Wisconsin Income Tax Withholding Payment and Filing Requirements
Employers in Wisconsin must conform with these state rules relating to filing income tax withholding returns.
Periodic Returns. Form WT-6 must be filed:
- quarterly by last day of month following end of reporting period
- monthly by last day of month following end of reporting period
- semi-monthly (taxes from the 1st to the 15th of month must be deposited by last day of month and taxes withheld from the 16th to the end of the month must be deposited by the 15th day of the following month)
- annually (Form WT-7) by last day of month following end of reporting period
Annual Reconciliation Returns. Form WT-7 due January 31.
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