HSA and FSA for GLP-1 Drugs

A health savings account or flexible spending account turns pre-tax dollars into medicine. For a drug that can run several hundred dollars a month, that discount is real money — roughly the size of your combined federal, state and payroll tax rate.

But the rules have edges, and the edges are where people get letters from their administrator asking for documentation months later. This article explains what qualifies, what paperwork to keep, and how to think about the bigger question of whether to run a fill through insurance at all. It is general information, not tax or medical advice. Where it describes how a medicine is used, it is summarizing FDA-approved labeling and Instructions for Use; follow your own prescription and your prescriber’s directions.

Is a GLP-1 a qualified medical expense?

Start with the two rules that decide everything.

Rule one: prescription drugs are qualified medical expenses. IRS Publication 502 defines medical expenses as costs paid to diagnose, cure, mitigate, treat or prevent disease, and prescribed medicines fall squarely inside that. A GLP-1 prescribed for type 2 diabetes, for cardiovascular risk reduction, for obstructive sleep apnea or for chronic weight management in someone with a diagnosed condition is a prescribed medicine for a diagnosed disease.

Rule two: weight loss for appearance or general wellness does not qualify. Publication 502 says it plainly: you cannot include the cost of a weight-loss program if the purpose is the improvement of appearance, general health or sense of well-being, and you cannot include amounts you pay to lose weight “unless the weight loss is a treatment for a specific disease diagnosed by a physician (such as obesity, hypertension, or heart disease)” [1]. The IRS confirmed the same standard for accounts specifically: in a 2023 FAQ, it answered that the cost of a weight-loss program is a medical expense that can be paid or reimbursed by an HSA, FSA, Archer MSA or HRA “only if the program treats a specific disease diagnosed by a physician (such as obesity, diabetes, hypertension, or heart disease)” [3].

Two related items are excluded outright. Gym, health club and spa membership dues are never qualified medical expenses, though separate fees charged there for weight-loss activities can be. And the cost of diet food and beverages does not qualify, because they substitute for what you would normally eat anyway [1].

So: a prescription GLP-1 tied to a documented diagnosis, yes. A GLP-1 obtained purely for cosmetic weight loss, no.

Do I need a letter of medical necessity?

Usually not by law, but frequently by administrator policy.

Your HSA or FSA administrator is responsible for substantiating that expenses are qualified. Prescription drugs for an obvious medical condition normally sail through. Weight-management prescriptions often get flagged, because the administrator cannot tell from a pharmacy receipt whether you are treating diagnosed obesity or pursuing cosmetic weight loss. That is why consumer guidance consistently recommends having a letter of medical necessity for a GLP-1 prescribed for weight management [6].

A letter of medical necessity for account purposes is short and different from a prior authorization letter. It typically states the diagnosed condition, that the treatment is medically necessary for that condition rather than for general health or appearance, the expected duration, and the provider’s signature. Your provider writes it. You keep it.

Practical advice that costs nothing: before the first purchase, call your administrator and ask what documentation it requires for a prescription weight-management drug, and whether it will accept a letter dated after the purchase. Then keep, for each fill, the prescription record, an itemized receipt showing the drug name and date, and the letter if one is required. Keep them at least as long as you keep tax records.

What about compounded semaglutide or tirzepatide?

This is genuinely murkier, and the honest answer is that it depends on your administrator.

A compounded product is still dispensed on a prescription, which is the basic test. But compounded GLP-1s are not FDA-approved products, some administrators treat them differently, and some telehealth sellers do not accept HSA or FSA cards at checkout at all — requiring you to pay with a personal card and submit an itemized receipt for reimbursement instead.

If you are considering this route, ask the administrator the question in writing before you spend, and keep the prescription and itemized receipt. And talk to a healthcare provider about compounded products generally; they are a different regulatory category from the approved brands.

Can I deduct GLP-1 costs on my taxes?

Technically yes, practically rarely.

Unreimbursed qualifying medical expenses are deductible on Schedule A only to the extent they exceed 7.5 percent of your adjusted gross income, and only if your total itemized deductions beat the standard deduction [7]. Publication 502’s weight-loss rule applies here too: amounts paid to lose weight are deductible only when the weight loss treats a physician-diagnosed disease such as obesity, hypertension or heart disease, and gym dues and diet food never qualify [1].

Two further limits. You cannot deduct anything insurance reimbursed [1]. And you cannot deduct an expense you already paid with tax-free HSA or FSA money — that would be a double benefit.

Work an example. On an adjusted gross income of $80,000, the floor is $6,000. If you spent $4,200 on a GLP-1 for the year and had $1,500 of other qualifying medical costs, your $5,700 total is below the floor and nothing is deductible. It takes a high-cost year, a low income relative to costs, or both. Talk to a tax professional about your own situation.

What are the 2026 account numbers?

For 2026 [4][5]:

	Self-only	Family
HSA contribution limit	$4,400	$8,750
HDHP minimum deductible	$1,700	$3,400
HDHP maximum out-of-pocket	$8,500	$17,000

These come from IRS Revenue Procedure 2025-19 [14], read directly on September 14, 2026: it sets the 2026 contribution limits at $4,400 self-only and $8,750 family, requires an HSA-qualified high-deductible health plan to carry a deductible of not less than $1,700 self-only or $3,400 family, and caps annual out-of-pocket expenses at $8,500 self-only and $17,000 family. For 2027 the HSA limits rise to $4,500 and $9,000, with HDHP minimum deductibles of $1,750 and $3,500 and out-of-pocket maximums of $8,700 and $17,400, set by Revenue Procedure 2026-24 [4].

Health FSA contribution limits are set separately. IRS Revenue Procedure 2025-32 puts the 2026 limit on employee salary reduction contributions to a health FSA at $3,400, with a maximum carryover of $680 into the following plan year (both verified 2026-09-14 in the Revenue Procedure itself) [15]. That is a per-employee limit, not per household — two working spouses with their own FSAs can each elect up to it — and your employer may set a lower internal limit, so check your plan documents.

One 2026 change worth knowing: bronze and catastrophic ACA Marketplace plans now count as HSA-qualified high-deductible plans by statute, which opens HSA eligibility to people who did not have it before [5].

Should I run the fill through insurance or pay cash?

This is the question people actually want answered, and the math has four inputs plus one comparison.

The four inputs:

1. Remaining deductible. On most plans with a deductible, early-year fills are billed at the full negotiated price until it is met.
2. Cost share after the deductible. A flat copay is predictable. Coinsurance is a percentage of the plan’s negotiated price and moves with it.
3. Distance to your out-of-pocket maximum. Once you reach it, covered claims cost you nothing for the rest of the plan year. In 2026 an HSA-qualified plan’s out-of-pocket maximum cannot exceed $8,500 self-only or $17,000 family [4].
4. Savings card caps, if you have commercial insurance and the manufacturer program applies.

The comparison that decides it: covered claims count toward your deductible and out-of-pocket maximum. Cash purchases outside the benefit do not. A GoodRx coupon and an insurance claim cannot both be applied to the same fill — the pharmacy runs one or the other — and choosing the coupon means that spending does not move you toward your deductible [8].

Use real numbers rather than a made-up example. As of September 14, 2026 NovoCare publishes a self-pay Wegovy pen price of $349 a month for the 0.25 through 2.4 mg doses (with a limited-time $199 a month for the first two fills for patients new to the offer, and $399 a month for Wegovy HD 7.2 mg), and Lilly publishes self-pay Zepbound starting at $299 a month for the KwikPen or vials. Novo labels its pen pricing a limited-time offer to be updated after December 31, 2026, so check it before you plan around it [16][17]. Against a figure like that, a $349 cash price can genuinely beat a $500 insured price. But if you expect other significant medical costs this year — surgery, a new diagnosis, a family member’s care — then $500 that counts toward the deductible can be worth more than $349 that does not. Run the whole year, not the month.

There is one more wrinkle. If your plan runs a copay accumulator or maximizer, manufacturer savings-card dollars do not count toward your deductible either. An accumulator accepts the card but excludes those dollars from your accumulators, producing a cliff when the card’s annual cap runs out. A maximizer instead raises your monthly cost share to a figure that drains the card evenly across twelve months, avoiding the cliff but ensuring the plan never pays. Drug Channels Institute estimated that for 2025 about 17 percent of the total US commercial market — more than 34 million people — were in plans required to count copay assistance toward patient cost-sharing limits, and reported that New Jersey became the 26th state to enact an anti-accumulator law in January 2026. Those laws do not apply to self-funded employer plans [10]. Some employer programs deliberately do the opposite: Evernorth’s $200 monthly out-of-pocket cap for Wegovy and Zepbound is explicitly designed so that what patients pay counts toward the deductible (verified 2026-09-14 against Evernorth’s own announcement) [11][18].

Ask your plan directly: “Does manufacturer copay assistance count toward my deductible and out-of-pocket maximum?” The answer changes the math.

Can I use HSA money in a high-deductible plan year?

Yes, and this is one of the cleanest uses of an HSA. In an HSA-qualified plan, most non-preventive care is paid entirely by you until the deductible is met [4]. A GLP-1 filled in January on a $3,000 deductible can be a full-price bill. Paying that from the HSA converts it to pre-tax money.

A caution for anyone whose employer offers a GLP-1 reimbursement arrangement: benefits counsel note that for HSA-qualified plans, an HRA or lifestyle-account structure generally must either limit reimbursements to preventive-use products or wait until the IRS minimum deductible is satisfied, or the employee loses HSA eligibility [13]. If your employer offers something like this, ask whether it is HSA-compatible before enrolling.

Does a GLP-1 affect life insurance?

Separate topic, same money conversation, and it comes up constantly.

Life insurers can see prescription history through databases, and underwriters treat GLP-1s as one of the least self-explanatory drug classes they encounter, because the same medicine can point to type 2 diabetes, cardiovascular disease, obstructive sleep apnea, fatty liver disease or uncomplicated obesity — conditions with very different mortality profiles [12]. Industry guidance emphasizes two things: duration, meaning whether the applicant has been on therapy more than a year, and consistency, meaning whether fills are regular, given that a large share of patients discontinue within a year and weight often returns when treatment stops [12].

Brokerage commentary suggests applicants who lost substantial weight on a GLP-1 may still be assessed on their pre-treatment build, and that recent discontinuation can itself be viewed as a risk factor. Practices vary by carrier and none publish underwriting manuals, so treat this as directional. The one firm rule: answer every application question truthfully. Misrepresentation on an insurance application can void a policy.

A short checklist

• Confirm the prescription is tied to a documented diagnosis.
• Ask your HSA or FSA administrator what documentation it wants for a weight-management drug, in writing.
• Get a letter of medical necessity from your provider if the administrator asks for one.
• Keep the prescription record and an itemized receipt for every fill.
• Before assuming cash is cheaper, ask whether manufacturer assistance counts toward your deductible.
• Run the full-year math, not the single-fill math.
• Talk to a tax professional before claiming a deduction, and to a healthcare provider before changing anything about your treatment.

Sources

1. Internal Revenue Service, Publication 502, Medical and Dental Expenses. https://www.irs.gov/publications/p502
2. Internal Revenue Service, 2025 Publication 502 (PDF). https://www.irs.gov/pub/irs-pdf/p502.pdf
3. Internal Revenue Service, Frequently asked questions about medical expenses related to nutrition, wellness and general health. https://www.irs.gov/individuals/frequently-asked-questions-about-medical-expenses-related-to-nutrition-wellness-and-general-health
4. HealthCare.gov, What are Health Savings Account-eligible plans? https://www.healthcare.gov/high-deductible-health-plan
5. Triage Health, Quick Guide to High Deductible Health Plans, HSAs, & FSAs. https://triagehealth.org/quick-guides/hdhp
6. Forbes Health, GLP-1s: FSA & HSA Eligibility. https://www.forbes.com/health/weight-loss/are-glp-1s-fsa-hsa-eligible
7. GoodRx, 99 Tax-Deductible Medical Expenses in 2026. https://www.goodrx.com/insurance/taxes/deductible-medical-expenses
8. GoodRx, GoodRx Coupons for Brand Drugs: A Detailed Overview. https://www.goodrx.com/drugs/savings/goodrx-coupon
9. GoodRx, Manufacturer Copay Cards: Everything You Need to Know. https://www.goodrx.com/drugs/savings/what-are-manufacturer-copay-cards
10. Drug Channels Institute, Copay Accumulators and Maximizers in 2025: Popular, Profitable, and Problematic, February 10, 2026. https://www.drugchannels.net/2026/02/copay-accumulators-and-maximizers-in.html
11. Fierce Healthcare, New Evernorth program to cap out-of-pocket costs for GLP-1s at $200. https://www.fiercehealthcare.com/payers/new-evernorth-program-cap-out-pocket-costs-wegovy-zepound-200
12. Milliman IntelliScript, How underwriters should interpret GLP-1 prescriptions. https://www.rxhistories.com/how-underwriters-should-interpret-glp-1-prescriptions-and-what-they-signal-about-risk
13. Bass Berry & Sims, Emerging Alternatives for GLP-1 Prescription Drug Coverage. https://www.bassberryhrlawtalk.com/emerging-alternatives-glp-1-prescription-drug-coverage
14. Internal Revenue Service, Revenue Procedure 2025-19 (2026 HSA and HDHP inflation-adjusted amounts), May 1, 2025. https://www.irs.gov/pub/irs-drop/rp-25-19.pdf
15. Internal Revenue Service, Revenue Procedure 2025-32 (2026 cafeteria plan and health FSA limits), October 9, 2025. https://www.irs.gov/pub/irs-drop/rp-25-32.pdf
16. Novo Nordisk / NovoCare, Savings Offer Program for Wegovy (semaglutide), self-pay pricing footnotes, retrieved September 14, 2026. https://www.novocare.com/patient/medicines/wegovy/savings-offer.html
17. Eli Lilly and Company, Savings & Insurance Options | Zepbound, retrieved September 14, 2026. https://zepbound.lilly.com/savings
18. Evernorth, Evernorth Launches New Benefit Option That Drives Lower Net Cost for Weight Loss Medicines and Limits Patient Cost to No More Than $200 Per Month, May 21, 2025. https://www.evernorth.com/articles/evernorth-launches-new-benefit-option-drives-lower-net-cost-weight-loss-medicines