Calendar & Important Dates

Important Dates — Property Tax Calendar

The following dates and deadlines are provided to assist property owners in Alameda County. Dates marked with an asterisk (*) may shift to the next business day if they fall on a Saturday, Sunday, or legal holiday.

• January 1
  Annual Lien Date. All taxable property is assessed as of 12:01 a.m.
• *February 15
  Deadline to file exemption claims for homeowners, veterans, disabled veterans, welfare, cemetery, college, exhibitions, and churches.
• April 1
  Due date for filing Business Personal Property statements.
• *April 10
  Last day to pay second installment of secured property taxes without penalty.
• *May 7
  Last day to file a Business Personal Property statement without a 10% penalty.
• July 1
  Assessment roll delivered by Assessor to County Auditor-Controller. Start of the new assessment roll year.
• July 2
  First day to file assessment appeal applications with the Clerk of the Board of Supervisors.
• Mid-July
  Annual mailing of assessment notices to all Alameda County real property owners.
• *August 31
  Regular roll unsecured taxes due.
• September 15
  Filing deadline for Assessment Appeals with the Clerk of the Board of Supervisors.
• *December 10
  Last day to pay first installment of secured property taxes without penalty. Also the deadline for filing late exemption claims for homeowners, veterans, and disabled veterans.

* If date falls on a Saturday, Sunday, or legal holiday, mail postmarked on the next business day shall be deemed on time.