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Office of Management & Finance

Revenue Bureau

Phone: 503-823-5157

Arts Tax: 503-865-4278

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

More Contact Info

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.

Heartbleed Security Notice

A serious security vulnerability known as "Heartbleed" was recently discovered in OpenSSL, a popular software library commonly used by many websites on the internet to encrypt communication between a user's computer and a web server. is NOT affected by this vulnerability as it does not use the OpenSSL software library. Please rest assured we are dedicated to protecting your security on this website.