Federal tax filers who turned 65 before the end of the tax year can reduce their taxable income by claiming an additional standard deduction on top of the regular one, a benefit written directly into the Internal Revenue Code. The extra amount is adjusted for inflation each year, and the IRS has already published updated figures for both the 2025 and 2026 filing seasons. Yet the mechanics of claiming it, especially for married couples and surviving spouses, often trip up filers who rely on paper instructions alone or overlook the age checkbox on the front of the return.
How the extra deduction works and why timing matters for 2025 filers
The legal basis is straightforward. The statute governing the standard deduction, found in Section 63 of the tax code, defines that deduction as including an “additional standard deduction for aged and blind.” Any taxpayer who has attained age 65 by the close of the taxable year qualifies. If a filer is both 65 or older and legally blind, the law permits adding both additional amounts together, stacking the age and blindness increases on top of the basic standard deduction.
For tax year 2025, filers claim the benefit by checking the appropriate age or blindness boxes on Form 1040 or Form 1040-SR. The official general instructions for Form 1040 direct anyone who checks those boxes to use a separate standard deduction chart rather than the single flat figure most filers see. That chart produces a higher deduction, which directly lowers taxable income before any credits apply. Because the standard deduction reduces adjusted gross income on the face of the return, it can also indirectly affect income-based phaseouts elsewhere on the form.
The inflation-adjusted dollar amounts for tax year 2025 were published in Internal Revenue Bulletin 2024-45 under the subsection implementing Section 63(f). Unmarried filers who are not surviving spouses receive a higher additional amount than married filers, reflecting the code’s recognition that single seniors generally lack a second household income. For tax year 2026, the IRS released a separate set of figures in a subsequent Internal Revenue Bulletin, and an accompanying news release confirmed the annual update. Seniors who expect to cross the 65 threshold during 2026 should pay attention to the year of their birthday: the extra deduction applies for any year in which they are 65 by December 31, even if they turned 65 on that last day of the year.
Filing rules that create errors for seniors and spouses
Eligibility looks simple on the surface, but joint-filing rules introduce real complexity. IRS Publication 501 for tax year 2025 details how the additional deduction applies when one spouse is 65 or older but the other is not, and when a couple files jointly versus separately. A married couple in which both spouses are 65 or older can each add the extra amount, effectively doubling the benefit on a joint return. A couple where only one spouse qualifies adds just one additional amount, even though both share the same basic standard deduction.
Surviving spouses can be tripped up by filing-status changes. The year a spouse dies, a joint return is generally still allowed, and the additional standard deduction is computed based on the ages and blindness status of both spouses as of the end of that year. In later years, a surviving spouse may qualify to file as a qualifying surviving spouse or as head of household before eventually switching to single status. Each status uses its own basic standard deduction, but the age-based add-on continues as long as the surviving taxpayer remains 65 or older, and the correct box is checked on the return.
The IRS offers a senior-specific resource, Publication 554, that states plainly that taxpayers who do not itemize are entitled to a higher standard deduction if they are 65 or older or blind. The publication walks through examples in which a married couple claims two additional amounts, and another in which only one spouse qualifies. It also highlights a common mistake: some seniors assume they must itemize to receive any special benefit, when in fact the additional standard deduction is available only to those who use the standard deduction in the first place.
Another potential confusion point is the interaction between the standard deduction and other adjustments. The IRS explains in its overview of standard deduction rules that certain taxpayers-such as those who are married filing separately and have a spouse who itemizes, or nonresident aliens-cannot take the standard deduction at all. In those cases, the additional amount for age or blindness is also unavailable. Seniors in these categories must rely on itemized deductions and cannot substitute the higher standard deduction, no matter their age.
Software usually applies these rules automatically once a filer enters a date of birth and answers the blindness question, but paper filers must carefully follow the line-by-line instructions and use the correct chart. For 2025 and 2026, the key steps are to confirm that age 65 is reached by year-end, choose the proper filing status, and then apply the additional standard deduction amounts exactly as outlined in IRS guidance. Doing so can preserve a valuable tax benefit that Congress specifically designed to ease the burden on older taxpayers living on fixed or limited incomes.
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