Are You Leaving $1,000/Year
in Tax Savings on the Table?

How to Use This Calculator

The GLP-1 HSA and FSA Tax Savings Calculator answers a question most patients never think to ask: how much money am I losing every month by paying for my GLP-1 drug with after-tax dollars? The answer is almost always surprising — and the fix takes about five minutes at your pharmacy counter. This calculator has four inputs. Work through them in order and your results will appear immediately below.

Question 1 — Account type. Select whether you have an HSA, an FSA, both, or neither. If you are not sure which one you have, check your health insurance card or your most recent pay stub — HSA and FSA contributions appear as pre-tax deductions. If you have neither, select "Neither — but I want to know how" and the calculator will still show you the savings you are currently missing and explain how to access them.

Question 2 — Annual GLP-1 spend. Use the slider to set your current annual drug spend, or tap one of the quick-pick buttons that correspond to the most common cost tiers: compounded semaglutide at roughly $99 per month ($1,188 per year), savings card pricing at roughly $300 per month ($3,600 per year), NovoCare or LillyDirect self-pay at roughly $499 per month ($5,988 per year), or brand-name list price near $1,059 per month ($12,708 per year). If your actual monthly cost falls between these, set the slider manually. The slider runs from $500 to $16,000 per year and updates the savings calculation in real time.

Question 3 — Federal tax bracket. Use your marginal rate — the rate that applies to your highest dollar of income, not your average rate across all income. If you filed taxes last year, your marginal rate appears on your tax return or in your tax preparation software. The most common brackets for GLP-1 patients are 22% and 24%. If you are not sure, select the closest estimate — the result will still give you a useful order of magnitude even if slightly off.

Question 4 — State income tax. Most states that have an income tax also exempt HSA and FSA contributions from state taxes, adding meaningful extra savings on top of your federal deduction. Select the option that best matches your state. If you live in Texas, Florida, Washington, Nevada, South Dakota, Wyoming, or Alaska, select "No state tax" — those states have no personal income tax, so your savings are federal only.

Understanding Your Results

Once you tap Calculate, five numbers appear. The large green figure at the top is your estimated annual tax savings — the amount you are effectively overpaying every year by using after-tax dollars instead of pre-tax HSA or FSA funds. Below it, the breakdown grid separates your federal savings, state savings, and five-year savings projection. These three numbers together tell you what switching payment methods is worth over the realistic lifetime of your GLP-1 treatment.

The annual spend comparison bars

The two horizontal bars below the breakdown grid visualize exactly what the tax benefit means in practice. The gray bar represents what you currently pay annually with after-tax dollars. The green bar represents what that same spend effectively costs when routed through an HSA or FSA — because the money used to pay for it was never taxed in the first place. The gap between those two bars is real money that stays in your pocket every year, with zero change to your drug, your dose, or your prescriber.

The eligibility and account note

Below the comparison bars, the calculator shows a specific note based on your account type. If you have an HSA, it confirms the 2026 contribution limit and flags if your annual drug spend exceeds what you can contribute — in that case, savings are calculated only on the portion you can fund through the HSA. If you have an FSA, it reminds you of the use-it-or-lose-it rule and suggests matching your FSA contribution to your known drug spend. If you selected "Neither," the note explains specifically how to gain access to one of these accounts and how soon the savings could begin.

Can You Use HSA or FSA Money for GLP-1 Drugs?

Yes — and it is one of the most underused cost-reduction strategies available to GLP-1 patients. Ozempic, Wegovy, Mounjaro, Zepbound, and compounded semaglutide are all qualified medical expenses under IRS Publication 502 when prescribed by a physician. The prescription requirement is what makes them eligible — over-the-counter weight loss products do not qualify, but a prescription GLP-1 drug always does. Beyond the drug itself, your HSA or FSA can also pay for telehealth consultation fees, required lab work such as metabolic panels and A1C tests, syringes and needles if you use compounded vials, sharps disposal containers, and dietitian consultations that most GLP-1 programs recommend. Adding these expenses to your HSA budget pushes total eligible annual spend to $4,000 to $5,000 for many patients, which makes the tax savings even more substantial.

HSA vs. FSA: Which Is Better for Long-Term GLP-1 Costs?

An HSA is the better long-term vehicle if you qualify. It requires enrollment in a High Deductible Health Plan, but in return it offers a triple tax advantage: contributions go in pre-tax, any investment growth is tax-free, and withdrawals for qualified expenses are tax-free. Unused funds roll over indefinitely and can be invested in index funds once your balance exceeds the threshold your HSA provider sets — typically $1,000 to $2,000. For a patient who expects to use GLP-1 drugs for years or decades, the compounding effect of an invested HSA balance is a genuinely meaningful financial asset.

An FSA is the right tool if you are on a traditional PPO or HMO without access to an HDHP. The 2026 limit is $3,300 and the use-it-or-lose-it rule means you should contribute only what you know you will spend on GLP-1 costs during the year. The strategic approach is to calculate your expected annual drug spend in October during open enrollment and set your FSA contribution to match it exactly — zero waste, maximum tax savings.

What to Do Next Based on Your Results

If you already have an HSA or FSA, the next step is simple: call your pharmacy and confirm that your HSA or FSA debit card is on file for your GLP-1 prescription. Most major chains — CVS, Walgreens, Rite Aid, and Costco Pharmacy — accept these cards directly at the counter. If you use a telehealth platform for compounded semaglutide, check their payment settings; most accept HSA and FSA cards for the drug portion of your subscription. If you paid out of pocket recently, you can submit those receipts for retroactive reimbursement through your HSA or FSA administrator as long as the expense occurred after your account was opened.

If you do not currently have an HSA or FSA, your window is open enrollment — typically October through November for coverage starting January 1. Ask your HR department about adding an FSA to your current plan, or whether an HDHP option is available that would unlock HSA access. If you purchase your own insurance through the marketplace, any HDHP-compliant plan qualifies you to open an HSA independently through providers like Fidelity, HealthEquity, or Lively — no employer sponsorship required. The savings shown in this calculator start the first month you make your first HSA or FSA contribution and pay your GLP-1 prescription from that account.

To see your full cost picture, visit our True Monthly Cost Calculator which shows what you pay across all four payment scenarios, and our Brand vs. Compounded Savings Calculator which compares brand-name and compounded costs side by side.

Sources: IRS Publication 502 (Medical and Dental Expenses), IRS Revenue Procedure 2025-19 (2026 HSA contribution limits), IRS Notice 2025-22 (2026 FSA limits), Fidelity HSA investment guidelines. Tax savings are estimates based on marginal federal and state rates and may not reflect your full tax situation. Consult a qualified tax advisor for personalized guidance. This content is for informational purposes only and does not constitute tax or financial advice.