Taxes 2018 Calculator Usa
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Reviewed by Calculator Editorial Team
Use this calculator to estimate your 2018 US federal income taxes. The calculator follows the 2018 tax laws and provides a simplified estimate. For exact figures, consult a tax professional or use official IRS forms.
How to Use This Calculator
Enter your total taxable income for 2018 and select your filing status. The calculator will compute your estimated federal income tax liability based on the 2018 tax brackets and standard deductions.
This calculator provides an estimate only. Actual tax liability may differ based on your specific circumstances, deductions, credits, and state taxes. Always consult a tax professional for precise tax planning.
How Taxes Are Calculated
The US federal income tax is calculated using progressive tax brackets. Your taxable income is calculated by subtracting your deductions from your total income. The tax is then calculated by applying the tax rates to the portions of your income that fall into each bracket.
Tax Calculation Formula
Tax = (Income × Tax Rate) - Standard Deduction
Where Tax Rate is determined by your filing status and taxable income.
For example, if you earn $50,000 as a single filer, your taxable income would be $50,000 minus the standard deduction ($12,000 in 2018), resulting in $38,000 taxable income. The tax would then be calculated based on the 2018 tax brackets for single filers.
2018 Tax Brackets
The 2018 federal income tax brackets are as follows:
| Filing Status | 10% Bracket | 12% Bracket | 22% Bracket | 24% Bracket | 32% Bracket | 35% Bracket | 37% Bracket |
|---|---|---|---|---|---|---|---|
| Single | $0 - $9,525 | $9,526 - $38,700 | $38,701 - $82,500 | $82,501 - $157,500 | $157,501 - $200,000 | $200,001 - $500,000 | $500,001+ |
| Married Filing Jointly | $0 - $19,050 | $19,051 - $77,400 | $77,401 - $165,000 | $165,001 - $315,000 | $315,001 - $400,000 | $400,001 - $600,000 | $600,001+ |
| Married Filing Separately | $0 - $9,525 | $9,526 - $38,700 | $38,701 - $82,500 | $82,501 - $157,500 | $157,501 - $200,000 | $200,001 - $300,000 | $300,001+ |
| Head of Household | $0 - $13,600 | $13,601 - $51,800 | $51,801 - $82,500 | $82,501 - $157,500 | $157,501 - $200,000 | $200,001 - $500,000 | $500,001+ |
Standard deductions for 2018 were:
- Single: $6,350
- Married Filing Jointly: $12,700
- Married Filing Separately: $6,350
- Head of Household: $9,350
Common Deductions and Credits
In addition to the standard deduction, you may qualify for other deductions and credits that can reduce your taxable income or lower your tax bill. Common examples include:
- Itemized deductions (mortgage interest, state/local taxes, medical expenses, etc.)
- Child Tax Credit
- Earned Income Tax Credit (EITC)
- American Opportunity Credit
- Lifetime Learning Credit
Note: This calculator does not account for itemized deductions or credits. For an accurate estimate, consult a tax professional or use IRS Form 1040.
Filing Options
You can file your taxes using one of several options:
- Paper filing: Complete IRS Form 1040 and related schedules by hand
- Electronic filing: Use IRS Free File or commercial tax software
- Tax professional: Hire a certified public accountant (CPA) or tax preparer
The deadline for filing federal taxes in 2018 was April 17, 2019. If you owe taxes, you may need to make a payment by this date. If you owe less than $1,000, you can pay by mail or online. For larger amounts, you may need to make estimated tax payments throughout the year.
Worked Example
Let's calculate the estimated federal income tax for a single filer with $50,000 in taxable income in 2018.
- Subtract the standard deduction ($6,350) from taxable income: $50,000 - $6,350 = $43,650
- Calculate tax for the first bracket ($0-$9,525 at 10%): $9,525 × 0.10 = $952.50
- Calculate tax for the second bracket ($9,526-$38,700 at 12%): ($38,700 - $9,525) × 0.12 = $3,093.60
- Calculate tax for the third bracket ($38,701-$43,650 at 22%): ($43,650 - $38,700) × 0.22 = $1,077.00
- Add all bracket amounts: $952.50 + $3,093.60 + $1,077.00 = $5,123.10
Therefore, the estimated federal income tax for this single filer would be $5,123.10.
Frequently Asked Questions
How accurate is this calculator?
This calculator provides an estimate based on the 2018 tax laws. For exact figures, use official IRS forms or consult a tax professional. The calculator does not account for state taxes, itemized deductions, or credits.
When is the tax deadline for 2018 taxes?
The deadline for filing federal taxes in 2018 was April 17, 2019. If you owe taxes, you may need to make a payment by this date.
What are the standard deductions for 2018?
The standard deductions for 2018 were $6,350 for single filers, $12,700 for married filing jointly, $6,350 for married filing separately, and $9,350 for heads of household.
Can I use this calculator for state taxes?
No, this calculator only estimates federal income taxes. State tax calculations vary and should be handled separately using state-specific tax forms and calculators.
What if I have itemized deductions?
This calculator uses standard deductions. If you have itemized deductions that exceed the standard deduction, you may qualify for a lower tax bill. Consult a tax professional for precise calculations.