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Updated 2025 Tax Year

Marion County
Property Tax Guide

Everything you need to know about property taxes in Marion 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
4.2037% effective rate (varies by taxing district)
1st Due
May 10
2nd Due
Nov 10
Exemptions
5+ Available
Section 1

How Property Tax Works

Marion County, Indiana operates under a property tax system that funds essential local services including schools, public safety, infrastructure, and county operations. Property taxes are assessed annually based on the assessed value of real estate and personal property within the county. The Marion County Assessor determines property values, while the Marion County Treasurer handles tax collection and payment processing.

The effective property tax rate for Marion County is approximately 4.2037% as of 2025, which is significantly higher than Indiana's base rate of around 1%. This rate varies by specific taxing district within the county, with different areas having slightly different rates based on local school districts, library districts, and other special assessments. Property owners can expect their annual tax bill to reflect this rate applied to their property's assessed value, minus any applicable exemptions.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
Base County Rate~1.0000%Core county services and operations
School District Levy~2.5000%Local school district funding
Library District~0.3000%Public library system funding
Special Assessments~0.4037%Various municipal services and improvements
Total Effective Rate4.2037%Combined rate for Marion-Monroe District

Note: Rates may vary slightly by specific taxing district within Marion County. The certified tax rate represents an increase from the previous year's no-new-revenue rate.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Marion 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 Marion County are triggered by changes in property ownership, new construction, or significant improvements that increase a property's assessed value during the tax year. When these events occur, the county assessor calculates additional taxes based on the increased value for the portion of the year the higher assessment applies.

For example, if you complete a $50,000 home addition in July, you would owe supplemental taxes on that additional assessed value from July through December. The calculation would be: $50,000 × 4.2037% × (6 months ÷ 12 months) = approximately $1,051 in supplemental taxes. These supplemental bills are typically issued separately from your regular annual property tax bill and have their own payment due dates.

Example Calculation

Example 1: $300,000 Property

  • Assessed Value: $300,000
  • Less Standard Deduction: $45,000 (if applicable)
  • Net Taxable Value: $255,000
  • Annual Tax: $255,000 × 4.2037% = $10,719
  • Monthly Escrow: $893

Example 2: $600,000 Property

  • Assessed Value: $600,000
  • Less Standard Deduction: $45,000 (if applicable)
  • Net Taxable Value: $555,000
  • Annual Tax: $555,000 × 4.2037% = $23,331
  • Monthly Escrow: $1,944

Example 3: $1,000,000 Property

  • Assessed Value: $1,000,000
  • Less Standard Deduction: $45,000 (if applicable)
  • Net Taxable Value: $955,000
  • Annual Tax: $955,000 × 4.2037% = $40,145
  • Monthly Escrow: $3,345

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Marion County require borrowers to maintain an escrow account for property tax payments. Your lender collects monthly escrow payments as part of your mortgage payment and pays your property taxes directly to Marion County when they become due. Lenders typically collect 1/12th of your annual tax bill each month, plus a small cushion to account for potential increases.

Property taxes are due by November 10th each year, and your lender will receive the tax bill and make payment on your behalf if you have an escrow account. You can verify that your taxes have been paid by checking the Marion County Treasurer's website at https://www.indy.gov/agency/marion-county-treasurer. If you pay your own taxes (no escrow), you're responsible for making timely payments to avoid penalties and interest charges.

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 Marion County? A: Property taxes are due by November 10th each year. Late payments are subject to penalties and interest charges.

Q: How can I pay my property taxes online? A: Visit https://www.indy.gov/agency/marion-county-treasurer to pay online or by phone. A convenience fee applies for online and phone payments.

Q: What exemptions are available for homeowners? A: Marion County offers homestead exemptions, including up to $250,000 assessed value exemption for qualified surviving spouses, disabled veteran exemptions, and senior/disabled citizen exemptions up to $29,000 for 2025.

Q: How do I appeal my property assessment? A: Contact the Marion County Assessor at https://www.indy.gov/agency/marion-county-assessor to begin the appeals process. You typically have until the first Monday in June to file an appeal.

Q: What happens if I pay my taxes late? A: Late payments incur penalties and interest charges. Continued non-payment can eventually lead to tax lien proceedings.

Q: How often are properties reassessed? A: Indiana law requires annual assessments, but major reassessments typically occur every few years with annual adjustments for market changes.

Q: Can I get a payment plan for my property taxes? A: Contact the Marion County Treasurer's office to inquire about payment arrangements for delinquent taxes.

Q: How do I find my property's assessed value? A: Use the property lookup tool at https://maps.indy.gov/AssessorPropertyCards/ to find your property's current assessed value and tax history.

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
NOTICE OF PUBLIC HEARING ON TAX INCREASEco.marion.tx.us
02
County
2025-26 Summary of Tax Roll (1-Cover Page) - Marion Countyco.marion.or.us
03
Tax Doc
2025 Certified Tax Rates by Districtin.gov
04
County
Important Tax Information - Marion Countyco.marion.or.us
05
Tax Doc
DLGF: Property Tax Due Datesin.gov
06
Tax Doc
Property Tax Paymentsmarincounty.gov
07
County
Exemptions - Marion Countyco.marion.or.us
08
County
Homestead Exemption - Marion County, OHco.marion.oh.us
09
County
Property Tax FAQ - Marion County, OHco.marion.oh.us
10
SUPPLEMENTAL NOTE ON HOUSE BILL NO. 2380kslegislature.gov
All sources verified as of 2025 Tax Year

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