💵 Income Tax Calculator
Estimate your US federal income tax using 2024 tax brackets, filing status, and the standard deduction.
Income Details
Your Result
This is a simplified federal estimate using 2024 tax brackets and the standard deduction only. It excludes state/local taxes, tax credits (e.g., Child Tax Credit), FICA/payroll taxes, and other deductions or adjustments. Consult a tax professional for accurate filing figures.
How the Income Tax Calculator Works
The US federal income tax system is progressive, meaning different portions of your income are taxed at increasing rates as they fall into higher brackets. This calculator subtracts the standard deduction from your gross income, then applies the 2024 marginal tax brackets to the remainder.
Formula
Tax = Σ (income in each bracket × that bracket's rate)
Effective Rate = Total Tax / Gross Income
2024 Standard Deductions
- Single: $14,600
- Married Filing Jointly: $29,200
- Head of Household: $21,900
Frequently Asked Questions
What is a marginal tax rate?
Your marginal tax rate is the tax rate applied to your last (highest) dollar of taxable income. It is not the rate applied to your entire income — only the portion that falls within that bracket.
What is the difference between marginal and effective tax rate?
The marginal rate is the rate on your highest bracket, while the effective rate is your total tax divided by your total income — a blended average that is always lower than or equal to the marginal rate.
Does this calculator include state taxes or credits?
No, this is a simplified federal-only estimate using the standard deduction. It does not include state or local taxes, tax credits, payroll taxes, or itemized deductions.