Treasurer-Tax Collector
The Treasurer-Tax Collector’s Department operates three divisions - Treasury, Property Tax, and Central Collections. While the activities of each division are unique, the primary purpose of the department as a whole is the collection and cash management of revenue owed to the County, cities, special districts, school districts, and the court system. The department is committed to providing excellent customer service and assuring effective utilization of the public’s tax dollars through a program of performance measurement and management.
Supplemental Property Tax Information

General information

California law requires the reassessment of real property following a change of ownership or the completion of new construction. A reassessment may result in one or more supplemental tax bills being mailed to the property owner. Supplemental taxes are separate and in addition to the annual secured property tax bill.

What are "supplemental"

property taxes?

A supplemental tax bill is a separate bill that reflects the increase or decrease in the assessed value of real property over and above the secured taxes already billed for a particular fiscal year. Supplemental tax bills are generated and mailed throughout the year and the payment due dates vary.

If I receive a supplemental tax bill, will I also receive an annual tax bill?

Yes. Supplemental tax bills are separate from and in addition to the annual secured property tax bill. The Assessor's Office is responsible for reassessing property.

If I pay taxes through an impound account, will my supplemental bill be sent to my lender?

No. Supplemental bills are only mailed to the property owner of record. You should contact your lender to determine whether it will pay the bill on your behalf.

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    Tax Auction 

 Contact Treasurer

Treasurer-Tax Collector

Property Tax Division

Central Collections Division

Treasury Division

 Locations & Hours

9:00 am - 5:00 pm
25 County Center Drive
Suite 125

Oroville, CA 95965

Map of County Complex

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