West Virginia Sole Proprietorship Tax Deadlines 2026
Complete guide to Sole Proprietorship filing dates, extensions, estimated payment schedules, and required forms in West Virginia for the 2026 tax year. West Virginia imposes a state income tax, so Sole Proprietorship entities must file both federal and state returns.
West Virginia Sole Proprietorship filing deadline
Conforms to the federal calendar-year due date unless the state announces relief.
Due: Apr 15, 2026
Extension: Oct 15, 2026
Form: State income tax return
Estimated payments
Quarterly estimated payment dates: Apr 15, 2026, Jun 15, 2026, Sep 15, 2026, Jan 15, 2027.
Due: Apr 15, 2026
West Virginia Sole Proprietorship Tax Calendar at a Glance
| Event | Date |
|---|---|
| Filing deadline | Apr 15, 2026 |
| Extension deadline | Oct 15, 2026 |
| Q1 estimated payment | Apr 15, 2026 |
| Q2 estimated payment | Jun 15, 2026 |
| Q3 estimated payment | Sep 15, 2026 |
| Q4 estimated payment | Jan 15, 2027 |
FAQ
When is the Sole Proprietorship tax filing deadline in West Virginia for 2026?
The West Virginia Sole Proprietorship tax return is due Apr 15, 2026 for the 2026 tax year. An extension is available until Oct 15, 2026.
Does West Virginia require Sole Proprietorship estimated tax payments?
Yes, West Virginia requires estimated tax payments for Sole Proprietorship entities. The quarterly due dates are: Apr 15, 2026, Jun 15, 2026, Sep 15, 2026, Jan 15, 2027. Penalties may apply if you underpay or miss a deadline.
What form do I file for a Sole Proprietorship in West Virginia?
Sole Proprietorship entities in West Virginia file using Form State income tax return. You can download the form from West Virginia State Tax Department at https://tax.wv.gov.
Can I get an extension for my West Virginia Sole Proprietorship tax return?
Yes. West Virginia allows an extension for Sole Proprietorship returns until Oct 15, 2026. Note that an extension gives you more time to file, not more time to pay — any tax owed is still due by the original deadline of Apr 15, 2026.
What are the penalties for filing late in West Virginia?
West Virginia typically charges a failure-to-file penalty (usually 5% of unpaid tax per month, up to 25%) and a failure-to-pay penalty (usually 0.5-1% per month). Interest also accrues on unpaid balances. Filing for an extension by the original deadline avoids the failure-to-file penalty but not the failure-to-pay penalty.
Where can I file West Virginia Sole Proprietorship taxes?
File through West Virginia State Tax Department. Visit https://tax.wv.gov for e-filing options, downloadable forms, and payment portals.
West Virginia Estimated Tax Payments
View the full quarterly estimated payment schedule for West Virginia, including all entity types and payment methods.
View West Virginia estimated payments →