Alabama Business Tax Extension 2026: 2025 Tax-Year Filing Guide
LLC & Partnership · S Corporation · C Corporation · Fiduciary
This guide explains the Alabama business tax extension (AL extension) process for each entity type. For federal filing details, see our IRS Form 7004 business tax extension guide. Alabama generally follows the corresponding federal filing and extension dates, while C corporations receive an additional one-month Alabama filing period. Therefore, tax remains due by the original deadline.
Need a pro? Connect with a U.S.-based CPA or EA to prepare and file your Alabama return.
Remember, payment is still due by the original deadline. In other words, extensions only extend filing time.
Alabama (AL) rules depend on entity type. Next, confirm the entity’s classification, file the required extension or retain federal proof when applicable, and pay required tax by the original deadline.
Alabama LLC & Partnership Tax Extension: Filing Details
A calendar-year partnership or LLC taxed as a partnership generally files Form 65, when an Alabama filing obligation applies. The extended deadline for the 2025 calendar-year return is September 15, 2026.
In addition, the extension applies to filing time only. Therefore, pay required Alabama tax by the original deadline to limit penalties and interest.
However, the extension applies to filing time only. In addition, pay required Alabama tax by the original deadline to limit penalties and interest.
Alabama S Corporation Tax Extension: Filing Details
An S corporation generally files Form 20S when it has an Alabama filing obligation. The extended deadline for the 2025 calendar-year return is September 15, 2026.
Alabama C Corporation Tax Extension: Filing Details
A C corporation generally files Form 20C and must follow Alabama corporate-income-tax extension rules. The extended deadline for the 2025 calendar-year return is Dec. 15, 2026.
However, the extension applies to filing time only. In addition, pay required Alabama tax by the original deadline to limit penalties and interest.
However, the extension applies to filing time only. In addition, pay required Alabama tax by the original deadline to limit penalties and interest.
Fiduciary, Estate, and Trust Filing Details
Finally, a calendar-year estate or trust generally files Form 41 when it has an Alabama fiduciary filing obligation. The extended deadline for the 2025 calendar-year return is Sept. 30, 2026.
Quick Reference: Deadlines and Forms
The table below provides a quick reference to business tax extension resources and return forms.
| Entity Type | Alabama Return Form | Extension Method | Extended Deadline |
|---|---|---|---|
| LLC / Partnership | Form 65 | federal Form 7004 | Sept. 15, 2026 |
| S Corporation | Form 20S | federal Form 7004 | Sept. 15, 2026 |
| C Corporation | Form 20C | federal Form 7004 | Dec. 15, 2026 |
| Fiduciary / Estate / Trust | Form 41 | federal Form 8868 | Sept. 30, 2026 |
Frequently Asked Questions
Quick answers about Alabama business tax extensions – but always confirm the current rules with the Alabama Department of Revenue.
Visit AL DORYes. However, the applicable entity-specific requirements listed above must be satisfied. Alabama grants extensions to LLCs, partnerships, S corporations, C corporations, and fiduciaries, but the rules – including which form to file, how long the extension lasts, and the payment threshold – vary by entity type. If you need an individual rather than business extension, see our Alabama individual tax extension page.
Generally no. In other words, pay required tax by the original deadline and confirm the current state payment rules. An extension of time to file does not extend the time to pay – failing to pay by the original deadline can result in penalties and interest, even if the return is filed within the extended window.
No. Entity types use different Alabama rules. For 2025 calendar-year returns filed in 2026, partnerships and S corporations generally use September 15; fiduciary returns generally use September 30; and C corporations generally use December 15 because Alabama adds one month after the federal extended due date.
Review the Alabama Department of Revenue guidance for the entity’s return. Additionally, the DOR publishes the most current forms (federal Form 7004, Federal Form 8868, etc.) and any changes to extension periods or payment thresholds.
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