What Are Itemized Deductions
Itemized deductions are a list of specific eligible expenses you can subtract from your Adjusted Gross Income instead of taking the standard deduction — you choose whichever gives you the bigger tax break.
Itemized deductions are specific qualifying expenses that you report on Schedule A of IRS Form 1040 to reduce your Adjusted Gross Income (AGI) and lower your taxable income. Instead of taking the flat standard deduction, itemizing requires documentation but can produce a larger deduction for taxpayers with significant qualifying expenses.
You may choose either the standard deduction or itemized deductions each year — you cannot use both. The right choice is whichever gives the lower tax bill, which means choosing whichever amount is larger.
Common Itemized Deductions
State and Local Taxes (SALT) You can deduct state income taxes (or sales taxes, if higher) and local property taxes, capped at a combined $10,000 per household. The $10,000 cap was introduced by the Tax Cuts and Jobs Act of 2017 and significantly reduced the benefit of itemizing for taxpayers in high-tax states.
Mortgage Interest Interest paid on a primary or secondary home mortgage is generally deductible. The deduction applies to loan balances up to $750,000 for mortgages originated after December 15, 2017 (the limit is $1 million for older loans).
Charitable Contributions Cash donations to qualifying 501(c)(3) organizations are deductible up to 60% of AGI for cash gifts. Non-cash donations (clothing, furniture, stock) follow different rules and limits. Donations must be substantiated with receipts or written acknowledgment from the charity.
Medical and Dental Expenses Only the portion of qualifying medical expenses that exceeds 7.5% of your AGI is deductible. Because of this threshold, medical costs become a meaningful deduction only for taxpayers with high out-of-pocket medical costs relative to their income.
Casualty and Theft Losses Generally limited to losses from federally declared disasters. Personal casualty losses from non-disaster events are no longer deductible for most taxpayers under current law.
Investment Interest Expense Interest paid on money borrowed to purchase taxable investments is deductible up to the amount of net investment income. Excess can be carried forward.
When Itemizing Makes Sense
| Situation | Implication |
|---|---|
| Large mortgage on expensive home | High mortgage interest may push itemized total above standard deduction |
| Living in high-tax state | State income + property taxes may reach the $10,000 SALT cap quickly |
| Significant charitable giving | Regular large donations help tip the balance |
| High out-of-pocket medical expenses | Can create a large deduction if they exceed 7.5% of AGI |
| Both apply to a married couple | Combined deductions may exceed the $30,000 married standard deduction |
AMT Interaction
Some itemized deductions are not allowed under the Alternative Minimum Tax (AMT). In particular, the SALT deduction is disallowed for AMT purposes. Taxpayers subject to AMT may see their itemized deductions partially or fully negated.
Deduction Bunching Strategy
Since itemizing only pays off when your total exceeds the standard deduction, some taxpayers use deduction bunching: concentrating two years' worth of charitable donations or other discretionary deductions into a single tax year. In the "heavy" year they itemize; in the following year they take the standard deduction. A donor-advised fund makes bunching charitable gifts especially clean — you deposit multiple years of contributions in one year, receive a full immediate deduction, and distribute donations to charities over time.
Itemized deductions are reported on Schedule A, which you attach to Form 1040. Keeping clear records and receipts throughout the year is essential to support your claims if the IRS questions your return.