Federal Income Tax Calculator 2025
Estimate your 2025 federal income tax with the free federal income tax calculator. Enter your income, filing status and deductions.
Federal Income Tax Calculator
Enter your income above and press Calculate.
Key Notes
- This is a simplified estimate for tax year 2025 — not the official IRS tax calculation and not tax advice.
- Example: $52,000 annual income, Single, no children = about $4,111.50 federal income tax for 2025.
- 2025 standard deduction: $15,750 single, $31,500 married filing jointly, $23,625 head of household.
- Federal tax is progressive — each bracket applies only to the income in that bracket.
- Child Tax Credit: up to $2,000 per qualifying child under 17.
How the federal income tax calculator works
Enter your annual gross income, filing status, tax year, pre-tax deductions, and dependents. The calculator subtracts your pre-tax deductions and the standard deduction for 2025, applies the federal income tax brackets progressively to your taxable income, subtracts the Child Tax Credit where it applies, and shows your annual federal tax, effective rate, marginal rate, and monthly tax. The figure is your estimated federal income tax for the year.
This is an estimate for planning only. It is not the IRS tax calculation and it is not tax advice. State tax, Social Security, Medicare, and other credits are not included. If your pay, deductions, or family situation change, check the IRS Tax Withholding Estimator or a tax professional.
What affects your federal income tax
Your filing status, annual income, pre-tax deductions such as a 401(k), and the number of qualifying children all change the result. A larger income does not mean a higher rate on all of your income — federal tax is progressive, so each bracket applies only to the income in that bracket.
Related guides on MyTaxGurus
- IRS Withholding Tax Calculator — estimate your federal withholding per paycheck.
- Tax Refund Calculator — estimate your federal tax refund for 2025.
- Capital Gains Tax Calculator — estimate short-term and long-term capital gains tax.
- TurboTax Vs H&R Block Tax Calculator — compare the two tax software options before you file.
Frequently asked questions
How do I calculate my federal income tax?
To calculate federal income tax, start with your annual gross income, subtract pre-tax deductions and the standard deduction for 2025, then apply the federal tax brackets progressively to your taxable income and subtract credits like the $2,000 Child Tax Credit. This federal income tax calculator does that calculation for you.
What is the standard deduction for 2025?
For “what is the standard deduction for 2025”, it is $15,750 for single and married filing separately, $31,500 for married filing jointly, and $23,625 for head of household.
What is my effective tax rate?
Your effective tax rate is your total federal tax divided by your total income. For example, a single filer with $52,000 income and $4,111.50 tax has an effective rate of about 7.91%. Your effective rate is always lower than your marginal rate, because federal tax is progressive.
What is my marginal tax rate?
Your marginal tax rate is the rate on your last dollar of taxable income. If your taxable income falls in the 22% bracket, your marginal rate is 22% — but only the income in that bracket is taxed at 22%.
Does this calculator include state tax?
For “does the federal income tax calculator include state tax”, no. This calculator estimates federal income tax only. State tax, local tax, Social Security, and Medicare are separate.
How much federal tax will I pay on $100,000 income?
For “how much federal tax on $100,000 income”, a single filer with $100,000 gross income in 2025 has taxable income of $84,250 after the $15,750 standard deduction, and federal tax of about $13,449. Your result changes with filing status, deductions, and credits.
Is this the official IRS tax calculator?
No, this is not the official IRS tax calculator. This is a simplified federal income tax calculator estimate made by MyTaxGurus. For the official figure, use the IRS Tax Withholding Estimator and your tax return.
Does it include the Child Tax Credit?
Yes. When you ask “does the federal income tax calculator include the Child Tax Credit”, each qualifying child under 17 can reduce your tax by up to $2,000, and other dependents by $500 each.
Why might my actual tax differ?
If you search “why is my federal tax different from the calculator”, the usual reasons are itemised deductions, other income, capital gains, multiple jobs, and credits not entered here. Your actual return uses your full tax situation.
How do I lower my federal income tax?
For “how do I lower my federal income tax”, common ways are pre-tax retirement contributions such as a 401(k), health savings account contributions, and claiming the credits and deductions you qualify for. Check with a tax professional before changing your plan.