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Louisiana Business State Tax Extension I C Corporations Filing Guide

N/A  ·  C Corporations  ·  Business Filing Guide

Overview

Louisiana C Corporations are subject to state corporate income tax requirements, administered by the Louisiana Department of Revenue. Louisiana grants an automatic extension tied to an approved IRS extension, making the process simple for businesses that have already filed IRS Form 7004.

Original Filing Deadline

• The original due date for the Louisiana C Corporations return is May 15, 2026. File or remit full payment by this date to remain in good standing.
• Extension Period & Extended Deadline
• Louisiana automatically grants an extension to file, provided you have obtained an approved federal extension from the IRS by filing IRS Form 7004. With a valid IRS extension, the Louisiana extended deadline becomes November 15, 2026. No separate state extension form is required—the federal extension serves as your Louisiana extension.

Payment Is Still Due by Original Deadline

The extension applies to filing only—it is not an extension to pay taxes owed. Any outstanding tax liability must be paid by the original due date of May 15, 2026 to avoid penalties and interest. Pay online using the Louisiana | Online Tax Extension Payment.

Late Filing and Payment Penalties

• Failure to File: 5% of the total tax due per month, subject to a maximum of 25%.
• Failure to Pay: 5% of the total tax due per month, up to a maximum of 25%.

Best Practices

• Estimate and pay your Louisiana business tax by May 15, 2026 to avoid interest and penalties.
• File IRS Form 7004 with the IRS to secure your federal extension, which Louisiana automatically honors.
• Use the state online payment portal for fast, convenient electronic payment.
• Set a reminder to file your completed Louisiana C Corporations return by November 15, 2026.

Final Thoughts

• Louisiana’s business tax extension is straightforward once your federal extension is approved. Pay 100% of any tax due by May 15, 2026 and file your C Corporations return by November 15, 2026.
• Quick Reference Table
• State Abbreviation
• LA
• State Name
• Louisiana
• Business Entity Type
• C Corporations
• Extension Status
• Approved with Federal
• Return Due Date
• May 15, 2026
• Extended Due Date
• November 15, 2026
• Other Information
• Louisiana grants your business an automatic 6-month extension provided you have obtained an approved IRS extension. The extension is NOT an extension to pay any taxes you may have due. Tax payments are due by the original return due date.
• Online Payment
• Louisiana | Online Tax Extension Payment
• Payment Voucher Form
• N/A
• State Payment Agency
• Louisiana Department of Revenue
• Mailing Address with Payment
• N/A
• Failure to File Penalties
• 5% of the total tax due per month, subject to a maximum of 25%.
• Failure to Pay Penalties
• 5% of the total tax due per month, up to a maximum of 25%.

Working with a Tax Professional

Business tax returns are complex—a licensed CPA or Enrolled Agent can maximize deductions, ensure accurate calculations, and handle filing on your behalf. Here's how working with a TaxPro typically goes:

1. 1Get matched with a verified U.S.-based CPA or Enrolled Agent
2. 2Upload your business documents via secure drag-and-drop
3. 3Review and approve your return with upfront, transparent fees
4. 4Your TaxPro files your Louisiana return by November 15, 2026

Quick Reference Table

State Abbreviation	LA
State Name	Louisiana
Business Entity Type	C Corporations
Extension Status	Approved with Federal
Return Due Date	May 15, 2026
Extended Due Date	November 15, 2026
Other Information	Louisiana grants your business an automatic 6-month extension provided you have obtained an approved IRS extension. The extension is NOT an extension to pay any taxes you may have due. Tax payments are due by the original return due date.
Online Payment	Louisiana | Online Tax Extension Payment
Payment Voucher Form	N/A
State Payment Agency	Louisiana Department of Revenue
Mailing Address with Payment	N/A
Failure to File Penalties	5% of the total tax due per month, subject to a maximum of 25%.
Failure to Pay Penalties	5% of the total tax due per month, up to a maximum of 25%.