What itemized deductions are and how they differ from the standard deduction

An itemized deduction is a specific expense you paid during the year that the IRS allows you to subtract from your income before calculating what you owe in taxes. Instead of taking a flat standard deduction — a fixed dollar amount that depends on your filing status — you list out individual expenses and add them up. If your total itemized deductions are larger than the standard deduction for your situation, itemizing saves you money.

The standard deduction for 2024 is $14,600 if you file as single, $29,200 if you file as married filing jointly, and $21,900 if you file as head of household. These amounts change each year. When you itemize, you're saying "I want to subtract these specific expenses instead of taking that flat amount." The IRS requires you to choose one or the other — you cannot take both.

Most people take the standard deduction because it's simpler and because their actual expenses don't add up to more than the standard amount. But if you own a home, paid significant medical bills, made large charitable donations, or live in a state with high income taxes, itemizing might reduce your tax bill further.

Key Takeaways

  • Itemized deductions let you subtract specific expenses from your income, but only if the total is larger than your standard deduction for the year.
  • Common itemized deductions include mortgage interest, property taxes, state and local income taxes (capped at $10,000), charitable donations, and unreimbursed medical expenses above 7.5% of your income.
  • You report itemized deductions on Schedule A, which you attach to your Form 1040 when you file your tax return.
  • The IRS limits or disallows some deductions — for example, you can only deduct the portion of medical expenses that exceeds 7.5% of your adjusted gross income.

Common expenses you can itemize

The most common itemized deduction for homeowners is mortgage interest — the interest portion of your monthly mortgage payment, not the principal. You can deduct interest on mortgages up to $750,000 of the home's purchase price. If you took out a mortgage before December 16, 2017, the limit is $1,000,000. You receive a Form 1098 from your lender each January showing how much interest you paid the previous year.

Property taxes on your home and land are deductible, along with state and local income taxes or sales taxes. However, the total of all state and local taxes (called the SALT deduction) is capped at $10,000 per year, regardless of how much you actually paid. This cap applies whether you're married filing jointly or single.

Charitable donations to may have access to organizations — religious institutions, nonprofits, schools, and similar groups — are deductible. You need receipts or written acknowledgment from the organization, especially for donations over $250. Donations of clothing, household items, or vehicles are deductible at fair market value, but you must itemize to claim them.

Medical and dental expenses are deductible, but only the amount that exceeds 7.5% of your adjusted gross income (AGI). If your AGI is $60,000 and you paid $6,000 in medical bills, you can only deduct $1,500 (the amount over $4,500). This threshold makes medical deductions available mainly to people with very high medical costs or lower incomes.

Expenses the IRS does not allow you to itemize

The IRS does not allow deductions for personal expenses, even if you paid them out of pocket. You cannot deduct groceries, gas, car insurance, utilities, clothing, or entertainment. You also cannot deduct the cost of commuting to work, even if you drive a long distance.

Some business-related expenses are off-limits too. If you're an employee (not self-employed), you cannot deduct work uniforms, professional dues, or job-hunting expenses. Self-employed people use a different form (Schedule C) to report business income and expenses, not itemized deductions.

Gambling losses, fines, and penalties are not deductible. Neither are life insurance premiums, tuition for your own education (though education credits exist as a separate benefit), or most legal fees. Homeowners cannot deduct general home maintenance or repairs — only improvements that add value to the home and have a useful life of more than one year.

How to decide whether to itemize or take the standard deduction

The decision is straightforward: add up all the expenses you think you can deduct. If the total is more than your standard deduction, itemize. If it's less, take the standard deduction. You do not need to choose until you file your return, so you can calculate both ways.

A worksheet or tax software can help you track this. Many people use a straightforward spreadsheet: list mortgage interest, property taxes, charitable donations, and medical expenses in separate rows, add them up, and compare the total to the standard deduction for your filing status. If you're close to the standard deduction amount, consider whether you made any donations late in the year that you could move into the current year, or whether you can bunch donations into one year to push over the threshold.

If you're married filing jointly and one spouse has significant deductible expenses while the other does not, you still file one return and use one method — you cannot split the deduction between itemizing and standard.

How to report itemized deductions on your tax return

You report itemized deductions on Schedule A, a form you attach to your Form 1040. Schedule A has separate sections for different types of deductions: medical expenses, taxes paid, interest paid, gifts to charity, and casualty losses. You fill in the amounts for each category, add them up, and enter the total on your Form 1040.

If you use tax software, the program usually walks you through Schedule A line by line and calculates the total for you. If you file by hand, you can read Schedule A from the IRS website (irs.gov) along with the instructions, which explain what goes in each section and what documentation you need to keep.

Keep receipts, bank statements, and written acknowledgments from charities for at least three years. The IRS can ask for proof of any deduction you claim, and having documentation protects you if your return is audited.

Limits and phase-outs that affect itemized deductions

Some deductions shrink or disappear if your income is above a certain level. Medical expenses, for example, are only deductible to the extent they exceed 7.5% of your AGI — a threshold that makes the deduction unavailable to most people unless they have catastrophic medical costs.

Charitable donations have no income limit, but you cannot deduct more than a percentage of your AGI in any single year. For cash donations, the limit is usually 50% of AGI; for donations of appreciated property, it's 30%. If you donate more than the limit allows, you can carry the excess forward to future years.

The $10,000 cap on state and local taxes applies to everyone, regardless of income. This means high-income earners in states with steep income taxes may find that itemizing no longer saves them money, even though they pay more in taxes overall.

Frequently Asked Questions

Can I deduct my home office if I work from home?

If you're self-employed, yes — you report home office expenses on Schedule C, not as itemized deductions. If you're an employee, no — the deduction for employee home offices was suspended after 2017. You can only claim a home office deduction if you're self-employed or own a business.

What counts as a charitable donation?

Donations to religious institutions, nonprofits, schools, hospitals, and government agencies count. Political donations, donations to individuals, and donations to candidates do not. The organization must be registered with the IRS as a may have access to charity. You can search the IRS Tax Exempt Organization Search tool on irs.gov to verify an organization's status before donating.

Do I need receipts for every charitable donation?

For donations under $250, a bank record or receipt from the organization is enough. For donations of $250 or more, you need a written acknowledgment from the charity stating the amount and whether you received anything in return. For donations of property (clothing, furniture, vehicles), you need a receipt and a Form 8283 if the total value exceeds $500.

Can I deduct student loan interest?

Student loan interest is not an itemized deduction — it's a separate deduction you can claim whether or not you itemize. You can deduct up to $2,500 of student loan interest paid during the year on Form 1040, as long as your income is below the phase-out threshold (which varies by filing status). This deduction is available in addition to the standard deduction.

What if I'm not sure whether an expense is deductible?

The IRS website (irs.gov) has a searchable publication library. Publication 17 covers itemized deductions in detail. You can also call the IRS at 1-800-829-1040 during business hours, or consult a tax professional if your situation is complex.