Medical Expense Deductions: What’s Qualifying and How to Track

Quick overview

Medical expense deductions reduce taxable income for eligible, unreimbursed medical and dental costs that exceed 7.5% of your adjusted gross income (AGI). These expenses are claimed when you itemize deductions on Schedule A (Form 1040), and careful tracking throughout the year is the key to maximizing the benefit.

Background and context

The U.S. tax system has allowed taxpayers to deduct certain medical costs for decades as a recognition that large out-of-pocket healthcare expenses can create financial hardship. Since the Tax Cuts and Jobs Act, the threshold for deducting medical expenses has been set at 7.5% of AGI for qualifying taxpayers; as of 2025, that remains the applicable floor (IRS Publication 502). Historically the percentage has changed, so always check the current IRS guidance. (See IRS Pub. 502 and Tax Topic 502 for official rules.)

How the deduction works (step-by-step)

1. Determine your adjusted gross income (AGI) from Form 1040.
2. Add up all qualifying, unreimbursed medical and dental expenses you paid during the tax year.
3. Multiply your AGI by 7.5% — this is your deduction floor.
4. Subtract the floor from your total qualifying expenses. Only the excess is deductible on Schedule A.
5. Decide whether itemizing (using Schedule A) produces a larger deduction than the standard deduction.

Example: Sarah

• AGI: $100,000
• Qualifying medical expenses paid: $15,000
• 7.5% of AGI = $7,500
• Deductible medical expenses = $15,000 − $7,500 = $7,500

This calculation reduces Sarah’s taxable income by $7,500 when she itemizes on Schedule A.

What qualifies as a medical expense

IRS Publication 502 gives the authoritative list, but the core categories commonly include:

• Medical and surgical fees paid to doctors, dentists, surgeons, and specialists.
• Hospital services, laboratory fees, X-rays and diagnostic testing.
• Prescription drugs and insulin (over-the-counter medicines generally do not qualify unless prescribed).
• Medical equipment and supplies — e.g., wheelchairs, crutches, hearing aids, prostheses.
• Premiums for certain health insurance plans (subject to rules), and long-term care premiums within IRS limits.
• Payments for physically necessary transportation for medical care (see mileage below).
• Costs of treatment for substance abuse and counseling related to medical conditions.

Nonqualifying examples: cosmetic surgery done solely for appearance, general health items without a medical condition, and personal hygiene products.

(See IRS Publication 502 for full details and limits.)

Medical mileage and travel

You can include unreimbursed transportation costs for medical care. The simplest method is to use the IRS’s standard medical mileage allowance (the rate changes; check the current rate on the IRS website). Alternatively, you can deduct actual out-of-pocket costs such as parking and tolls. Keep trip logs, mileage records, appointment notes and receipts to substantiate the deduction.

Who is affected and who should consider this deduction

• Taxpayers who itemize instead of taking the standard deduction.
• People with large out-of-pocket medical bills in a single year — for example, major surgery, ongoing treatment for chronic conditions, extensive dental work, or long-term care costs.
• Taxpayers with high medical expenses relative to income; families with lower AGI will reach the 7.5% threshold sooner.

Note: Certain groups, such as self-employed individuals, may benefit from additional tax rules (for example, the self-employed health insurance deduction is an adjustment to income rather than an itemized deduction). Consult IRS guidance or a tax professional for how these rules interact.

Practical tracking strategies (how I help clients in practice)

In my practice I’ve found that the taxpayers who capture the most benefit use disciplined recordkeeping and a mix of tools:

• Use a dedicated folder (digital or physical) for medical receipts and statements. Save EOBs (explanation of benefits) from insurers, pharmacy receipts, hospital bills, and cancelled checks or bank/card statements that show payment.
• Maintain a running spreadsheet or expense-tracking app with columns for date, provider, patient (if claiming dependent expenses), amount paid, reimbursement received, and net unreimbursed cost.
• Link HSA and FSA statements for expenses paid with those accounts. Even though HSA/FSA reimbursements are tax-advantaged, tracking them helps you know what expenses remain unreimbursed and therefore potentially deductible.
• Track medical mileage contemporaneously with each trip: date, purpose, destination, miles, and whether someone else drove. A simple log app or a note in your phone is usually adequate.
• For multi-year or ongoing treatments, aggregate annual totals. If you anticipate large costs next year, consider timing elective procedures to bunch deductions into a single tax year — see our piece on bunching strategies for itemized deductions.

Internal resources: See our articles on “What Are Itemized Deductions?” and “Schedule A (Itemized Deductions)” for guidance on choosing between itemizing and the standard deduction, and on how to report the deduction on your return.

• What Are Itemized Deductions? — https://finhelp.io/glossary/what-are-itemized-deductions/
• Schedule A (Itemized Deductions) — https://finhelp.io/glossary/schedule-a-itemized-deductions/
• Common Itemized Deductions People Forget to Track — https://finhelp.io/glossary/common-itemized-deductions-people-forget-to-track/

Common mistakes and how to avoid them

• Assuming every health-related outlay is deductible: Read Pub. 502 before claiming; cosmetic or general wellness expenses typically don’t qualify.
• Forgetting reimbursements: Deduct only unreimbursed costs after insurance or third-party reimbursements.
• Mixing pre-tax benefits: Expenses reimbursed through an HSA or FSA are not deductible — track both account reimbursements and out-of-pocket payments.
• Poor documentation: Lack of receipts or incomplete records is the most common audit trigger. Keep proof of payment, EOBs, prescriptions, and appointment notes.

How to claim the deduction (forms and reporting)

• Medical expense deductions are reported on Schedule A (Form 1040) under “Medical and dental expenses.” Use IRS Form 1040 instructions and Schedule A to compute and report the deduction.
• The self-employed health insurance deduction and certain premium-related deductions are reported elsewhere on Form 1040 and can affect your AGI before the medical deduction floor is calculated.

Table: Common Expenses and Qualifying Status

Frequently asked questions

Q: Do I need to itemize to claim medical expenses?
A: Yes. Medical expenses are an itemized deduction claimed on Schedule A of Form 1040. Compare itemized deductions to the standard deduction to determine which yields a greater tax benefit.

Q: Can I deduct expenses I paid for a spouse or dependent?
A: Yes. Qualifying expenses you pay for yourself, your spouse and your dependents can be included in your total medical expenses.

Q: Are health insurance premiums deductible?
A: They may be. Premiums can be part of your medical expenses on Schedule A if itemizing, but certain premiums (like those for self-employed health insurance) are handled differently and may be taken as an adjustment to income. Refer to IRS guidance for specifics.

Q: Can I deduct over-the-counter medicine?
A: Generally no, unless a prescription or other specific IRS rule makes it deductible. See IRS Pub. 502.

Audit and substantiation tips

If the IRS questions your medical deduction, it will request proof. Good substantiation includes: receipts, Explanation of Benefits (EOB) from your insurer, cancelled checks or bank statements showing payments, prescriptions, physician notes for treatments, and mileage logs. Maintain these records for at least three years from the date you file (and longer if your situation warrants).

Professional strategies I use with clients

• Evaluate whether timing an elective procedure or accelerating deductible expenses into one year will push you above the 7.5% floor (bunching).
• Combine medical expense tracking with broader itemized deduction planning — charitable gifts, mortgage interest and state taxes can all affect whether you itemize.
• Review insurance reimbursements and EOBs mid-year so you can adjust cashflows or payment timing before year-end.

Final notes and disclaimer

This article provides general, educational information and does not constitute personalized tax advice. Tax laws change and individual situations differ. For guidance tailored to your circumstances, consult a qualified tax advisor or CPA.

Authoritative sources and further reading

• IRS Publication 502, Medical and Dental Expenses: https://www.irs.gov/pub/irs-pdf/p502.pdf (primary source for qualifying expenses)
• IRS Tax Topic 502: Medical Expenses: https://www.irs.gov/taxtopics/tc502
• For deciding between itemizing or taking the standard deduction, see our glossary entry “What Are Itemized Deductions?” (linked above).

If you want, I can review a list of your expenses and recommend recordkeeping templates or a checklist tailored to your healthcare spending pattern.