What Is the Standard Deduction?

The standard deduction is a preset amount the IRS allows most taxpayers to subtract from gross income to arrive at taxable income. It is available instead of itemizing and varies based on filing status, age, and blindness. For tax year 2025, the law sets the base standard deduction at 15,750 dollars for single filers, 31,500 dollars for married couples filing jointly and qualifying surviving spouses, and 23,625 dollars for heads of household. These amounts reflect legislative changes enacted in 2025.

Key Takeaways

• 2025 base amounts: 15,750 dollars (single or married filing separately), 31,500 dollars (married filing jointly or surviving spouse), and 23,625 dollars (head of household).
• The One Big Beautiful Bill Act of 2025 made the larger standard deduction permanent and raised the 2025 amounts.
• Individuals age 65 or older and people who are blind may claim an additional standard deduction amount.
• A temporary senior deduction of 6,000 dollars per eligible person applies for 2025 through 2028, with income phaseouts.
• Certain taxpayers cannot use the standard deduction, including many nonresident aliens and some married individuals filing separately when a spouse itemizes.

How the Standard Deduction Works

When you file your federal return, you choose between taking the standard deduction or itemizing on Schedule A. The standard deduction is simple and does not require tracking specific deductible expenses. If your potential itemized deductions are lower than the standard deduction available for your filing status, taking the standard deduction generally lowers taxable income more. The IRS adjusts deduction mechanics and line references periodically, but the choice each year remains the same: standard or itemized.

2025 Amounts and Recent Law Changes

In July 2025, Congress enacted the One Big Beautiful Bill Act, which extended and enhanced several individual tax provisions. The law made the increased standard deduction introduced under the Tax Cuts and Jobs Act permanent and set the 2025 base amounts at 15,750 dollars for single or married filing separately, 31,500 dollars for married filing jointly and qualifying surviving spouses, and 23,625 dollars for heads of household. These figures superseded earlier 2025 inflation figures the IRS released before the new law.

Additional Amounts for Age and Blindness

Taxpayers who are age 65 or older, or blind, can add an extra amount to the base standard deduction. For 2025, commonly referenced guidance indicates an added 2,000 dollars for single or head of household filers and 1,600 dollars per qualifying spouse for married filing jointly or separately. These additions are available whether you qualify due to age, blindness, or both, and they stack with the base standard deduction.

Temporary Senior Deduction, 2025–2028

The 2025 legislation also created a separate, time-limited senior deduction of 6,000 dollars per qualified individual age 65 or older, available for tax years 2025 through 2028. For a married couple filing jointly where both spouses qualify, the maximum annual amount is 12,000 dollars. The deduction phases out as modified adjusted gross income exceeds 75,000 dollars for single filers and 150,000 dollars for joint filers, reducing by 6 percent of income above the threshold. This deduction is on top of the standard deduction and the age or blindness add-on amounts.

Who Can and Cannot Claim It

Most U.S. taxpayers qualify for the standard deduction. There are notable exceptions. Nonresident aliens generally cannot claim the standard deduction unless a specific treaty or election applies, such as certain students or apprentices from India. In addition, if you are married filing separately and your spouse itemizes, you must also itemize, so the standard deduction is not available on your return. Similar limitations apply if you file a return for a period shorter than 12 months because of a change in your accounting period. The IRS outlines these restrictions and when itemizing is required.

Standard Deduction vs. Itemizing

Itemizing can be advantageous if deductible expenses exceed the standard deduction. Typical itemized deductions include mortgage interest, state and local taxes subject to statutory limits, charitable contributions, and qualifying medical expenses above a percentage of adjusted gross income. For many households, particularly after the 2025 law’s enhancements, the standard deduction will exceed itemizable amounts. Taxpayers should compare outcomes annually since both income and deductible expenses can change, and because some provisions, like the temporary senior deduction, are time-limited. Authoritative summaries of the 2025 changes emphasize that the larger standard deduction is now permanent in the code unless changed by future legislation.

Planning Considerations and Examples

Consider a married couple filing jointly in 2025 with 90,000 dollars of adjusted gross income, both age 67, neither blind. Their base standard deduction is 31,500 dollars, plus 1,600 dollars each for age, bringing the standard deduction to 34,700 dollars. Because both spouses are 65 or older, they also may qualify for the temporary senior deduction of 12,000 dollars if their modified adjusted gross income is 150,000 dollars or less, subject to the phaseout. Their combined deductions could reach 46,700 dollars before considering any itemized deductions. If their itemizable expenses total only 20,000 dollars, the standard route yields lower taxable income in 2025.

By contrast, a single filer age 40 with significant mortgage interest and charitable gifts totaling 18,000 dollars could find itemizing preferable, since the 2025 single standard deduction is 15,750 dollars. A quick comparison each filing season helps determine the better approach.

Finally, note that states often have their own standard deduction rules or none at all. The federal standard deduction does not automatically control state taxable income, so state-level guidance should be checked each year.

The Bottom Line

The standard deduction is a straightforward way to reduce taxable income. For 2025, Congress raised the base amounts and made the TCJA’s larger standard deduction permanent, while adding a temporary senior deduction that can meaningfully increase deductions for many older taxpayers through 2028. Age and blindness add-ons remain available, and long-standing eligibility rules still apply. Compare the standard deduction with itemizing every year, and pay close attention to the temporary provisions and phaseouts that could affect the optimal strategy for your household.