Tax season in Mississippi follows a structured timeline each year. To help residents avoid complications, it is crucial to be aware of key deadlines for 2026.
Mississippi Tax Filing Deadline for 2026
The last date to file federal and state taxes for 2025 is set for April 15, 2026. This information comes from both the Internal Revenue Service (IRS) and the Mississippi Department of Revenue.
Tax Filing Guidelines
If you are filing your tax return by mail, it must be postmarked by the due date to be considered timely. Ensure your envelope is addressed correctly to avoid any issues.
Extensions for Tax Filing
Some individuals may require additional time to organize their tax documents. In such cases, a six-month extension can be requested. To do this, you need to file Form 4868 by the original tax due date. Note that this extension does not apply to the payment deadline.
Penalties for Late Filing
Failing to file taxes on time can lead to significant penalties. The IRS imposes a failure-to-file penalty, which is typically 5% of the total taxes due for each month your return is late, capped at 25%. If your return is over 60 days late, the minimum penalty rises to $525 or the total unpaid taxes, whichever is lower.
Tax Relief for Disaster-Affected Areas
In 2025, some Mississippi counties received extended deadlines due to federally declared disasters. Counties such as Calhoun, Carroll, Covington, and several others were given a new deadline of November 3, 2025, for tax filing and payment.
Tax Relief Information
- Counties that received tax relief include:
- Calhoun
- Carroll
- Covington
- Davis
- Grenada
- Humphreys
- Issaquena
- Itawamba
- Jefferson Davis
- Lee
- Leflore
- Marion
- Montgomery
- Pike
- Prentiss
- Sharkey
- Smith
- Walthall
- Washington
By staying informed about these critical dates and guidelines, Mississippians can navigate the tax season smoothly and avoid unnecessary penalties.
