Wisconsin business filing due dates
The Wisconsin deadlines Ordexly tracks for Oct 2026 to Oct 2027. Every date links to the agency page it was checked against (last checked ). Which ones apply to a business depends on its registrations and filing frequency, so confirm with the agency.
Annual report based on formation date
Wisconsin Annual Report (end of formation quarter). WI DFI FAQ / Wis. Stat. 183.0212 — last day of formation calendar quarter (domestic) Official source.
Ordexly works out this date for each business from its formation month.
Annual reports & franchise tax
| Due | Deadline | Source |
|---|---|---|
| Wisconsin Annual Report (calendar-year corporations proxy) 2027 | official source |
Sales & use tax
| Due | Deadline | Source |
|---|---|---|
| Wisconsin ST-12 sales and use tax return (monthly) Sep 2026 | official source | |
| Wisconsin ST-12 sales and use tax return (quarterly) Q3 2026 | official source | |
| Wisconsin ST-12 sales and use tax return (monthly) Oct 2026 | official source | |
| Wisconsin ST-12 sales and use tax return (monthly) Nov 2026 | official source | |
| Wisconsin ST-12 sales and use tax return (annual) 2026 | official source | |
| Wisconsin ST-12 sales and use tax return (monthly) Dec 2026 | official source | |
| Wisconsin ST-12 sales and use tax return (quarterly) Q4 2026 | official source | |
| Wisconsin ST-12 sales and use tax return (monthly) Jan 2027 | official source | |
| Wisconsin ST-12 sales and use tax return (monthly) Feb 2027 | official source | |
| Wisconsin ST-12 sales and use tax return (monthly) Mar 2027 | official source | |
| Wisconsin ST-12 sales and use tax return (quarterly) Q1 2027 | official source | |
| Wisconsin ST-12 sales and use tax return (monthly) Apr 2027 | official source | |
| Wisconsin ST-12 sales and use tax return (monthly) May 2027 | official source | |
| Wisconsin ST-12 sales and use tax return (monthly) Jun 2027 | official source | |
| Wisconsin ST-12 sales and use tax return (quarterly) Q2 2027 | official source | |
| Wisconsin ST-12 sales and use tax return (monthly) Jul 2027 | official source | |
| Wisconsin ST-12 sales and use tax return (monthly) Aug 2027 | official source |
Payroll & withholding
| Due | Deadline | Source |
|---|---|---|
| Wisconsin WT-6 withholding deposit report (quarterly) Q3 2026 | official source | |
| Wisconsin WT-6 withholding deposit report (quarterly) Q4 2026 | official source | |
| Wisconsin WT-6 withholding deposit report (quarterly) Q1 2027 | official source | |
| Wisconsin WT-6 withholding deposit report (quarterly) Q2 2027 | official source |
Unemployment / reemployment
| Due | Deadline | Source |
|---|---|---|
| Wisconsin UCT-101 quarterly contribution report (quarterly) Q3 2026 | official source | |
| Wisconsin UCT-101 quarterly contribution report (quarterly) Q4 2026 | official source | |
| Wisconsin UCT-101 quarterly contribution report (quarterly) Q1 2027 | official source | |
| Wisconsin UCT-101 quarterly contribution report (quarterly) Q2 2027 | official source |
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Nearby: Iowa due dates · Illinois due dates · Michigan due dates · Minnesota due dates
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