Income Tax Calculator
Calculate your 2024 US federal income tax using the official IRS tax brackets. See your effective and marginal tax rates with a detailed bracket-by-bracket breakdown.
Tax year 2024 (filed in 2025) - Based on IRS Revenue Procedure 2023-34
Federal Tax Estimator
Your total income before deductions (W-2 wages, salary, etc.)
Standard deduction: $14,600
How to Use This Tax Calculator
Enter Your Income
Type your annual gross income (before taxes). This is your total W-2 wages, salary, or other earned income for the year.
Select Filing Status
Choose your IRS filing status and deduction type. The calculator shows your standard deduction amount, or enter a custom itemized deduction total.
Review Your Breakdown
See your total federal tax, effective and marginal rates, and a bracket-by-bracket table showing exactly how your income is taxed at each level.
2024 Federal Tax Brackets
| Rate | Single | Married Jointly | Married Separately | Head of Household |
|---|---|---|---|---|
| 10.0% | $0 - $11,600 | $0 - $23,200 | $0 - $11,600 | $0 - $16,550 |
| 12.0% | $11,600 - $47,150 | $23,200 - $94,300 | $11,600 - $47,150 | $16,550 - $63,100 |
| 22.0% | $47,150 - $100,525 | $94,300 - $201,050 | $47,150 - $100,525 | $63,100 - $100,500 |
| 24.0% | $100,525 - $191,950 | $201,050 - $383,900 | $100,525 - $191,950 | $100,500 - $191,950 |
| 32.0% | $191,950 - $243,725 | $383,900 - $487,450 | $191,950 - $243,725 | $191,950 - $243,700 |
| 35.0% | $243,725 - $609,350 | $487,450 - $731,200 | $243,725 - $365,600 | $243,700 - $609,350 |
| 37.0% | Over $609,350 | Over $731,200 | Over $365,600 | Over $609,350 |
How Federal Income Tax Is Calculated
Taxable Income = Gross Income - DeductionThe US uses a progressive tax system with seven tax brackets. Your income is not taxed at a single flat rate. Instead, each portion of your income is taxed at the rate for the bracket it falls into.
Tax = Sum of (Income in each bracket x Bracket rate)The calculation steps are:
- Start with gross income - your total annual earnings
- Subtract your deduction - either the standard deduction or your itemized deductions total
- Apply each bracket - fill each bracket from lowest to highest, taxing each portion at its bracket rate
- Sum all bracket taxes - the total is your federal income tax liability
Your marginal rate is the rate on your last dollar of income. Your effective rate is your total tax divided by gross income, representing what you actually pay as an average across all brackets.
Frequently Asked Questions
What are the 2024 federal income tax brackets?
For tax year 2024 (filed in 2025), there are seven federal income tax brackets: 10%, 12%, 22%, 24%, 32%, 35%, and 37%. The income thresholds vary by filing status. For example, the 10% bracket for single filers covers income up to $11,600, while for married filing jointly it covers income up to $23,200. These brackets were adjusted for inflation from 2023 per IRS Revenue Procedure 2023-34.
What is the difference between marginal and effective tax rate?
Your marginal tax rate is the rate applied to your last dollar of taxable income - it corresponds to the highest tax bracket your income falls into. Your effective tax rate is your total tax divided by your total gross income, representing the average rate you actually pay across all brackets. Because the US uses a progressive tax system, your effective rate is always lower than your marginal rate (unless all your income falls in the 10% bracket).
What is the standard deduction for 2024?
For tax year 2024, the standard deduction is $14,600 for single filers and married filing separately, $29,200 for married filing jointly, and $21,900 for head of household. Taxpayers age 65 or older or who are blind get an additional deduction amount. You can choose to itemize deductions instead if your itemized deductions exceed the standard deduction.
Does this calculator include state income tax?
No, this calculator covers only US federal income tax. State income tax rates and rules vary widely. Seven states (Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, and Wyoming) have no state income tax, while others have flat or progressive rate structures. For a complete picture of your tax liability, you would need to add your applicable state and local taxes.
How does the progressive tax system work?
The US federal income tax uses a progressive (or graduated) system. This means your income is divided into portions, and each portion is taxed at its corresponding bracket rate. For example, if you are a single filer with $50,000 in taxable income, your first $11,600 is taxed at 10%, the next $35,550 (from $11,600 to $47,150) is taxed at 12%, and the remaining $2,850 is taxed at 22%. You do not pay 22% on your entire income.
Important Disclaimer
This calculator provides estimates for educational purposes only. It calculates federal income tax based on the 2024 tax brackets and does not account for tax credits (such as the Earned Income Tax Credit or Child Tax Credit), FICA taxes, self-employment tax, capital gains, or state and local taxes. Your actual tax liability may differ. Always consult a qualified tax professional or use IRS resources for official tax preparation.