular debit or credit card, then taking a matching distribution from your HSA at some later point to pay yourself back. The IRS treats that distribution as tax-free because it's covering a qualified expense — the timing of the two events doesn't have to match.

So if you buy a red light therapy panel in August and reimburse yourself in December, or in 2031, the tax treatment is the same. What matters is that the expense was incurred after your HSA was established and that you never claimed it twice or deducted it elsewhere on your taxes.

Is there a time limit on HSA reimbursement?

No. There is no IRS-imposed deadline. IRS Publication 969, which governs HSAs, allows tax-free distributions for qualified expenses without stating an expiration window. The two real limits are:

• The expense must come after your HSA existed. A bill from before you opened the account doesn't qualify, no matter how medical it is.
• You need proof. Your HSA administrator may not ask for a receipt when you take the distribution, but the IRS can ask later. That's your job to keep, not theirs.

Why would anyone wait to reimburse themselves?

A few practical reasons come up over and over:

• Your HSA money is invested. Many HSAs let you invest above a cash threshold. Leaving the balance in place lets it keep growing tax-free while you carry the expense on a card you're paying off anyway.
• Cash flow this month is tight. Maybe your HSA is thin right now but your contributions will build it back by spring. Buy now, reimburse when the balance is there.
• You want a tax-free cushion later. Some people keep a folder of old receipts specifically so they can pull tax-free money out during a year they need it.
• Your benefits card was declined. It happens, often for reasons that have nothing to do with eligibility. Paying with a regular card and filing for reimbursement is a clean workaround. We wrote about that in FSA or HSA Card Declined? Why It Happens and How to Still Pay Pre-Tax.

Does the same rule apply to an FSA?

No — and this is the mistake that costs people money. An FSA is not an HSA. FSA funds are tied to a plan year, and most plans are use-it-or-lose-it with only a short window afterward to file claims.

That claim window is called a run-out period. It's set by your employer, not the IRS, and 90 days after the plan year ends is common. During the run-out you can submit paperwork for expenses you already incurred, but you cannot incur new ones. Separately, some employers offer either a grace period (extra time to actually spend the money) or a modest carryover into the next year — plans can offer one or the other, not both. Check your plan documents or ask HR, because the specifics genuinely vary.

The practical takeaway: if you're on an FSA, buy earlier and file sooner. If you're on an HSA, you have far more room to breathe.

What records should you keep?

Keep enough that a stranger reading the file in ten years could tell what you bought and why. That usually means:

1. The itemized receipt or order confirmation showing the date, the item, and the amount.
2. Proof of payment — the card statement line or payment confirmation.
3. A Letter of Medical Necessity (LMN) if your plan asks for one for wellness devices. Our walkthrough on how to get an LMN online covers what that involves.
4. A note to yourself recording whether you've already reimbursed this expense, so you never double-dip.

Scan them to a cloud folder. Thermal receipts fade, and if you're planning to reimburse yourself years from now, a shoebox in the garage is not a filing system.

Does a red light therapy device qualify?

Red light therapy devices are commonly treated as FSA/HSA-eligible, and some plans ask for a Letter of Medical Necessity to document that you're using the device for a specific health reason rather than general wellness. Every device in our FSA/HSA-eligible collection is set up for this. If you want the full step-by-step, start with Is Red Light Therapy FSA Eligible? How to Pay With Your FSA or HSA Card.

What does the research actually say?

Red light therapy — researchers call it photobiomodulation — uses specific wavelengths of red and near-infrared light that are absorbed by cells and appear to influence energy production and inflammatory signaling. It is studied as an adjunct alongside standard care, not as a replacement for it.

The evidence is genuinely mixed, and we'd rather tell you that than oversell. A systematic review and meta-analysis in the European Journal of Physical and Rehabilitation Medicine reported reductions in pain across musculoskeletal conditions, with results appearing stronger when dosing followed established guidelines. On the other hand, a systematic review published in the Journal of Physiotherapy concluded that for non-specific low back pain, the effect compared with sham treatment was not clinically important. A broader literature review on photobiomodulation for pain and inflammation lands in between, noting positive findings in some trials while flagging inconsistency in dosing and study design.

What that means for you: it's a reasonable, low-risk thing to try, results vary by person and by how consistently you use it, and dose and placement matter more than most marketing admits.

Which device should you buy?

Match the device to the area you actually want to treat:

• Whole-body or large areas (back, hips, legs): the FX500 panel is our flagship full-body option at $269.99.
• Targeted joints in a smaller space: the FX300 panel at $199.99 covers a focused area with both 660nm and 850nm light.
• Hands-free wrap for back, knee, waist, or shoulder: the Red Light Therapy Belt at $119.99 straps on while you go about your evening.
• Face and neck: the FDA-cleared LX500 face mask at $279.99.

Not sure? Take the device finder quiz — two minutes and it points you to the right one.

Frequently asked questions

Can I reimburse myself from my HSA for an expense from three years ago?

Yes, provided the expense was incurred after you opened the HSA, it was a qualified medical expense, you still have documentation, and you haven't already been reimbursed for it or deducted it on your tax return.

Do I have to submit receipts to my HSA administrator?

Usually not at the moment of distribution. But you're responsible for proving the expense qualified if the IRS asks, so keep the records yourself for as long as you hold the account.

Can I do the same thing with an FSA?

Not in the same open-ended way. FSA claims are tied to the plan year and must be filed within your plan's run-out period. Ask your benefits administrator for your exact deadline.

What if I reimburse myself for something that turns out not to qualify?

That distribution becomes taxable income, and if you're under 65 there's generally an additional penalty. When you're unsure whether something qualifies, ask your plan administrator or a tax professional before you take the money out.

Does a red light therapy device need a Letter of Medical Necessity?

It depends on your plan. Some accept the purchase directly; others want an LMN documenting the health reason. Getting one is straightforward and worth doing if there's any doubt.

Can I use my HSA for a family member's device?

Generally yes for a spouse or tax dependent. We covered the IRS rules in Can You Use Your FSA or HSA for a Spouse or Parent?

The bottom line

An HSA is more flexible than most people realize. You don't have to time your purchase to your balance — you just have to keep the paperwork. If a device would help you feel better now, buy it now, save the receipt, and pay yourself back whenever it makes sense. Just don't assume an FSA works the same way; that one has a clock on it.

Lights on, pain off.

This article is for general education and is not medical advice. 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.

This article is also not tax advice. HSA and FSA rules depend on your specific plan and situation — confirm details with your plan administrator or a qualified tax professional.