Missouri Personal Tax Extension 2026: 2025 Tax-Year Filing Guide
Individual Income Tax · Form MO-1040
Missouri generally grants an automatic extension for individual returns. Missouri accepts a federal extension for individual returns. The 2025 return is due April 15, 2026, and the extended deadline is October 15, 2026. For federal details, see our federal tax extension resources.
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✓ Secure e-filing✓ 24/7 filingMissouri generally grants an automatic extension for individual returns. Missouri accepts a federal extension for individual returns. The 2025 return is due April 15, 2026, and the extended deadline is October 15, 2026.
Last updated: September 12, 2026Missouri Personal Tax Extension: Filing Details
Missouri generally grants an automatic extension for individual returns. Missouri accepts a federal extension for individual returns. The 2025 return is due April 15, 2026, and the extended deadline is October 15, 2026.
Quick Reference: Deadlines and Forms
Use this summary to confirm Missouri filing deadlines, forms, and payment requirements.
| Item | Missouri personal return | Deadline or method |
|---|---|---|
| Original deadline | Form MO-1040 | April 15, 2026 |
| Extended deadline | Automatic with Federal | October 15, 2026 |
| Return form | Form MO-1040 | Use the current form |
| Payment | Form MO-1040V | Due April 15, 2026 |
Frequently Asked Questions
Answers about Missouri personal tax extensions.
Yes. Missouri generally accepts an approved federal extension for the individual return.
File Form MO-1040V by April 15 if Missouri tax is due or you need a Missouri extension without a federal extension.
Pay Missouri tax by April 15; an extension gives more time to file, not to pay.
Check the Missouri Department of Revenue for current forms and instructions.