Oregon Partnership Tax Deadlines 2026
Complete guide to Partnership filing dates, extensions, estimated payment schedules, and required forms in Oregon for the 2026 tax year. Oregon imposes a state income tax, so Partnership entities must file both federal and state returns.
Oregon 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
Oregon 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 Oregon for 2026?
The Oregon Partnership tax return is due Mar 16, 2026 for the 2026 tax year. An extension is available until Sep 15, 2026.
Does Oregon require Partnership estimated tax payments?
Estimated payments are not typically required at the entity level for Partnership in Oregon, but confirm with Oregon Department of Revenue.
What form do I file for a Partnership in Oregon?
Partnership entities in Oregon file using Form State partnership return. You can download the form from Oregon Department of Revenue at https://www.oregon.gov/dor.
Can I get an extension for my Oregon Partnership tax return?
Yes. Oregon 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 Oregon?
Oregon 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 Oregon Partnership taxes?
File through Oregon Department of Revenue. Visit https://www.oregon.gov/dor for e-filing options, downloadable forms, and payment portals.
Oregon Estimated Tax Payments
View the full quarterly estimated payment schedule for Oregon, including all entity types and payment methods.
View Oregon estimated payments →