Michigan Tax Deadlines
State income tax filing deadlines, extensions, and estimates for 2026.
Michigan Department of Treasury
https://www.michigan.gov/taxes
individual deadline
Due: Apr 15, 2026
Extension: Oct 15, 2026
Form: State income tax return
Conforms to the federal calendar-year due date unless the state announces relief.
Estimated Payments
Sole Proprietorship deadline
Due: Apr 15, 2026
Extension: Oct 15, 2026
Form: State income tax return
Conforms to the federal calendar-year due date unless the state announces relief.
Estimated Payments
Partnership deadline
Due: Mar 16, 2026
Extension: Sep 15, 2026
Form: State partnership return
Calendar-year due date follows federal timing for pass-through entities.
S Corporation deadline
Due: Mar 16, 2026
Extension: Sep 15, 2026
Form: State S-corporation return
Calendar-year due date follows federal timing for pass-through entities.
C Corporation deadline
Due: Apr 15, 2026
Extension: Oct 15, 2026
Form: State C-corporation return
Calendar-year due date follows federal timing for corporations.
Estimated Payments
LLC deadline
Due: Mar 16, 2026
Extension: Sep 15, 2026
Form: State LLC return
Calendar-year due date follows federal timing for pass-through entities.
Nonprofit deadline
Due: May 15, 2026
Extension: Nov 15, 2026
Form: State nonprofit return
Nonprofit annual return generally due the 15th day of the 5th month.
Estimated Tax Payments
View all quarterly estimated payment due dates for Michigan.
FAQ
When are taxes due in Michigan?
Michigan state income tax returns for 2025 are generally due on April 15, 2026, aligning with the federal deadline. However, some entity types such as partnerships and S-corporations have earlier deadlines (March 16, 2026). Check the deadlines above for your specific entity type.
Does Michigan require estimated tax payments?
Yes, Michigan generally requires estimated tax payments if you expect to owe more than a certain threshold in state income tax. Payments typically follow a quarterly schedule. Visit the estimated payments page for Michigan for specific due dates.
What is the Michigan tax extension deadline?
Michigan generally grants a 6-month extension for filing state income tax returns, moving the deadline to October 15, 2026 for most individual filers. Note that an extension to file is not an extension to pay — any tax owed is still due by the original deadline.
What are the Michigan tax rates for 2026?
Michigan tax rates vary by income level and filing status. For the most current rates and brackets, visit Michigan Department of Treasury at https://www.michigan.gov/taxes. Tax rates can change annually based on state legislation.
Does Michigan conform to federal due dates?
Many Michigan deadlines follow the federal calendar. Always confirm on Michigan Department of Treasury.
Where can I file Michigan tax forms?
Visit Michigan Department of Treasury at https://www.michigan.gov/taxes for official forms and e-file options.
Michigan Tax Deadlines by Entity Type
View detailed deadlines for specific business entity types in Michigan.
Sole Proprietorship
Due April 15, 2026 with extension to October 15, 2026.
Partnership
Due March 16, 2026 with extension to September 15, 2026.
S Corporation
Due March 16, 2026 with extension to September 15, 2026.
C Corporation
Due April 15, 2026 with extension to October 15, 2026.
LLC
Single-member LLCs follow April 15; multi-member LLCs follow March 16.
Nonprofit
Due May 15, 2026 with extension to November 15, 2026.
Nearby State Tax Deadlines
Compare tax deadlines with neighboring states.
Popular States
Quick links to the most-searched state tax deadline pages.