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Updated 2025 Tax Year

Benton County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
Approximately 6.84% effective rate for 2025-2026, varies significantly by taxing district and school district within county
Exemptions
5+ Available
Section 1

How Property Tax Works

Benton County, Iowa operates on a property tax system that serves as the primary funding mechanism for essential local services including schools, county government operations, emergency services, and infrastructure maintenance. The county comprises 14 different communities, each potentially subject to varying tax rates based on their specific taxing districts and local levies. Property taxes in Benton County are assessed annually based on market value as of January 1st of the assessment year, with the local assessor establishing property valuations and classifications.

The effective property tax rate for Benton County is projected to be approximately 6.84% for fiscal year 2025-2026, though actual rates vary significantly by location within the county due to different school districts, municipal boundaries, and special taxing districts. With a median household income of $86,827 and average home values around $182,800, property owners in Benton County typically experience tax burdens that reflect both county-wide services and their specific local district needs. The county auditor determines final levy rates based on budgets from various local taxing authorities and the applicable tax base for each jurisdiction.

Section 2

What Makes Up Your Tax Bill

ComponentRate (per $1,000 assessed value)Description
County General Services~$6.45Basic county operations, roads, public safety
School District LevyVaries by districtK-12 education funding (varies significantly by school district)
Municipal LevyVaries by cityCity services (applies only within incorporated areas)
Debt ServiceVariableBond payments for county infrastructure projects
Special AssessmentsVariableEmergency services, library districts, drainage districts
Total Effective Rate~$68.40Combined rate for FY 2025-2026 (6.84%)

Note: These rates apply to the fiscal year 2025-2026 budget cycle. Actual rates vary considerably by location within Benton County based on school district boundaries, municipal incorporation, and participation in special taxing districts. Contact the Benton County Assessor at (319) 472-2365 for location-specific rates.

Section 3

When Are Property Taxes Due?

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

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 assessments that occur when there are changes in property ownership, new construction, or improvements completed after the January 1st assessment date. These supplemental bills are calculated based on the difference between the previous assessment and the new assessed value, prorated for the remaining portion of the tax year. The county assessor determines when supplemental assessments are necessary and calculates the additional tax due.

For example, if you complete a $50,000 home addition in June after the January 1st assessment date, the assessor will issue a supplemental assessment for the increased property value. If your effective tax rate is 6.84%, the additional annual tax would be approximately $3,420 ($50,000 × 0.0684). Since the improvement was completed halfway through the tax year, you would owe a prorated amount of roughly $1,710 for the remaining six months of the fiscal year. Supplemental tax bills are mailed separately from regular property tax statements and have their own payment deadlines.

Example Calculation

$300,000 Property:

  • Market Value: $300,000
  • Assessed Value: $300,000 (100% of market value)
  • Less: Homestead Credit (if applicable): ~$3,250 taxable value reduction
  • Net Taxable Value: ~$296,750
  • Annual Tax: $296,750 × 0.0684 = $20,296
  • Monthly Escrow: $1,691

$600,000 Property:

  • Market Value: $600,000
  • Assessed Value: $600,000
  • Less: Homestead Credit (if applicable): ~$3,250 taxable value reduction
  • Net Taxable Value: ~$596,750
  • Annual Tax: $596,750 × 0.0684 = $41,616
  • Monthly Escrow: $3,468

$1,000,000 Property:

  • Market Value: $1,000,000
  • Assessed Value: $1,000,000
  • Less: Homestead Credit (if applicable): ~$3,250 taxable value reduction
  • Net Taxable Value: ~$996,750
  • Annual Tax: $996,750 × 0.0684 = $68,176
  • Monthly Escrow: $5,681

Note: Credits require separate applications and are not automatically applied. Actual rates vary by specific taxing districts within Benton County.

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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, particularly for loans with less than 20% down payment. The lender collects monthly escrow payments along with your mortgage payment and holds these funds in a separate account to pay your property taxes when due. Lenders typically collect 1/12th of your annual property tax bill each month, plus an additional cushion amount (usually 2-3 months of payments) to ensure adequate funds are available.

Property taxes in Benton County are paid in two installments: the first half is due by May 15th and the second half by October 31st for the current fiscal year. Your lender will receive the tax bills directly from the county and make payments on your behalf by these deadlines. You should receive an annual escrow analysis statement showing how your tax payments were calculated and any adjustments needed for the following year. If your property taxes increase due to reassessment or rate changes, your monthly escrow payment may be adjusted accordingly. You can verify that your taxes were paid by checking with the Benton County Treasurer's office at (319) 472-2365 or visiting www.bentoncountyia.gov.

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 fiscal year 2025-2026? A: Property taxes are due in two installments: first half by May 15, 2025, and second half by October 31, 2025. The full amount can be paid by April 30, 2025, without penalty.

Q: What homestead tax credits are available and do I need to apply? A: The homestead credit provides approximately $3,250 in taxable value reduction for properties used as primary residences. You MUST file an application with the Benton County Assessor's office - it is not automatic. The homestead credit also caps assessment increases, helping limit year-over-year tax growth.

Q: Is there a senior citizen property tax credit available? A: Yes, property owners age 65 or older on January 1st may qualify for additional tax credits. You must file a separate application with the assessor's office. Contact (319) 472-2365 for current credit amounts and eligibility requirements.

Q: How often are properties reassessed in Benton County? A: Iowa law requires properties to be assessed annually as of January 1st. However, physical inspections and detailed reassessments typically occur on a rotating basis unless there are significant improvements or market changes.

Q: What happens if I pay my property taxes late? A: Late payments incur interest and penalties. Interest begins accruing immediately after the due date, and additional penalties may apply for significantly delinquent payments.

Q: Can I pay my property taxes online? A: Yes, Benton County offers online payment options. Visit www.bentoncountyia.gov or contact the Treasurer's office at (319) 472-2365 for payment portal information and accepted methods.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with the Benton County Board of Review, typically by May 1st following the assessment. Contact the assessor's office for specific deadlines and required documentation.

Q: Do I pay different rates if I live in a city versus rural Benton County? A: Yes, municipal residents pay additional city taxes on top of county and school district taxes. Rural residents typically pay lower overall rates but don't receive certain municipal services.

Q: What special district taxes might apply to my property? A: Depending on location, you may pay additional taxes for emergency services, library districts, drainage districts, or other special assessments. These vary significantly by area within Benton County.

Q: Do all tax credits and exemptions require applications? A: Yes, virtually all property tax credits require separate applications and are not automatically applied. This includes homestead credits, senior credits, and disability exemptions. Applications typically have annual deadlines and must be renewed periodically.

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