Ohio LLC Tax Deadlines 2026
Complete guide to LLC filing dates, extensions, estimated payment schedules, and required forms in Ohio for the 2026 tax year. Ohio imposes a state income tax, so LLC entities must file both federal and state returns.
Ohio LLC filing deadline
Calendar-year due date follows federal timing for pass-through entities.
Due: Mar 16, 2026
Extension: Sep 15, 2026
Form: State LLC return
Estimated payments
No state estimated payment schedule listed.
Due: N/A
Ohio LLC Tax Calendar at a Glance
| Event | Date |
|---|---|
| Filing deadline | Mar 16, 2026 |
| Extension deadline | Sep 15, 2026 |
FAQ
When is the LLC tax filing deadline in Ohio for 2026?
The Ohio LLC tax return is due Mar 16, 2026 for the 2026 tax year. An extension is available until Sep 15, 2026.
Does Ohio require LLC estimated tax payments?
Estimated payments are not typically required at the entity level for LLC in Ohio, but confirm with Ohio Department of Taxation.
What form do I file for a LLC in Ohio?
LLC entities in Ohio file using Form State LLC return. You can download the form from Ohio Department of Taxation at https://tax.ohio.gov.
Can I get an extension for my Ohio LLC tax return?
Yes. Ohio allows an extension for LLC returns until Sep 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 Mar 16, 2026.
What are the penalties for filing late in Ohio?
Ohio 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 Ohio LLC taxes?
File through Ohio Department of Taxation. Visit https://tax.ohio.gov for e-filing options, downloadable forms, and payment portals.
Ohio Estimated Tax Payments
View the full quarterly estimated payment schedule for Ohio, including all entity types and payment methods.
View Ohio estimated payments →