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​Corporate estimated t​ax

Oregon’s estimated tax laws are not the same as federal estimated tax laws. You must make quarterly estimated tax payments if you expect to owe $500 or more in tax for the year (See ORS 314.505 and supporting administrative rules).

If you don't make estimated tax payments as required, you may be subject to interest on underpayment of estimated tax (UND).

Payment options

Estimated payments can be made using one of these options:

You must make your Oregon estimated payments by EFT if you’re required to make your federal estimated payments by EFT. If this requirement creates a disadvantage for you, you may be eligible for a waiver. See ORS 314.518 and OAR 150-314-0310, or call us for more information.

If you don’t meet the federal requirements for mandatory EFT payments, you can participate on a voluntary basis.

Payment due dates

Estimated tax payments are due quarterly, as follows:
  • Calendar year filers: April 15, June 15, September 15, and December 15.
  • Fiscal year filers: The 15th day of the 4th, 6th, 9th, and 12th months of your fiscal year.

If the due date falls on a Saturday, Sunday, or legal holiday, use the next regular business day.

See the instructions for Forms​ OR-20, OR-20-INC, OR-20-INS, and OR-20-S for additional information and requirements, including how to calculate your next year's estimated tax.