A $4,200 dental implant. An $800 ambulance ride. Three months of physical therapy at $150 a session. By March, you've spent $8,100 on medical costs your insurance didn't cover. But here's the part most people don't realize until they sit down with their tax forms: you can't deduct the first $4,500 of that.
The IRS only lets you deduct medical expenses that exceed 7.5% of your Adjusted Gross Income. For someone earning $60,000, that floor swallows $4,500 before a single dollar becomes deductible [1].
30-Second Summary: You can deduct unreimbursed medical expenses on Schedule A, but only the portion exceeding 7.5% of your AGI. You must itemize to claim the deduction, and your total itemized deductions need to beat the standard deduction for it to matter. About two-thirds of medical expense deductions are claimed by taxpayers over 65.
How the 7.5% Floor Works
The calculation is straightforward but unforgiving.
Step 1: Find your Adjusted Gross Income (AGI). That's line 11 on Form 1040. It's your gross income minus adjustments like 401(k) contributions, student loan interest, and HSA contributions.
Step 2: Multiply your AGI by 0.075. That's your floor.
Step 3: Subtract the floor from your total qualified medical expenses. Only the amount above the floor is deductible.
For someone with a $60,000 AGI:
- Floor: $60,000 × 7.5% = $4,500
- If total medical expenses = $8,100
- Deductible amount: $8,100 − $4,500 = $3,600
That $3,600 then goes on Schedule A as an itemized deduction. But it only helps if your total itemized deductions (medical, SALT, mortgage interest, charity) exceed the standard deduction [1].
This is why the medical expense deduction benefits a very specific group of people: those with high medical costs relative to their income who also have enough other itemized deductions to beat the standard deduction. About two-thirds of all medical expense deductions are claimed by taxpayers over 65 [2]. That makes sense: medical costs rise with age, and income often drops in retirement, lowering the 7.5% floor.
What Qualifies as a Medical Expense
The IRS defines qualified medical expenses as costs for "the diagnosis, cure, mitigation, treatment, or prevention of disease, and for treatments affecting any part or function of the body" [1]. That's broad, but the edges matter.
Yes, You Can Deduct These
- Doctor, dentist, and specialist copays and fees
- Hospital bills and surgery
- Prescription medications and insulin
- Lab work and diagnostic tests
- Mental health services (therapy, psychiatry)
- Dental work (crowns, implants, dentures)
- Vision care (glasses, contacts, LASIK)
- Hearing aids
- Crutches, wheelchairs, and medical equipment
- Ambulance fees
- Addiction treatment and rehab
- Acupuncture
- Chiropractic care
- Service animals and their care
- Home modifications for medical purposes (ramps, widened doorways)
- Health insurance premiums paid with after-tax dollars
- Medicare Part B and Part D premiums
- Long-term care insurance premiums (subject to age-based limits)
- Travel to and from medical treatment (21 cents per mile for 2024 and 2025, plus tolls and parking) [3]
- Lodging while away from home for medical care (up to $50 per night per person) [1]
No, You Cannot Deduct These
- Cosmetic surgery (unless it corrects a deformity from an accident, disease, or congenital abnormality)
- Gym memberships (unless prescribed by a doctor for a specific diagnosed condition like obesity)
- Over-the-counter medications (general health, not prescribed)
- Teeth whitening
- Funeral expenses
- Non-prescription vitamins and supplements
- General health improvement programs
- Health insurance premiums deducted from your paycheck pre-tax (you already got the tax benefit)
That last one catches people constantly. If your employer deducts health insurance premiums from your paycheck before taxes (which most do), you've already received the tax benefit. You can't deduct them again on Schedule A. Only premiums paid with after-tax dollars count [1].
A Worked Example: When the Deduction Matters
Meet Patricia, age 45, single, filing for tax year 2024.
- Gross salary: $65,000
- 401(k) contribution: $5,000
- AGI: $60,000
Step 1: Calculate the floor.
$60,000 × 7.5% = $4,500
Step 2: Total qualified medical expenses.
| Expense | Amount |
|---|
| Emergency surgery (out-of-pocket) | $4,000 |
| Dental implants (not covered) | $3,500 |
| Prescriptions | $500 |
| Uber rides to hospital | $100 |
| Total | $8,100 |
Step 3: Calculate the deduction.
$8,100 − $4,500 = $3,600 in deductible medical expenses.
Step 4: Should Patricia itemize?
| Itemized Deduction | Amount |
|---|
| Medical expenses (above floor) | $3,600 |
| State and local taxes (SALT) | $2,500 |
| Mortgage interest | $9,000 |
| Total Itemized | $15,100 |
| Standard Deduction (Single) | $14,600 |
Patricia should itemize. Her total itemized deductions ($15,100) beat the standard deduction ($14,600) by $500. Without the medical expense deduction, she'd have only $11,500 in itemized deductions and would take the standard deduction instead.
The medical expenses tipped the scale. That's the role this deduction plays: it's often the marginal factor that pushes someone from standard to itemized.
Strategies to Make the Deduction Work
Time Your Expenses
If you know you'll need expensive dental work, elective surgery, or other major medical spending, consider clustering those expenses into one calendar year. Getting two dental implants in December and two more in January of the next year splits the expenses across two tax years, potentially keeping both years below the floor.
Getting all four implants in December puts the full cost in one year, giving you a better chance of exceeding the 7.5% threshold.
(Yes, tax optimization sometimes means scheduling your dental implants strategically. Nobody said personal finance was glamorous.)
Lower Your AGI
The lower your AGI, the lower your 7.5% floor. Maximize pre-tax retirement contributions (401(k), traditional IRA), contribute to an HSA if eligible, and claim all above-the-line deductions available to you.
Patricia's 401(k) contribution already lowered her AGI from $65,000 to $60,000, dropping her floor from $4,875 to $4,500. An extra $1,000 in 401(k) contributions would lower the floor by another $75.
Keep Every Receipt
The IRS can ask for documentation years after you file. Save:
- Explanation of Benefits (EOB) statements from insurance
- Pharmacy receipts
- Doctor and hospital bills
- Mileage logs for medical travel
- Prescription records
A dedicated folder (or a free app like Expensify) makes this painless. You don't need to submit receipts with your return, but you need them if the IRS asks.
Don't Forget the Mileage
At 21 cents per mile, medical mileage adds up faster than you'd think. Ten round trips to a specialist 30 miles away: 600 miles × $0.21 = $126. Add tolls and parking. It's not going to make you rich, but every qualifying dollar helps you clear the 7.5% hurdle [3].
The HSA Alternative
Health Savings Accounts deserve mention here because they're a competing (and often superior) strategy for handling medical costs tax-efficiently. HSA contributions are tax-deductible above the line, the money grows tax-free, and withdrawals for qualified medical expenses are tax-free.
If you have an HSA-eligible high-deductible health plan, using the HSA for medical costs often beats the itemized deduction approach. You get the tax benefit without needing to clear the 7.5% floor or itemize.
But you can't double-dip. Expenses paid with HSA funds can't also be claimed as an itemized medical deduction [1].
Your Next Move
- Start tracking medical expenses now. Don't wait until tax season. Create a folder (digital or physical) and drop every EOB, receipt, and pharmacy printout into it.
- Calculate your floor. Take your expected AGI and multiply by 0.075. If your unreimbursed medical costs won't exceed that number, the deduction won't help you this year.
- Check whether you'd itemize. Add your medical deduction to your SALT, mortgage interest, and charitable donations. If the total exceeds your standard deduction, you benefit from itemizing.
- Consider timing. If you're close to the 7.5% threshold, schedule elective procedures before December 31 to push expenses into the current tax year.
- Use our tax refund calculator to see whether the medical deduction makes itemizing worthwhile for your specific numbers.
If you're 65 or older, you're in the demographic most likely to benefit from this deduction, and you should also explore the extra standard deduction for seniors, which stacks with itemizing strategies. For a broader look at whether itemizing or the standard deduction saves you more, see our standard deduction vs. itemized comparison. And if you want to understand how retirement account contributions lower your AGI and therefore your medical expense floor, start there.
References
- Internal Revenue Service. (2024). Publication 502: Medical and Dental Expenses. IRS.gov.
- Brookings Institution. (2025). Medical Expense Deduction Analysis. Brookings.edu.
- Internal Revenue Service. (2024). Notice 2024-08: Standard Mileage Rates. IRS.gov.
