The basic calculation: what you can deduct and how much it's worth
You can deduct medical expenses only if they exceed 7.5% of your adjusted gross income (AGI) for the tax year. This means you subtract 7.5% of your AGI from your total medical expenses, and only the amount above that threshold becomes a deduction.
Here's the concrete math: if your AGI is $60,000, the threshold is $4,500 (60,000 × 0.075). If you spent $8,000 on medical expenses, you can deduct $3,500 ($8,000 − $4,500). If you spent $4,200, you cannot deduct anything because it falls below the threshold.
The deduction reduces your taxable income, which then reduces the tax you owe. The actual refund amount depends on your tax bracket. A $3,500 deduction at a 22% tax rate saves you $770 in taxes; at a 12% rate, it saves $420.
Key Takeaways
- Medical expenses must exceed 7.5% of your adjusted gross income before any deduction is possible.
- Only expenses you paid out of pocket count — insurance premiums you paid yourself, copays, prescriptions, and certain equipment may have access to, but insurance reimbursements do not.
- You must itemize deductions on Schedule A to claim medical expenses; the standard deduction is usually larger, so most taxpayers cannot use this deduction.
- Keep receipts and invoices for every expense you claim, because the IRS requests documentation during audits.
- Your tax software or preparer can calculate the exact refund impact once you enter your AGI and total medical expenses.
What counts as a medical expense you can deduct
The IRS has a specific list. may have access to expenses include insurance premiums you paid (health, dental, vision, and long-term care), copays and coinsurance, prescription medications, medical equipment (crutches, wheelchairs, hearing aids), and procedures not covered by insurance. Therapy, surgery, hospital stays, and diagnostic tests all count if you paid for them yourself.
What does not count: cosmetic procedures, over-the-counter medications (with rare exceptions for insulin), gym memberships, vitamins, and expenses reimbursed by insurance or an employer health savings account. If your insurance paid for it, you cannot deduct it again. If your employer paid through a flexible spending account (FSA) or health savings account (HSA), that money came out pre-tax, so you cannot deduct it a second time.
Travel to receive medical care can count — mileage to doctor appointments, flights for treatment at a specialty center — but only the transportation itself, not meals or lodging unless they are part of a hospital stay.
The threshold problem: why most people cannot use this deduction
The 7.5% threshold is the real barrier. For a household with a $100,000 AGI, you need $7,500 in medical expenses before you can deduct anything. For a $50,000 AGI, you need $3,750. Most years, most people do not reach that number.
This is why medical deductions matter mainly to people with chronic conditions, major procedures, or high insurance premiums. Someone paying $300 a month in health insurance premiums ($3,600 a year) plus copays and prescriptions might reach the threshold. Someone with routine care and employer-paid insurance almost certainly will not.
You also must itemize deductions to claim medical expenses. The standard deduction for 2024 is $14,600 for single filers and $29,200 for married filing jointly. Unless your total itemized deductions (medical expenses plus state and local taxes, mortgage interest, and charitable donations) exceed the standard deduction, you get no benefit from the medical deduction at all.
Step-by-step: gathering and organizing your expenses
Start by collecting every receipt, invoice, and explanation of benefits (EOB) from your insurance company for the tax year. Organize them by category: insurance premiums, copays, prescriptions, equipment, procedures, and travel.
For insurance premiums, use the 1098-T form (for education-related health coverage) or statements from your insurance company showing what you paid out of pocket. Do not include employer-paid premiums — only money that came from your own pocket.
For prescriptions and over-the-counter items, keep the receipt showing the date, item, and amount. For medical equipment, keep the invoice and any documentation showing it was prescribed by a doctor. For procedures, keep the bill from the provider and any insurance EOB showing what you paid versus what insurance covered.
Add up each category, then add all categories together to get your total medical expenses for the year. This is the number you will use in the calculation.
Calculating the deduction: the actual numbers
Once you have your total medical expenses and your AGI, the math is straightforward.
| Step | Action | Example |
|---|---|---|
| 1 | Find your AGI from your tax return or tax software | $75,000 |
| 2 | Multiply AGI by 0.075 (7.5%) | $75,000 × 0.075 = $5,625 |
| 3 | Add up all your medical expenses | $9,200 |
| 4 | Subtract the threshold from total expenses | $9,200 − $5,625 = $3,575 |
| 5 | This is your deductible amount (if positive) | $3,575 deduction |
If the result in step 4 is zero or negative, you have no deduction for that year. If it is positive, that amount reduces your taxable income — but only if you itemize deductions and only if your total itemized deductions exceed the standard deduction.
Converting the deduction to actual tax savings
A deduction is not the same as a refund. A $3,575 deduction reduces your taxable income by $3,575. The tax savings depend on your tax bracket.
If you are in the 22% federal tax bracket, a $3,575 deduction saves you $786.50 in federal taxes. At 12%, it saves $429. At 32%, it saves $1,144. Your tax software will calculate this automatically when you enter the deduction.
Some states also allow medical expense deductions, which would add additional savings. A few states do not, so check your state's rules.
The refund you receive depends on whether you overpaid taxes throughout the year (through withholding or estimated payments). The medical deduction reduces what you owe, which can increase your refund if you overpaid, or reduce the amount you owe if you underpaid.
Documentation: what to keep and for how long
Keep every receipt, invoice, and EOB for at least three years. The IRS can audit a return up to three years after you file, and they will request documentation for any medical expenses you claimed. If you cannot produce the receipt, the IRS will disallow the deduction.
For major procedures or equipment, keep the documentation longer — seven years is standard practice. If the IRS questions whether an expense was medically necessary, you may need a letter from your doctor explaining why it was prescribed.
Organize your records by year and category. A straightforward spreadsheet or folder system works: one folder per tax year, subdivided by expense type. When you file, you do not submit receipts with your return, but you must have them available if asked.
Frequently Asked Questions
Can I deduct medical expenses my spouse paid if we file jointly?
Yes. If you file a joint return, you combine both spouses' medical expenses and use the joint AGI to calculate the threshold. This often helps couples reach the 7.5% threshold when neither spouse alone would.
What if I paid medical expenses in 2024 but did not receive the bill until 2025?
Deduct it in the year you paid, not the year you received the bill. The IRS uses the cash method for medical expenses — the year you actually spent the money is what matters.
Does my HSA or FSA reduce the medical expenses I can deduct?
Yes. Any expense paid through an HSA or FSA cannot be deducted again. Those accounts already gave you a tax break when the money went in, so you cannot claim the same expense twice.
If I do not reach the 7.5% threshold, can I carry the expenses forward to next year?
No. Medical expenses must be deducted in the year you paid them. Unused expenses do not carry forward or back.
Will claiming medical expenses trigger an audit?
Not automatically. Audits are random or based on other factors. But if you claim medical expenses, keep your documentation ready. The IRS does request receipts for medical deductions more often than for other itemized deductions.