2021 Tax Withholding
W-4 Forms (Employee Withholding Certificates)
With changes in federal and state laws, it is imperative that you review your W-4 status at least once a year. Information regarding the Federal W-4 Form can be found on the IRS website. Information for the Iowa W-4 Form can be found at the State of Iowa website.
Please note that University of Iowa cannot provide individual guidance on completion of the W-4 or any related tax implications. We recommend that you contact your tax consultant with any questions you may have.
Social Security Tax
The Social Security withholding tax rate is 6.2%. The 2021 wage limit on which Social Security tax is calculated is $142,800.
The Medicare withholding is 1.45% up to $200,000 and 2.35% for wages received in excess of $200,000.
Federal Income Tax Withholding
Federal tax withholding tables have changed for 2021 based on inflation. Please refer to the IRS Publication 15-T, Federal Income Tax Withholding Methods, for the current tables.
State of Iowa Income Tax Withholding
The Iowa Department of Revenue has issued new income tax withholding tables for 2021 based on inflation. Please refer to the Iowa Department of Revenue site for more information.
State of Illinois Income Tax Withholding
The State of Illinois withholding tax rate is 4.95%.