Determine your marginal and effective tax rates across federal income tax brackets with filing status comparison.
This calculator takes one number - your taxable income for a chosen tax year and filing status - and runs it through the federal income tax rate schedule, reporting the marginal rate (what your next dollar pays) and the effective rate (what you actually paid overall). The two are routinely confused: the marginal rate is not your average rate, and for any income spanning more than one bracket the effective rate sits below it. The usual mistake is entering full salary instead of taxable income after deductions, which overstates the bill. A filing status comparison shows the same income under single, married, and head-of-household rules, where marriage penalties and head-of-household savings become visible.
A concrete input and expected output from the current implementation.
Input
Taxable income: $75,000, Filing status: Single, Tax year: 2025
Expected output
Marginal rate: 22%. Effective rate: 15.2%. Total federal income tax: $11,414 ($1,192.50 at 10% + $4,386.00 at 12% + $5,835.50 at 22%). Comparison: as married filing jointly, the same $75,000 owes $8,523 at a 12% marginal rate and an 11.4% effective rate.
Each bracket rate applies only to the income inside that range, so the single filer's $11,414 is a blend of 10%, 12%, and 22%, and the effective rate of 15.2% sits well below the 22% marginal rate. Married brackets are twice as wide at the bottom, so the same income stays inside the 12% bracket and owes $8,523.
The tool holds the IRS-published rate schedule for the selected year and filing status, then taxes each slice of income at its own bracket rate. A single filer with $75,000 in taxable income pays 10% on the first $11,925, 12% on the next $36,550, and 22% on the remaining $26,525, which is why the sum ($11,414) is far below $75,000 times 22%.
Marginal rate is the bracket the last dollar landed in; effective rate is total tax divided by total taxable income. Because the tax is a sum over brackets, effective always trails marginal once income passes the first bracket. The comparison view re-runs the same income through each filing status's schedule so you can see, for example, where two singles pay more or less than a married couple.
No. Each bracket rate applies only to the income inside its range, so a single filer with $75,000 of taxable income owes $11,414, which is an effective rate of about 15.2%, not 22%. The effective rate - total tax divided by income - is the number that describes your actual federal income tax bill.
No - enter taxable income, which is gross pay minus the standard or itemized deduction and pre-tax retirement contributions. The 2025 standard deduction is $15,000 for single filers, enough to drop many salaries one or two brackets. Entering salary makes the calculator tax money that was never subject to tax.
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