Federal tax
One more dollar of income
Compare regular federal income tax before and after an increase in ordinary income.
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Sources to check
IRS Revenue Procedure 2025-32 ↗Additional federal income tax
$2,200
Tax before increase$13,170
Tax after increase$15,370
Additional income after this tax$7,800
Rate across the increase22%
Ending marginal bracket rate22%
What this model assumes
- Ordinary federal income only. Income means adjusted gross income before the deduction entered.
- Basic standard deduction only; assumes a full-year U.S. resident who is not a dependent. Separate filers must independently verify standard-deduction eligibility.
- Excludes credits, QBI, senior and other special deductions, itemized-deduction limitations, AMT, preferential gains, payroll taxes, NIIT, state taxes, and return tax-table rounding.
Educational summaries, not individualized tax or legal advice. Check the source, applicable tax year, effective dates and subsequent developments. External sources are independent of Syso.tax.
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