Income Tax Calculator
Estimate your federal income tax, FICA taxes, state taxes, and take-home pay based on standard brackets.
Important Note
This calculator provides an estimate only. Tax laws change, and your actual tax return may be different. Use this calculator to estimate your tax before filing, compare tax scenarios, plan your paycheck withholding, or understand how a raise, bonus, deduction, or credit may affect your tax.
Age 0-16. Qualifies for Child Tax Credit.
Age 17 or older.
Primary Income
(W-2 box 1)
(W-2 box 2)
(W-2 box 17)
(W-2 box 19)
Used to estimate state/local tax liability.
Other Income Sources
SSA-1099, RRB-1099
1099-INT
1099-DIV (Taxed at preferred rates)
e.g. rentals and real estate, royalties
Taxed at preferred rates
e.g. unemployment pay(1099-G)
Additional Income
Adjustments & Deductions
Max $2,500/Person
Itemized deduction
Itemized deduction
Itemized deduction
Max $10,000 for qualified vehicle
Credits
Max $3,000/Person
Tax estimate
What Is an Income Tax Calculator?
An income tax calculator is a tool that estimates your tax based on the numbers you enter. It usually starts with your gross income and filing status, then subtracts deductions and applies the tax brackets for the selected year.
A good income tax calculator can answer questions like:
- How much federal income tax will I owe?
- What is my taxable income?
- What tax bracket am I in?
- What is my effective tax rate?
- What is my marginal tax rate?
- How much tax will be taken from my paycheck?
- Will I get a refund or owe tax?
- How much income will I keep after taxes?
- How do deductions and credits affect my tax?
The process
How Does Income Tax Work?
Income tax is based on taxable income, not always your full gross income. The basic flow is:
- 1
Start with gross income.
- 2
Subtract eligible adjustments.
- 3
Get adjusted gross income.
- 4
Subtract standard or itemized deductions.
- 5
Get taxable income.
- 6
Apply tax brackets.
- 7
Subtract tax credits.
- 8
Compare final tax with withholding or payments.
- 9
Estimate refund or tax due.
Definitions
Gross vs Taxable Income
- Gross Income
- The total income you earn before deductions. Examples include Salary, Wages, Tips, Bonus, Freelance income, Business income, Interest, Dividends, Capital gains, Rental income, Pension income, and Unemployment income.
- Taxable Income
- The amount left after allowed deductions are subtracted. Your federal tax is calculated using taxable income, not the full gross income.
Deductions
Standard Deduction vs Itemized Deduction
Most taxpayers choose either the standard deduction or itemized deductions. Your calculator should let users choose between standard, itemized, or a custom deduction amount.
- Standard Deduction
- The standard deduction is a fixed amount that reduces taxable income. For 2026, the IRS lists the standard deduction as $16,100 for single filers and married filing separately, $32,200 for married filing jointly, and $24,150 for heads of household.
- Itemized Deduction
- Itemized deductions are specific expenses that may reduce taxable income. These can include certain mortgage interest, state and local taxes, charitable donations, and medical expenses, depending on tax rules and limits.
Federal tax
Federal Income Tax Brackets
The United States uses a progressive income tax system. This means different parts of your taxable income are taxed at different rates. A common mistake is thinking that if you move into a higher tax bracket, all your income is taxed at that higher rate. That is not how marginal brackets work.
For 2026, IRS federal marginal rates include 10%, 12%, 22%, 24%, 32%, 35%, and 37%, with different income thresholds by filing status. If part of your income falls into the 22% bracket, only that part is taxed at 22%. Lower portions are taxed at lower rates.
- Marginal Tax Rate
- Your marginal tax rate is the rate applied to your next dollar of taxable income. Example: If your next dollar falls in the 22% bracket, your marginal federal tax rate is 22%.
- Effective Tax Rate
- Your effective tax rate is your total tax divided by your total income. Example: $9,000 tax ÷ $80,000 income × 100 = 11.25%.
Effective tax rate
Additional taxes
State Taxes & FICA
- State Income Tax
- State income tax varies widely. Some states have no state income tax, some have flat tax rates, and others use progressive tax brackets. Your calculator should include state selection, filing status, state taxable income rules, and local taxes where applicable.
- FICA Taxes
- Income tax is not the only tax that affects take-home pay. Many workers also pay payroll taxes for Social Security and Medicare. A calculator should show these separately to give a complete picture of after-tax income.
Tax planning
Tax Credits vs Tax Deductions
- Tax Deduction
- Reduces taxable income. Example: A $1,000 deduction does not reduce tax by $1,000. It reduces the income that gets taxed.
- Tax Credit
- Reduces the tax bill directly. Example: A $1,000 tax credit can reduce tax owed by $1,000, depending on the credit rules.
Refund estimate
Tax Refund or Tax Due
A tax refund or tax due depends on the difference between final tax liability and payments already made.
Refund or tax due
Use cases
Popular Calculator Use Cases
- Take-Home Pay
- Shows money left after all taxes and deductions for annual, monthly, biweekly, or weekly periods.
- Self-Employed Users
- Considers business income, expenses, self-employment tax, estimated payments, and special deductions.
- Pre-Tax Deductions
- Shows how 401(k), HSA, FSA, and health insurance premiums can reduce your taxable income.
How to use
How to Use This Calculator
- 1
Choose the tax year & filing status.
- 2
Enter your gross income & other income.
- 3
Choose standard or itemized deduction.
- 4
Add adjustments & pre-tax deductions.
- 5
Add tax credits & select your state.
- 6
Enter withholding to estimate refund/due.
- 7
Review taxable income, tax owed, rates, and take-home.
Common Income Tax Calculator Mistakes
Confusing Gross and Taxable
Brackets apply to taxable income, not total gross income.
Misunderstanding Brackets
Only the income in each bracket is taxed at that rate.
Ignoring State/FICA Taxes
Federal tax is only one part of the picture.
Mixing Deductions & Credits
Deductions reduce income. Credits reduce tax owed.
Ignoring Withholding
Refund/due depends on tax liability vs withholding.
Treating as Final Advice
A calculator is for planning. Actual filing has more details.
Frequently Asked Questions
An income tax calculator estimates how much tax you may owe based on income, filing status, deductions, credits, tax year, and state.
Yes. It estimates federal income tax using the selected year's brackets. It should also include state tax if you select a state, though rules vary.
Taxable income is the income left after eligible adjustments and deductions (like the standard deduction) are subtracted from your gross income.
For 2026, the IRS standard deduction is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for heads of household.
For 2026, federal marginal tax rates are 10%, 12%, 22%, 24%, 32%, 35%, and 37%.
Because the U.S. federal income tax system is progressive. Lower portions of your income are taxed at lower rates, meaning your overall effective rate is an average and lower than your top marginal rate.
Yes, if the calculator includes federal withholding, state withholding, estimated payments, and credits, it can estimate whether you will receive a refund or owe tax.
No. It is an estimate. Actual tax depends on full tax return details, IRS rules, state rules, deductions, credits, and filing information.
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