2018 Federal Withholding Calculator

Salary or Pension: No Multiply: Annual (ref only):
No Exemptions:    0    1    2    3    4    5    6    7
These tables were derived from Publication 15, Circular E, Employer's Tax Guide from the IRS. If you know the total amount you want to withhold, you can subtract the amount which will be withheld based on marital status and number of exemptions to give an additional withholding amount. If these tables change in subsequent years you will be at least partially protected if you don't change your withholding preference.  The marginal tax bracket and calculated withholding are displayed for zero thru seven exemptions for both single and married taxpayers.

All calculations are done at the annual level (allowable per above publication) and may not be exact due to roundoff error. For example on page 45, an unmarried employee is paid $800 weekly. This employee has in effect a Form W-4 claiming two withholding allowances. This gives $64.67 using weekly tables and $64.64 here.

The following example, also from page 45, is from that publication and reproduces its final answer:

Annual income tax withholding. A married person claims four withholding allowances. She is paid $1,000 a week. Multiply the weekly wages by 52 weeks to figure the annual wage of $52,000. Subtract $16,600 (the value of four withholding allowances for 2018) for a balance of $35,400. Using the table for the annual payroll period on page 47 7(b), $2,481.00 is withheld. Divide the annual tax by 52. The weekly income tax to withhold is $47.71.

If you are experimenting with your annual estimated income from all sources, you may enter it in the "Salary or Pension" field, but then check "No Multiply". For example, someone married claiming three exemptions earns $1200 twice a month plus an additional $3000 each year, but nothing is withheld from the $3000. Entering $1200 semi-monthly gives $20.00 to be withheld and an annual salary of $28,800. To arrive at an additional amount to withhold, enter 31800 as the salary while checking "No Multiply" for a value of $32.50 to withhold. When redoing the original salary, the taxpayer could specify Married & 3 with $12.50 additional withholding per pay period.

Consult a tax professional before submitting a new W-4!!