Missouri State Tax Extension
Missouri Personal Tax ExtensionForm MO-60
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File Your Tax Return Now →Missouri Personal Income Tax Extension – Federal Extension Plus No Balance Due
Missouri’s automatic extension has two conditions: a valid federal extension through IRS Form 4868, and no Missouri income tax balance. When both are met, the filing deadline moves from April 15, 2026, to October 15, 2026, with no separate Missouri form required. If you owe Missouri tax, you must take an additional step.
Federal Extension + No Missouri Balance Due
Missouri’s automatic extension applies only when you have a valid federal extension and owe no Missouri income tax. Without both conditions, the automatic extension does not cover you.
File Form MO-60 and Pay in Full by April 15, 2026
If you have a Missouri balance due, file Form MO-60 and pay the full amount by April 15, 2026. The extension alone does not cover taxpayers with unpaid Missouri tax.
When Form MO-60 Is Required
Form MO-60 (Application for Extension of Time to File) must be filed with full payment whenever a Missouri tax balance is due under an extension. If paying online through the Missouri Department of Revenue’s portal, no paper form is required – but full payment must still be made by April 15. Attach a copy of your federal extension when filing your Missouri return by October 15.
Late Filing and Payment Penalties
Missouri imposes 5% per month for both the failure-to-file and failure-to-pay penalties, each capped at 25%. Because both carry the same rate and can apply simultaneously, the combined exposure can reach 50% of unpaid tax. Filing by October 15 and paying any balance in full by April 15 eliminates all exposure.
Best Practices
- ✓File IRS Form 4868 by April 15 – Missouri’s automatic extension requires federal approval.
- ✓If you owe Missouri tax, file Form MO-60 and pay in full by April 15, 2026.
- ✓Pay online at dor.mo.gov or call 1-888-929-0513 (MC, Discover, Visa, Amex accepted).
- ✓Attach a copy of your federal extension when you file your Missouri return by October 15.
Missouri mirrors Maryland in its approach – automatic extension when there’s no balance due, but Form MO-60 and full payment required if you owe. Handle the balance by April 15 and file your return by October 15, 2026.
Quick Reference Table
| Item | Details |
|---|---|
| State Abbreviation | MO |
| Extension Status | Federal Required |
| Return Due Date | April 15, 2026 |
| Extended Due Date | October 15, 2026 |
| Online Payment | Missouri | Online Tax Extension Payment |
| Payment Voucher | Form MO-60 | Application for Extension of Time to File |
| State Payment Agency | Missouri Department of Revenue |
| Failure to File Penalty | 5% of unpaid tax per month, up to 25% |
| Failure to Pay Penalty | 5% of unpaid tax per month, up to 25% |
Extended? Your Missouri Return Deadline Is Coming Up.
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File My Return Securely →Missouri Extension Payment Options
If you owe Missouri income tax, the full amount is due by April 15, 2026. Pay online at dor.mo.gov or by phone at 1-888-929-0513.
Pay Online or by Phone
Visit dor.mo.gov/personal/individual or call 1-888-929-0513. Use your bank routing and account number. A convenience fee per transaction applies.
Pay by Card
Also at dor.mo.gov or 1-888-929-0513. MasterCard, Discover, Visa, and American Express accepted. Convenience fee applies.
Mailing Address with Payment
P.O. Box 3400
Jefferson City, MO 65105-3400
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