Why Does My Federal Withholding Vary Each Paycheck?

by Grace Ferguson ; Updated July 27, 2017
Department of the Treasury

An employee is responsible for how much taxes are withheld from his check because the withholding largely depends on the information he supplies his employer. Depending on certain circumstances, his federal withholding may change with each paycheck.

Form W-4

Your federal taxes withheld from each paycheck should be based on your most recent W-4 information.


Your allowances, filing status, income and the IRS withholding tables are also used to calculate your federal tax withholding.


Generally, the more allowances you claim on your W-4, the less federal taxes are withheld from your paycheck. Each time you change your W-4 to reflect more allowances, your paycheck reflects less taxes.


If you are paid commission plus a salary, and the commission gets processed as normal pay, it will place you in a higher tax bracket, changing your federal withholding.

Hourly Employees

If you are an hourly employee and your hours for each pay period are different, the amount of tax withheld varies, because your taxes withheld also depend on your income.

About the Author

Grace Ferguson has been writing professionally since 2009. With 10 years of experience in employee benefits and payroll administration, Ferguson has written extensively on topics relating to employment and finance. A research writer as well, she has been published in The Sage Encyclopedia and Mission Bell Media.

Photo Credits

  • Image by Flickr.com, courtesy of woodley wonderworks