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 your deadlines is essential—whether you're a full-time Mississippi resident, part-year filer, or someone operating a business in the state.

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.

Does Mississippi Require a Tax Extension Form?

Mississippi automatically grants a 6-month extension to file your tax return.

 You do NOT need to submit a separate extension form if you do not owe additional taxes.

 However, if you owe taxes and have not prepaid at least 80% of your liability, you must submit Form 80-106 and make a payment by April 15.

 If you filed a federal extension (Form 4868), attach a copy when filing your Mississippi return.

Payment Requirements

You are required to make estimated payments if your total Mississippi tax liability exceeds $200 and you have not prepaid at least 80% of that liability through withholding.

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

Extended Filing Deadline: October 15th, 2026

Business Tax Deadlines:

• C Corporations: April 15th
• Extended Filing for C Corporations: October 15th, 2026
• S Corporations and Partnerships: May 15th
• Extended Filing Deadline: November 15th

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. Retain a copy of your timely filed IRS Form 4868 as documentation.

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

For Individuals

Late Payment Penalty

Mississippi imposes both interest and a penalty on late payments.

• Interest: 0.5% per month (6% annually)
• Penalty: 0.5% per month, up to 25% of the unpaid amount

Failure to File Penalty:

If you fail to file your return by the extended deadline (October 15) without an extension, you may be charged:

• Penalty: 5% per month, up to 25% of the tax due
• Minimum Penalty: $100
• Note: No interest is applied to the failure-to-file penalty.

For Corporations

Late Payment Penalty (Corporate):

• Interest: 0.5% per month on unpaid tax
• Penalty: 0.5% per month, up to 25% of the unpaid amount

Failure to File Penalty (Corporate):

Corporate filers who miss the deadline without an approved extension are subject to:

• Penalty: 5% per month, capped at 25%, based on the unpaid tax
• Minimum Penalty: $100
• Interest also accrues at 0.5% per month on late payments.

Compare Mississippi Tax Extension Rules to Nearby States

If you live or work across state lines, you may also need to understand how nearby states handle tax extensions:

•  Missouri tax extension
• Louisiana state tax extension
• Alabama tax extension rules
• Arkansas tax extension
• Tennessee extension deadline

 Each state has different rules for payment requirements and whether they require a separate extension form.

File Your Mississippi Tax Extension Today

Get more time to file and avoid costly penalties.

File your extension quickly and make sure your payment is handled correctly.

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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