Thurston 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 Thurston County Assessor; Thurston County Treasurer collects property taxes.
Rate context
ConfirmWashington property-tax rates vary by tax code area and taxing districts; no single countywide effective rate was published by the county.
Statement mailing
PublishedFebruary 9, 2026; Thurston County announced that the Treasurer mailed 2026 property-tax notices that week.
Payment deadline
Published2026: first-half payment due April 30, 2026 and second-half payment due October 31, 2026; Thurston County permits online, mailed, drop-box, and in-person payment.
Valuation protest
Confirmfor a 2026 assessment-year valuation, Thurston County's official appeal rule is the latter of July 1, 2026 or 60 days after the Assessor mailed the Valuation Notice; the local notice controls the exact date.
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.