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Updated 2025 Tax Year

Calhoun County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
Varies by location within county (county rate 0.28% for 2024-25, total rates vary by school district and municipality)
Exemptions
5+ Available
Section 1

How Property Tax Works

Calhoun County, Iowa operates under the state's property tax system to fund essential local services including schools, county government operations, emergency services, and infrastructure maintenance. Property taxes are assessed annually based on the assessed value of real estate and are the primary funding source for local government operations. The county follows Iowa's standard assessment practices with properties typically assessed at a percentage of their market value.

Property tax rates in Calhoun County vary by location within the county due to different combinations of taxing jurisdictions, including school districts, cities, townships, and special service districts. For the 2024-2025 fiscal year, the proposed county tax rate is 0.28%, though this represents only a portion of the total tax bill property owners will receive. The total effective tax rate typically ranges from approximately 1% to 2% of assessed value when combining all taxing jurisdictions, though this varies significantly based on your specific location and the services provided in your area.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
Calhoun County General Fund0.28% (proposed)Basic county services and operations
School DistrictVaries by districtLocal school operations and facilities
City/MunicipalVaries by cityCity services (if located within city limits)
TownshipVaries by townshipTownship road maintenance and services
Special DistrictsVariesLibrary, fire protection, drainage, or other special services

Note: These rates apply to the 2024-2025 fiscal year (taxes payable July 1, 2024 through June 30, 2025) based on 2023 assessments. The proposed county rate of 0.28% is subject to final approval by the Board of Supervisors after public hearing. Your total tax rate will depend on which combination of taxing jurisdictions serve your specific property location within Calhoun County.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Calhoun 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 Calhoun County are additional property tax assessments that occur when there are changes to property ownership, improvements, or new construction after the standard assessment date. These supplemental bills are issued to account for changes in property value or ownership that were not captured in the annual assessment cycle.

Supplemental taxes are most commonly triggered by new construction, property improvements that increase assessed value, changes in property use, or when property changes hands and reassessment reveals a significant difference in value. The supplemental tax is calculated by applying the current tax rate to the difference between the new assessed value and the previous assessed value, prorated for the portion of the tax year remaining.

For example, if you complete a home addition in September that increases your assessed value by $50,000, and your total tax rate is 1.5%, you would receive a supplemental tax bill for approximately $375 ($50,000 × 1.5% × 6/12 months remaining in the fiscal year). Supplemental taxes are due within 30 days of the bill date and are separate from your regular property tax installments.

Example Calculation

Example 1: $300,000 Property Value

  • Assessed Value: $300,000
  • Homestead Credit Applied: -$4,850 (requires application)
  • Net Taxable Value: $295,150
  • Total Tax Rate: 1.2% (varies by location)
  • Annual Tax: $3,542
  • Monthly Escrow: $295

Example 2: $600,000 Property Value

  • Assessed Value: $600,000
  • Homestead Credit Applied: -$4,850 (requires application)
  • Military Exemption: -$1,852 (if eligible, requires application)
  • Net Taxable Value: $593,298
  • Total Tax Rate: 1.4% (varies by location)
  • Annual Tax: $8,306
  • Monthly Escrow: $692

Example 3: $1,000,000 Property Value

  • Assessed Value: $1,000,000
  • Homestead Credit Applied: -$4,850 (requires application)
  • Net Taxable Value: $995,150
  • Total Tax Rate: 1.6% (varies by location)
  • Annual Tax: $15,922
  • Monthly Escrow: $1,327

Note: Tax credits shown require annual application and are not automatically applied. Actual rates vary significantly by location within the county based on your specific taxing districts.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Calhoun County require property tax escrow accounts for borrowers with less than 20% down payment, though some lenders may require escrow regardless of down payment amount. Your lender collects monthly property tax payments along with your mortgage payment and holds these funds in an escrow account to pay your property taxes when they become due.

Property taxes in Calhoun County are due in two installments: the first installment is due April 15th and the second installment is due October 15th. Your lender will typically pay these bills directly to the county treasurer from your escrow account. It's important to verify that payments are made on time, as you remain ultimately responsible for ensuring taxes are paid even when using an escrow account.

Lenders are required to provide an annual escrow analysis showing how your escrow funds were used and whether adjustments to your monthly payment are needed. If your property taxes increase due to reassessment or rate changes, your monthly escrow payment will be adjusted accordingly. You should review your tax bills when received and notify your lender immediately of any discrepancies to ensure proper payment.

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 Calhoun County for fiscal year 2024-2025? A: Property taxes are due in two installments: first installment by April 15, 2025, and second installment by October 15, 2025.

Q: What tax credits are available and do I need to apply? A: Iowa offers several tax credits including Homestead Credit, Military Exemption, and Elderly/Disabled Credit. All credits require annual application and are NOT automatic. Contact the Calhoun County Assessor at 416 Fourth St. Suite 6 for application forms and deadlines.

Q: How does the Homestead Credit work? A: The Homestead Credit primarily caps the annual increase in your home's assessed value for tax purposes and provides additional tax relief. You must file an application with the county assessor to receive this credit, and it must be renewed if you change ownership or modify your property use.

Q: How often are properties reassessed in Calhoun County? A: Properties are reassessed annually, but Iowa law requires a physical review of all properties at least once every four years. Assessment notices are typically mailed in early spring.

Q: How do I appeal my property assessment? A: Assessment protest forms are due by April 30th to the Calhoun County Assessor. Forms can be downloaded from the county website or obtained at 416 Fourth St. Suite 6. You must file your protest by the deadline to be eligible for review.

Q: What are the penalties for late property tax payments? A: Iowa law imposes penalties and interest on delinquent property taxes. Interest begins accruing immediately after the due date, and additional penalties may apply for extended delinquency.

Q: Can I pay my property taxes online? A: Yes, Calhoun County offers online property tax payment options. Contact the County Treasurer's office or visit the county website for online payment portal access and accepted payment methods.

Q: Why do tax rates vary within Calhoun County? A: Your total tax rate depends on which taxing jurisdictions serve your property, including your school district, city (if applicable), township, and any special service districts like fire protection or library districts. Properties in different areas of the county may be served by different combinations of these entities.

Q: What triggers a supplemental tax bill? A: Supplemental taxes are issued for new construction, major property improvements, changes in property use, or significant assessment corrections discovered after the annual assessment cycle.

Q: How do special district taxes work? A: Special districts provide specific services like fire protection, library services, or drainage, and may levy additional taxes on properties within their boundaries. These rates are set independently and vary by district based on the services provided and local needs.

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