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Updated 2025 Tax Year

Knox County
Property Tax Guide

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

10 Official Sources
8 min read
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Quick Facts
Tax Rate
1.05% effective rate (varies by taxing district and location within county)
1st Due
May 10
2nd Due
Nov 10
Exemptions
5+ Available
Section 1

How Property Tax Works

Knox County, Indiana operates under the state's property tax system to fund essential local services including schools, public safety, infrastructure, and county operations. Property taxes are calculated based on assessed value multiplied by the applicable tax rate, which varies by location within the county due to different combinations of taxing districts including the county, townships, school corporations, libraries, and special districts.

The effective tax rate in Knox County is approximately 1.05% based on recent data, though this varies significantly depending on your specific location and the taxing districts that serve your property. Properties within city limits like Vincennes may have different rates than rural areas due to additional municipal services and Tax Increment Financing (TIF) districts. Indiana assesses property at 100% of true tax value (market value), and property owners may be eligible for various tax credits that require application to reduce their final tax bill.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
General Property Tax0.0053040%Base county rate for FY 2025-2026
School CorporationVariesLocal school district levies (varies by district)
TownshipVariesTownship services and fire protection
LibraryVariesPublic library services
Municipal (if applicable)VariesCity services for incorporated areas
TIF DistrictsVariesTax Increment Financing for development areas

Note: The combined effective rate averages approximately 1.05% countywide for FY 2025-2026, but actual rates vary significantly by location within Knox County. Properties in Vincennes City TIF districts may see different calculations, with some TIF areas capturing 99.77% of assessed value increases for economic development purposes.

Section 3

When Are Property Taxes Due?

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

First Installment
May 10
Delinquent after Dec 10
Second Installment
Nov 10
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 Knox County are additional tax bills issued when property changes ownership, undergoes new construction, or receives significant improvements after the January 1st assessment date. These taxes cover the difference between what was originally assessed and billed versus the new assessed value, prorated for the remainder of the tax year.

For example, if you purchase a home in June that was previously assessed at $200,000 but now reflects a market value of $300,000, you may receive a supplemental tax bill for the additional $100,000 in assessed value, calculated at your applicable tax rate and prorated for July through December. New construction completed after January 1st triggers supplemental taxes once the county assessor determines the added value of improvements.

Example Calculation

Example 1: $300,000 Property

  • Assessed Value: $300,000
  • Less: Homestead Credit (estimated): $45,000 assessment reduction
  • Net Taxable Value: $255,000
  • Annual Tax (at 1.05%): $2,678
  • Monthly Escrow: $223

Example 2: $600,000 Property

  • Assessed Value: $600,000
  • Less: Homestead Credit (estimated): $45,000 assessment reduction
  • Net Taxable Value: $555,000
  • Annual Tax (at 1.05%): $5,828
  • Monthly Escrow: $486

Example 3: $1,000,000 Property

  • Assessed Value: $1,000,000
  • Less: Homestead Credit (estimated): $45,000 assessment reduction
  • Net Taxable Value: $955,000
  • Annual Tax (at 1.05%): $10,028
  • Monthly Escrow: $836

Note: All credits require application and approval. Homestead credit limits assessment increases and reduces taxable assessed value for qualifying primary residences.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Knox County require borrowers to maintain an escrow account for property tax payments, collecting monthly installments as part of your mortgage payment. Your lender will pay your property taxes directly to the Knox County Treasurer on the May 10 and November 10 due dates. Lenders typically collect 1/12th of your estimated annual tax bill each month, plus an additional cushion as required by federal law.

You'll receive an annual escrow analysis from your lender showing tax payments made on your behalf and any adjustments needed for the following year. If your assessment or tax rate changes significantly, your monthly escrow payment may increase or decrease accordingly. Property owners can verify that taxes were paid correctly by checking with the Knox County Treasurer's office or accessing online tax records to ensure payments were properly credited to their account.

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 Knox County for FY 2025-2026? A: Property taxes are due May 10, 2026 and November 10, 2026. Payments are made to the Knox County Treasurer.

Q: What tax credits are available and do I need to apply? A: Knox County offers several tax credits including Homestead Credit for primary residences, Senior Citizens Homestead Credit (age 65+), and Low Income Senior Citizens Assessment Freeze. All credits require application and are not automatic.

Q: How does the Homestead Credit work? A: The Homestead Credit limits annual assessment increases and provides tax relief for primary residences. You must own and occupy the home and file an application with the county assessor. This credit reduces your taxable assessed value, not market value.

Q: When are properties reassessed? A: Indiana requires annual reassessments, with the assessment date being January 1st of each year. Property values are updated based on market conditions and property improvements.

Q: How do I appeal my property assessment? A: File an appeal with the Knox County Property Tax Assessment Board of Appeals. Deadlines and forms are available through the county assessor's office.

Q: What are the penalties for late payment? A: Indiana law provides for penalties and interest on delinquent property taxes. Contact the Knox County Treasurer for specific penalty rates and payment arrangements.

Q: Can I pay my property taxes online? A: Check with the Knox County Treasurer's office for available online payment options and accepted payment methods.

Q: How do special taxing districts affect my tax bill? A: Your location determines which taxing districts apply (township, school district, library, municipality). Properties in TIF districts or special assessment areas may have additional charges or different calculation methods.

Q: What is the deadline to apply for tax credits? A: Most tax credit applications must be filed by specific deadlines with the Knox County Assessor. Contact the assessor's office for current application deadlines and required documentation.

Q: Do senior citizens get automatic tax breaks? A: No, senior citizen tax credits require application even if you previously qualified. You must file annually or as required by the county assessor to maintain eligibility.

Verified Sources

Backed by 10 Official Government Sources

Every fact in this guide is sourced from official county, state, and federal documents.

01
Tax Doc
Itemized Property Tax Information - Auditorauditor.knoxcounty42.us
02
County
2025 Knox County Budget Orderin.gov
03
Tax Doc
Itemized Property Tax Information - Auditorauditor.knoxcounty42.us
04
Tax Doc
DLGF: Property Tax Due Datesin.gov
05
County
Welcome to Knox County, Indiana | Knox County ...knoxcounty.in.gov
06
State
Real Estate Taxesknoxcountyil.gov
07
County
Knox County Property Taxnacdashboard.nara.gov
08
Exemptions & Applicationsknoxcountyil.gov
09
DLGF: Exemptionsin.gov
10
County
Knox County: Property Tax Calculation - Auditorauditor.knoxcounty42.us
All sources verified as of 2025 Tax Year

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