Corporate Activity Tax registrations top 15,000

Salem, OR—The Department of Revenue reminds business owners and their tax preparers that once their business has earned more than $750,000 in commercial activity for the year, they are required to register for Oregon’s Corporate Activity Tax (CAT) within 30 days.

The CAT applies to all business entity types, such as C and S corporations, partnerships, sole proprietorships, and other entities. More than 15,000 businesses have registered for the CAT since registration opened for the new program in December 2019.

To register go directly to the CAT page of the Revenue website and click on the “Register for the CAT” link in the center of the page.

For those who need help, a short CAT registration training document is available on the page.

To register, individuals doing business in Oregon will need their name and their Social Security number or individual taxpayer identification number. Businesses will need their entity’s legal name and federal employer identification number.
Businesses and individuals will need:
• Their mailing address;
• The date they exceeded or expect to exceed $750,000 in Oregon commercial activity;
• A valid email address or current Revenue Online login, and;
• Their Business Activity Code (Refer to the current list of North American Industry Classification System codes found with their federal income tax return instructions.)
The 2019 Legislature created the CAT to boost funding for public schools. The CAT is imposed on businesses for the privilege of doing business in Oregon, including those located inside and outside of Oregon. It’s measured on a business’s commercial activity—the total amount a business realizes from activity in Oregon.

Registration doesn’t mean a business will owe tax. Only businesses with taxable commercial activity in excess of $1 million must pay the Corporate Activity Tax. The tax is $250 plus 0.57% of taxable commercial activity greater than $1 million after subtractions.

The CAT page of the Revenue website includes links to the administrative rules that govern the tax, a list of basic frequently asked questions (FAQ), and a Beyond the FAQ section that includes high-level summaries of the rules and other topics to help answer taxpayer questions.

Taxpayers with general questions about the CAT can email or call 503-945-8005.

Visit to get tax forms, check the status of your refund, or make tax payments; call 800-356-4222 toll-free from an Oregon prefix (English or Spanish); 503-378-4988 in Salem and outside Oregon; or email For TTY (hearing or speech impaired), call 800-886-7204.