What this line means
Your federal income tax, calculated from the taxable income on line 15 using the Tax Table, Tax Computation Worksheet, or Schedule D Tax Worksheet. If you have qualified dividends or long-term capital gains, the Qualified Dividends and Capital Gain Tax Worksheet applies lower rates (0%, 15%, or 20%) to that portion of your income.
Does this apply to you?
- You have taxable income greater than zero on line 15
- You have qualified dividends reported on line 3a
- You have long-term capital gains from Schedule D
- You need to determine whether your withholding and estimated payments cover your tax
- You are comparing your marginal tax rate to your effective tax rate
Easy to overlook
Qualified dividends and long-term gains are taxed at lower rates If you have qualified dividends (line 3a) or net long-term capital gains, do not use the standard Tax Table for the full amount. Use the Qualified Dividends and Capital Gain Tax Worksheet instead. For 2025, the 0% rate applies to taxable income up to $48,350 (single) or $96,700 (married filing jointly). Many retirees living on dividends and Social Security fall entirely within the 0% capital gains bracket. 1 IRS Form 1040-SR Instructions — Line 16
The tax may be lower than expected due to the senior standard deduction Seniors often overestimate their tax because they calculate it on gross income rather than taxable income. A couple with $60,000 in pension income and the married filing jointly senior standard deduction of $33,200 (both 65+)2 has only $26,800 in taxable income — placing them squarely in the 12% bracket for 2025. 3 IRS Publication 505 — Tax Withholding and Estimated Tax
Watch out for this
Using the wrong worksheet. If line 15 includes qualified dividends or capital gains, the standard Tax Table overcharges you by applying ordinary rates to income that qualifies for the lower capital gains rates. Check line 3a and Schedule D before defaulting to the Tax Table.
Footnotes
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IRS Form 1040-SR Instructions, Line 16, Qualified Dividends and Capital Gain Tax Worksheet. https://www.irs.gov/instructions/i1040sr ↩
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IRS Revenue Procedure 2024-40, Section 3.01, Standard Deduction amounts for 2025. https://www.irs.gov/pub/irs-drop/rp-24-40.pdf ↩
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IRS Publication 505, Tax Withholding and Estimated Tax. https://www.irs.gov/pub/irs-pdf/p505.pdf ↩