2025 Mississippi State Tax Deadlines
Mississippi Individual income tax filing deadlines and extensions for 2025.
If you are a resident or have been involved in business operations within Mississippi, you might be required to file Mississippi State taxes. Mississippi is implementing income tax rate cuts for 2025 as part of ongoing tax reform efforts, with rates being reduced across all brackets. This comprehensive guide outlines the key tax deadlines and considerations applicable to Mississippi in 2025.
Mississippi business tax deadlines for 2025
C Corporations' deadlines and requirements
C Corporations in Mississippi must file and pay Corporate Income Taxes by April 15, 2025.
Filing requirements include:
- Complete Mississippi Corporate Income Tax Return
- File online through the official Mississippi Department of Revenue website
- File by mail must be postmarked by the due date
- Payment must be made by April 15, 2025
Extension to file taxes in Mississippi for 2025
The Extension Deadline for Mississippi Corporate income tax returns is October 15, 2025. Mississippi grants automatic extensions for filing Corporate income tax returns without requiring separate forms. This is an extension to FILE, not an extension to PAY—payment is still due April 15, 2025.
Pass-through entities
Mississippi S Corporations and Partnerships tax deadlines for 2025
S Corporations and Partnerships must file in Mississippi by March 15, 2025.
Required forms include:
- Mississippi S Corporation Tax Return
- Mississippi Partnership Tax Return
Extension to file S Corporations and Partnerships taxes in Mississippi for 2025
The Extension Deadline for Mississippi S Corporations and Partnerships returns is September 15, 2025. Mississippi automatically grants a six-month extension for filing pass-through entity tax returns without requiring separate applications. This is an extension to FILE, not an extension to PAY—payment is still due March 15, 2025.
Mississippi Individual tax considerations for 2025
Filing requirements and income thresholds
Mississippi Individuals must file a State income tax return if they are Mississippi residents with income above certain thresholds or nonresidents with Mississippi-source income.
The 2025 filing thresholds are based on federal filing requirements:
- Single taxpayers - $13,850
- Married filing jointly - $27,700
- Head of household - $20,800
- Married filing separately - $13,850
Estimated tax deadline for Mississippi 2025
Estimated tax payments are due:
- April 15, 2025
- June 15, 2025
- September 15, 2025
- January 15, 2026
Who must make estimated payments
You must make Mississippi estimated income tax payments during 2025 if you expect to owe $1,000 or more in state income tax after withholding and credits, and your withholding and estimated payments are less than 90% of the current year's tax or 100% of the prior year's tax.
Individual tax deadline for Mississippi 2025
You must file and pay Individual Income Taxes in Mississippi by April 15, 2025. Mississippi accepts electronic filing through the official Mississippi Department of Revenue website, significantly saving time and processing efforts.
Available forms include:
- Mississippi Resident Individual Income Tax Return
- Mississippi Part-Year Resident Individual Income Tax Return
- Mississippi Nonresident Individual Income Tax Return
Extension to file taxes in Mississippi for 2025
The Extension Deadline is October 15, 2025, to file your Mississippi Individual Income tax return. Mississippi grants an automatic six-month extension for filing personal income taxes without requiring separate extension applications. This is an extension to FILE, not an extension to PAY—payment is still due April 15, 2025.
What Mississippi tax professionals need to know
Several key considerations make Mississippi's tax landscape unique for 2025. Mississippi is implementing income tax rate reductions as part of ongoing tax reform efforts. The State is also continuing to phase out its Corporate franchise tax, with full repeal scheduled for 2028.
Electronic filing requirements
Mississippi provides electronic filing options:
- Official Mississippi Department of Revenue website
- Certified tax software integration
- Professional tax preparation services with electronic submission
Corporate franchise tax phase-out continues
Mississippi is continuing to phase out its Corporate franchise tax (capital stock tax). The rate decreased to 50 cents per $1,000 of capital in excess of $100,000, reduced from 75 cents, with full repeal scheduled for January 1, 2028.
Mississippi's unique tax features for 2025
Income tax rate reductions
Mississippi is implementing income tax rate cuts for 2025 as part of ongoing tax reform efforts, reducing rates across all brackets to provide tax relief for residents.
No estate tax
Mississippi does not impose a state estate tax, making it attractive for estate planning purposes compared to states that do impose such taxes.
Agricultural considerations
Mississippi's significant agricultural sector receives various tax benefits, including special valuations for agricultural land use and exemptions that can impact both farming operations and Individual income for those employed in agricultural industries.
Gaming industry impact
Mississippi's casino gaming industry presents unique tax considerations, including gaming taxes, employment opportunities, and tourism-related economic activity that impact the state's overall tax structure and Individual employment in the hospitality sector.
Sources
- Mississippi Department of Revenue
- Mississippi Individual Income Tax Due Date
- Mississippi Tax Information
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The material discussed on this page is meant for general illustration and/or informational purposes only and is not to be construed as investment, tax, or legal advice. You must exercise your own independent professional judgment, recognizing that advice should not be based on unreasonable factual or legal assumptions or unreasonably rely upon representations of the client or others. Further, any advice you provide in connection with tax return preparation must comply in full with the requirements of IRS Circular 230.
Please note that if any due date falls on a federal or state holiday or weekend, it may be adjusted to the next business day. Always verify current deadlines with the appropriate tax professional and authorities.
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