2018 Federal and State Tax Withholding Calculator

How to Use This Calculator

To use this calculator effectively:

1. Enter your total annual income in the designated field.
2. Select your filing status (Single, Married Filing Jointly, etc.).
3. Choose your state of residence from the dropdown menu.
4. Click "Calculate" to see your estimated federal and state tax withholding.
5. Review the results and adjust your withholding if needed.

Federal Income Tax Withholding

The federal income tax withholding is calculated based on your annual income and filing status. The 2018 federal tax brackets are as follows:

The standard deduction for 2018 was $6,350 for single filers and $12,700 for married filing jointly. The withholding amount is calculated by applying the tax rates to the taxable income (gross income minus standard deduction).

State Income Tax Withholding

State income tax withholding varies by state. This calculator includes estimates for several states. The exact withholding depends on your state's tax laws and your specific circumstances.

For example, in California, the 2018 tax brackets were:

• 1% on income up to $8,616
• 2% on income from $8,617 to $20,000
• 4% on income from $20,001 to $31,480
• 6% on income from $31,481 to $43,560
• 8% on income from $43,561 to $55,000
• 9.3% on income from $55,001 to $288,500
• 10.3% on income from $288,501 to $340,400
• 11.3% on income from $340,401 to $577,000
• 12.3% on income over $577,000

The standard deduction for California in 2018 was $4,250 for single filers and $8,500 for married filing jointly.

Example Calculation

Let's calculate the tax withholding for a single filer with an annual income of $50,000 in California.

1. Subtract the standard deduction: $50,000 - $4,250 = $45,750 taxable income.
2. Calculate federal tax:
   • $9,525 at 10% = $952.50
   • $29,175 at 12% = $3,501.00
   • $8,050 at 22% = $1,771.00
   • Total federal tax = $952.50 + $3,501.00 + $1,771.00 = $6,224.50
3. Calculate California state tax:
   • $8,616 at 1% = $86.16
   • $11,384 at 2% = $227.68
   • $11,479 at 4% = $459.16
   • $11,475 at 6% = $688.50
   • $1,475 at 8% = $118.00
   • Total state tax = $86.16 + $227.68 + $459.16 + $688.50 + $118.00 = $1,579.50
4. Total estimated withholding = $6,224.50 (federal) + $1,579.50 (state) = $7,804.00