2021 Tax Calculator
Estimate your 2021 federal income tax based on filing status, income, and deductions. Get a breakdown of tax brackets, standard deduction, and estimated tax.
Published by:
isCalculator Editorial Team
Was this calculator helpful?
How to use this tool?
Follow these steps to estimate your 2021 federal income tax:
- Select Filing Status – Choose from Single, Married Filing Jointly, Married Filing Separately, or Head of Household.
- Enter Annual Income – Input your total 2021 income in dollars (e.g., 50000). Must be a non-negative number.
- Enter Deductions – Input your total deductions (standard or itemized) in dollars. The calculator automatically uses the higher of your entered amount or the standard deduction for your status.
- Click "Calculate Tax" – The button triggers the computation.
Results displayed:
- Estimated Federal Tax – Your total tax rounded to two decimals.
- Taxable Income – Income minus the larger of your deductions or standard deduction.
- Tax Brackets Used – Each bracket applied, showing the income range and rate.
- Marginal Tax Rate – The rate on your last dollar of taxable income.
- Effective Tax Rate – Total tax divided by taxable income, as a percentage.
Tip: All inputs must be non-negative numbers. Invalid entries show red error messages.
Previous Results
| Result | Inputs | Date |
|---|
Frequently Asked Questions
This calculator uses the 2021 federal income tax brackets and standard deductions as enacted by the IRS.
No, this calculator only estimates federal income tax. State taxes vary and are not included.
The calculator automatically uses the higher of your entered deductions or the standard deduction for your filing status.
