Itemizing deductions means listing your actual qualifying expenses on Schedule A of your federal tax return instead of taking the flat standard deduction the IRS offers everyone. For the 2026 tax year, the standard deduction is $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for heads of household.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 If your deductible expenses add up to more than those amounts, itemizing lowers your taxable income by more and saves you money. If they don’t, the standard deduction wins.
How to Decide Between Itemizing and the Standard Deduction
The math is straightforward. Add up everything you’re allowed to deduct, then compare that total to your standard deduction. Use the larger number. Most filers end up with the standard deduction, but people who own a home with a sizable mortgage, pay high state and local taxes, give generously to charity, or had steep medical bills often clear the bar.
Run this comparison every year. A year in which you buy a house, have major surgery, or make a large charitable gift can flip the answer even if you’ve taken the standard deduction for a decade. Filers 65 or older get an additional standard deduction on top of the base amount, which raises the total you’d need to exceed.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
What Counts as an Itemized Deduction
Schedule A groups deductible expenses into categories, each with its own limits. The four that matter for most people are state and local taxes, mortgage interest, charitable gifts, and medical costs.
State and Local Taxes (SALT)
You can deduct state and local income taxes (or general sales taxes, but not both), plus property taxes. Under the One Big Beautiful Bill Act, the combined SALT cap rose to $40,000 for 2025 and 2026, up from $10,000. Married taxpayers filing separately face a $20,000 cap.2Internal Revenue Service. 2025 Instructions for Schedule A (Form 1040) The higher cap begins to shrink once your modified adjusted gross income exceeds $500,000 ($250,000 for married filing separately), and it eventually drops back toward $10,000 for the highest earners. Starting in 2030, the cap is scheduled to revert to $10,000 for everyone.3Bipartisan Policy Center. SALT Deduction Changes in the One Big Beautiful Bill Act
Home Mortgage Interest
Interest on a mortgage used to buy, build, or substantially improve your home is deductible on up to $750,000 of loan principal ($375,000 if married filing separately). That limit, set by the 2017 Tax Cuts and Jobs Act, was made permanent by the One Big Beautiful Bill Act.4Internal Revenue Service. Publication 936 (2025), Home Mortgage Interest Deduction If you took out your mortgage before December 16, 2017, the older $1 million cap still applies to that debt. Your lender sends Form 1098 each year showing the interest and points you paid.5Internal Revenue Service. Instructions for Form 1098 (12/2026)
Charitable Contributions
Cash donations to qualifying public charities are deductible up to 60% of your adjusted gross income. Gifts to private foundations and certain other organizations have a 30% ceiling. Non-cash gifts, like clothing or stock, follow their own percentage limits depending on the property and the recipient.6Office of the Law Revision Counsel. 26 USC 170 – Charitable, Etc., Contributions and Gifts
For any single cash gift of $250 or more, you need a written acknowledgment from the organization stating the amount and whether you received anything in return. Smaller cash gifts still need a bank record or receipt.6Office of the Law Revision Counsel. 26 USC 170 – Charitable, Etc., Contributions and Gifts Non-cash donations worth more than $5,000 require a qualified appraisal and Form 8283 attached to your return. Art valued at $20,000 or more must include the full appraisal with the filing.7Internal Revenue Service. Publication 561 (12/2025), Determining the Value of Donated Property
Medical and Dental Expenses
You can deduct unreimbursed medical and dental costs, but only the portion above 7.5% of your adjusted gross income. If your AGI is $80,000 and you paid $9,000 in qualifying medical expenses, only $3,000 is deductible (the amount over the $6,000 threshold). Qualifying costs include treatment, prescription medications, medical equipment, and transportation to get care.8Office of the Law Revision Counsel. 26 USC 213 – Medical, Dental, Etc., Expenses
That 7.5% floor is why this deduction tends to matter only in years involving surgery, extended treatment, or major dental work. Routine copays rarely push anyone over the line.
Casualty and Theft Losses
Personal casualty and theft losses are deductible only if they result from a federally declared disaster. This restriction, in place since 2018, was made permanent by the One Big Beautiful Bill Act. You report the loss on Form 4684 and carry the deductible portion to Schedule A.9Internal Revenue Service. Publication 547 (2025), Casualties, Disasters, and Thefts One narrow exception: if you have personal casualty gains in the same year, you can offset those gains with casualty losses even outside a declared disaster area.10Internal Revenue Service. Instructions for Form 4684 (2025)
Gambling Losses and Investment Interest
Gambling losses are deductible only up to the amount of gambling winnings you report as income for the same year. You cannot use them to create a net loss.11Internal Revenue Service. Topic No. 419, Gambling Income and Losses Investment interest, meaning interest paid on money borrowed to buy taxable investments, is deductible on Schedule A up to the amount of your net investment income for the year.12Internal Revenue Service. Topic No. 505, Interest Expense
What You Can’t Deduct
A few common expenses trip filers up every year. Miscellaneous itemized deductions, including unreimbursed employee expenses and tax preparation fees, were suspended by the Tax Cuts and Jobs Act in 2018 and made permanently non-deductible by the One Big Beautiful Bill Act.13Office of the Law Revision Counsel. 26 USC 67 – 2-Percent Floor on Miscellaneous Itemized Deductions
On the medical side, the IRS specifically excludes cosmetic surgery (unless it corrects a deformity from disease, injury, or a congenital condition), health club memberships, and general fitness programs even if a doctor recommends them. Life insurance premiums don’t qualify. Commuting costs, even if a medical condition forces you to use a different mode of transportation, aren’t medical expenses. Neither is the cost of food or beverages that replace normal meals on a prescribed diet.14Internal Revenue Service. Publication 502 (2025), Medical and Dental Expenses
When You’re Required to Itemize
Most people choose freely between itemizing and the standard deduction, but two situations remove the choice. If you’re married filing separately and your spouse itemizes, you must itemize too, even if your deductions are minimal.15Internal Revenue Service. Itemized Deductions, Standard Deduction Nonresident aliens filing a U.S. return generally cannot claim the standard deduction and must itemize any deductions they’re entitled to.16Internal Revenue Service. Nonresident – Figuring Your Tax
Records You Need to Keep
Every deduction you claim needs backup. The IRS won’t ask for receipts when you file, but if they audit later, the burden of proof falls on you. Organizing records as the year goes is far easier than reconstructing them.
Form 1098 from your lender covers mortgage interest.17Internal Revenue Service. About Form 1098, Mortgage Interest Statement For charitable gifts, you need a bank record or written receipt for every cash donation, plus a written acknowledgment letter for any single gift of $250 or more stating the amount and whether you received goods or services in return.6Office of the Law Revision Counsel. 26 USC 170 – Charitable, Etc., Contributions and Gifts For medical expenses, hold on to invoices, explanation-of-benefits statements, and records of out-of-pocket payments. State and local tax deductions are typically documented by W-2s, property tax statements, and records of estimated payments.
Electronic records are acceptable if they’re legible on screen and when printed, and if your storage system prevents unauthorized changes.18Internal Revenue Service. Revenue Procedure 97-22 Scanning receipts to cloud storage meets the standard for most filers. Keep records at least three years after filing, which is the IRS’s usual audit window. Substantial errors extend that window to six years.19Internal Revenue Service. IRS Audits
How Schedule A Fits on Your Return
You report itemized deductions on Schedule A, which attaches to Form 1040. The form walks through each category in order: medical, taxes, interest, charity, casualty, other. Enter the total for each, and the form produces a final sum that transfers to your main return in place of the standard deduction.2Internal Revenue Service. 2025 Instructions for Schedule A (Form 1040) Tax software handles the calculation and automatically picks whichever option saves you more.
When Itemizing Saves Less Than It Looks
Two rules can quietly reduce the benefit of a large Schedule A. The alternative minimum tax runs a parallel calculation that strips away certain deductions, including the SALT deduction entirely, and applies its own rates. For 2026, the AMT exemption is $90,100 for unmarried filers and $140,200 for married couples filing jointly, with phase-outs starting at $500,000 and $1,000,000 of income.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
The One Big Beautiful Bill Act also introduced a new limitation for top-bracket filers. If your taxable income reaches the 37% rate (above $640,600 for single filers or $768,700 for joint filers in 2026), a formula reduces the tax benefit of your itemized deductions.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Neither rule reaches most filers. But if you’re in the income range where large SALT deductions and the AMT overlap, the actual savings from itemizing can be meaningfully smaller than the Schedule A total suggests, and running both calculations before you file is the only way to see the real number.