Federal Income Tax Calculator
Estimate your federal income tax, marginal tax rate, effective tax rate, and after-tax income.
Federal Income Tax Rates and Brackets
The United States uses a progressive federal income tax system. Your income is divided into portions, and each portion is taxed at the rate applicable to its bracket. Moving into a higher bracket does not mean that all your income is taxed at that higher rate.
For tax year 2026, the federal marginal tax rates for most individual taxpayers are 10%, 12%, 22%, 24%, 32%, 35%, and 37%. The income thresholds vary by filing status.
For example, the 2026 brackets for a single filer are:
| Marginal rate | Taxable income |
|---|---|
| 10% | $0–$12,400 |
| 12% | $12,401–$50,400 |
| 22% | $50,401–$105,700 |
| 24% | $105,701–$201,775 |
| 32% | $201,776–$256,225 |
| 35% | $256,226–$640,600 |
| 37% | Over $640,600 |
These thresholds refer to taxable income, not gross salary. Other filing statuses have different brackets. The figures above apply to tax year 2026, for returns generally filed in 2027. If you are calculating a different tax year, use that year’s brackets and deductions.
How Does a Federal Income Tax Calculator Work?
A federal income tax calculator estimates your federal income tax liability using your income, filing status, deductions, and applicable tax rates. A more comprehensive calculator may also account for tax credits, adjustments to income, and other sources of taxable income.
The calculation generally follows these steps:
- Calculate total income. Add relevant income from wages, self-employment, investments, and other taxable sources.
- Subtract eligible adjustments. Certain deductions and adjustments may reduce the income used to calculate your tax.
- Determine taxable income. Subtract the standard deduction or eligible itemized deductions, along with other applicable deductions.
- Apply federal tax brackets. Calculate tax on the portions of taxable income that fall within each bracket.
- Subtract eligible tax credits. Qualifying credits can reduce the tax you owe.
- Account for payments. Subtract federal income tax already withheld and eligible estimated tax payments to estimate whether you may owe more or receive a refund.
A basic federal income tax calculator may estimate only the income tax. A more advanced US tax calculator may include additional taxes or other provisions that affect the final result.
Example: Calculate Federal Income Tax on an $80,000 Salary
Consider a single taxpayer earning $80,000 in annual wages for tax year 2026. Assume the taxpayer takes the $16,100 standard deduction, has no other income or adjustments, and claims no tax credits.
The estimated taxable income is:
Using the 2026 federal income tax brackets for a single filer:
| Taxable income portion | Tax calculation | Tax |
|---|---|---|
| First $12,400 | $12,400 × 10% | $1,240 |
| Next $38,000 | $38,000 × 12% | $4,560 |
| Remaining $13,500 | $13,500 × 22% | $2,970 |
| Estimated federal income tax | $8,770 |
The estimated federal income tax is $8,770 before eligible tax credits and other adjustments that may apply.
The effective federal income tax rate relative to the $80,000 gross salary is approximately:
This example illustrates why your marginal tax rate is not the same as your effective tax rate. Although the taxpayer’s highest marginal rate in this example is 22%, the effective federal income tax rate on gross salary is approximately 10.96%.
This calculation estimates federal income tax only. It does not include Social Security, Medicare, state income tax, or other payroll deductions.
What Is the Difference Between Taxable Income and Gross Income?
Gross income and taxable income are different figures, and the distinction is essential when using a taxable income calculator.
Gross income generally refers to income received before subtracting deductions that are allowed under the applicable tax rules. The precise definition can vary depending on the tax provision being considered.
Taxable income is the amount remaining after applicable deductions and adjustments are applied.
For example, a taxpayer earning $80,000 may have taxable income of $63,900 after taking a $16,100 standard deduction, assuming no other adjustments or deductions.
The standard deduction for tax year 2026 is $16,100 for single filers and married individuals filing separately, $32,200 for married couples filing jointly, and $24,150 for heads of household.
Taxable income can differ significantly from gross income depending on filing status, deductions, adjustments, and other circumstances.
Federal Income Tax vs. State Income Tax
Federal income tax is imposed by the U.S. federal government. State income tax is imposed separately by states that levy such a tax.
Your total income tax burden may include both, depending on where you live, where you work, and the applicable tax rules.
| Tax feature | Federal income tax | State income tax |
|---|---|---|
| Who imposes it? | U.S. federal government | Individual state governments |
| Tax rules | Federal tax law | Rules vary by state |
| Income tax brackets | Federal brackets | Vary by state |
| Standard deductions | Federal deduction rules | Depend on state law |
| Withholding | Generally based on Form W-4 | Depends on the state’s withholding rules |
| Applies in every state? | Federal tax rules apply nationwide, subject to individual circumstances | No; some states do not impose individual income tax |
A federal and state tax calculator can provide a more complete estimate of your income tax burden by combining federal calculations with the applicable state rules.
However, state taxes can differ considerably. Some states have progressive income tax brackets, some have flat rates, and others do not impose a general individual income tax.
Your state tax calculation may also depend on residency, income earned in another state, and credits for taxes paid to other jurisdictions.
Federal Income Tax vs. Payroll Taxes
Federal income tax is only one component of the deductions that may appear on your paycheck.
Employees commonly pay Social Security and Medicare taxes in addition to federal income tax. These payroll taxes are calculated separately and generally are not reduced by the standard deduction used to calculate federal taxable income.
| Tax or deduction | Purpose |
|---|---|
| Federal income tax | Funds federal government operations and programs |
| Social Security tax | Helps fund Social Security benefits |
| Medicare tax | Helps fund Medicare |
| State income tax | Funds state government operations in states that impose it |
| Local income tax | Applies in certain local jurisdictions |
| Insurance and retirement deductions | Cover employee benefits and savings arrangements |
This distinction matters when asking, “How much will I pay in taxes?” A federal income tax estimate may be substantially lower than your total tax-related payroll deductions because it does not necessarily include payroll taxes or state and local taxes.
How to Estimate Your Total Federal and State Taxes
If you want to understand your overall tax burden, use a federal state tax calculator that supports your state of residence and relevant income details.
To obtain a useful estimate, gather the following information:
- Annual salary, hourly wages, and other income.
- Federal filing status.
- Expected deductions and adjustments.
- Eligible tax credits.
- State of residence and relevant work locations.
- Federal and state income tax already withheld.
- Other income sources, where applicable.
A federal and state tax calculator can then estimate federal income tax and state income tax separately, allowing you to see how the two affect your finances.
Remember that a combined calculator may not include every local tax, payroll tax, or special tax provision. Check which items the tool includes before relying on its final result.
When Should You Use a Federal Income Tax Calculator?
A federal income tax calculator can be useful in several situations.
When comparing job offers: Estimate how different salaries may affect your after-tax income.
When reviewing a raise: Determine how a salary increase may change your federal tax liability and effective tax rate.
When planning your budget: Estimate the income available after taxes and other deductions.
When starting a second job: Consider how additional earnings may affect your total annual tax liability and withholding needs.
When earning self-employment income: Estimate potential tax obligations and determine whether estimated tax payments may be necessary.
When planning retirement: Estimate the tax implications of pension income, retirement account distributions, and other taxable income.
When reviewing withholding: Determine whether your current federal withholding may be too high or too low.
For employees, the IRS provides an official Tax Withholding Estimator. It helps eligible users evaluate withholding and make informed decisions about their Form W-4.
Frequently Asked Questions
1. What is a federal income tax calculator?
A federal income tax calculator is a tool that estimates how much federal income tax you may owe based on your income, filing status, deductions, and eligible tax credits. Some calculators also estimate refunds, balances due, or effective tax rates.
2. How much will I pay in taxes on my income?
The amount depends on your total income, filing status, deductions, credits, and other applicable tax rules. If you also want to estimate state income tax, payroll taxes, and other deductions, use a calculator that includes those items rather than relying on a federal income tax estimate alone.
3. What are the federal income tax rates?
For tax year 2026, the seven federal marginal income tax rates for most individual taxpayers are 10%, 12%, 22%, 24%, 32%, 35%, and 37%. The thresholds depend on filing status, and these rates apply to taxable income rather than directly to gross salary.
4. What is the difference between marginal and effective tax rates?
Your marginal tax rate is the rate applied to the next dollar of taxable income within your current bracket. Your effective tax rate measures your total income tax relative to a specified income amount, such as gross income or taxable income.
The two rates are different because progressive tax systems apply different rates to different portions of taxable income.
5. What is a taxable income calculator?
A taxable income calculator estimates how much income remains subject to tax after applicable deductions and adjustments. It can help you understand the amount to which the federal tax brackets are applied.
6. Does a US income tax calculator include state taxes?
Not necessarily. A federal income tax calculator generally focuses on federal income tax. A combined federal and state tax calculator should also account for the applicable state tax rules, but the scope varies by tool.
7. Is a free tax calculator accurate?
A free tax calculator can provide a useful estimate if it uses the correct tax year and relevant tax rules. Its accuracy depends on the information you enter and whether the tool accounts for your deductions, credits, income sources, and other applicable circumstances.
8. Does the standard deduction reduce taxable income?
Yes. The standard deduction generally reduces the amount of income subject to federal income tax. Eligible taxpayers may instead itemize deductions when doing so is more beneficial under the applicable rules.
9. Are federal income tax and Social Security tax the same?
No. Federal income tax and Social Security tax are separate. Social Security tax is a payroll tax calculated under its own rules, generally at 6.2% for employees up to the annual wage limit. Medicare tax is another separate payroll tax.
10. Can a federal income tax calculator estimate my tax refund?
Some calculators can estimate a refund or balance due. They compare estimated tax liability with withholding, eligible estimated payments, and other applicable payments or credits. A refund estimate depends on the accuracy and completeness of the information entered.
11. Does a higher tax bracket mean all my income is taxed at a higher rate?
No. Under the progressive federal income tax system, different portions of taxable income are taxed at different marginal rates. Entering a higher bracket does not automatically mean that all your income is taxed at the highest rate you reach.
12. When should I check my federal tax withholding?
Review withholding when your income changes, you start or leave a job, you get married or divorced, you have a child, or your deductions and credits change. The IRS also recommends reviewing withholding periodically to help avoid an unexpected tax bill or excessive withholding.
Conclusion
A federal income tax calculator helps you estimate how much federal income tax you may owe and how your income, deductions, filing status, and tax credits affect the result.
Whether you need a taxable income calculator, a federal income tax rate calculator, or a combined US income tax calculator, the key is to use the correct tax year and enter accurate information.
For a fuller picture of your finances, distinguish federal income tax from state income tax, Social Security, Medicare, and other payroll deductions. Use official IRS resources to verify current tax rules, and review your withholding whenever your financial circumstances change.
A calculator is a useful planning tool, but your final tax liability depends on your complete tax situation and the rules applicable to the relevant tax year.