2026 Property Tax Due Dates
Installment 1
April 30
First half
Installment 2
October 31
Second half
Penalty: 3% June 1, +8% December 1Grace period: None
Payment Methods
Online, Mail, In-Person
Benton County Treasurer
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Benton County Treasurer
In Person
Visit the Treasurer's office — 7122 W Okanogan Pl #E110, Kennewick WA 99336, Mon-Fri 8:30am - 4:30pm
Other Counties in Washington
About Benton County
Benton County is a county in the south-central portion of the U.S. state of Washington. As of the 2020 census, its population was 206,873. The county seat is Prosser, and its most populous city is Kennewick.
Source: Wikipedia — content available under CC BY-SA 4.0
Related Resources
Get Deadline Reminders
We'll email you 2 weeks before your property taxes are due.
Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.