AGI & Medical Expense
Deduction Calculator:
Know Your Exact Threshold
Your medical deduction doesn’t start at dollar one — it starts after you clear 7.5% of your Adjusted Gross Income (AGI). Most people don’t know their threshold, which means they either miss deductions they qualify for or don’t bother tracking expenses that could add up. This tool does the math in under a minute.
Enter your AGI (Line 11 of Form 1040) and your out-of-pocket medical costs — we’ll tell you exactly where you stand, how much you can deduct, and what to do next.
How AGI Determines Your Medical Deduction
Enter your AGI and medical costs — we’ll calculate your threshold and show you exactly what you can deduct.
What Is AGI and Why Does It Matter for Medical Deductions?
AGI — Adjusted Gross Income — is the number the IRS uses as your baseline for dozens of calculations, including the medical expense deduction. It’s your total income (wages, freelance earnings, investment income, etc.) minus specific “above-the-line” deductions you’re allowed to take before you even get to Schedule A.
Common above-the-line deductions that reduce your AGI include traditional IRA contributions, student loan interest, alimony paid (pre-2019 divorces), and — critically for self-employed people — self-employed health insurance premiums. Every dollar you reduce your AGI lowers your 7.5% floor, which makes it easier to qualify for a medical deduction.
How to Find Your AGI
If you’ve already filed your 2024 return, your AGI is on Line 11 of Form 1040. If you haven’t filed yet, estimate it like this: start with your total gross income, then subtract any IRA contributions you plan to make, student loan interest paid, and self-employed health insurance premiums if applicable. You don’t need an exact number — a close estimate is enough to see whether you’re likely to clear the threshold.
Strategies to Lower Your AGI (and Increase Your Deduction)
Because the threshold is a percentage of your AGI, reducing your AGI directly increases the value of your medical deduction. Three high-impact moves before December 31:
- Max your traditional IRA contribution — up to $7,000 ($8,000 if you’re 50+) for 2024, fully deductible if you qualify
- Contribute to an HSA — up to $4,150 individual / $8,300 family for 2024; contributions reduce AGI dollar-for-dollar
- Deduct self-employed health insurance above the line — if you’re self-employed, your health insurance premiums may be fully deductible from gross income, not just Schedule A
For the official IRS definition of AGI and above-the-line deductions, refer to IRS: Definition of Adjusted Gross Income.
What Medical Expenses Count Toward the Threshold?
The IRS allows a wide range of expenses under IRS Publication 502. Key qualifying costs include:
- Dental care — cleanings, fillings, crowns, braces, implants
- Vision expenses — glasses, contacts, LASIK, eye exams
- Prescription medications and insulin
- Mental health therapy — in-person and telehealth
- Medical travel — mileage at 21¢/mile, parking, tolls, lodging
- Durable medical equipment — CPAP machines, wheelchairs, hearing aids
- Alternative treatments — acupuncture and chiropractic if prescribed
What Doesn’t Count
Cosmetic procedures, gym memberships, vitamins and supplements, over-the-counter medications (except insulin), and any expenses paid by insurance or from an HSA or FSA are excluded. Only your true out-of-pocket costs count toward clearing the 7.5% threshold.
The Bundling Strategy: Push Over the Threshold Intentionally
One of the most underused tax moves for people near the threshold: deliberately schedule elective medical procedures in the same calendar year to cross the 7.5% floor. If you’re $2,000 short of your threshold in October, scheduling that dental crown, LASIK consultation, or new hearing aid before December 31 could generate a real deduction — one that would produce zero benefit if split across two tax years.
See the full medical costs deduction guide for more on this strategy, or use our main medical deduction calculator to model different scenarios.