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Important Dates


January 1, 12:01 a.m.

Lien Date; the time when taxes become a lien on property and when property is valued for tax purposes. Property is assessed to the person/entity owning, claiming, possessing, or controlling it on January 1.


February 15

Exemption Filing Deadline; last day to timely file


April 10

Last day to pay second installment of secured taxes without penalty


May 7

Last day to timely file property statement without penalty


May 16 – August 31

Filing period for Senior Citizens Tax Assistance


July 1

County assessors deliver completed assessment roll to the county auditor


July 2 – November 30

Filing period with clerk of County Board of Supervisors for reduction in assessed value (Note: final filing date is for San Joaquin County. If you have property in another county, check with them for their final date to file.)

On or before August 1 Unsecured tax bills mailed, reflects lien date value


August 1

Last day to file for Aircraft of Historical Significance Exemption to receive 80% of exemption


August 31

Last day to pay unsecured taxes without penalty

On or before November 1 Secured tax bills mailed, reflects lien date value


December 10

Last day to pay first installment of secured taxes without penalty

Last day to file for homeowners’, veterans’, and disabled veterans’ exemption to receive 80 percent of exemption


December 31

Last day to file for other exemptions to receive 90 percent of exemption






Assessor's Office

44 North San Joaquin Street
Second Floor Suite 230
Stockton, CA 95202
Phone: (209) 468-2630
Fax: (209) 468-8383
Office Hours: 8:30 - 4: 30