Mississippi Tax Extension: Everything You Need to Know
Your Takeaways:
- Mississippi grants an automatic state tax extension if a federal extension is received.
- Any taxes owed must still be paid by April 15th, 2026, to avoid penalties and interest.
- The extended filing deadline is October 15th, 2025.
- Filing state taxes on time helps you avoid penalties and interest.
- Corporation tax deadlines and essential forms are critical for compliance.
Need more time to file your Mississippi state taxes? Mississippi automatically grants a six-month extension for individuals to file their income tax returns without needing a specific form. A tax extension gives you extra time to submit your return, but remember—it doesn’t delay the deadline to pay any taxes owed.
This guide will walk you through the requirements, deadlines, and steps for filing a Mississippi tax extension.
Overview of Mississippi State Tax Extensions
Mississippi state tax extensions are available for individuals and businesses needing more time to file their tax returns.
- For individuals: the state automatically grants a 6-month extension to file personal income tax returns, and no state-specific form is required to request this extension.
- For businesses: the deadlines for filing corporate income tax returns vary depending on the type of business and its tax year.
It’s important to remember that while an extension provides more time to file, it does not extend the time to pay any taxes owed.
Paying your estimated tax liability on time by the original due date is crucial to avoid penalties and interest.
Why File a Mississippi Tax Extension?
Filing a tax extension gives you extra time to file an accurate return. It’s useful if:
- You’re still waiting for important tax forms.
- Your taxes are complicated and need extra attention.
- You’ve already filed for a federal extension and want to align your deadlines.
Understanding individual income tax deadlines is crucial for both residents and part-year residents. Additionally, individuals engaged in significant business operations within Mississippi must comply with specific tax obligations.
While the extension gives more time to file, you must pay your estimated tax liability by April 15th to avoid late payment penalties.
Mississippi Tax Extension Requirements
Automatic Extension with Federal Approval
You automatically get a Mississippi tax filing extension if you receive a federal extension (Form 4868).
When you file, attach a copy of Form 4868 to your Mississippi income tax return.
Important: An extension to file does not extend the time to pay.
- Pay any taxes owed by April 15th, 2026, to avoid penalties and interest.
Filing a Mississippi-Specific Extension
- If you’re not applying for a federal extension, submit Form 80-106 (Mississippi Extension Payment Voucher) by April 15th, 2026.
- It is crucial to file taxes by the relevant deadlines to avoid penalties.
Payment Requirements
You must make estimated payments if you owe more than $200 and haven’t paid at least 80% of your total tax liability.
- Estimated payments must cover at least 80% of what you owe.
Penalties for Late Payments:
- 0.5% interest per month applies to unpaid amounts.
- Avoid penalties by paying on time and ensuring your estimates are accurate.
Important Mississippi Business Tax Deadlines
Tax Payment Deadline: April 15th, 2026
Extended Filing Deadline: October 15th, 2025
Business Tax Deadlines:
- C Corporations: April 15th, 2026
- Extended Filing for C Corporations: October 15th, 2025
- Other Business Entities: May 15, 2025
- Extended Filing for Other Business Entities: November 15, 2025
How to File a Mississippi Tax Extension
Watch How to Use the Online Portal
This video tutorial provides a step-by-step guide to using Mississippi’s online portal for tax filing and payments.
Step-by-Step Guide
1. Calculate Your Estimated Tax Liability: Use your income and deductions to estimate the taxes owed.
2. File a Federal Extension (if applicable): Submit Form 4868 to the IRS and retain proof of approval.
3. Submit Form 80-106 (if not filing a federal extension): Include payment for any taxes owed.
4. Make Your Payment:
- Online: Use the Mississippi Department of Revenue’s online portal. For detailed instructions, watch this video tutorial.
- By Mail: Send Form 80-106 with your check or money order to the address specified.
5. File Your Tax Return by October 15th: Include all necessary forms and documentation.
Penalties and Interest
Late Payment Penalty
- Mississippi charges 0.5% per month as a penalty for unpaid taxes, and interest builds up at 12% per year.
Late Filing Penalty for Corporate Income Taxes
- Late filings without an approved extension are subject to a penalty of 5% per month, up to 25%.
Frequently Asked Questions
Do I Need to Pay Personal Income Taxes When Filing an Extension?
Yes. Even if you file an extension, you must pay the taxes owed by April 15th, 2026. Late payments are subject to penalties and interest.
Does a Federal Extension Automatically Apply to Mississippi?
Yes. Mississippi accepts federal IRS FORM 4686, but you must attach proof of the federal extension when filing your state return.
What Happens If I Don’t File on Time?
If you don’t file on time and don’t have an extension, you could face penalties of up to 25% of the tax you owe, plus interest.
Can I File an Extension If I’m Expecting a Refund?
Yes. Even if you expect a refund, you can file an extension to ensure accuracy in your return.
Mississippi Tax Revenue Insights
Tax Revenue Contributions by Source (FY2023)
In fiscal year 2023, Mississippi’s tax revenues showcased a diverse contribution from various sources, with sales tax leading at $2,734.1 million (36.8%) and individual income tax following at $2,388.4 million (32.2%).
Corporate and franchise taxes use tax, and other smaller sources round out the state’s general fund contributions.
This pie chart visualizes the distribution, emphasizing the critical role of each tax category in supporting state programs and services.
By understanding these revenue sources, taxpayers can appreciate the impact of compliance and how extensions fit into the broader fiscal landscape.
Source: Mississippi 2023 Annual Report
Conclusion
Filing a Mississippi tax extension is a straightforward process that provides valuable extra time to ensure your return is accurate.
Remember that while the filing deadline is extended, any taxes owed must still be paid by April 15th, 2026, to avoid penalties and interest.
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