Select your pay period from the following options

You can find instructions about income subject to IA withholding here.

Federal withholding amount cannot exceed your taxable wages for a pay period.

This is the actual federal withholding amount on your paycheck.

Additional withholding cannot exceed your taxable wages less your federal withholding for a pay period.Fields notated with * are required.

If you would like to update your Iowa withholding amount for the 2019 tax year, complete the 2019 IA W-4 (44-019) form and file the form with your employer.

Certain circumstances may cause the amount of Iowa withholding tax calculated by the withholding calculator to differ from a taxpayer's paycheck. This could occur if an employer uses the withholding tax tables rather than the withholding formula where the tax tables are based on assumptions about federal withholding that may not match the taxpayer's actual circumstances.