Estimated tax
Ordinary tax after the chosen deduction and simplified credits, floored at zero. Not a refund forecast.
Income tax calculator · Federal tax calculator
See how ordinary federal brackets apply to a simplified return.
FedTaxEst is an educational estimator for U.S. federal ordinary income tax. Enter filing status, earned income, a combined adjustment, standard or itemized deduction, and an optional rough child credit. Results show estimated tax, effective rate, and the marginal bracket — labeled for tax year 2025 or 2026.
Estimated result
Enter earned income to see estimated tax, effective rate, and the marginal bracket. The breakdown below shows how ordinary brackets stack.
- Estimated federal income tax
- $0
- Effective rate (tax ÷ AGI)
- 0%
- Marginal ordinary bracket
- 0%
- AGI
- $0
- Taxable income
- $0
| Bracket | Income in slice | Tax in slice |
|---|
Effective rate
Estimated tax divided by AGI. It is usually lower than the last bracket you touch.
Marginal bracket
The ordinary rate on the last dollar of taxable income in this model. Next-dollar planning still needs a full return.
What this federal tax calculator includes
The tool stacks the seven ordinary rates published for individuals, subtracts the OBBBA-updated standard deduction or your itemized total, then optionally reduces tax with a rough child credit and any other nonrefundable credits you enter. It is meant for learning the difference between brackets, deductions, and rates — not for e-filing.
Read the bracket tables, the standard deduction notes, and marginal versus effective rate. Sources live on the methodology page.