Property tax collection for the current year cannot occur until the certification of the roll by the Treasurer's office (with the exception of personal property advance tax and long plat advance tax). At least one-half of the taxes due must be paid or postmarked before April 30th to avoid interest and penalty charges. If the first half is paid on schedule, the time for payment of the remainder is October 31st. Taxes in an amount less than fifty dollars are to be paid in full by April 30th.

The Treasurer's Office accepts a maximum of two bank-rolled rolls of coin.

Make checks payable to the Kittitas County Treasurer. NSF checks will be assessed a $35.00 fee per Resolution 2011-002.

Credit card payments by phone

Call 1-888-877-3565
You will be charged a convenience fee**
Takes most Credit cards, Debit cards & Bank cards
  1. You will need your parcel number and tax amount
  2. Call 1-888-877-3565
  3. Select option 9# for property tax
  4. Press 1 for Real Property Tax,
    Press 2 for Personal Property Tax,
    Press 3 for Water (CID),
    Press 4 for RID,
    Press 5 for Sewer (SUD)
  5. Follow remaining prompts
  6. The system will give you a verbal receipt number if your transaction was completed

Credit card payments by Internet

You will be charged a convenience fee**
  1. Go to
  2. Select local payments and enter your zip code
  3. Follow the prompts

American Express, Discover, MasterCard, VISA
**Convenience fee schedule (subject to change)
   2.5% with a minimum of $3.95.
   For payments larger than $100,000 call 1-888-889-7228.

By mail

Kittitas County Treasurer
205 W 5th AVE STE 102
Ellensburg, WA 98926

In person

Kittitas County Treasurer
Kittitas County Courthouse
205 W 5th AVE STE 102
Ellensburg, WA 98926

View a map or get driving directions.