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Updated 2025 Tax Year

Louisa County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
Approximately $0.72 per $100 of assessed value (varies by taxing district)
Exemptions
5+ Available
Section 1

How Property Tax Works

Louisa 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. Property taxes in Louisa County are calculated based on assessed property values and applied tax rates that vary depending on your specific location within the county due to different taxing districts such as school districts, cities, and special service areas.

For the 2025 tax year, the effective property tax rate in Louisa County is approximately $0.72 per $100 of assessed property value, though this rate can vary significantly based on which taxing districts serve your property. Iowa uses a complex assessment system with rollback percentages that can affect your final tax calculation, and property owners should be aware that most tax credits and benefits require formal application and are not automatically applied to your tax bill.

Section 2

What Makes Up Your Tax Bill

ComponentRate per $100Description
County Basic$3.39806General county operations and services
County Debt Service$0.59377County debt obligations and bonds
Emergency Services$0.13566EMS and emergency response services
Rural Basic$1.22896Rural area services (rural properties only)
School DistrictVariesLocal school district levy (varies by district)
City/MunicipalVariesCity services (incorporated areas only)
Total Composite~$7.20Approximate total rate per $100 assessed value

Rates shown are for FY 2025-2026 levy year. Actual rates vary significantly by location within Louisa County depending on which school district, city, and special taxing districts serve your property. Rural properties may have different rate structures than urban properties.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Louisa 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 Louisa County are additional property tax assessments that occur when there are changes to property ownership, new construction, or improvements that increase property value after the regular assessment period. These taxes are calculated based on the difference between the old and new assessed values, prorated for the portion of the tax year remaining after the change occurs.

For example, if you complete a $50,000 home addition in January that increases your assessed value, and your property tax rate is $7.20 per $100, you would owe an additional $36 per month ($50,000 ÷ 100 × $7.20 ÷ 12 months) for each remaining month in the tax year. Supplemental tax bills are issued separately from regular property tax bills and have their own payment deadlines, typically 30 days from the issue date.

Example Calculation

Example 1: $300,000 Home

  • Market Value: $300,000
  • Assessed Value: $300,000
  • Less: Homestead Credit (if qualified): $4,850
  • Net Taxable Value: $295,150
  • Annual Tax: $2,125 ($295,150 × 0.0072)
  • Monthly Payment: $177

Example 2: $600,000 Home

  • Market Value: $600,000
  • Assessed Value: $600,000
  • Less: Homestead Credit (if qualified): $4,850
  • Net Taxable Value: $595,150
  • Annual Tax: $4,285 ($595,150 × 0.0072)
  • Monthly Payment: $357

Example 3: $1,000,000 Home

  • Market Value: $1,000,000
  • Assessed Value: $1,000,000
  • Less: Homestead Credit (if qualified): $4,850
  • Net Taxable Value: $995,150
  • Annual Tax: $7,165 ($995,150 × 0.0072)
  • Monthly Payment: $597

Note: Homestead Credit requires annual application and caps assessment increases rather than reducing market value. Actual rates vary by taxing district location.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Louisa County require property tax escrow accounts, where you pay 1/12th of your estimated annual property tax bill with each monthly mortgage payment. Your lender collects these funds and pays your property taxes directly to the county on your behalf. Lenders typically pay the first half installment by the September 30 deadline and the second half by the March 31 deadline.

Each year, your lender will conduct an escrow analysis to ensure adequate funds are collected based on your current tax assessment. If your property taxes increase, your monthly escrow payment will adjust accordingly. You can verify that your taxes are being paid correctly by checking with the Louisa County Treasurer's office or accessing online payment records. Property owners remain ultimately responsible for ensuring taxes are paid even when using escrow services.

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 Louisa County for FY 2025-2026? A: Property taxes are due in two installments: first half by September 30, 2025, and second half by March 31, 2026.

Q: What is the Iowa Homestead Tax Credit and do I need to apply? A: The Homestead Tax Credit helps limit annual assessment increases on your primary residence. You must apply annually using Form 54-028, and the application deadline is typically July 1st. This is a tax credit that requires application - it's not automatic.

Q: Are there other tax credits available that require application? A: Yes, Iowa offers several tax credits including Military Service Tax Credit, Disability Tax Credit, and Senior/Disabled Property Tax Credit. All require separate applications with specific deadlines and eligibility requirements.

Q: How often are properties reassessed in Louisa County? A: Iowa law requires property reassessment every two years. Louisa County follows this schedule with reassessments occurring in odd-numbered years for taxes payable in the following year.

Q: What happens if I pay my property taxes late? A: Late payments incur penalties and interest. After September 30th for first half and March 31st for second half, penalties begin accruing monthly until paid in full.

Q: Can I pay my property taxes online? A: Contact the Louisa County Treasurer's office directly for current online payment options and accepted payment methods.

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

Q: Why do tax rates vary within Louisa County? A: Different areas are served by different school districts, cities, and special taxing districts (fire, library, etc.), each with their own tax levies that combine to create your total tax rate.

Q: What's the difference between a tax credit and an exemption? A: Tax credits reduce your final tax bill amount, while exemptions reduce the assessed value subject to tax. In Iowa, most benefits like Homestead are actually credits, not exemptions, and require annual application.

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