
Missouri Tax Extension: Deadlines, Rules, and How to File
How to file a Missouri state tax extension and avoid penalties
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Quick Answer: Missouri Tax Extension
Missouri accepts a federal tax extension (IRS Form 4868), but only if you do not owe additional state taxes.
If you expect to owe additional Missouri income tax, file Form MO-60 and pay your expected tax due by April 15.
An extension gives you until October 15 to file, but does not extend your payment deadline.
A Missouri tax extension can give you extra time to file your return without the risk of penalties.
However, you must remember that an extension to file does not extend the deadline to pay any taxes owed.
If you don’t pay your expected tax due by the original deadline, you may face penalties. In addition, interest will accrue on any unpaid amount.
Source: Missouri Department of Revenue Form MO-60
So, how do you get a tax extension in Missouri?
Read on for everything you need to know.
Overview of Missouri Tax Extension Requirements
What is a Tax Extension?
A tax extension gives taxpayers more time to file their tax returns without incurring penalties. However, it's essential to note that the extension only applies to the filing deadline. To avoid penalties and interest, pay your expected Missouri tax due by the original April 15 deadline. An extension gives you more time to file, not more time to pay.
Missouri taxpayers who have already filed a federal extension may automatically qualify for a state extension as long as they do not owe additional taxes.
Important Missouri Extension Deadlines and What They Include
When is the Deadline to File a Tax Extension for Missouri?
The deadline to file a Missouri tax extension is April 15. This is also the deadline to pay your expected tax due to avoid penalties and interest.
Does Missouri Accept the Federal Tax Extension?
Missouri partially accepts the federal tax extension.
If you file IRS Form 4868 and do NOT owe additional Missouri taxes, you automatically receive a state extension.
However, if you owe Missouri taxes, you must file Form MO-60 and submit payment by April 15.
Failing to do so may result in penalties and interest.
If I File a Tax Extension for Missouri, What Is My New Deadline?
Once your Missouri tax extension is approved, your new filing deadline will be October 15th for individual and composite income tax returns. Fiduciary and S-Corporation filers will have their deadlines extended based on their federal extension (Form 7004).
How to Request an Extension in Missouri
How Do I File a Missouri Tax Extension?
Here's how to file your Missouri state tax extension:
1. File Form MO-60:
- Visit the Missouri Department of Revenue's website, fill out the form, print and mail. No electronic submission.
- By Mail: Complete Form MO-60 and mail it to the Missouri Department of Revenue at: Taxation Division, P.O. Box 3400, Jefferson City, MO 65105-3400
2. Calculate Your Payment:
Ensure that your expected tax due is paid by the original April 15 deadline. Include payments made through withholding, estimated tax payments, and overpayments from previous years.
Example: If your total tax liability is $10,000 and you have already paid $7,500, you must pay the remaining $2,500 by April 15.
3. Pay:
- Online: Pay using an e-check or credit card via the Missouri Department of Revenue website.
- By Mail: Write a check or money order payable to the Missouri Department of Revenue and include your Social Security Number or FEIN on it.
4. Submit the Form:
- By Mail: Mail your completed form and payment to the address provided above. Be sure to keep a copy for your records.
5. Confirmation:
- You will only be notified if your extension request is denied. Otherwise, assume it is approved if all requirements are met.
Compare Missouri Tax Extension Rules to Nearby States
If you live or work across state lines, you may also need to understand how neighboring states handle tax extensions:
- Kansas tax extension
- Arkansas state tax extension
- Illinois tax extension rules
- Iowa tax extension
- Texas extension deadline
Each state has different requirements for payments, penalties, and whether it accepts federal extensions.
Missouri State Tax Revenue Analysis
The data reflect a mixed economic picture for Missouri. Traditional revenue sources like income and sales tax are declining, potentially due to economic stressors. However, introducing new taxes and growth in other areas like insurance, liquor, and interest are helping balance the state's revenue.
The significant reduction in refunds further improves the state's fiscal position. Missouri's tax revenue diversification appears to provide some cushion against economic fluctuations, but the declines in personal income and sales taxes may signal underlying economic challenges.
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Missouri Tax General Fund Revenue by Tax Type

Missouri Total Collection vs Refunds

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FAQs
Yes, you must pay your expected tax due by the original deadline to avoid penalties and interest. The extension applies only to the filing deadline.

