Income Tax Calculator
Estimate your U.S. federal income tax using 2024 tax brackets with filing status and deductions
Enter your gross income above to estimate your federal tax.
What is an Income Tax Calculator?
An income tax calculator estimates your U.S. federal income tax liability based on your gross income, filing status, and deductions. The U.S. uses a progressive tax system, meaning different portions of your income are taxed at different rates. This calculator uses the 2024 federal tax brackets to show your estimated tax, effective tax rate, and marginal rate — the rate on your last dollar of income.
How to Use the Tax Calculator
- Enter your gross annual income
- Select your filing status (Single, Married Filing Jointly, or Head of Household)
- Optionally enter itemized deductions — the calculator uses whichever is higher
- See your estimated federal tax, effective rate, and bracket breakdown
Features
- 2024 U.S. federal income tax brackets for all three filing statuses
- Automatic standard deduction vs. itemized deduction comparison
- Effective tax rate and marginal tax rate display
- Full bracket breakdown showing tax owed at each rate
- After-tax (take-home) income estimate
Frequently Asked Questions
What is the difference between effective and marginal tax rate?
Your marginal tax rate is the rate applied to your last dollar of income — the highest bracket you reach. Your effective tax rate is the average rate across all your income, always lower than your marginal rate. For example, someone earning $100,000 (single) has a 22% marginal rate but an effective rate closer to 15%.
Does this include state taxes or FICA?
No — this calculator estimates federal income tax only. Your total tax burden also includes Social Security (6.2% up to $168,600), Medicare (1.45%), and state income taxes which vary by state (0% to over 13%).
What is the standard deduction for 2024?
For 2024: $14,600 for single filers, $29,200 for married filing jointly, and $21,900 for head of household. You can choose to itemize if your deductible expenses exceed these amounts — the calculator automatically uses whichever is higher.