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Updated 2025 Tax Year

Marshall County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
$24.44-$28.50 per $1,000 taxable value, varies by school district (BCLUW lowest, Marshalltown highest)
Exemptions
4+ Available
Section 1

How Property Tax Works

Marshall County, Iowa operates on a property tax system that funds essential local services including county government operations, schools, emergency services, and infrastructure maintenance. Property taxes are the primary revenue source for these services, with taxes calculated based on assessed property values and applied tax rates that vary by location within the county.

The effective property tax rate in Marshall County varies significantly depending on your specific location due to different school districts and special taxing districts. For the 2025 tax year, total rates range from approximately $24.44 per $1,000 of taxable value in areas served by BCLUW schools to $28.50 per $1,000 in areas served by Marshalltown schools. These rates reflect the combination of county, school district, agricultural extension, and other local levies that fund different services throughout Marshall County.

Section 2

What Makes Up Your Tax Bill

Marshall County Property Tax Rates (2025 Tax Year)

ComponentRate Range (per $1,000)Description
County General$9.358County government operations, roads, public safety
School District$11.898 - $15.959Varies by district (BCLUW vs. Marshalltown)
Agricultural Extension$0.591Iowa State University Extension services
Other Local$0.745Various local government services
Special Districts$1.696Emergency services, rural fire protection
Additional Levies$0.152Debt service and special assessments
Total Range$24.44 - $28.50Combined rate varies by location

Note: Rates shown are for Fiscal Year 2025 and vary by specific taxing districts within Marshall County. Areas served by different school districts (BCLUW, Marshalltown, etc.) will have different total rates. Contact the Marshall County Assessor for your specific district rates.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Marshall 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 Marshall County are additional property tax bills issued when there are changes in property ownership, new construction completion, or significant improvements that increase assessed value during the tax year. These taxes cover the difference between what was originally billed and what should be owed based on the property's updated assessment.

Common triggers for supplemental taxes include: completion of new home construction, major renovations that add square footage or significantly improve property value, subdivision of land, or correction of assessment errors. The supplemental tax is calculated by applying the current tax rate to the difference between the new and original assessed values, prorated for the portion of the tax year the change was in effect.

For example, if a $100,000 home addition is completed in January and your area's tax rate is $26 per $1,000, the supplemental tax would be approximately $2,600 ($100,000 × 0.026) for the full tax year. Property owners typically receive supplemental tax bills 30-60 days after the assessment change is processed by the Marshall County Assessor's office.

Example Calculation

Property Tax Calculations for Marshall County (2025 Tax Year)

Example 1: $300,000 Home (BCLUW School District)

  • Market Value: $300,000
  • Less: Homestead Credit: -$6,500 (requires application)
  • Net Taxable Value: $293,500
  • Tax Rate: $24.439 per $1,000
  • Annual Tax: $7,174
  • Monthly Escrow: $598

Example 2: $600,000 Home (Marshalltown School District)

  • Market Value: $600,000
  • Less: Homestead Credit: -$6,500 (requires application)
  • Less: Military Credit: -$4,000 (if eligible, requires application)
  • Net Taxable Value: $589,500
  • Tax Rate: $28.501 per $1,000
  • Annual Tax: $16,804
  • Monthly Escrow: $1,400

Example 3: $1,000,000 Home (Marshalltown School District)

  • Market Value: $1,000,000
  • Less: Homestead Credit: -$6,500 (requires application)
  • Net Taxable Value: $993,500
  • Tax Rate: $28.501 per $1,000
  • Annual Tax: $28,327
  • Monthly Escrow: $2,361

Note: All credits shown require separate applications and are not automatically applied. Contact Marshall County Assessor for application deadlines and forms.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Marshall 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 escrow payments along with your mortgage payment and pays your property taxes directly to Marshall County when they become due in September and March.

Lenders typically collect escrow payments based on the previous year's tax bill plus a small cushion to account for potential increases. Each year, your lender will conduct an escrow analysis to determine if your monthly payments need adjustment based on actual tax bills received. If taxes increase significantly due to reassessment or rate changes, you may face higher monthly payments or a one-time shortage payment.

To verify your property taxes are being paid correctly, you can check payment status online through the Marshall County Treasurer's website or contact the Treasurer's office directly. Keep copies of your tax bills and escrow statements, and review your lender's annual escrow analysis to ensure accuracy and catch any potential issues early.

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 Marshall County? A: Property taxes are due twice yearly - September 30th for the first half and March 31st for the second half of the fiscal year. Late payments incur interest and penalties, and unpaid taxes by April 1st may result in tax sale proceedings.

Q: What is the Homestead Credit and how do I apply? A: The Homestead Credit reduces your taxable assessed value by $6,500 (as of 2024) and caps assessment increases. You must occupy the property as your primary residence and file an application with the Marshall County Assessor's office. This is NOT automatic and requires annual verification.

Q: Are there other tax credits available? A: Yes, including Military Service Credit ($4,000 for qualified veterans), Elderly/Disabled Credit, and Agricultural Land Credit. All require separate applications with specific deadlines. Contact the Marshall County Assessor at (641) 754-6373 for applications and eligibility requirements.

Q: How often are properties reassessed? A: Iowa law requires properties to be assessed annually as of January 1st, with assessment notices mailed by April 1st. Marshall County uses mass appraisal techniques and may physically inspect properties on rotating cycles or when improvements are made.

Q: How do I appeal my property assessment? A: You can request an informal review with the assessor between April 2-25, or file a formal protest with the Board of Review between April 2-30. If still unsatisfied, you may appeal to the Iowa Property Assessment Appeal Board.

Q: What are the penalties for late payment? A: Late payments incur interest starting the day after the due date, plus additional penalties. Properties with unpaid taxes by April 1st may be included in the annual tax sale, which can result in loss of property ownership rights.

Q: Can I pay property taxes online? A: Yes, Marshall County offers online payment options through their official website. Contact the Marshall County Treasurer at (641) 754-1543 for current online payment procedures and accepted payment methods.

Q: Why do tax rates vary within Marshall County? A: Different areas are served by different school districts (BCLUW, Marshalltown, etc.) and special taxing districts for services like rural fire protection, library districts, and drainage districts. Your specific combination of districts determines your total tax rate.

Q: What triggers a supplemental tax bill? A: New construction completion, major improvements, property splits, ownership changes, or assessment corrections can trigger supplemental taxes. These cover the tax difference for the portion of the year after the change occurred.

Q: How do agricultural property taxes work? A: Agricultural land receives special assessment treatment based on productivity value rather than market value, resulting in significantly lower taxes. Properties must meet specific criteria and applications are required to maintain agricultural classification.

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