2018 Withholding Federal Tax Calculator
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Reviewed by Calculator Editorial Team
Use this calculator to determine how much federal tax was withheld from your paycheck in 2018. The 2018 tax year used the 2017 tax tables and brackets, which were adjusted for inflation. This tool helps you understand your withholding amount and how it relates to your total tax liability.
How the 2018 Withholding Calculator Works
The 2018 withholding calculator estimates the federal income tax withheld from your paycheck during the 2018 tax year. This calculation is based on the 2017 tax tables, which were adjusted for inflation to account for the 2018 tax year.
The calculator uses your gross income, filing status, and number of allowances to determine the withholding amount. It applies the appropriate tax brackets and rates from the 2017 tax tables to estimate your withholding.
Note
This calculator provides an estimate based on the 2017 tax tables. Actual withholding may vary based on your specific payroll deductions and tax withholding forms.
How to Use This Calculator
- Enter your total gross income for 2018 in the "Gross Income" field.
- Select your filing status from the dropdown menu.
- Enter the number of allowances you claimed in the "Allowances" field.
- Click the "Calculate" button to see your estimated withholding amount.
- Review the result and use it to compare with your actual tax liability.
Formula Used
The calculator uses the following formula to estimate federal tax withholding:
Federal Tax Withholding = (Gross Income - (Standard Deduction + (Allowances × Allowance Amount))) × Tax Rate
The standard deduction and allowance amount are based on the 2017 tax tables. The tax rate is determined by applying the appropriate tax bracket to your taxable income.
Worked Example
Let's calculate the estimated federal tax withholding for a single filer with $50,000 in gross income and 1 allowance.
- Gross Income: $50,000
- Filing Status: Single
- Allowances: 1
Using the 2017 tax tables:
- Standard Deduction for Single: $6,350
- Allowance Amount: $4,050
- Taxable Income: $50,000 - ($6,350 + (1 × $4,050)) = $45,600
- Tax Rate for $45,600: 24%
- Estimated Withholding: $45,600 × 24% = $10,944
The calculator would display an estimated federal tax withholding of $10,944 for this scenario.
Frequently Asked Questions
- What is the difference between federal tax withholding and actual tax liability?
- Federal tax withholding is the amount of tax automatically deducted from your paycheck. Your actual tax liability is what you owe based on your total income and deductions. You may owe more or less than your withholding amount.
- How do I adjust my withholding if I need more or less tax taken out?
- You can adjust your withholding by completing Form W-4 with your employer. This form allows you to claim allowances or request additional withholding to match your tax liability.
- Are state taxes included in this calculation?
- No, this calculator only estimates federal tax withholding. State taxes are calculated separately based on your state's tax laws and rates.
- Can I use this calculator for estimated tax payments?
- This calculator provides an estimate of withholding, not estimated tax payments. For estimated tax payments, you should use IRS Form 1040-ES or consult a tax professional.
- How accurate is this calculator?
- This calculator provides an estimate based on the 2017 tax tables. For precise calculations, you should use the IRS tax software or consult a tax professional.