Estimated US federal income tax (2024 brackets).
Estimate only — excludes deductions, credits, state/local tax and FICA.
Tax = Σ [ min(Taxable Income, Bracket Upper Limit) − Bracket Lower Limit ] × Bracket Rate Taxable Income = Gross Income − Deductions (Standard or Itemized) Effective Tax Rate = (Total Tax / Gross Income) × 100 Marginal Tax Rate = Rate of the highest bracket reached
US federal income tax is progressive, meaning different portions of your income are taxed at different rates. The calculation starts with your gross income, subtracts your standard (or itemized) deduction to arrive at taxable income, and then applies the appropriate IRS tax bracket rates in layers.
For each bracket, only the income within that bracket range is taxed at that bracket's rate. The results from all brackets are summed to produce your total federal tax liability.
Taxable Income = $75,000 − $14,600 = $60,400 2024 Single Filer Tax Brackets applied to $60,400: • 10% on $0–$11,600 = $1,160.00 • 12% on $11,601–$47,150 = $4,266.00 (i.e., $35,550 × 12%) • 22% on $47,151–$60,400 = $2,914.78 (i.e., $13,250 × 22%) Total Federal Tax = $1,160 + $4,266 + $2,914.78 = $8,340.78 Effective Tax Rate = $8,340.78 / $75,000 = 11.12% Marginal Tax Rate = 22%
Result: Estimated Federal Tax: **$8,341** | Effective Rate: **11.1%** | Marginal Rate: **22%**
In this example, a single filer earning $75,000 owes approximately $8,341 in federal income tax after claiming the 2024 standard deduction of $14,600. Although their top marginal rate is 22%, their effective rate is only 11.1% because lower portions of income are taxed at the lower 10% and 12% rates. This distinction between marginal and effective rate is one of the most important concepts in understanding your actual tax burden.
Note: This result is an estimate for federal tax only. It does not include state income taxes, FICA (Social Security/Medicare) taxes, the net investment income tax, or any tax credits. Your actual liability may differ. Consult a qualified tax professional or the IRS for authoritative guidance.
The US federal income tax system is progressive: as your income rises, higher portions of it are taxed at higher rates. For 2024, there are seven brackets: 10%, 12%, 22%, 24%, 32%, 35%, and 37%. Critically, each rate only applies to income within that bracket's range — not your entire income.
Before applying brackets, you reduce your gross income by deductions. Most taxpayers claim the standard deduction because it exceeds their itemized deductions. For 2024, standard deductions are:
If your mortgage interest, charitable contributions, state taxes paid (SALT, capped at $10,000), and other qualifying expenses exceed these amounts, itemizing may lower your tax bill.
Deductions reduce your taxable income, while credits reduce your tax bill dollar-for-dollar. Common credits include the Earned Income Tax Credit (EITC), Child Tax Credit, and education credits. This calculator estimates tax before credits are applied.
Your filing status determines which bracket thresholds and standard deduction apply. Married Filing Jointly thresholds are generally double those for single filers, which eliminates the so-called "marriage penalty" for most couples.
Self-employed individuals also owe self-employment tax (15.3% on net earnings up to $168,600 in 2024) in addition to income tax. This calculator estimates income tax only.
Adjusted Gross Income (AGI) is your gross income minus 'above-the-line' deductions (e.g., IRA contributions, student loan interest). Taxable income is your AGI minus the standard or itemized deduction. Tax brackets are applied to taxable income, not AGI.
Common legal strategies include maximizing pre-tax retirement contributions (401k, traditional IRA), contributing to an HSA, harvesting investment losses, claiming all eligible deductions and credits, and timing income or deductions across tax years. Consult a CPA or tax advisor for personalized planning.
Withholding is the amount your employer deducts from each paycheck and sends to the IRS on your behalf. If your total withholding for the year exceeds your tax liability, you get a refund. If it falls short, you owe additional tax. Use IRS Form W-4 and the IRS Tax Withholding Estimator to align withholding with your estimated liability.
Yes. Traditional 401(k) contributions are made pre-tax, reducing your gross income (and therefore your taxable income) dollar-for-dollar, up to the 2024 limit of $23,000 ($30,500 if age 50+). Roth 401(k) contributions do NOT reduce current-year taxable income but allow tax-free withdrawals in retirement.
The standard federal income tax filing deadline is **April 15** of the following year (e.g., April 15, 2025 for tax year 2024). You can request an automatic six-month extension (to October 15), but any taxes owed are still due by the original April deadline to avoid interest and penalties.
For 2024, the seven brackets for single filers are: 10% ($0–$11,600), 12% ($11,601–$47,150), 22% ($47,151–$100,525), 24% ($100,526–$191,950), 32% ($191,951–$243,725), 35% ($243,726–$609,350), and 37% (over $609,350).
No. This calculator estimates **federal income tax only**. State income tax rates and rules vary widely by state — from 0% in states like Texas and Florida to over 13% in California. You would need a separate state tax calculator for that.
No — this is an **estimate** based on IRS brackets and a simplified deduction model. Your actual liability depends on specific credits, additional income types (capital gains, dividends), phase-outs, AMT, and other factors. Always verify with official IRS tools or a tax professional.
The 2024 standard deduction is $14,600 for Single and Married Filing Separately filers, $29,200 for Married Filing Jointly, and $21,900 for Head of Household. Taxpayers 65 or older or blind receive an additional amount on top of these figures.
You should itemize if your qualifying deductions (mortgage interest, state/local taxes up to $10,000, charitable gifts, medical expenses above 7.5% of AGI, etc.) **exceed** the standard deduction for your filing status. For most taxpayers, the standard deduction is larger and simpler to claim.
The NIIT applies to net investment income for taxpayers with modified AGI above $200,000 (single) or $250,000 (married filing jointly). This calculator estimates ordinary income tax only and does not calculate the NIIT. High-income investors should factor this in separately.
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