US Income Tax Calculator
Estimate U.S. federal income tax, deductions, credits, and your refund or amount due using entered income, withholding, payments, and optional state and local tax.
Modify the values and click Calculate to use
Estimated refund$230.00Combined federal and optional state/local estimate after entered payments and modeled refundable credits
Income and tax details
| Gross income | $80,000.00 |
|---|---|
| Taxable Social Security | $0.00 |
| Adjusted gross income | $80,000.00 |
| Schedule 1-A deduction | -$0.00 |
| Standard deduction | -$16,100.00 |
| Taxable income | $63,900.00 |
| Federal tax before credits | $8,770.00 |
| Nonrefundable credits used | -$0.00 |
| Self-employment tax | $0.00 |
| Additional Medicare tax | $0.00 |
| Net investment income tax | $0.00 |
| Total federal tax | $8,770.00 |
| Estimated state and local tax | $0.00 |
| Federal payments | -$9,000.00 |
| State and local payments | -$0.00 |
| Refundable credits | -$0.00 |
| Estimated refund | $230.00 |
This is an educational estimate, not a prepared Form 1040. Eligibility, AMT, QBI, EITC, premium tax credits, and many special rules are not modeled.
Loading income tax chart...
| Rate | Income in bracket | Tax |
|---|---|---|
| 10% | $12,400.00 | $1,240.00 |
| 12% | $38,000.00 | $4,560.00 |
| 22% | $13,500.00 | $2,970.00 |
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What does the US Income Tax Calculator calculate?
The US Income Tax Calculator converts the values you enter into a structured estimate using the formulas and assumptions documented on this page. Use the result to compare scenarios, review the calculation details, and identify sensitive inputs. Check the guide and formula sections before using the estimate for an important decision.
US Income Tax Calculator at a Glance
- Estimates federal income tax for the supported tax year entered.
- Models wages, business and investment income, deductions, credits, withholding, and estimated payments.
- Compares the standard deduction with modeled itemized deductions.
- Shows an optional state and local planning estimate from the effective rate entered by the user.
History
The modern U.S. individual income tax uses progressive brackets, so income is divided into bands rather than taxed at one rate. Filing status, deductions, credits, investment-income rules, additional taxes, and payments all affect the final return.
Tax calculators turn that sequence into a planning estimate. Because federal thresholds can change by tax year, this calculator keeps its supported rulesets versioned and uses the tax year entered by the user.
What This US Income Tax Calculator Does
The calculator combines entered wages, business income, Social Security benefits, interest, dividends, capital gains, passive income, and other income. It then models adjustments, the larger applicable deduction, progressive federal tax, selected credits, self-employment tax, Additional Medicare Tax, and Net Investment Income Tax.
Withholding, estimated payments, and modeled refundable credits are compared with estimated tax to show a refund or amount due. An entered state and local effective rate creates a separate planning estimate; it does not prepare a state return.
Who Should Use It?
Use this tool for tax-year planning, withholding reviews, estimated-payment scenarios, filing-status comparisons, or understanding how a deduction or income source can affect taxable income. Use realistic inputs and review the US Income Tax Calculator assumptions before relying on this result for decisions.
It is designed for educational estimates, not return preparation. Taxpayers with complex transactions, elections, multiple jurisdictions, or eligibility questions should compare the result with current IRS instructions or a qualified tax professional.
What Problems Does It Solve?
For “What Problems Does It Solve?,” the US Income Tax Calculator organizes the relevant inputs, applies the documented method, and shows a result that can be compared across scenarios. The points below identify the specific considerations and assumptions users should review before relying on the estimate.
- Progressive brackets: applies each rate only to the taxable-income band it covers.
- Deduction comparison: compares modeled standard and itemized deductions.
- Payment reconciliation: compares estimated tax with withholding, payments, and refundable credits.
- Mixed income: separates ordinary income from eligible qualified dividends and long-term capital gains.
- Scenario planning: lets users change income, dependents, deductions, credits, or the supported tax year.
Key Benefits
The calculation inputs remain visible and editable. Results show adjusted gross income, taxable income, federal tax, optional state and local tax, effective and marginal rates, bracket details, and the modeled refund or amount due.
The engine uses the same versioned rules and Decimal.js arithmetic across the calculator, PDF report, formula explanation, and worked examples.
US Income Tax Definitions
- Gross income
- The modeled total of entered taxable income sources, including taxable Social Security benefits.
- Adjusted gross income
- Gross income after the modeled above-the-line adjustments supported by the calculator.
- Taxable income
- Adjusted gross income after supported Schedule 1-A amounts and the larger modeled deduction, limited to zero or more.
- Marginal rate
- The federal rate applied to the last dollar in the modeled ordinary-income brackets.
- Effective rate
- Estimated total tax divided by modeled gross income when gross income is positive.
- Refund
- The modeled excess of entered payments and refundable credits over estimated tax.
- Amount due
- The modeled excess of estimated tax over entered payments and refundable credits.
When to Use It
For “When to Use It,” the US Income Tax Calculator organizes the relevant inputs, applies the documented method, and shows a result that can be compared across scenarios. The points below identify the specific considerations and assumptions users should review before relying on the estimate.
- Before adjusting federal withholding or estimated payments
- When comparing supported filing-status scenarios
- After income, deductions, dependents, or credits change
- When planning for business or investment income
- Before discussing a more complex return with a tax professional
How the Calculation Works
For “How the Calculation Works,” the US Income Tax Calculator organizes the relevant inputs, applies the documented method, and shows a result that can be compared across scenarios. The points below identify the specific considerations and assumptions users should review before relying on the estimate.
- Add supported income sources and taxable Social Security benefits.
- Subtract modeled adjustments to determine adjusted gross income.
- Subtract supported Schedule 1-A amounts and the larger modeled deduction.
- Apply progressive ordinary-income rates and preferential investment-income rates where supported.
- Subtract modeled credits and add supported additional taxes.
- Compare total estimated tax with withholding, estimated payments, and refundable credits.
See the complete US income tax formulas for variables, bracket arithmetic, and assumptions.
Common Income Tax Calculator Mistakes
- Entering take-home pay instead of taxable W-2 box 1 wages.
- Treating withholding as the final tax calculation.
- Entering qualified dividends greater than ordinary dividends.
- Omitting tax-exempt interest when Social Security benefits are entered.
- Using a state and local effective-rate estimate as if it were a completed state return.
- Assuming every deduction or credit is available without checking eligibility.
Frequently Asked Questions
What does this US income tax calculator estimate?
It estimates 2025 or 2026 federal individual income tax, selected credits and additional taxes, refund or amount due, and an optional state/local estimate based on the rate you enter. Review the US Income Tax Calculator assumptions before relying on this result for decisions.
Can I enter the tax year?
Yes. Type 2025 or 2026 in the tax-year field. The calculator selects the corresponding federal brackets, deductions, capital-gain thresholds, and Social Security wage base. Use realistic inputs and review the US Income Tax Calculator assumptions before relying on this result for decisions.
Should I enter gross pay or W-2 wages?
Enter taxable wages expected in Form W-2 box 1. Enter Medicare wages separately because they can differ from taxable wages. For a useful US Income Tax Calculator result, use realistic inputs, compare relevant scenarios, and review the stated assumptions before making a decision.
Does it calculate self-employment tax?
Yes. Positive net business income is used to estimate Social Security and Medicare self-employment tax and the deductible half of that tax. On a joint return, each spouse is calculated separately because each spouse files a separate Schedule SE. Review the US Income Tax Calculator assumptions before relying on this result for decisions.
How are Social Security benefits handled for married filing separately?
Choose whether you lived apart from your spouse for the entire tax year. If not, the standard worksheet generally includes 85% of entered benefits as taxable; living apart all year uses the applicable provisional-income thresholds. Review the US Income Tax Calculator assumptions before relying on this result for decisions.
How does it choose standard or itemized deductions?
The calculator estimates both and uses the larger amount. Itemized deductions include modeled SALT, mortgage interest, charity, qualifying medical expenses, and other entered deductions. Use realistic inputs and review the US Income Tax Calculator assumptions before relying on this result for decisions.
Are qualified dividends and long-term capital gains taxed differently?
Yes. The calculator stacks eligible qualified dividends and positive long-term capital gains above ordinary taxable income and applies the modeled 0%, 15%, and 20% federal rates. Review the US Income Tax Calculator assumptions before relying on this result for decisions.
Does this calculate an exact state tax return?
No. State and local income tax is a planning estimate calculated from the editable effective rate. The displayed refund or amount due combines that optional estimate with federal tax and entered federal, state, and local payments. Review the US Income Tax Calculator assumptions before relying on this result for decisions.
Can I use the result to file my return?
No. This educational estimate does not prepare Form 1040 and omits AMT, QBI, EITC, premium tax credits, and many return-specific rules. For a useful US Income Tax Calculator result, use realistic inputs, compare relevant scenarios, and review the stated assumptions before making a decision.
One Useful Fact About Tax Brackets
Entering a higher federal bracket does not cause every dollar of taxable income to be taxed at that rate. Only the portion inside the higher band uses the higher percentage.
Conclusion
A useful tax estimate starts with the correct supported year, filing status, income records, and payment amounts. Review the result line by line, confirm eligibility separately, and treat the balance as a planning estimate rather than a prepared return.
Use the step-by-step US Income Tax Calculator guide for field instructions and interpretation.
US Income Tax Calculator Disclaimer
Educational estimate only. This calculator does not prepare a return, determine eligibility, or provide tax, legal, or accounting advice.