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Updated 2025 Tax Year

Clay County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
Approximately 8.43% for 2025 levy year, varies by city and special districts
1st Due
Sep 30
2nd Due
Mar 31
Exemptions
5+ Available
Section 1

How Property Tax Works

Clay County, Iowa operates under the state's property tax system to fund essential local services including schools, county operations, cities, and various special districts. Property taxes are the primary source of revenue for these governmental entities, supporting everything from road maintenance and emergency services to public education and library operations.

The property tax rate in Clay County for the 2025 levy year is approximately 8.43%, representing a slight decrease from the previous year. However, your actual tax rate may vary depending on your specific location within the county, as different cities, school districts, and special taxing districts (such as library districts, drainage districts, or emergency services) can add their own levies to the base county rate. Property owners should expect their total effective tax rate to fall within a range based on these local district variations.

All property taxes are calculated based on assessed value, which is determined by the Clay County Assessor's Office. Iowa law requires properties to be assessed at their full market value, though various tax credits may reduce your final tax obligation if you qualify and apply for them.

Section 2

What Makes Up Your Tax Bill

ComponentEstimated RateDescription
County General Fund~2.50%Basic county services, administration, law enforcement
School Districts~4.50%Local school district operations and facilities
City/Municipal~1.00%City services (varies significantly by municipality)
Special Districts~0.43%Libraries, drainage, emergency services, rural improvement
Total Base Rate~8.43%Combined rate for FY 2025-2026

Note: These rates are estimates for the 2025 levy year and apply to taxable assessed value after any applicable tax credits. Actual rates vary by specific location within Clay County based on which municipalities and special taxing districts serve your property. Contact the Clay County Assessor's Office at (712) 262-2488 for your exact tax rate breakdown.

Additional assessments may apply for special improvement districts, TIF (Tax Increment Financing) areas, or voter-approved bond issues within specific areas of the county.

Section 3

When Are Property Taxes Due?

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

First Installment
Sep 30
Delinquent after Dec 10
Second Installment
Mar 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 Clay County are additional property tax bills issued when significant changes occur to a property during the tax year. The most common triggers include new construction completion, major improvements or additions, changes in property ownership that remove existing exemptions or credits, or corrections to assessment errors discovered mid-year.

Supplemental taxes are calculated by determining the difference between the original assessed value and the new assessed value, then applying the current tax rate to that difference. The supplemental bill is prorated based on the number of months remaining in the fiscal year from when the change became effective.

For example, if you complete a $100,000 home addition in January that increases your assessed value by $100,000, and your total tax rate is 8.43%, you would owe a supplemental tax of approximately $8,430 prorated for the remaining months of that tax year. The Clay County Treasurer's Office will mail supplemental tax bills separately from regular property tax bills, and they typically have a 30-day payment deadline from the issue date.

Example Calculation

Example 1: $300,000 Home with Homestead Credit

  • Assessed Value: $300,000
  • Homestead Credit Applied: -$4,850 (estimated)
  • Net Taxable Value: $295,150
  • Annual Tax (8.43% rate): $2,488
  • Monthly Payment: $207

Example 2: $600,000 Home with Homestead Credit

  • Assessed Value: $600,000
  • Homestead Credit Applied: -$4,850 (estimated)
  • Net Taxable Value: $595,150
  • Annual Tax (8.43% rate): $5,017
  • Monthly Payment: $418

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

  • Assessed Value: $1,000,000
  • Homestead Credit Applied: -$4,850 (estimated)
  • Net Taxable Value: $995,150
  • Annual Tax (8.43% rate): $8,386
  • Monthly Payment: $699

Important: Homestead Credit and other tax credits require annual application by July 1st and are not automatically applied. Credits shown are estimates - actual credit amounts vary based on state funding and individual circumstances. Contact the Clay County Assessor's Office to apply for available credits.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Clay County require property tax escrow accounts to ensure timely payment of property taxes. Your lender collects a monthly amount equal to approximately 1/12th of your annual property tax bill along with your mortgage payment, then pays your taxes directly to Clay County when they become due.

Clay County property taxes are paid in two installments: the first half is typically due September 30th, and the second half is due March 31st (due March 31, 2026 for the current cycle). Your lender should make these payments from your escrow account before the delinquency dates to avoid penalties. The second half becomes delinquent on April 1st if not paid by March 31st.

To verify your lender is making correct payments, you can check your tax payment status online through the Clay County Treasurer's website or contact their office at (712) 262-4335. Keep copies of your annual escrow analysis statement and compare it with the actual tax bills from Clay County to ensure your monthly escrow payment is adequate for any tax changes or assessment updates.

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 Clay County property taxes due for the current fiscal year? A: The first half is typically due September 30th, and the second half is due March 31st (March 31, 2026 for current taxes). Taxes become delinquent the day after each due date.

Q: What tax credits are available and do I need to apply? A: Major tax credits include Homestead Credit (for primary residences), Disabled Veteran Homestead Credit, and Military Service Credit. All credits require application and are NOT automatic. You must file with the Clay County Assessor's Office by July 1st annually.

Q: How does the Homestead Credit work? A: The Homestead Credit provides tax relief for your primary residence by reducing your tax bill (not your assessed value). It also includes a provision that can limit annual assessment increases. You must apply by July 1st each year - it's not automatic even if you qualified previously.

Q: How often are properties reassessed in Clay County? A: Iowa requires properties to be assessed annually, but Clay County typically conducts physical reappraisals on a rotating basis. The Assessor's Office reviews all properties yearly for market value adjustments and may conduct inspections when permits are pulled or sales occur.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with the Clay County Board of Review between April 2nd and May 1st annually. Contact the Assessor's Office at (712) 262-2488 for appeal forms and procedures.

Q: What penalties apply for late payment? A: Iowa law requires a 1.5% penalty per month on delinquent taxes, plus interest. Additional fees may apply for tax sale procedures if taxes remain unpaid for extended periods.

Q: Can I pay my property taxes online? A: Yes, Clay County typically offers online payment options through their Treasurer's website. Contact the Clay County Treasurer's Office at (712) 262-4335 for current online payment procedures and any associated fees.

Q: Why do tax rates vary within Clay County? A: Your total tax rate depends on which city, school district, and special districts serve your property. Rural properties may have different rates than city properties, and some areas have additional levies for libraries, drainage districts, or other special services.

Q: What happens if I disagree with supplemental tax bills? A: You can appeal supplemental taxes through the same process as regular assessments. Contact the Assessor's Office within 30 days of receiving the supplemental bill to discuss your options and the appeals process.

Q: Are senior citizens eligible for additional tax relief? A: Iowa offers various property tax credits and deferrals for qualifying seniors. Contact the Clay County Assessor's Office to discuss programs like the Property Tax Credit for elderly and disabled persons, which have specific income and age requirements.

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