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Updated 2025 Tax Year

Benton County
Property Tax Guide

Everything you need to know about property taxes in Benton County, WA. Rates, due dates, exemptions, and how it affects your monthly payment.

10 Official Sources
8 min read
Quick Facts
Tax Rate
Approximately 7.91% effective rate (varies by taxing district location)
1st Due
Apr 30
2nd Due
Oct 31
Exemptions
4+ Available
Section 1

How Property Tax Works

Benton County, Washington operates under the state's property tax system, which funds essential local services including schools, fire protection, libraries, and county operations. Property taxes are levied on the assessed value of real estate, with the county's effective tax rate of approximately 7.91% as of the 2025 tax year. This rate is significantly higher than Washington's typical base rate of around 1% due to additional levies from various local taxing districts.

The actual tax rate you pay depends on your specific location within Benton County, as different areas are served by various special taxing districts including school districts, fire districts, library districts, and other municipal services. These overlapping jurisdictions create unique tax rate combinations throughout the county. Property owners receive annual tax statements that detail each individual levy component, allowing transparency in how tax dollars are allocated to different public services.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
County General~1.8%Basic county services, roads, administration
School Districts~3.5%K-12 education funding (varies by district)
Fire Districts~0.8%Fire protection and emergency services
Library Districts~0.3%Public library system funding
Port District~0.2%Port of Benton operations
Hospital District~0.5%Public hospital district services
Other Special Districts~0.8%Parks, mosquito control, conservation, etc.
Total Composite Rate~7.91%Combined rate (FY 2025-2026)

Note: These rates represent the 2025-2026 levy year and are approximate averages. Your actual rate may vary based on the specific combination of taxing districts serving your property location within Benton County.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Benton County, property taxes are due in two installments:

First Installment
Apr 30
Delinquent after Dec 10
Second Installment
Oct 31
Delinquent after Apr 10
Pro tip: If you pay through mortgage escrow, your lender splits these payments across your monthly mortgage. If you pay directly, set calendar reminders to avoid late penalties.
Section 4

Supplemental Tax Bills

Supplemental taxes in Benton County are additional property tax bills issued when there are mid-year changes to property ownership or improvements that increase assessed value. The most common triggers include property sales that result in reassessment to current market value, completion of new construction, or significant property improvements like additions or major renovations.

When a supplemental tax is triggered, Benton County calculates the difference between the new assessed value and the previous assessed value, then applies the current tax rate to determine the additional tax owed. This supplemental bill covers the remaining portion of the current tax year from the date of the triggering event. For example, if you purchase a home in July that was previously assessed at $400,000 but sells for $500,000, you would receive a supplemental bill for the additional taxes on the $100,000 increase in assessed value, prorated for the remaining six months of the tax year.

Example Calculation

Example 1: $300,000 Home

  • Market/Assessed Value: $300,000
  • Available Credits Applied: $0 (no application filed)
  • Net Taxable Value: $300,000
  • Annual Tax (7.91%): $2,373
  • Monthly Escrow: $198

Example 2: $600,000 Home with Senior Credit

  • Market/Assessed Value: $600,000
  • Senior Citizens Tax Credit: -$500 (requires annual application)
  • Net Tax After Credit: $4,746 - $500 = $4,246
  • Annual Tax: $4,246
  • Monthly Escrow: $354

Example 3: $1,000,000 Home with Veteran Credit

  • Market/Assessed Value: $1,000,000
  • Disabled Veteran Credit: -$2,000 (requires application and qualification)
  • Net Tax After Credit: $7,910 - $2,000 = $5,910
  • Annual Tax: $5,910
  • Monthly Escrow: $493

Note: All tax credits require separate applications and qualification verification. Credits are not automatically applied and must be renewed as specified by each program's requirements.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Benton County require borrowers to maintain an escrow account for property tax payments, especially when the loan-to-value ratio exceeds 80%. Your lender collects monthly property tax payments along with your mortgage payment, depositing these funds into a dedicated escrow account. The lender then pays your property taxes directly to Benton County when they become due, typically in two installments during the tax year.

Lenders are required to conduct annual escrow analyses to ensure adequate funds are available for tax payments. If your property taxes increase due to reassessment or new levies, your monthly escrow payment will be adjusted accordingly. You'll receive an annual escrow statement showing all deposits, payments, and any shortage or surplus in your account. Property owners can request to have their escrow account removed once they reach 20% equity in their home, but this requires demonstrating a reliable payment history and the financial ability to make large tax payments independently.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
  • See how rising taxes will change your monthly payment
  • Plan ahead instead of being surprised by "shortage" letters
Section 6

Frequently Asked Questions

Q: When are property taxes due in Benton County for the current fiscal year? A: Property taxes for FY 2025-2026 are typically due in two equal installments. The first half is due April 30th and the second half is due October 31st. Payment notices are mailed in February each year.

Q: What tax credits are available and do I need to apply? A: Benton County offers several tax credits including Senior Citizens (ages 61+), Disabled Persons, and Veterans credits. ALL credits require separate applications and must be filed by July 1st preceding the tax year. These are not automatic and reduce your final tax bill, not your assessed value.

Q: How does the Homestead credit work in Washington? A: Washington doesn't have a traditional homestead exemption, but qualifying senior citizens and disabled persons can receive assessment freeze programs that limit annual assessment increases. This requires annual application and income qualification through the county assessor's office.

Q: How often are properties reassessed in Benton County? A: All properties are physically inspected and valued annually by the Benton County Assessor's Office. Assessment notices are typically mailed in April, with appeals due by July 1st to the County Board of Equalization.

Q: What are the penalties for late property tax payments? A: Late payments incur interest charges at a rate set annually by the state, typically around 12% per year. After three years of delinquency, properties may be subject to tax foreclosure proceedings.

Q: Can I pay my property taxes online? A: Yes, Benton County offers online payment options through their treasurer's website at www.co.benton.wa.us. Payments can be made by electronic check or credit card, though credit card payments may include processing fees.

Q: Why do I pay different rates than my neighbor? A: Tax rates vary by location within Benton County based on the specific combination of taxing districts serving your property. Different areas may be served by different school districts, fire districts, or other special purpose districts, creating unique rate combinations.

Q: How do special district taxes work? A: Special districts provide specific services like fire protection, libraries, or parks to defined geographic areas. Each district sets its own levy rate based on service needs and voter approval. Your total tax bill includes charges from all districts serving your property location.

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