Income Tax Calculator

About the Income Tax Calculator

The US federal income tax system uses progressive brackets, meaning different portions of your income are taxed at different rates. Our 2025 income tax calculator estimates your federal tax liability based on your filing status, taxable income, and applicable deductions. While this calculator provides a solid estimate, always consult a tax professional for advice specific to your situation, especially if you have complex income sources, significant deductions, or business income.

How It Works

Federal income taxes in 2025 use seven brackets: 10%, 12%, 22%, 24%, 32%, 35%, and 37%. These are marginal rates — meaning only income within each bracket is taxed at that rate. A single filer earning $100,000 does NOT pay 22% on all $100,000. They pay 10% on the first $11,600, 12% on income from $11,601–$47,150, and 22% on income from $47,151–$100,000. This produces an effective tax rate of approximately 17%, not 22%.

Tips & Best Practices

• ✓The standard deduction for 2025 is $14,600 (single) / $29,200 (married filing jointly).
• ✓401k contributions reduce taxable income dollar-for-dollar — max is $23,000 in 2025.
• ✓HSA contributions are triple-tax-advantaged: deductible, grow tax-free, withdrawn tax-free for medical.
• ✓The child tax credit of $2,000 per child directly reduces taxes owed, not just taxable income.
• ✓Itemizing deductions only makes sense if they exceed the standard deduction.

Who Uses This Calculator

This calculator is most useful for W-2 employees estimating tax refunds or underpayment, freelancers estimating quarterly estimated tax payments, and anyone evaluating the tax impact of a raise, job change, or large financial decision like selling an investment.