Fill Out IRS Schedule A (Form 1040) Online
Itemized Deductions
Internal Revenue Service
Itemizes deductions such as mortgage interest, state and local taxes, and charitable contributions instead of taking the standard deduction.
Reviewed July 2026
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Schedule A (Form 1040), Itemized Deductions, is the attachment taxpayers use when they choose to itemize instead of taking the standard deduction. It totals deductible expenses such as medical costs, state and local taxes, home mortgage interest, charitable contributions, and casualty losses from federally declared disasters.
You can complete Schedule A in the Universal PDF editor from any device. Enter each expense category, let the form guide your math line by line, and download the finished PDF to keep with your return.
What is Schedule A used for
Every filer can subtract either the standard deduction or the total of their itemized deductions from adjusted gross income. Schedule A is where itemized deductions are listed and totaled, so you can compare that total to your standard deduction and take whichever is larger.
- Medical and dental expenses above the percentage-of-income floor described in the official instructions
- State and local income or sales taxes, real estate taxes, and personal property taxes, subject to the overall cap in the instructions
- Home mortgage interest and points reported on Form 1098, within the loan limits in the instructions
- Gifts to qualified charities, in cash or property, with documentation rules that vary by amount and type
- Casualty and theft losses attributable to federally declared disasters
- Certain other itemized deductions listed in the instructions
Who needs to file Schedule A
File Schedule A only if you itemize. Itemizing tends to make sense for homeowners with significant mortgage interest and property taxes, taxpayers with large charitable contributions, or households with major unreimbursed medical expenses. If your itemized total is below your standard deduction, skipping Schedule A usually gives the better result.
Some taxpayers must itemize regardless, for example a married person filing separately whose spouse itemizes. The Form 1040 instructions list these situations.
How to fill out Schedule A
Gather your records first: Form 1098 from your mortgage servicer, property tax statements, charity receipts, and medical expense totals. Then work down the schedule section by section.
- Medical and dental: enter total expenses, then subtract the adjusted gross income floor calculated on the form
- Taxes you paid: choose between deducting state income taxes or state sales taxes, then add real estate and personal property taxes, applying the overall limit from the instructions
- Interest you paid: enter mortgage interest and points from Form 1098, plus any investment interest from Form 4952
- Gifts to charity: separate cash gifts from property gifts, and attach Form 8283 if your noncash gifts exceed the threshold in the instructions
- Total everything on the final line and carry it to Form 1040 in place of the standard deduction
Frequently asked questions
Compare your Schedule A total to the standard deduction for your filing status and take the larger amount. Many filers only benefit from itemizing when they have mortgage interest, sizable state and local taxes, or large charitable gifts. A tax professional can help with borderline cases.
Yes. The deduction for combined state and local taxes is capped. Check the current Schedule A instructions for the limit that applies to your filing status and tax year.
Only the portion of unreimbursed medical and dental expenses that exceeds the percentage-of-income floor in the instructions is deductible, so smaller amounts often produce no deduction.
Yes. Cash gifts need a bank record or written acknowledgment, and larger gifts have stricter substantiation rules, including Form 8283 for noncash gifts above the threshold in the instructions.
Sometimes. Renters do not have mortgage interest or property tax, but large medical expenses, state taxes, and charitable giving can still push itemized deductions above the standard deduction in some cases.
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