Tax Calculator
Estimate your federal income tax using 2024 IRS brackets and filing status
What is an income tax calculator?
An income tax calculator estimates your federal tax liability based on your gross income, filing status, and deductions. It applies the IRS progressive tax brackets to determine your total tax owed, effective tax rate, marginal rate, and after-tax take-home pay — helping you plan your finances with precision.
Federal Tax Owed
$10,541.00
Effective rate: 12.40%
Effective Tax Rate
12.40%
Marginal Tax Rate
22%
Taxable Income
$70,400.00
Deduction Amount
$14,600.00
Take-Home Pay
$74,459.00
Tax Bracket Breakdown
| Rate | Taxable Amount | Tax |
|---|---|---|
| 10% | $11,600.00 | $1,160.00 |
| 12% | $35,550.00 | $4,266.00 |
| 22% | $23,250.00 | $5,115.00 |
| Total | $70,400.00 | $10,541.00 |
How is federal income tax calculated?
The US federal income tax uses a progressive bracket system. Your taxable income (gross income minus deductions) is divided across brackets, and each portion is taxed at its corresponding rate. The total tax is the sum of tax from all applicable brackets.
Progressive Tax Formula
Where each bracket has a rate applied only to income within that bracket's range. Your taxable income is your gross income minus your standard or itemized deduction.
Variable Definitions
- Gross Income: Total annual income before any deductions
- Deduction: Standard or itemized amount subtracted from gross income
- Taxable Income: Gross income minus deductions
- Marginal Rate: Tax rate on your last dollar of taxable income
- Effective Rate: Total tax divided by gross income (average rate)
The progressive system ensures that only the income within each bracket is taxed at that bracket's rate — not your entire income.
Frequently Asked Questions
Your marginal tax rate is the rate applied to your last dollar of taxable income — it is the highest bracket you fall into. Your effective tax rate is the average rate across all your income, calculated as total tax owed divided by gross income. The effective rate is always lower than the marginal rate because only a portion of your income is taxed at the highest bracket.
For the 2024 tax year, the 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. These amounts are set by the IRS and are adjusted annually for inflation.
You should itemize if your total itemized deductions — including mortgage interest, state and local taxes (SALT), charitable contributions, and medical expenses — exceed the standard deduction amount for your filing status. Most taxpayers benefit from taking the standard deduction, especially after the 2017 Tax Cuts and Jobs Act significantly increased it.
The 2024 federal income tax has seven brackets with rates of 10%, 12%, 22%, 24%, 32%, 35%, and 37%. The income thresholds vary by filing status. For example, a Single filer pays 10% on the first $11,600, 12% on income from $11,601 to $47,150, and so on up to 37% on income above $609,350.
Taxable income is your gross income minus deductions. You can take either the standard deduction or itemize your deductions, whichever gives you a larger reduction. Taxable income is the amount that is actually subject to the progressive federal tax brackets.
No, this calculator estimates federal income tax only. State income taxes vary widely — some states like Texas and Florida have no state income tax, while others like California and New York have rates exceeding 10%. For a complete tax picture, consult your state's tax authority or a qualified tax professional.