Withholding Tax Information
Current Tables (effective April 1, 2006)**For use through December 31, 2018** | Updated Tables (effective January 1, 2019)**For use starting January 1, 2019** | |
| Tax Table Instructions Withholding Formula and Instructions | Tax Table Instructions Withholding Formula and Instructions | |
| Excel: All tables PDFs: Weekly | Bi-weekly | Monthly | Semi-monthly | Annual | Excel: All Tables PDFs: Weekly | Bi-weekly | Monthly | Semi-monthly | Annual | |
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Iowa Withholding Tax Reference Information
Copies of W-2s / 1099s sent to Iowa?
Electronic Reporting of Wage Statements and Information Returns
Application For Extension of Time to File Iowa W-2 Wage Statements