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Office of Management & Finance

Revenue Division

Arts Tax: 503-865-4278

Business Taxes: 503-823-5157

111 SW Columbia St, Suite 600, Portland, OR 97201

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Penalty & Interest Calculator

The Revenue Bureau has added a 2011 Penalty & Interest Calculator for tax software developers. Information is available on our Technical Specifications page.

Disclaimer: This is a tool to assist developers in creating and testing penalty and interest calculations. It is a simplified version of the same calculator that is used to calculate penalties and interest as the original Combined Tax Returns are processed. The Revenue Bureau cannot fully guarantee the accuracy of calculations.