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Michigan Individual Income Tax Filing deadlines and extensions for 2025 for tax professionals to reference when working with clients.
If your client is a resident of Michigan or has been involved in significant business operations within the state, they might be required to file Michigan State Taxes. We look at the most important tax deadlines and tax extensions for Michigan in 2025.
If your clients are residents or have been involved in significant business operations within Michigan, they might be required to file Michigan State Taxes. This guide covers important tax deadlines and tax extensions for Michigan in 2025.
Michigan C Corporation Tax Deadlines for 2025
You must file and pay Corporate Income Taxes in Michigan by April 15, 2026.
Extension to File Taxes in Michigan for 2025
Michigan offers a 4-month business extension.The Extension Deadline for Michigan corporate income tax returns is October 15, 2026. To apply for a Michigan extension, file Form 4.
This is an extension to FILE, not an extension to PAY – payment is still due April 30, 2026.
The annual return is due on March 31,2026.
Estimated Tax Deadline for Michigan 2025
Estimated tax payments are due:
See Form MI-1040ES instructions for the amount to pay with each voucher.
Individual Tax Deadline for Michigan 2025
You must file and pay Individual Income Taxes in Michigan by April 15, 2026.
Extension to File Taxes in Michigan for 2025
The Extension Deadline for Michigan individual income tax returns is October 15, 2026.
Michigan automatically grants a six-month extension on filing personal income taxes. This means you do not need to file for an extension in Michigan.
This is an extension to FILE, not an extension to PAY – payment is still due April 15, 2026.
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The material discussed on this page is meant for general illustration and/or informational purposes only and is not to be construed as investment, tax, or legal advice. You must exercise your own independent professional judgment, recognizing that advice should not be based on unreasonable factual or legal assumptions or unreasonably rely upon representations of the client or others. Further, any advice you provide in connection with tax return preparation must comply in full with the requirements of IRS Circular 230.
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