Senior Deduction Calculator: Estimate the $6,000 Deduction for Age 65 and Older

Section 70103 of Public Law 119-21 added subparagraph (C) to section 151(d)(5) of the Internal Revenue Code. The statute gives the amount and the years:

The IRS describes the same rule in plain terms, including how it relates to the age 65 extra standard deduction:

The age test is the end of the tax year, and the IRS counts a person as 65 a day early:

In practice a person is treated as 65 on the day before the 65th birthday, so someone born January 1 counts as 65 on December 31.

The deduction is a deduction, not a credit. It lowers taxable income, so a $6,000 deduction saves about $1,320 at a 22% marginal rate, not $6,000. The calculator’s tax-saved figure is an estimate of that kind.

There are two separate age 65 benefits, and you can have both. The senior deduction is new and temporary. The additional standard deduction for the aged or blind has been in the law for years and is part of the standard deduction. The IRS says the new deduction sits on top of the old one:

“Per box” means one amount for being 65 or older and another for being blind, for you and, on a joint return, for your spouse. The 2025 amounts come from Rev. Proc. 2024-40 and the 2026 amounts from Rev. Proc. 2025-32; as of October 28, 2026 the IRS had not published the additional amounts for 2027 and 2028, so the calculator leaves them out for those years rather than guess.

How the two compare:

• Who gets it. The additional standard deduction is only for people who take the standard deduction:

The senior deduction is available either way:

• Income limit. The senior deduction phases out with modified AGI. Section 63(f), as printed in the statute, has no income test and no Social Security number condition for the additional standard deduction. The statute adds the additional amounts to the standard deduction:

• Blindness. Blindness adds to the additional standard deduction only. It does not change the senior deduction, which depends on age 65 and a valid SSN.
• Married filing separately. No senior deduction, but you can still have your own additional standard deduction if you are 65 or older or blind and take the standard deduction (you cannot if your spouse itemizes on a separate return, because then your standard deduction is zero; Publication 554, quoted below). A separate-return filer can also count a spouse’s age or blindness only in a narrow case described in Publication 554 under “Spouse age 65 or older or blind”; the calculator counts only your own on a separate return.

Qualifying surviving spouse. The 2025 instructions use the single-filer threshold for this status:

For the additional standard deduction, the Rev. Procs. give the higher amount only to someone who is “unmarried and not a surviving spouse”, so a surviving spouse gets the married amount ($1,600 for 2025, $1,650 for 2026). For the 2026 tax-saved estimate the calculator uses the joint-return tax table, because Rev. Proc. 2025-32 labels it:

The statute reduces the $6,000 by 6 percent of the income above a threshold:

Modified AGI is not a new income number:

On Schedule 1-A, Part I starts from the amount on Form 1040, line 11b and adds the excluded income on lines 2a to 2d; line 3 is your MAGI. The reduction is per person. The IRS instructions say so directly:

Schedule 1-A has no rounding step for this part: it multiplies the exact excess by 6% (0.06) and subtracts the result from $6,000. The deduction is zero at the threshold plus $100,000, because $6,000 divided by 6% is $100,000: $175,000 of MAGI for single and head of household filers, and $250,000 on a joint return.

Worked examples (2026, standard deduction)

• Single, 65, MAGI $100,000. The excess over $75,000 is $25,000, and 6% of it is $1,500. The senior deduction is $6,000 − $1,500 = $4,500. Add the 2026 additional standard deduction of $2,050and the total extra deduction is $6,550.
• Married filing jointly, both 65 with SSNs, MAGI $200,000. The excess over $150,000 is $50,000, and 6% of it is $3,000. Each spouse’s $6,000 is reduced by that same amount, so each gets $3,000 and the two together get $6,000, not $9,000. Reducing one combined $12,000 once would give $9,000, and that is not how the statute or the form works.
• Tax saved. A single filer with $60,000 of MAGI gets $8,050 of extra deductions in 2026 ($6,000 plus $2,050). At a 22% marginal rate that is an estimated $1,771 of federal income tax. It is an estimate: your real saving depends on the brackets your income actually falls in.

Married people can claim it only on a joint return:

Married filing separately cannot claim it, so there is no senior deduction at all on a separate return. On a joint return, each spouse is tested on their own. Here is how the statute defines the spouse:

Each spouse also needs a valid Social Security number on the return. The statute puts it this way, per qualified individual:

For the 2025 return the IRS describes a valid SSN like this:

If a taxpayer or spouse dies during the year, the age test is applied as of the death. As of October 28, 2026, the IRS had not posted instructions for the 2026 draft form, so this is the 2025 rule:

The IRS instructions also give the joint maximum:

• One spouse 65 and the other not: only one $6,000, reduced by the same 6% formula above $150,000.
• Both 65 but one without a valid SSN: only the spouse with the SSN gets the deduction; the other’s amount is $0.
• Both 65 and both with SSNs: up to $12,000, gone at $250,000 of MAGI.
• The additional standard deduction for age or blindness does not depend on an SSN under section 63(f); it is counted separately for each spouse.

You claim it on Schedule 1-A (Form 1040), Part V, which was published for tax year 2025. The tax years it covers come from the statute’s effective date and end date:

2025 return (final form)

Part V uses lines 31 to 37. Line 35 is the reduced amount, entered once for you on line 36a and once for your spouse on line 36b, and line 37 adds them:

The Part VI total of Schedule 1-A goes on line 13b of the 2025 Form 1040 (line 13a on the 2026 draft form). The 2025 form says:

2026 return (early release draft, not final)

The IRS has posted an early release draft of the 2026 Schedule 1-A, marked “DRAFT — DO NOT FILE”. Its Part V is the same calculation on lines 37 to 43, with the age cutoff moved one year, to January 2, 1962, and line 43 adds lines 42a and 42b. Line numbers can change before the final form, so check the final version when the IRS publishes it:

2027 and 2028

The statute covers taxable years beginning before January 1, 2029. As of October 28, 2026, the IRS had not published a Schedule 1-A or the additional standard deduction amounts for 2027 or 2028, so the calculator gives only the senior deduction for those years.

• It does not make Social Security tax-free. It is a deduction from taxable income, taken on Schedule 1-A and line 13b of the 2025 Form 1040. The Social Security Benefits Worksheet in the 2025 Form 1040 instructions figures taxable benefits without Schedule 1-A, so the deduction does not change how much of your benefits is taxable. It can lower the tax on that amount. The worksheet takes only these lines:

Publication 554 gives the ordinary rule for benefits:

That is the normal Social Security rule, not an effect of this deduction. To see how much of your own benefits is taxable, use the taxable Social Security benefits calculator, which also shows the senior deduction as a separate result.

• It does not replace the additional standard deduction. You can have both, if you take the standard deduction.
• It is not available to married people filing separately, or to anyone without a valid SSN on the return.
• It is not a credit. It lowers taxable income, so the saving is the deduction times your marginal rate.
• It is not permanent. The statute allows it for taxable years beginning before January 1, 2029.
• It does not tell you your state tax. This page does not estimate state income tax, and whether your state follows the federal deduction depends on your state’s law.