Wisconsin
Wisconsin business compliance calendar
What Wisconsin asks of a company or a nonprofit registered or doing business there, beyond the federal filings every organization owes. Pick your entity type for the full calendar with dates.
LLC 2026LLC 2027C corporation 2026C corporation 2027S corporation 2026S corporation 2027partnership 2026partnership 2027sole proprietorship 2026sole proprietorship 2027nonprofit 2026nonprofit 2027
Registration and franchise filings
| Entity | Filing | Fee | If missed |
|---|---|---|---|
| Corporations | Annual report, by the end of the calendar quarter in which it was formed, with the Wisconsin Department of Financial Institutions | $25 | Administrative dissolution after one year of failure |
| LLCs | Annual report, by the end of the calendar quarter in which it was formed, with the Wisconsin Department of Financial Institutions | $25 | Administrative dissolution after one year of failure |
| Partnerships | Annual report, by the end of the calendar quarter in which it was formed, with the Wisconsin Department of Financial Institutions | $25 | Administrative dissolution after one year of failure |
| Nonprofits | Annual report, by the end of the calendar quarter in which it was formed, with the Wisconsin Department of Financial Institutions | $25 online | Administrative dissolution after one year of failure |
Taxes and employers
- Corporate income tax
- Yes. C corporations file a Wisconsin return by the 15th day of the fourth month after the year ends, with the Wisconsin Department of Revenue.
- Personal income tax
- Yes. S corporations and partnerships file a Wisconsin information return, and employers withhold state income tax.
- Employers
- Register for unemployment insurance and file wage reports every quarter. Reconcile income tax withholding after year end.
- Sources
- Wisconsin Department of Financial Institutions, Wisconsin Department of Revenue
All Wisconsin rules in the pack
- Wisconsin annual reportby the end of the calendar quarter in which it was formed
- Wisconsin annual reportby the end of the calendar quarter in which it was formed
- Wisconsin annual reportby the end of the calendar quarter in which it was formed
- Wisconsin nonprofit annual reportby the end of the calendar quarter in which it was formed
- Wisconsin charitable organization credential renewalby July 31 each year
- Wisconsin charitable organization annual financial reportby the last day of the 12th month after the fiscal year ends (the last day of December for a calendar year)
- Wisconsin corporate income tax returnby the 15th day of the 4th month after the fiscal year ends (April 15 for a calendar year)
- Wisconsin corporate estimated tax paymenton the 15th day of the 4th, 6th, 9th, 12th months of the fiscal year (April 15, June 15, September 15, December 15 for a calendar year)
- Wisconsin pass through entity returnby the 15th day of the 3rd month after the fiscal year ends (March 15 for a calendar year)
- Wisconsin personal income tax return with business incomeby April 15 each year
- Wisconsin unemployment insurance wage reportby the last day of the 1st month after each quarter
- Wisconsin annual withholding reconciliationby January 31 each year
- Wisconsin sales tax returnby the last day of the 1st month after each quarter