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