Standard Deduction vs Itemizing: How to Know Which One to Use

When you file your federal income tax return, you get to reduce your taxable income by the larger of two options: the standard deduction or your itemized deductions. Choosing the right one is one of the most straightforward ways to lower your tax bill, and it only requires one comparison.

For most Americans, the answer has become simpler since 2018, when the Tax Cuts and Jobs Act nearly doubled the standard deduction. But itemizing still wins for a specific set of taxpayers, and knowing whether you are one of them matters.

What Is the Standard Deduction?

The standard deduction is a flat dollar amount the IRS lets every taxpayer subtract from their gross income before calculating the tax they owe. You do not need receipts, documentation, or any particular expenses to claim it. You simply take it.

For 2026, the standard deduction amounts are:

Source: IRS Rev. Proc. 2025-28.

Additional standard deduction amounts are available if you are 65 or older or blind:

• Single or head of household: add $2,000 per qualifying condition
• Married (either spouse): add $1,600 per qualifying condition per spouse

So a single person who is 65 or older has a standard deduction of $17,000 in 2026.

What Are Itemized Deductions?

Itemizing means listing out your specific eligible expenses and deducting the total instead of taking the flat standard deduction. You report these on Schedule A when you file your return.

The major itemized deductions available to most taxpayers:

Mortgage interest: Interest paid on a mortgage secured by your primary or secondary home, up to $750,000 in loan principal (for loans originated after December 15, 2017). This is often the single largest itemized deduction available to homeowners.

State and local taxes (SALT): This includes state income tax (or sales tax if your state has no income tax) plus property taxes. The deduction is capped at $10,000 per return ($5,000 if married filing separately). This cap, introduced in 2018, eliminated much of the benefit of itemizing for people in high-tax states.

Charitable contributions: Cash donations to qualifying organizations (up to 60% of your adjusted gross income), plus the fair market value of donated property. Donations must be to IRS-recognized nonprofits and should be documented.

Medical and dental expenses: Only the amount that exceeds 7.5% of your adjusted gross income (AGI) is deductible. If your AGI is $70,000, only medical expenses above $5,250 are deductible. This threshold makes it beneficial only for people with very high medical costs relative to their income.

Casualty and theft losses: Currently limited to federally declared disaster losses only, not everyday theft or accidents.

Home mortgage points: Points paid to obtain a mortgage are generally deductible in the year paid for a primary home purchase.

The Simple Rule: Take Whichever Is Larger

Your decision is purely mathematical: if your total itemized deductions exceed your standard deduction, itemize. If they do not, take the standard deduction.

The standard deduction represents the floor. The IRS is effectively saying: "We will let you deduct at least $15,000 (for single filers) without documentation." If your actual eligible expenses add up to less than that, there is nothing to gain from itemizing.

Who Should Itemize in 2026?

The high standard deduction means most Americans benefit from taking it. According to IRS data, approximately 90% of filers took the standard deduction in recent years after the 2018 reform. That said, itemizing genuinely makes sense for taxpayers with:

Significant mortgage interest. A $500,000 mortgage at 7% generates roughly $34,500 in interest in year one. Combined with the $10,000 SALT cap and charitable giving, total itemized deductions could easily exceed $30,000 for a married couple, beating the standard deduction.

Large property tax bills plus state income tax. Even capped at $10,000, the SALT deduction contributes meaningfully when combined with other deductions.

Substantial charitable giving. Someone who donates $15,000 or more to qualifying organizations per year gets meaningful benefit from itemizing, especially combined with other deductions.

High unreimbursed medical expenses. A year with major medical costs that exceed 7.5% of AGI by a significant amount can tip the balance toward itemizing.

Multiple deduction categories together. The key is that these do not work in isolation. You need several categories to add up to more than your standard deduction. One large expense rarely crosses the threshold alone.

Working Through an Example

Scenario: Married couple, filing jointly, $180,000 gross income

They have:

• Mortgage on a $600,000 home at 6.8%: approximately $40,000 in interest in year one
• Property taxes: $8,500
• State income taxes: $6,200 (would be capped at $10,000 combined with property taxes)
• Charitable donations: $4,000
• Medical expenses: $3,500 (AGI floor = $180,000 x 7.5% = $13,500; $3,500 does not exceed it)

Total itemized deductions:

• Mortgage interest: $40,000
• SALT (capped): $10,000
• Charitable: $4,000
• Medical: $0 (below threshold)
• Total: $54,000

Standard deduction for married filing jointly: $30,000

Result: Itemize and save taxes on an extra $24,000 of deductions.

At a 22% marginal rate, that $24,000 difference saves them approximately $5,280 in federal taxes compared to taking the standard deduction.

Counter-scenario: Same couple, smaller mortgage

If they instead rented (no mortgage interest), had $6,000 in property taxes and state income taxes, and donated $2,000:

• SALT: $6,000 (below the cap, so full amount)
• Charitable: $2,000
• Total: $8,000

Standard deduction: $30,000.

Take the standard deduction. Itemizing would leave $22,000 more of their income taxable.

Comparison Table: Standard vs Itemized

Can You Split Between the Two?

No. You choose one or the other. And if you are married filing separately, both spouses must use the same method. If one spouse itemizes, the other must itemize too (even if their itemized deductions are less than the standard deduction, resulting in a worse outcome for them).

Common Deductible Expenses People Miss When Itemizing

If you are close to the threshold and considering whether to itemize, these are commonly overlooked:

Investment interest expense: Interest paid on money borrowed to buy taxable investments is deductible up to the amount of your net investment income.

Gambling losses: Deductible up to the amount of gambling winnings reported as income. You cannot use gambling losses to create a net loss.

Home office deduction: Available for self-employed individuals (not employees) who use a dedicated portion of their home exclusively and regularly for business.

Business miles driven: If you use your vehicle for business (as a self-employed person), the standard mileage rate for 2026 is 70 cents per mile for business use. This goes on Schedule C, not Schedule A, but contributes to reducing your overall tax liability.

The State Return Complication

Some states do not conform to the federal standard deduction. This means your itemizing decision for federal purposes may differ from what makes sense for your state return. California, for example, has its own standard deduction of just $5,540 for single filers in 2025, making itemizing more likely to win on the state return even when the federal standard deduction wins.

Always check your state's rules separately. Tax software handles this automatically if you use it.

Real-World Examples

Example: Lin, 34, homeowner in a high-cost city

Situation: Lin is single and bought a condo for $480,000 with a $384,000 mortgage at 7.2%. Her first-year mortgage interest is approximately $27,500. She also pays $5,800 in property taxes plus $7,100 in state income taxes (SALT capped at $10,000). She donates $1,500 annually.

Total itemized deductions: $27,500 + $10,000 + $1,500 = $39,000.

Standard deduction: $15,000.

Decision: Itemize. She deducts an extra $24,000, saving roughly $5,280 in federal taxes at her 22% marginal rate.

Example: Marcus, 27, renter

Situation: Marcus rents, has no mortgage, pays $4,200 in state income taxes, and donates $600 to charity.

Total itemized deductions: $4,800.

Standard deduction: $15,000.

Decision: Take the standard deduction immediately. His actual itemizable expenses are less than a third of the standard deduction.

How to Check Which Method Wins for You

If you use tax software (TurboTax, H&R Block, FreeTaxUSA, etc.), it will calculate both options and select the larger one automatically. You can also review the comparison in the software before finalizing.

If you are doing it manually, add up your potential itemized deductions (mortgage interest statement from Form 1098, property tax records, state tax records, and charitable donation receipts) and compare that total to your standard deduction amount.

For a broader understanding of how deductions interact with your tax bracket to determine your actual tax bill, see How Does a Tax Bracket Actually Work?.

This post is for informational purposes only and does not constitute tax or financial advice. Tax law changes frequently. The SALT cap and other provisions are subject to Congressional action. Verify current rules at irs.gov or consult a qualified tax professional before filing.