Kittitas County, Washington property-tax payment and appeal deadlines
Tax bills, payment rules, and valuation-review windows are controlled by the local jurisdiction and the governing state framework. The reviewed record below separates published figures from items that still require confirmation with Kittitas County Assessor; Kittitas County Treasurer collects property taxes.
Rate context
ConfirmKittitas County publishes tax-code-area levy rates rather than one countywide effective rate.
Statement mailing
PublishedMid-February 2026; the official 2026 roll certification notice says statements are expected to be mailed mid-February.
Payment deadline
PublishedApril 30, 2026 for the first half or full payment; October 31, 2026 for the second half.
Valuation protest
PublishedJuly 1, 2026 or within 30 calendar days after the Change of Value Notice was mailed, whichever is later; petition to the Kittitas County Board of Equalization.
Do not assume a grace period.
The reviewed record identifies the payment timing above but does not establish a universal penalty schedule for this page. Late charges, interest, collection costs, tax-sale procedures, and lien or foreclosure timelines can depend on state law and the local collector’s process. If the deadline is close or a balance is delinquent, contact the tax collector directly and request the current payoff amount in writing.
Treat a published payment deadline as a hard operational date and retain your receipt or confirmation number.
From assessment to collection
01Valuation and notice
Review the assessment notice as soon as it arrives. The protest window may run from the notice date rather than from the payment due date.
02Statement and account review
Match the tax statement to the parcel or account number and confirm exemptions, assessed value, taxing units, credits, and balance.
03Payment confirmation
Use the official collector channel, then save the receipt, transaction reference, and date posted. A bank submission is not always the same as a county posting date.