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 became simpler after 2018, when the Tax Cuts and Jobs Act nearly doubled the standard deduction. The One Big Beautiful Bill Act (OBBBA), signed into law in July 2025, made that doubled standard deduction permanent and introduced several changes that reshape the itemize-vs-standard decision for 2026. The SALT cap quadrupled. A new charitable deduction became available to non-itemizers. And a temporary senior deduction was added. Whether you should itemize in 2026 depends on understanding all of these changes.

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 IR-2025-103, Revenue Procedure 2025-32.

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 $18,100 in 2026.

The New Senior Deduction (2025-2028)

The OBBBA introduced a temporary above-the-line deduction of up to $6,000 per person ($12,000 for married filing jointly) for taxpayers age 65 or older, available for tax years 2025 through 2028. This is separate from and in addition to the standard deduction. Because it is above-the-line, it is available whether you itemize or take the standard deduction, subject to income-based limitations. A married couple where both spouses are 65 or older could claim a standard deduction of $32,200 plus the additional standard deduction for being 65+ plus up to $12,000 from the senior deduction, significantly reducing their taxable income.

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. Under the OBBBA, the SALT cap was raised from $10,000 to $40,000 starting in 2025, with a 1% annual increase. For 2026, the cap is approximately $40,400. This is the most consequential change for itemizers in high-tax states. The cap applies to both single and joint filers.

However, the expanded SALT cap phases out for high earners. For married couples filing jointly with modified adjusted gross income (MAGI) above $500,000, the cap is reduced by 30 cents for every dollar over that threshold, down to a floor of $10,000. A couple with MAGI of $550,000 would see their SALT cap reduced by $15,000, leaving them with a $25,000 cap. A couple with MAGI above $600,000 is limited to the old $10,000 floor.

Charitable contributions: Cash donations to qualifying organizations are deductible up to 60% of your adjusted gross income. Starting in 2026, the OBBBA imposes a new 0.5% of AGI floor on itemized charitable deductions, meaning the first 0.5% of your AGI in donations produces no deduction. For a household with $200,000 AGI, the first $1,000 of charitable gifts is not deductible. The OBBBA also added a new above-the-line charitable deduction of $1,000 for single filers and $2,000 for joint filers who take the standard deduction, so non-itemizers can still get a small charitable benefit.

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 $16,100 (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 OBBBA changes make the itemizing decision different from any year since 2018. The quadrupled SALT cap alone could exceed the standard deduction for many homeowners in high-tax states. According to analysis from Beancount.io, the higher SALT cap rescues itemizing for millions of households in California, New York, and New Jersey that had been taking the standard deduction since 2018.

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 $40,400 SALT cap and charitable giving, total itemized deductions could easily exceed $32,200 for a married couple.

Large property tax bills plus state income tax. With the SALT cap now at $40,400, taxpayers in high-tax states can deduct far more than under the old $10,000 cap. A New Jersey homeowner paying $12,000 in property taxes and $15,000 in state income taxes can now deduct $27,000 in SALT alone, compared to just $10,000 under prior law.

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. Remember the new 0.5% AGI floor: only amounts above that threshold count.

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.

The 37% Bracket Limitation

One additional OBBBA change: taxpayers in the highest marginal bracket (37%) face a limitation on itemized deductions. Most itemized deductions (except the qualified business income deduction and SALT, which has its own phaseout) are reduced by 2/37 (approximately 5.4%). This means the tax benefit of each dollar of itemized deductions is capped at 35 cents rather than 37 cents for top-bracket filers.

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 (combined with property taxes, well below the $40,400 SALT cap)
• Charitable donations: $4,000 (minus 0.5% AGI floor of $900 = $3,100 deductible)
• 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 (under cap): $14,700
• Charitable (above floor): $3,100
• Medical: $0 (below threshold)
• Total: $57,800

Standard deduction for married filing jointly: $32,200

Result: Itemize and save taxes on an extra $25,600 of deductions.

At a 22% marginal rate, that $25,600 difference saves them approximately $5,632 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: $1,100 (after 0.5% AGI floor of $900)
• Total: $7,100

Standard deduction: $32,200.

Take the standard deduction. Itemizing would leave $25,100 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. This goes on Schedule C, not Schedule A, but contributes to reducing your overall tax liability.

Business miles driven: If you use your vehicle for business (as a self-employed person), the 2026 standard mileage rate is 72.5 cents per mile for business use (increasing to 76 cents per mile effective July 1, 2026, per Announcement 2026-11). This goes on Schedule C, not Schedule A.

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 that is much lower than the federal amount, 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 (combined SALT: $12,900, well under the $40,400 cap). She donates $1,500 annually (minus 0.5% AGI floor of $1,000 = $500 deductible).

Total itemized deductions: $27,500 + $12,900 + $500 = $40,900.

Standard deduction: $16,100.

Decision: Itemize. She deducts an extra $24,800, saving roughly $5,456 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: $4,200 (SALT) + $0 charitable (below 0.5% AGI floor) = $4,200.

Standard deduction: $16,100.

Decision: Take the standard deduction immediately. His actual itemizable expenses are less than a third of the standard deduction. He can also claim the $1,000 above-the-line charitable deduction for non-itemizers if he chooses.

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 above the 0.5% AGI floor) 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?. If you want to file your taxes for free, the post on how to do your own taxes for free covers IRS Direct File and Free File options.

This post is for informational purposes only and does not constitute tax or financial advice. Tax law changes frequently. The OBBBA provisions described here are effective for tax year 2026 and beyond, with some provisions scheduled to sunset. Verify current rules at irs.gov or consult a qualified tax professional before filing.