West Virginia Business Tax Extension 2026: 2025 Tax-Year Filing Guide
LLC & Partnership · S Corporation · C Corporation · Fiduciary
This guide explains how to file an West Virginia (WV) business tax extension for each entity type. For federal filing details, see our IRS Form 7004 business tax extension guide. West Virginia generally follows the corresponding federal filing and extension dates, while C corporations receive an additional one-month West Virginia filing period. Tax remains due by the original deadline.
Need a pro? Connect with a U.S.-based CPA or EA to prepare and file your West Virginia return.
Remember, payment is still due by the original deadline. In other words, extensions only extend filing time.
West Virginia (WV) 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.
West Virginia LLC & Partnership Tax Extension: Filing Details
A calendar-year partnership or LLC taxed as a partnership generally files PTE-100, when a West Virginia filing obligation applies. For the 2025 calendar-year return, the extended filing deadline is September 15, 2026.
In addition, the extension applies to filing time only. Therefore, pay required West Virginia tax by the original deadline to limit penalties and interest.
The extension applies to filing time only. Pay required West Virginia tax by the original deadline to limit penalties and interest.
West Virginia S Corporation Tax Extension: Filing Details
For an S corporation, a calendar-year business generally files PTE-100 when it has a West Virginia filing obligation. For the 2025 calendar-year return, the extended filing deadline is September 15, 2026.
West Virginia C Corporation Tax Extension: Filing Details
For a C corporation, a calendar-year business generally files CIT-120 and must follow West Virginia corporate-income-tax extension rules. For the 2025 calendar-year return, the extended filing deadline is Oct. 15, 2026.
The extension applies to filing time only. Pay required West Virginia tax by the original deadline to limit penalties and interest.
The extension applies to filing time only. Pay required West Virginia 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 IT-141 when it has a West Virginia fiduciary filing obligation. For the 2025 calendar-year return, the extended filing deadline is Sept. 30, 2026.
Quick Reference: Deadlines and Forms
The table below provides a quick reference to West Virginia business tax extensions and return forms.
| Entity Type | West Virginia Return Form | Extension Method | Extended Deadline |
|---|---|---|---|
| LLC / Partnership | PTE-100 | federal Form 7004 | Sept. 15, 2026 |
| S Corporation | PTE-100 | federal Form 7004 | Sept. 15, 2026 |
| C Corporation | CIT-120 | federal Form 7004 | Oct. 15, 2026 |
| Fiduciary / Estate / Trust | IT-141 | federal Form 8868 | Sept. 30, 2026 |
Frequently Asked Questions
Quick answers about West Virginia business tax extensions – but always confirm the current rules with the West Virginia Department of Revenue.
Visit WV DORYes. However, the applicable entity-specific requirements listed above must be satisfied. West Virginia 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 West Virginia 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 West Virginia 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 West Virginia adds one month after the federal extended due date.
Review the West Virginia 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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