Yes — period underwear is FSA eligible, and it’s HSA eligible too. Since the CARES Act added menstrual care products to the list of qualified medical expenses in 2020, the IRS has treated absorbent underwear designed for menstrual use the same as tampons, pads, cups, and liners.1Internal Revenue Service. IRS Outlines Changes to Health Care Spending Available Under CARES Act You can pay with your FSA or HSA debit card at checkout, or pay out of pocket and submit a receipt for reimbursement. No prescription, no letter of medical necessity.
The federal employee FSA program (FSAFEDS) spells this out directly, listing “menstrual undergarments” as eligible with nothing more than a detailed receipt.2FSAFEDS. Eligible Health Care FSA (HC FSA) Expenses The same rule applies to HSAs, Archer MSAs, and HRAs.
What Counts as Period Underwear
To qualify, the underwear needs to be built for menstrual absorbency — multiple absorbent layers and a leak-proof barrier in the gusset, sold as a replacement for or supplement to traditional menstrual products. The packaging or product page should say so in plain terms: “period underwear,” “menstrual underwear,” or an absorbency level like light, moderate, or heavy.
Products marketed only as moisture-wicking, athletic, or generally leak-resistant don’t qualify. If nothing on the label or listing ties the product to menstrual use, expect the claim to be rejected. Regular underwear from a brand that also happens to sell period styles doesn’t count either; each pair you submit has to be a designated menstrual product.
How to Pay
The easiest route is the FSA or HSA debit card at the point of sale. Larger retailers run purchases through an Inventory Information Approval System (IIAS) that flags eligible healthcare items automatically. If the card goes through, you’re done — no paperwork.
If the card is declined, or you’d rather pay another way, file a manual claim through your plan administrator’s portal or app. Upload a photo of the receipt, categorize it as an over-the-counter health product, and reimbursement usually lands by direct deposit within a few business days. Keep the receipt through the end of the plan year in case of an audit.
What Your Receipt Needs to Show
Plan administrators want proof that what you bought is actually eligible. A receipt should include:
- The merchant’s name
- The purchase date
- A product description that identifies the item as period or menstrual underwear
- The amount paid
Online order confirmations almost always have all four. In-store receipts are where claims most often stall, because the register may print something generic like “underwear” or “apparel.” If that happens, save the packaging or print the online product listing as backup. A letter of medical necessity isn’t required for period underwear,2FSAFEDS. Eligible Health Care FSA (HC FSA) Expenses but if a claim gets kicked back, a note from your doctor confirming menstrual management use will usually resolve it.
Using an FSA Before the Deadline
FSA money follows a use-it-or-lose-it rule: whatever’s left at the end of the plan year is generally forfeited.3Internal Revenue Service. Modification of Use-or-Lose Rule For Health Flexible Spending Arrangements Employers can offer one of two safety valves, but not both:
- A grace period of an extra two and a half months to incur new eligible expenses against last year’s balance.4Office of Personnel Management. Is There a Grace Period for FSAFEDS
- A carryover of up to $680 of unused funds into the next plan year (for 2026 into 2027), with any excess forfeited.5FSAFEDS. New 2026 Maximum Limit Updates
Check your plan documents to see which one, if either, your employer offers. Period underwear runs roughly $20 to $40 per pair, and most people want several, so it’s a practical way to spend down a balance in the last weeks of the plan year.
HSAs work differently. Balances roll over indefinitely and can be invested, so there’s no deadline pressure on the purchase.6Internal Revenue Service. Publication 969 (2025), Health Savings Accounts and Other Tax-Favored Health Plans Buy when you need to.
Buying for a Spouse or Dependent
You aren’t limited to your own purchases. FSA funds can reimburse eligible expenses for your spouse and anyone you claim as a tax dependent, and HSA distributions cover the account holder, spouse, and dependents the same way.6Internal Revenue Service. Publication 969 (2025), Health Savings Accounts and Other Tax-Favored Health Plans Period underwear for a teenage daughter who’s your dependent, for example, is reimbursable from your account.
What Isn’t Covered
Eligibility stops at the underwear itself. Specialty detergents or fabric washes marketed for cleaning period underwear fall into general personal-use hygiene and aren’t reimbursable without a letter of medical necessity.2FSAFEDS. Eligible Health Care FSA (HC FSA) Expenses Wet bags and storage pouches for used garments are treated the same way.
Shipping is a gray area. When a receipt breaks out shipping separately, most administrators will reimburse only the product cost. And regular underwear — even from a brand that also sells menstrual styles — doesn’t qualify. Every pair submitted needs to be built for menstrual absorbency.