Income Tax Calculator in Usa 2018
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Reviewed by Calculator Editorial Team
Use this income tax calculator to estimate your 2018 federal income tax liability in the United States. The calculator uses the 2018 tax brackets and standard deduction amounts to provide an accurate estimate of your tax obligation.
How the 2018 US Income Tax Calculator Works
The 2018 US income tax calculator estimates your federal income tax based on your taxable income and filing status. The calculation follows these steps:
- Subtract the standard deduction from your total income to get taxable income
- Apply the progressive tax brackets to the taxable income
- Calculate the total federal income tax owed
This calculator provides an estimate only. Actual tax liability may differ based on your specific circumstances and deductions.
2018 Federal Income Tax Brackets
The 2018 federal income tax brackets for single filers are as follows:
| Taxable Income | Tax Rate |
|---|---|
| $0 - $9,525 | 10% |
| $9,526 - $38,700 | 12% |
| $38,701 - $82,500 | 22% |
| $82,501 - $157,500 | 24% |
| $157,501 - $200,000 | 32% |
| $200,001 - $500,000 | 35% |
| $500,001+ | 37% |
Tax brackets for other filing statuses (married filing jointly, head of household, etc.) are different and can be found in the IRS publication 17.
Standard Deduction for 2018
The standard deduction amounts for 2018 are:
- Single: $6,350
- Married Filing Jointly: $12,700
- Head of Household: $9,350
- Married Filing Separately: $6,350
The standard deduction reduces your taxable income, which can lower your overall tax liability.
Example Calculation
Let's calculate the federal income tax for a single filer with $40,000 in total income:
- Subtract the standard deduction: $40,000 - $6,350 = $33,650 taxable income
- Apply the tax brackets:
- $9,525 × 10% = $952.50
- ($38,700 - $9,525) × 12% = $2,995.80
- ($33,650 - $38,700) × 22% = $1,113.80
- Total tax: $952.50 + $2,995.80 + $1,113.80 = $5,062.10
This example shows the progressive nature of the US tax system, where higher income levels are taxed at higher rates.
Frequently Asked Questions
- Is this calculator accurate for my specific tax situation?
- This calculator provides an estimate based on standard tax brackets and deductions. For precise tax calculations, consult a tax professional or use the IRS tax software.
- Does this calculator include state taxes?
- No, this calculator only calculates federal income tax. State taxes vary by location and are not included in this estimate.
- What if I have itemized deductions instead of the standard deduction?
- This calculator uses the standard deduction. If you have significant itemized deductions, your actual tax liability may be lower than the estimate provided.
- Are there any tax credits I should know about?
- This calculator does not include tax credits. Some common credits include the Earned Income Tax Credit (EITC) and the Child Tax Credit. These can significantly reduce your tax liability.
- When should I file my taxes?
- The IRS recommends filing your taxes by April 15, 2019, for the 2018 tax year. However, you may need to file earlier if you owe a large amount of tax or are due a refund.