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Remember Important Tax Dates

2020 2nd Half Due Date

QR code Reminder for June due date
Scan this for a reminder of the June Tax due date!

2021 1st Half Due Date

2021 1st Half Due Date
Scan this for a calendar reminder of the Dec. 2021 due date!

Tax Dates Calendar

  • January 1-Appraisers determine the market value of property
  • January 1- First day to apply for Homeowner’s Exemption or Circuit Breaker benefits for the current year’s taxes.
  • Delinquent notices for the first half of Primary Tax Roll are mailed
  • “Subsequent” (or occupancy) tax roll bills are mailed in January. These bills are typically for the completion of an improvement or structure that is assessed between the fourth Monday in May and October 31st.
  • Assessments not made on the Primary or Subsequent Rolls are sent out no later than the 1st Monday in January of the following year.
  • “Missed” tax roll is mailed in February. This bill is for the assessment of property from the date of an ownership change to December 31st.
  • February 20 – Due date for full-year Subsequent Tax Roll payment or first one-half tax payment without late charge and interest.
  • March 20 – Due date for full-year Missed Tax Roll payment or first one-half tax payment without late charge and interest.
  • Delinquent notices for the first half of Missed Tax Roll are mailed
  • April 15 – Last day to apply for Circuit Breaker Benefits for the current year’s taxes. *

*Please note that the 2021 deadline for Circuit Breaker, Property Tax Deferral, and 100% Service-Connected Disabled Veterans Benefits has been extended to May 17, 2021 for tax year 2021.

  • 4th Monday in May – This is the first day you may submit an appeal of current year assessed property values.
  • Courtesy Reminder Notices for the prior year’s second-half property tax payment are mailed (only to non-bank coded parcels).
  • May 17, 2021- Deadline to apply for property tax relief programs such as Circuit Breaker, Property Tax Deferral, and 100% Service-Connected Disabled Veterans Benefits for eligible applicants.
  • Assessment Notices from the Ada County Assessor’s Office are mailed by the 1st Monday of June for assessed market values.
  • June 20 – Last day to pay prior year second half tax payments on all tax rolls without late charge and interest (calculated back to January 1st).
  • 4th Monday in June – This is the last day to submit a property value assessment appeal.

If the 20th falls on a weekend, the payment will be considered timely the following first business day if postmarked on or before the 20th.

No due dates!

No due dates!

No due dates!

– The Auditor’s Office calculates final tax levies and valuation data.

– The final data is then sent to the Idaho Tax Commission for final review, approval, and certification.

  • The Auditor’s Office provides certified levy rates to the Treasurer’s Office to prepare the current year’s Primary Roll tax bills to be mailed out by the 4th Monday in November.
  • Assessments of property not on the Primary Roll are sent out on the Subsequent Roll no later than the 4th Monday in November.
  • December 20 –  Due date for full-year Primary Tax Roll payment or first one-half tax payment without late charge and interest.