How to File Medical Expenses on Your Tax Return: Schedule A

To file medical expenses on Schedule A, add up every qualifying out-of-pocket cost you paid during the tax year, subtract 7.5% of your adjusted gross income, and report the remainder on lines 1 through 4 of Schedule A (Form 1040). The deduction only helps if your total itemized deductions exceed the standard deduction for your filing status, which for 2026 is $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for heads of household.¹ In a heavy medical year, the numbers can work; in an average one, they usually don’t.

The Four Lines on Schedule A

The medical deduction takes up the first four lines of Schedule A, and the math is the same every year:²

Line 1. Total qualifying medical and dental expenses you paid during the year. Exclude anything reimbursed by insurance or paid from an HSA, FSA, HRA, or Archer MSA.
Line 2. Your AGI from Form 1040, line 11b.
Line 3. Line 2 multiplied by 0.075. This is your floor.
Line 4. Line 1 minus Line 3. Zero or negative means no deduction. A positive figure is what you can deduct.

Line 4 then combines with your other itemized deductions on Schedule A — state and local taxes, mortgage interest, charitable contributions, and the rest. The Schedule A total moves to Form 1040, line 12e. Itemizing only makes sense if that total beats your standard deduction.¹

A concrete run-through. A married couple filing jointly with an AGI of $80,000 pays $12,000 in unreimbursed medical bills during the year. Line 3 is $6,000 (7.5% of $80,000). Line 4 is $6,000. That $6,000 helps them only if, combined with their other Schedule A items, the total exceeds the $32,200 standard deduction. In a high-medical year, that often clears.

What Counts as a Qualifying Medical Expense

The tax code defines medical care as amounts paid to diagnose, treat, prevent, or manage a disease, or to affect a structure or function of the body.³ That definition sweeps in more than most people put on Line 1:

Payments to physicians, surgeons, dentists, psychologists, psychiatrists, chiropractors, and other licensed practitioners.
Prescription drugs and insulin. Over-the-counter drugs bought without a prescription do not count.³
Eyeglasses, contact lenses, hearing aids, wheelchairs, crutches, and prosthetics.⁴
Routine physicals, screenings, and vaccinations.
Dental cleanings, fillings, crowns, dentures, braces, and oral surgery.
Buying, training, and maintaining a guide dog or other service animal, including food and veterinary care.⁴

Nursing home costs, including meals and lodging, are fully deductible when the principal reason for being there is medical care. If the stay is mainly for personal reasons, only the portion attributable to medical or nursing care qualifies. Qualified long-term care services are deductible when a licensed health care practitioner certifies the patient as chronically ill.⁵

Weight-loss programs qualify only when a physician has diagnosed a specific disease such as obesity, heart disease, or hypertension and directed weight loss as treatment. Program fees count; diet food generally doesn’t. Smoking cessation programs and prescribed nicotine-withdrawal drugs qualify, but over-the-counter patches and gum do not.

Whose Expenses You Can Include

You can deduct qualifying costs paid for yourself, your spouse, and your dependents.⁴ The definition of “dependent” for medical purposes is broader than the standard rule. A relative who earned too much to be your dependent on the rest of the return can still count here, as long as you provided more than half their support and they meet the relationship and residency tests.³

For divorced or separated parents, each parent can deduct medical expenses they personally paid for a child, regardless of which parent claims the child as a dependent.³ The rule is that you deduct what you actually paid, not what someone else covered.

Premiums, Travel, and Home Modifications

Health insurance premiums count when you pay them with after-tax dollars. Employer-paid premiums and pre-tax premiums run through a cafeteria plan are already tax-free and cannot be deducted again. Only premiums included in Box 1 of your W-2 are eligible.⁴

Medicare premiums are commonly missed. Medicare Part B ($206.50 per month for most enrollees in 2026) and Medicare Part D prescription drug premiums both qualify. Premiums for a supplemental policy covering medical care also count, provided the medical portion is separately stated.⁵

Travel to and from care is deductible. You can use actual gas and toll costs, or the IRS medical mileage rate of 20.5 cents per mile for 2026.⁶ Bus fare, train tickets, taxi and rideshare costs, and parking at the hospital or clinic also qualify. When treatment requires travel away from home, lodging is deductible up to $50 per night per person, or up to $100 per night total when a parent accompanies a child. The lodging cannot be lavish, and the trip must be primarily for and essential to the medical care. Meals during medical travel do not qualify.⁵

Permanent home improvements made for medical reasons can be deductible, but the amount depends on whether the change increases the home’s market value. Modifications that don’t raise value — which covers most disability-related changes — are fully deductible. Improvements that do add value are deductible only for the portion of the cost above the value added.⁵ The IRS generally treats these as fully deductible:

Entrance and exit ramps
Widened doorways and modified hallways
Railings, support bars, and grab bars
Lowered kitchen cabinets and equipment
Relocated electrical outlets and fixtures
Porch lifts (elevators generally add value)
Modified fire alarms, smoke detectors, and warning systems
Modified stairways and graded ground for access

Operating costs for medically necessary equipment, such as the electricity for a stair lift, also qualify. Only reasonable costs count; aesthetic upgrades don’t.⁵

What Doesn’t Qualify

Cosmetic surgery is the biggest exclusion. Any procedure that improves appearance without meaningfully treating a disease or affecting a body function fails the test. Face lifts, hair transplants, electrolysis, and liposuction are out.³ Cosmetic procedures correcting a deformity caused by a congenital abnormality, an accidental injury, or a disfiguring disease are the exception.

Other common non-qualifiers: gym memberships and general fitness programs (even when a doctor recommends exercise), teeth whitening, non-prescription drugs, funeral expenses, and anything reimbursed by insurance or paid by someone else.⁴ That last rule catches people. If insurance covered 80% of a hospital bill, only the 20% you paid goes on Line 1.

The same double-benefit rule applies to tax-advantaged accounts. Expenses paid or reimbursed through an HSA, FSA, HRA, or Archer MSA cannot be deducted, because withdrawals from those accounts are already tax-free.⁵ If your out-of-pocket costs exceeded what the account covered, the after-tax portion you paid yourself can still go on Schedule A. Track which dollars came from which source.

Records to Keep

Line 1 needs to be defensible. Throughout the year, hold onto receipts, invoices, and billing statements from providers and pharmacies. Credit card and bank statements back them up. For mileage, keep a log with the date, destination, medical purpose, and round-trip distance. A spreadsheet or phone app is fine; the IRS doesn’t require a specific format, just contemporaneous records.

Keep everything for at least three years from the date you file, the general audit window.⁷ Underreporting income by more than 25% extends the window to six years, so longer retention is safer. Organized records prevent the ordinary problem: a lost receipt or a miscategorized expense knocking dollars off a deduction you were entitled to.

1
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
2
Internal Revenue Service. Schedule A (Form 1040)
3
Office of the Law Revision Counsel. 26 USC 213 – Medical, Dental, Etc., Expenses
4
Internal Revenue Service. Topic No. 502, Medical and Dental Expenses
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Internal Revenue Service. Publication 502 – Medical and Dental Expenses
6
Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents per Mile, Up 2.5 Cents
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Internal Revenue Service. Topic No. 305, Recordkeeping