Medical Expense Deduction: How the 7.5% Floor Really Works

By Tom, CPA · Updated October 27, 2026

Part of: Tax Planning

TL;DR: You can deduct unreimbursed medical expenses only above 7.5% of AGI, and only if your itemized deductions beat the standard deduction. Concentrating big expenses in one year, pairing them with a low-income year, and counting long-term care premiums can help. An HSA is usually the better tool.

Educational only, not tax, legal, or investment advice. Examples are illustrations, not predictions. Rules and limits change; verify current figures and talk to a qualified professional about your situation.

The tax code is about 4 million words long, and the medical expense deduction needs only a few hundred of them. Unfortunately, the most important ones are "to the extent these expenses exceed 7.5% of your adjusted gross income." That one clause is why most people with ordinary medical bills get nothing, and why a few people with a brutal year get a meaningful deduction.

This guide covers how the floor works, what counts, how timing (yes, scheduling the knee surgery) changes the answer, the special rules for long-term care premiums, and a worked example. Figures are for 2026 as of October 27, 2026.

CPA Warning Label: Never delay medical care to chase a deduction, and never deduct an expense your HSA, FSA or insurer already paid.

How the 7.5% floor works

If you itemize on Schedule A, you can deduct unreimbursed medical and dental expenses for yourself, your spouse and your dependents only to the extent they exceed 7.5% of AGI. The floor is a permanent part of the code now, not a temporary rate that keeps getting extended, so there is no reason to expect it to change in 2027.

Two gates, then, and you have to clear both:

1. The floor gate. Expenses above 7.5% of AGI. At $80,000 of AGI, the first $6,000 is wasted.
2. The itemizing gate. The excess, plus your other itemized deductions (SALT up to $40,400, mortgage interest, charity), has to beat your standard deduction: $32,200 married filing jointly, $16,100 single and $24,150 head of household for 2026, plus extra for age 65 and older or blind.

That second gate is the one people forget. A $3,000 medical deduction is worth zero if your total itemized deductions are still below the standard deduction. The new senior deduction of up to $6,000 per person (2025 through 2028) is available whether you itemize or not, so it does not change this math.

Note the floor is based on AGI, which makes it a planning lever: anything that lowers AGI (traditional 401(k) deferrals, HSA contributions) also lowers the floor. Anything that raises AGI (a Roth conversion, a big capital gain) raises it. See AGI vs MAGI.

What counts as a medical expense

The IRS definition is broad: payments for the diagnosis, cure, mitigation, treatment or prevention of disease, or for treatments affecting any structure or function of the body. IRS Topic 502 and Publication 502 list examples, including:

• Fees for doctors, dentists, surgeons, chiropractors, psychiatrists, psychologists and certain nontraditional practitioners.
• Inpatient hospital care, and nursing home care when medical care is the main reason for being there (including meals and lodging in that case).
• Prescription drugs and insulin. Over-the-counter drugs (other than insulin) are not deductible as itemized medical expenses, even though HSAs can now pay for them.
• Acupuncture, inpatient addiction treatment, smoking-cessation programs and prescribed withdrawal drugs.
• Weight-loss programs for a specific diagnosed disease, including obesity.
• Health insurance premiums you pay with after-tax money, including Medicare Part B and Part D premiums, and qualified long-term care premiums up to age-based limits.
• Transportation for medical care, including mileage, parking and tolls, plus up to a limited amount of lodging for out-of-town care.
• Equipment and home modifications for medical reasons, to the extent they do not increase the home's value (ramps and grab bars usually qualify).

What does not count: cosmetic surgery for appearance, general health items (vitamins, gym memberships for general fitness), premiums paid pre-tax through an employer, and anything reimbursed by insurance, an HSA, an FSA or an HRA. Paying an expense from your HSA and also deducting it is double dipping, and the IRS matches Form 1099-SA data.

Bunching surgeries and other timing moves

Because the floor resets every year, concentrating expenses in one year can turn two years of nothing into one year of something. The deduction belongs to the year you pay, not the year of treatment. A charge on a credit card counts as paid on the charge date, even if you pay the card off next year.

Timing ideas that are legal and low drama:

• Elective procedures such as joint replacement, dental implants, LASIK and hearing aids can sometimes be scheduled into one calendar year. Medical judgment comes first; do not delay care for a deduction.
• Prepaying for services generally does not work if the service is not yet performed, but paying a bill for care already received in December rather than January does.
• Pair a big medical year with a low-income year. A retirement year or sabbatical year with lower AGI means a lower floor. See the year you retire.
• Pair it with other itemized deductions. A year when you also make a large charitable gift is more likely to clear the standard deduction. See itemized vs standard deduction.

The HSA alternative is usually better. If you have an HSA, paying medical costs with it gives you a tax-free withdrawal on every dollar, with no floor and no itemizing requirement. For most people the medical deduction matters only when the HSA is empty or the expenses are enormous.

Long-term care premiums and nursing home costs

Premiums for a qualified long-term care insurance contract count as medical expenses, but only up to an age-based limit per person. For 2026:

The limits are per person, so a married couple aged 65 could count up to $9,920 of premiums. Hybrid life and long-term care policies may only partly qualify; the insurer can tell you the qualified portion.

Nursing home and assisted living costs are where the deduction gets big. When the main reason for the stay is medical care, the whole cost, including meals and lodging, can count. For a chronically ill person under a plan of care prescribed by a licensed health care practitioner, qualified long-term care services also count. Families paying for a parent's care may be able to deduct those costs if the parent is their dependent, or under special rules for medical dependents. See long-term care planning and caring for aging parents.

Illustration: one bad year versus two mediocre ones

Illustration: a married couple filing jointly have AGI of $90,000 in both 2026 and 2027. Their other itemized deductions are $22,000 a year (state and property taxes plus mortgage interest). Their standard deduction is $32,200 for 2026; assume the same for 2027 to keep it simple, since 2027 figures were not yet announced as of October 2026.

Option A: spread it out. Medical costs of $9,000 in each year. The floor is 7.5% of $90,000, or $6,750. Deductible medical is $2,250 each year. Itemized total: $24,250, which is less than $32,200. They take the standard deduction both years. Medical deduction benefit: $0.

Option B: concentrate it. A planned surgery and dental work land in 2026, so they pay $18,000 in 2026 and nothing in 2027. Deductible medical in 2026: $18,000 minus $6,750 equals $11,250. Itemized total: $33,250, which beats $32,200 by $1,050. In 2027 they take the standard deduction.

Extra deduction in Option B: $1,050. In the 12% bracket that is about $126 of tax saved. That is the honest answer for many households: bunching helps, but only at the margin, unless expenses are large. If their medical bills were $40,000 in one year, the deductible portion would be $33,250 and the benefit would be much larger.

Assumptions: no HSA reimbursements, all expenses unreimbursed and paid in the year shown, 2026 standard deduction from Rev. Proc. 2025-32.

Records and common mistakes

• Keep receipts, explanations of benefits, and mileage logs. Your insurance portal's claim history is helpful but does not prove what you paid.
• Subtract reimbursements, including those received the next year. If a refund comes after you deducted the expense, it may be taxable income in the year received.
• Do not deduct premiums already paid pre-tax through payroll. Check your W-2 and pay stubs.
• Self-employed people usually deduct health insurance premiums as an above-the-line adjustment instead, which is often better because there is no floor. You cannot deduct the same premium twice.
• ACA premium tax credit recipients count only the net premium they paid after the credit.

The tax planning guide has the rest of the itemized deduction series, and the rental property insurance guide covers the different rules for rentals.