Medical Expense Deductions: What Qualifies and Thresholds

Medical and dental expenses that exceed 7.5 percent of your adjusted gross income can be deducted if you itemize on Schedule A. This threshold means the deduction primarily benefits taxpayers with very high medical costs relative to their income. Understanding which expenses qualify and planning strategically around the threshold can help you capture a deduction that many taxpayers miss.

The 7.5 Percent AGI Threshold

You can only deduct the portion of medical expenses that exceeds 7.5 percent of your AGI. For someone with an AGI of 60,000 dollars, the threshold is 4,500 dollars. If total qualifying medical expenses are 8,000 dollars, only 3,500 dollars is deductible. This high bar means the deduction most commonly applies during years with major medical events like surgery, extensive dental work, or ongoing treatment for chronic conditions.

Qualifying Medical Expenses

• Doctor, dentist, surgeon, and specialist fees
• Hospital and nursing facility charges
• Prescription medications and insulin
• Diagnostic tests, X-rays, and lab work
• Mental health services and substance abuse treatment
• Medical equipment like wheelchairs, hearing aids, and eyeglasses
• Transportation to and from medical care including mileage at 22 cents per mile
• Long-term care insurance premiums up to age-based limits
• Health insurance premiums you pay with after-tax dollars

What Does Not Qualify

Cosmetic surgery and procedures that are not medically necessary do not qualify. Over-the-counter medications other than insulin are not deductible. Gym memberships, nutritional supplements, and general health improvement expenses are not deductible unless prescribed by a doctor for a specific condition. Expenses reimbursed by insurance or paid from an HSA or FSA cannot also be claimed as a deduction.

Timing Strategies

If you expect to exceed the 7.5 percent threshold in a given year due to a major procedure, consider scheduling other elective medical work in the same year. Dental work, vision correction, and preventive screenings can be timed to maximize the deduction when you are already over the threshold. This bunching strategy is especially effective in years when you plan to itemize for other reasons as well.

The 7.5% AGI Floor and the Bunching Strategy

Section 213 allows medical expense deductions only to the extent they exceed 7.5% of AGI — and only if the taxpayer itemizes rather than taking the standard deduction. For a household with $120,000 AGI, the first $9,000 of medical expenses produces zero deduction; only dollars above that threshold count. This floor is what makes medical deductions so rarely useful in practice: most households with ordinary insurance coverage never accumulate enough out-of-pocket spending in a single year to cross the threshold.

Bunching Medical Expenses Across Tax Years

Taxpayers with discretionary timing over major medical procedures can 'bunch' expenses into a single tax year to cross the 7.5% floor. Elective surgery, dental work (crowns, implants, orthodontia), vision correction (LASIK), and accumulated physical therapy can often be timed to fall in the same calendar year rather than split across two. A family facing $15,000 of planned dental work can schedule it all before December 31 rather than splitting January/November — converting a non-deductible expense into one that may save $1,500+ in tax at the 22% bracket.

Often-Missed Deductible Categories

• Transportation to medical care: 21 cents per mile in 2025, plus parking and tolls
• Lodging near a medical facility: up to $50 per night per person while receiving care
• Capital improvements to a home for medical necessity (wheelchair ramps, walk-in showers) — deductible to the extent cost exceeds home value increase
• Long-term care insurance premiums — deductible up to age-based annual caps under Section 213(d)(10)
• Health insurance premiums paid with after-tax dollars — common for the self-employed who do not qualify for the above-the-line SE health deduction
• Smoking cessation programs, weight-loss programs prescribed for a diagnosed condition, and fertility treatments

References

• IRS: Topic 502 Medical and Dental Expenses (irs.gov/taxtopics/tc502)
• IRS Publication 502: Medical and Dental Expenses (irs.gov/publications/p502)

Key Takeaways

• Medical expenses are deductible only to the extent they exceed 7.5% of AGI — a high floor for most taxpayers.
• Qualifying expenses include prescriptions, insurance premiums paid with after-tax dollars, glasses, dental, mental health, and travel for care.
• Long-term care premiums are deductible up to age-based limits ($5,960 in 2025 for ages 71+).
• Medicare Parts B, C, and D premiums qualify, but self-employed taxpayers may deduct them above-the-line (no AGI floor).
• Cosmetic surgery, gym memberships, and most over-the-counter drugs generally do not qualify.

Common Mistakes to Avoid

• Including insurance premiums already paid pre-tax through payroll — they're already excluded from W-2 wages.
• Forgetting travel: 21¢ per mile in 2025 for medical miles, plus tolls and parking at providers.
• Mixing timing — medical expenses are deductible in the year paid, not the year billed or service rendered.
• Skipping qualified long-term-care insurance premium caps — amounts above the age limit are not deductible.
• Missing the HSA/FSA coordination — expenses paid from those accounts cannot also be deducted.

Thomas K.'s Surgery Year: $18,400 Medical, $11,800 Deductible

Thomas K. is a single filer in New Jersey earning $88,000 who had major back surgery in 2025. His total out-of-pocket medical expenses hit $18,400 after insurance — unusually high because of a deductible reset plus out-of-network physical therapy. Medical expense deductions are severely restricted: only the portion above 7.5% of AGI is deductible, so his $18,400 produced $11,800 of actual tax deduction.

• Gross income: $88,000 | AGI after adjustments: $88,000 (no above-the-line items)
• 7.5% of AGI threshold: $6,600
• Total qualifying medical expenses (surgery copay, hospital, PT, prescriptions, required devices): $18,400
• Deductible portion: $18,400 − $6,600 = $11,800
• Must itemize to use the medical deduction (standard deduction $15,000 single)
• Thomas's other itemizable: SALT $8,600 + mortgage interest $4,200 + charity $1,200 = $14,000
• Itemized total: $14,000 + $11,800 medical = $25,800 — beats standard by $10,800
• Federal tax saved at 22% marginal: $2,376 | NJ state savings at 6.37%: $688

The 7.5% AGI floor eliminates the medical deduction for almost everyone in a normal year — only in years of major surgery, chronic-illness expense, or long-term-care costs does it become useful. Qualifying expenses are broad: premiums (if paid with post-tax dollars), prescriptions, dental, vision, required home modifications, mileage to medical appointments at $0.21/mile (2025 rate), and insulin without prescription. Cosmetic procedures, general-wellness gym memberships, and most supplements do not qualify.

Scenario: Linnea C. Crosses the 7.5% AGI Medical Floor

Linnea C. and spouse (MFJ, Michigan, $62,000 combined) had a medically expensive year - a surgery with high out-of-pocket costs. Medical expenses are deductible only above 7.5% of AGI and only if they itemize. Crossing the threshold at lower incomes is easier than most households realize.

• AGI: $62,000. 7.5% floor: $4,650.
• Total qualifying medical expenses (Publication 502): $9,800.
• Deductible above floor: $9,800 minus $4,650 = $5,150.
• Combined with $6,800 SALT and $1,200 charitable = $13,150 total itemized.
• MFJ standard deduction $29,200 still wins - itemizing does not beat it in this year.

Linnea's $5,150 of deductible medical would shine if SALT and mortgage interest pushed the itemized total above $29,200. For higher-AGI households the 7.5% floor is harder to clear - at $130,000 AGI the floor is $9,750. Paying medical expenses through an HSA achieves effective 100% deductibility regardless of the 7.5% floor and is almost always the better path when HDHP-eligible. Publication 502 lists every qualifying expense.