Interest / Penalties / Fees

State law requires the County Treasurer to charge penalty and interest to delinquent property taxes (RCW 84.56.020)

H.B. 1410 adopted by the Washington State Legislature made changes beginning in 2022 to how interest and penalties are calculated on delinquent property taxes:
  • Interest is charged at the rate of 12% per year computed at 1% per month on the full amount of tax owed. 
  • H.B. 1410 suspended the collection of the 3% June 1st and 8% December 1st penalty charges on 2022 property taxes only. 
  • Penalty and interest that has accrued on delinquent property taxes prior to 2022 remains unchanged.
Interest and penalties charged to delinquent property taxes prior to 2022 are calculated as follows:
   
  • Interest is charged at the rate of 12% per year computed at 1% per month on the full amount of tax owed.
  • Penalty is charged at 3% on the full year amount of tax unpaid on June 1st of the year in which the tax Is due and an additional penalty of 8% on the amount of tax delinquent on December 1st of the year in which the tax is due.
Note: Stormwater, Flood and Irrigation are not assessed penalty. Aquifer is not assessed interest or penalty.

If our office has mailed the tax statement to the address provided by the taxpayer or the taxpayer's agent (such as a closing attorney) under Washington law, we cannot waive the interest and/or penalty if the payment is late.