Rate Breakdown

Property taxes in Benton County are calculated by multiplying the assessed value (minus exemptions) by the total local millage rate.

How Property Tax Works in Benton County

Property taxes in Benton County are determined by a combination of the property's Assessed Value (AV) and the total millage rate applied to that value. The County Assessor determines the AV based on the Real Market Value (RMV) of the property, though Oregon law generally limits how much the assessed value can increase annually to ensure stability for homeowners.

Millage rates represent the amount of tax paid per $1,000 of assessed value. These rates are set by various local taxing districts, including the county, city governments, school districts, and special service districts (such as fire or water). To calculate your estimated tax, multiply the assessed value by the total millage rate and divide by 1,000.

Available Exemptions

Oregon offers several programs to reduce the tax burden on eligible homeowners. While these may not eliminate taxes entirely, they can significantly lower the final amount due:

• Homeowner Property Tax Deferral: Available to seniors (62+), disabled individuals, and surviving spouses, allowing them to defer a portion of their property taxes until the property is sold.
• Disabled Veterans Exemption: Qualified disabled veterans may be eligible for a significant reduction or total exemption of property taxes on their primary residence.
• Agricultural Exemptions: Land used primarily for farm use may qualify for lower "exclusive farm use" valuations.

Payment Schedule & Deadlines

Benton County property taxes are typically billed annually, though payments are split into two installments to make the cost more manageable:

• First Installment: Due November 15th.
• Second Installment: Due March 15th.

Payments can be made online, by mail, or in person at the Benton County Treasurer's office. It is critical to meet these deadlines; payments received after the due date are subject to late penalties. If taxes remain unpaid for an extended period, the property may eventually be subject to a tax foreclosure sale.

Appealing Your Assessment

If you believe your property's Real Market Value (RMV) has been incorrectly assessed, you have the right to appeal. The appeal process must be initiated within a specific window—typically after the Assessor mails the Notice of Value.

To start an appeal, you must file a formal petition with the Board of Property Tax Appeals (BOPTA). You will be required to provide evidence supporting your claim, such as recent appraisals, sales data of comparable properties in your neighborhood, or documentation of property damage that lowers the value. If a resolution is not reached with the board, the case may be further appealed to the Oregon Tax Court.