Federal Tax Bracket Calculator
Estimate U.S. federal ordinary income tax, marginal rate, and effective rate using annual tax brackets and the larger of your entered deduction or the basic standard deduction.
Inputs
Estimated results
Estimated federal income tax is $17,152.00.
Tax by bracket
| Tax rate | Bracket range | Income taxed in bracket | Tax from bracket |
|---|---|---|---|
| Total | $102,000.00 | $17,152.00 | |
Each row applies one rate only to the portion of taxable income inside that bracket. The marginal rate is the rate on the last taxable dollar, not the rate applied to all income.
How to use the federal tax bracket calculator
What this calculator does
This calculator estimates federal ordinary income tax under the progressive rate schedule for the selected year and filing status. It subtracts the larger of the amount entered in Deductions or the built-in basic standard deduction, then applies each bracket rate to the corresponding slice of taxable income. It is useful for planning and comparison, but it does not prepare a tax return or include credits, payroll taxes, self-employment tax, capital-gains rates, the alternative minimum tax, qualified business income rules, phaseouts, state tax, or every special deduction.
When to use it
Use the estimator to compare filing-status scenarios, understand why entering a higher deductible amount may reduce taxable income, estimate the effect of moving into another marginal bracket, or build a rough annual cash reserve for federal income tax. The IRS explains that a progressive system applies different rates to different portions of taxable income; see the official federal income tax rates and brackets.
How to calculate
- The calculator opens with a complete 2026 demonstration: Single status, $120,000 of income, and $18,000 of deductions. The first estimate and a validated example Excel workbook are available immediately.
- Select Year and Filing status. Replace Total taxable income and Deductions with your own annual U.S.-dollar assumptions.
- Read Estimated federal income tax, then use the secondary cards and Tax by bracket table to see the deduction, taxable base, marginal rate, effective rate, and tax generated by each bracket.
- Choose Download Excel to export the current inputs and calculation. Reset clears the demonstration data and results; Download Excel stays unavailable until a complete valid state is entered again.
Input guide
Year is required and accepts 2021 through 2026. It changes the bracket thresholds and basic standard deduction. For example, 2026 uses $16,100 for Single filers. A common mistake is using the filing year instead of the year in which the income was earned. Filing status is required and accepts Single, Married filing jointly, Married filing separately, or Head of household. It changes both brackets and the standard deduction; choose the status expected on the federal return rather than household relationship alone.
Total taxable income is a required nonnegative annual dollar amount from $0 to $1,000,000,000 in U.S. decimal notation, such as 120000 or 120,000.00. In this tool it is the modeled income before the deduction shown below, despite the familiar tax phrase “taxable income.” Raising it generally increases tax and can raise the marginal rate. Do not paste scientific notation, currency letters, or decimal-comma values. Deductions is a required nonnegative dollar amount in the same format, such as 18000. The calculator compares it with the basic standard deduction and uses the larger amount. A higher entered deduction changes the result only once it exceeds the standard deduction. It does not automatically include additional deductions for age, blindness, dependency, or temporary special deductions.
Output guide
Estimated federal income tax is the sum of tax from all occupied brackets. Taxable income after deduction is income minus the deduction used, floored at zero. Deduction used is the greater of the entered amount and the basic standard deduction. Marginal tax rate is the rate applied to the final taxable dollar; zero taxable income produces 0%. Effective tax rate is estimated tax divided by the original income, so it is normally lower than the marginal rate. After-tax income subtracts only this estimated federal income tax from the entered income. Standard deduction shows the built-in basic amount for the selected year and filing status.
The Tax by bracket table lists Tax rate, Bracket range, Income taxed in bracket, and Tax from bracket. A zero row means the taxable base did not reach that bracket. The table total must equal both taxable income after deduction and estimated tax. These are estimates based on the selected schedule, while the row arithmetic is an exact identity within the model.
Worked example
In the opening example, $120,000 of income minus the larger of the $18,000 entered deduction and the $16,100 standard deduction leaves $102,000 of taxable income. For a Single filer in 2026, the first $12,400 is taxed at 10% ($1,240), the next $38,000 is taxed at 12% ($4,560), and the remaining $51,600 is taxed at 22% ($11,352). The estimated tax is therefore $17,152.00, the marginal rate is 22.00%, and the effective rate on $120,000 is 14.29%. The live calculator, table, and workbook use the same bracket slices.
Learn more
Review the IRS explanation of the standard deduction and the IRS announcement of 2026 inflation adjustments. For broader return preparation, consult IRS Publication 505 on withholding and estimated tax.
How the progressive calculation works
Tax = Σ [rate × income inside that bracket]. Effective rate = tax ÷ income. Marginal rate = rate on the last dollar of taxable income.
Entering a deduction does not reduce tax dollar-for-dollar. It reduces the income exposed to bracket rates. A $1,000 increase in deductions saves about $220 when the removed income would otherwise have been taxed at 22%, but only while that income remains inside that marginal band. Tax credits work differently and are outside this calculator.
This calculator is an educational planning estimate, not personalized tax advice. Tax law contains exceptions and definitions that cannot be represented by four inputs, so compare the estimate with current IRS instructions or a qualified tax professional before filing or making a major payment decision.