Oregon State Tax Guide
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Oregon State Tax Guide
Oregon Key deadlines (tax year 2025, return filed in 2026)
- Filing deadline: Apr 15, 2026
- Extension request deadline: Apr 15, 2026
- Extended return deadline: Oct 15, 2026 (6-month extension)
- Payment deadline: Apr 15, 2026
- Differs from federal: No
Any tax you owe must still be paid by the original April 15 deadline to avoid penalties and interest. However, if you expect to owe Oregon income tax, payment must still be made by the original due date to avoid penalties and interest. Taxpayers submitting a payment by mail can use Form OR-40-V. Oregon also offers electronic payment options through its Revenue Online system, where taxpayers can make free ACH bank transfers or pay by major credit cards, although convenience fees may apply to card transactions. For online payments, ACH debit is available at no charge, while Discover, MasterCard, and Visa payments carry a convenience fee.
If the due date for filing your return falls on a. Saturday, Sunday, or legal holiday, your return is due by the next regular working day.
October 15, 2026 (6-month extension)
Relevant Links
Payment rules
Any tax you owe must still be paid by the original April 15 deadline to avoid penalties and interest. However, if you expect to owe Oregon income tax, payment must still be made by the original due date to avoid penalties and interest. Taxpayers submitting a payment by mail can use Form OR-40-V. Oregon also offers electronic payment options through its Revenue Online system, where taxpayers can make free ACH bank transfers or pay by major credit cards, although convenience fees may apply to card transactions. For online payments, ACH debit is available at no charge, while Discover, MasterCard, and Visa payments carry a convenience fee.
Payment options
Payment plan availability
Available: Yes
Filing forms
Regular filing
- IRS Form 4868
- Form OR-40-V - Oregon Individual Income Tax Payment Voucher
Extension
- Publication OR-40-EXT
Oregon Refund Tracking
Do I need to file?
In most cases, Oregon taxpayers do not need to submit a separate state extension request. If you have been granted a federal extension by filing IRS Form 4868, Oregon will automatically honor that extension and extend your state filing deadline to October 15. While no additional paperwork is required to obtain the filing extension, any Oregon income tax owed should still be paid by the original tax deadline to minimize potential penalties and interest charges.
Filing methods
Online filing
Taxpayers who have obtained a valid federal filing extension by submitting IRS Form 4868 automatically receive an extension of time to file their Oregon individual income tax return. No separate Oregon extension request is required. Oregon also offers electronic payment options through its Revenue Online system, where taxpayers can make free ACH bank transfers or pay by major credit cards, although convenience fees may apply to card transactions. For online payments, ACH debit is available at no charge, while Discover, MasterCard, and Visa payments carry a convenience fee.
Mail filing
However, if you expect to owe Oregon income tax, payment must still be made by the original due date to avoid penalties and interest. Taxpayers submitting a payment by mail can use Form OR-40-V.
