Payroll Services 2018 Federal Withholding Tax Calculator
Before starting, take a moment to print a copy of your latest Earnings Statement or Paycheck stub so you can easily enter the most accurate values into the calculator.

Total Gross Earnings per Paycheck:

(Required)

*Key figures in dollars and cents. (No commas)
Please complete or results will be distorted.
# of Withholding Exemptions:
(Required)
*Each semi-monthly exemption is worth: $172.90
Please complete or results will be distorted.
Additional Dollar Amount:
Marital Status:
(Required)


NRA written on W4 form:
LESS Tax Deferred Amounts Per Paycheck:

  • Pre-tax parking
  • Dependent care
  • Medical insurance premium
  • Retirement reductions
  • Flexible spending account
  • Supplemental retirement account
Gross Earnings: $ $twage
Withholding Exemptions: ($exemptions * $ $curexrate) $ $tallowance
Additional Amount: $ $taddAmt
Marital Status: $marital_status
NRA written on W4 form: $tnraW4form
Tax Deferred Amounts Per Paycheck:

  • Pre-tax parking
  • Dependent care
  • Medical insurance premium
  • Retirement reductions
  • Flexible spending account
  • Supplemental retirement account
$ $ttaxdefamt
Taxable Gross Wages:
(Subject to Withholding)
($ $twage + $ $tnraW4form ) –
($$ttaxdefamt + $$tallowance) =
$ $ttgw
Federal Income Tax Withheld: ($ $ttgw – $ $bracket) = $$tisw
($$tisw * $per%) = $$tdiff
($$tdiff + $ $flat + $ $taddAmt) =
$ $tfit

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Related Employee Tax Rates:

OASI/Social Security6.20%up to $128,400 for 2018
Medicare1.45% up to $200,000
2.35% over $200,000
PERS Plan I6.00%
PERS Plan II7.38%
PERS Plan III5% to 15%
TRS Plan I6.00%
TRS Plan II5.95%
LEOFF Plan II8.75%
LEOFF Plan III5% to 15%
TIAA/CREF5.00%, 7.50%, or 10.00%