State of Oregon Personal Income Tax Extensions

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General Instructions

Oregon individual income tax returns are due by April 15, in most years. If you cannot file by that date, you can get a state tax extension. An Oregon personal extension will give you 6 more months to file your return, moving the deadline to October 15.

The State of Oregon recognizes the Federal tax extension (IRS Form 4868). Therefore, if you have a valid Federal extension, you will automatically be granted a corresponding Oregon tax extension.

If you don’t have a Federal extension and you owe Oregon income tax, use Form 40-EXT (Application for Automatic Extension of Time to File Oregon Individual Income Tax Return) to request an Oregon-only extension and pay your state tax. Do not file Form 40-EXT if you have a valid Federal extension and you expect to receive an Oregon tax refund.

It’s important to note that a tax extension only gives you more time to file, not to pay. Your Oregon income tax must be fully paid by the original due date (April 15) or else penalties will apply. You can make a state extension payment using Oregon Form 40-EXT, or you can pay online via Oregon’s Electronic Payment Services: www.oregon.gov/dor/ESERV/epayments

For more information, please visit the Oregon Department of Revenue website: www.oregon.gov/DOR

Oregon State Income Tax Payment Forms


Form 40-EXT (Application for Automatic Extension of Time to File Oregon Individual Income Tax Return):


Mail to the following address:

Extension Clerk

Oregon Department of Revenue

P.O. Box 14950

Salem, OR  97309-0950