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Missouri Individual Income Tax Filing deadlines and extensions for 2025.
If you are a resident or have been involved in significant business operations within Missouri, then you might be required to file Missouri State Taxes. We look at the most important tax deadlines and tax extensions for Missouri in 2025.
If your clients are residents or have been involved in significant business operations within Missouri, then they might be required to file Missouri State Taxes. This page outlines important tax deadlines and tax extensions for Missouri in 2025.
Missouri C Corporation Tax Deadlines for 2025
You must file and pay Corporate Income Taxes in Missouri by April 15, 2026.
Extension to File Taxes in Missouri for 2025
The Extension Deadline for Missouri corporate income tax returns is October 15, 2026.
Missouri automatically grants a six-month extension on filing corporate income tax returns. This means you do not need to file for an extension in Missouri.
This is an extension to FILE, not an extension to PAY – payment is still due April 15, 2026.
Missouri S Corporation & Partnership Tax Deadlines for 2025
You must file in Missouri by April 15, 2026.
Extension to File S Corporation & Partnership Taxes in Missouri for 2025
The Extension Deadline for Missouri S Corporation or Partnership income tax returns is October 15, 2026.
Missouri automatically grants a six-month extension on filing pass-through entity tax returns. This means you do not need to file for an extension in Missouri.
This is an extension to FILE, not an extension to PAY – payment is still due April 15, 2026.
Estimated Tax Deadline for Missouri 2025
Estimated tax payments are due:
See Form MO-1040ES instructions for the amount to pay with each voucher.
Individual Tax Deadline for Missouri 2025
You must file and pay Individual Income Taxes in Missouri by April 15, 2026.
Extension to File Taxes in Missouri for 2025
The Extension Deadline for Missouri Individual Income tax returns is October 15, 2026.
Missouri will automatically grant a six-month extension on filing personal income taxes if a federal extension is filed. This means you do not need to file for an extension in Missouri if you file a federal extension and attach the federal extension to the state return. If you do NOT file a federal extension, file Form MO-60.
This is an extension to FILE, not an extension to PAY – payment is still due April 15, 2026.
Estate Tax Deadline for Missouri 2025
Missouri does not have an Estate Tax.
Farmer and Fisherman Taxes for Missouri 2025 If at least 2/3 of your gross income for the taxable year is derived from farming, you may pay estimated tax at any time on or before January 15, 2026. If you wait until January 15, 2026, you must pay the entire balance of the estimated tax. However, if farmers file their tax return on or before March 1, 2026, and pay the total tax at that time, they need not file estimated tax.
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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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