HonestCasa logoHonestCasa
Updated 2025 Tax Year

Buchanan County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
Approximately 1% effective rate, varies by taxing jurisdiction within county
1st Due
Sep 30
2nd Due
Mar 31
Exemptions
5+ Available
Section 1

How Property Tax Works

Buchanan County, Iowa operates under Iowa's property tax system, where property taxes serve as the primary funding mechanism for essential local services including schools, county operations, cities, and various special districts. Property owners in Buchanan County can expect effective tax rates that generally align with Iowa's statewide average of approximately 1%, though actual rates vary significantly based on your specific location within the county due to overlapping taxing jurisdictions.

The county follows Iowa's assessment and taxation calendar, with assessments conducted annually and tax bills reflecting the combined levies of multiple local government entities. Your total property tax bill represents the sum of levies from Buchanan County government, your local school district, city or township, and any applicable special districts such as agricultural extension, mental health regions, or emergency services districts. Because these taxing districts have different boundaries throughout the county, two properties of identical value in different locations may have notably different tax obligations.

Section 2

What Makes Up Your Tax Bill

Based on available information for Buchanan County, the final tax rates for FY 2025-2026 have not yet been determined, as county boards typically finalize budgets and corresponding tax levies during the budget certification process.

ComponentEstimated Rate RangeDescription
County General$3.00-$5.00 per $1,000Basic county services, roads, administration
School Districts$12.00-$16.00 per $1,000Varies by district; includes general fund and debt service
City/Township$2.00-$8.00 per $1,000Municipal services (varies significantly by municipality)
Agricultural Extension~$0.75 per $1,000County extension services
Assessor Levy~$0.75 per $1,000Property assessment operations
Mental Health~$0.50 per $1,000Regional mental health services

Note: Actual rates vary by specific taxing district boundaries within Buchanan County. Final rates for tax year 2025 (payable 2026) will be certified by each taxing authority during their respective budget processes.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Buchanan 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

Iowa generally does not employ supplemental tax assessments like some other states. Instead, property assessments are conducted annually with a consistent assessment date of January 1st. However, supplemental-type situations can occur when:

New Construction or Improvements: If you complete construction or major improvements after January 1st but before the assessment rolls are finalized, the assessor may add a prorated assessment for the current tax year. For example, if you complete a $100,000 addition in June, you might be assessed for approximately half the year's taxes on that improvement value.

Omitted Property: If the assessor discovers property that was previously omitted from tax rolls, they can assess back taxes for up to five years. This might occur with unreported improvements, mobile homes, or other taxable property that wasn't properly recorded.

Example Calculation

The following examples assume combined tax rates and typical homestead tax credit applications. All tax credits require application and are not automatic.

Example 1: $300,000 Home

  • Assessed Value: $300,000
  • Less: Homestead Tax Credit (estimated): -$4,850
  • Net Taxable Value: $295,150
  • Annual Tax (at ~$32.00/$1,000): $9,445
  • Monthly Escrow: ~$787

Example 2: $600,000 Home

  • Assessed Value: $600,000
  • Less: Homestead Tax Credit (estimated): -$4,850
  • Net Taxable Value: $595,150
  • Annual Tax (at ~$32.00/$1,000): $19,045
  • Monthly Escrow: ~$1,587

Example 3: $1,000,000 Home

  • Assessed Value: $1,000,000
  • Less: Homestead Tax Credit (estimated): -$4,850
  • Net Taxable Value: $995,150
  • Annual Tax (at ~$32.00/$1,000): $31,845
  • Monthly Escrow: ~$2,654

Important: Tax credits shown require annual application. Rates vary by location within the county based on special taxing districts.

See How Taxes Affect Your Payment

Property taxes are just part of your total monthly cost. Get the full picture.

Calculate Now
Section 5

Escrow & Property Taxes

Most mortgage lenders in Buchanan County require property tax escrow accounts for loans with less than 20% down payment, though some lenders may require escrow regardless of down payment amount. Your lender will estimate your annual property tax obligation and divide it into monthly payments collected with your mortgage payment.

Property taxes in Buchanan County are payable in two installments: the first half is typically due in September, and the second half is due the following March. For 2025, the September installment was due September 30, 2025, with penalties beginning October 1, 2025, at 1.5% per month. Lenders typically pay taxes from your escrow account shortly before the due dates to ensure timely payment and avoid penalties.

Your lender will conduct an annual escrow analysis to ensure adequate funds are collected. If property taxes increase due to higher assessments or tax rate changes, your monthly escrow payment may increase. You can verify that your lender is paying the correct amount by comparing their payments to your actual tax bills from the Buchanan County Treasurer's office.

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 Buchanan County for 2025? A: The September 2025 installment was due September 30, 2025. The March 2026 installment will typically be due March 31, 2026. Late payments incur penalties of 1.5% per month.

Q: What homestead tax credits are available and do they require application? A: Iowa offers a Homestead Tax Credit that reduces your tax bill (not assessed value). This credit requires annual application with the Buchanan County Assessor's office. The credit amount varies based on state funding but typically provides several thousand dollars in tax reduction for qualifying owner-occupied homes.

Q: Does the homestead credit reduce my home's assessed value? A: No, the homestead credit is a tax credit that reduces your tax bill after assessment. It also provides rollback protection that limits assessment increases on your homestead property, but it doesn't reduce the market value assessment itself.

Q: When and how do I apply for the homestead tax credit? A: Applications must typically be filed with the Buchanan County Assessor by July 1st for the following tax year. Contact the Assessor's office for current forms and specific deadlines, as these may vary.

Q: How often are properties reassessed in Buchanan County? A: Iowa requires annual assessment of all real property as of January 1st each year. However, not all properties receive physical inspections annually unless there are changes, sales, or other triggers requiring review.

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

Q: What penalty applies to late tax payments? A: Late payments incur penalties of 1.5% per month, rounded to the nearest whole dollar, beginning the day after the due date.

Q: Can I pay my property taxes online? A: Contact the Buchanan County Treasurer's office directly for current online payment options and any associated convenience fees.

Q: What special district taxes might apply to my property? A: Depending on your location, you may pay taxes to agricultural extension services, emergency services districts, library districts, or drainage districts. Your tax statement will itemize all applicable levies.

Q: Are there tax credits available for seniors or disabled persons? A: Iowa may offer additional property tax credits for qualifying seniors, disabled persons, or veterans. These require separate applications with specific eligibility requirements. Contact the Buchanan County Assessor's office for details and application procedures.

See the Full Picture of Your Home Costs

Property taxes are just one piece of homeownership. HonestCasa helps you understand your total monthly cost and explore safe ways to access your home equity.

Total Monthly Cost

Mortgage + taxes + insurance + HOA

Equity Growth

Track how your equity grows over time

Safe Equity Access

Options for projects or debt payoff

Free • No credit check • 2-minute estimate