Income Tax Calculator Usa 2021
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Reviewed by Calculator Editorial Team
Use this income tax calculator to estimate your 2021 US federal income tax liability. The calculator accounts for the 2021 tax brackets, standard deduction, and FICA taxes. For more precise results, consult a tax professional or use official IRS forms.
How to Use This Calculator
Enter your total taxable income for 2021 in the calculator below. The calculator will automatically compute your federal income tax, Social Security tax (6.2%), and Medicare tax (1.45%).
For married couples filing jointly, enter the combined income. The calculator uses the 2021 tax brackets and standard deduction amounts.
2021 US Tax Brackets
The 2021 federal income tax rates are progressive, meaning higher income levels are taxed at higher rates. Here are the tax brackets for single filers:
| Taxable Income | Tax Rate |
|---|---|
| $0 - $19,900 | 10% |
| $19,901 - $81,050 | 12% |
| $81,051 - $172,750 | 22% |
| $172,751 - $329,850 | 24% |
| $329,851 - $418,850 | 32% |
| $418,851 - $628,300 | 35% |
| $628,301+ | 37% |
Married couples filing jointly use different brackets. The standard deduction for single filers in 2021 was $12,550.
Standard Deduction
The standard deduction reduces your taxable income. For 2021, the standard deduction amounts were:
- Single filers: $12,550
- Married filing jointly: $25,100
- Head of household: $18,800
If your total itemized deductions exceed the standard deduction, you may want to itemize instead of taking the standard deduction.
Example Calculation
Let's calculate the federal income tax for a single filer with $50,000 in taxable income:
- Subtract the standard deduction: $50,000 - $12,550 = $37,450 taxable income
- Calculate tax in each bracket:
- $19,900 × 10% = $1,990
- ($37,450 - $19,900) × 12% = $2,105
- Total federal income tax: $1,990 + $2,105 = $4,095
- Add FICA taxes:
- Social Security (6.2%): $50,000 × 6.2% = $3,100
- Medicare (1.45%): $50,000 × 1.45% = $725
- Total estimated tax liability: $4,095 + $3,100 + $725 = $7,920
Note
This is an estimate. Actual tax liability may differ based on your specific situation and additional deductions or credits.
Frequently Asked Questions
How does the standard deduction affect my tax?
The standard deduction reduces your taxable income by a fixed amount. For 2021, single filers could subtract $12,550 from their income before calculating tax.
What are the 2021 tax brackets for married couples?
Married couples filing jointly used different tax brackets in 2021. The brackets ranged from 10% to 37%, with higher brackets applying to higher income levels.
How do FICA taxes work?
FICA taxes include Social Security (6.2%) and Medicare (1.45%) taxes. These are paid by both employees and employers. The calculator shows the employee portion.
When should I itemize instead of taking the standard deduction?
Itemize if your total itemized deductions (like mortgage interest, charitable donations, and medical expenses) exceed the standard deduction. The calculator doesn't include itemized deductions.