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Updated 2025 Tax Year

DuPage County
Property Tax Guide

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

7 Official Sources
8 min read
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Quick Facts
Tax Rate
2.27% base rate (varies by location and taxing districts)
1st Due
Jun 1
2nd Due
Sep 1
Exemptions
4+ Available
Section 1

How Property Tax Works

DuPage County operates under Illinois's property tax system, where taxes are collected in arrears, meaning 2024 taxes are billed and collected in 2025. The county issues over 321,000 property tax bills annually to fund essential services including schools, municipalities, townships, parks, libraries, and county operations. Property taxes serve as the primary funding mechanism for local government services and school districts throughout DuPage County's 39 municipalities.

The effective property tax rate in DuPage County typically ranges around Illinois's base rate of approximately 2.27%, though actual rates vary by specific location within the county due to different combinations of taxing districts. Property owners benefit from Illinois's homeowner exemption, which can reduce the Equalized Assessed Value (EAV) by up to $10,000. The county operates under the Property Tax Extension Limitation Law (PTELL), which provides some limitations on tax levy increases.

Section 2

What Makes Up Your Tax Bill

ComponentTypical Rate RangeDescription
School Districts60-70% of totalElementary, high school, and community college districts
Municipalities8-15% of totalCity/village services, police, fire, infrastructure
County5-10% of totalCounty government operations and services
Township2-5% of totalTownship road maintenance and general assistance
Park Districts3-8% of totalParks, recreation facilities, and programs
Library Districts2-5% of totalPublic library operations and services
Special Districts1-5% of totalFire protection, sanitary, mosquito abatement
Forest Preserve1-3% of totalConservation and forest preserve maintenance

Note: Actual rates vary by property location and specific taxing district combinations

Section 3

When Are Property Taxes Due?

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

First Installment
Jun 1
Delinquent after Dec 10
Second Installment
Sep 1
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 DuPage County are triggered by significant changes to property ownership, value, or use during the tax year. Common triggers include new construction completion, major improvements, property splits or combinations, and changes from exempt to taxable status. These supplemental assessments ensure that property taxes reflect current property conditions rather than waiting for the next regular assessment cycle.

Supplemental taxes are calculated based on the difference between the original assessment and the new assessment, prorated for the portion of the tax year the change was in effect. For example, if a $100,000 home addition is completed in July (halfway through the tax year), the supplemental tax would be calculated on the increased assessed value for six months. Property owners receive separate supplemental tax bills with their own payment deadlines, typically 30 days from the bill date.

Example Calculation

$300,000 Home:

  • Market Value: $300,000
  • Assessed Value (33.33%): $100,000
  • Less Homeowner Exemption: -$10,000
  • Net Taxable EAV: $90,000
  • Annual Tax (2.27% rate): $2,043
  • Monthly Escrow: $170

$600,000 Home:

  • Market Value: $600,000
  • Assessed Value (33.33%): $200,000
  • Less Homeowner Exemption: -$10,000
  • Net Taxable EAV: $190,000
  • Annual Tax (2.27% rate): $4,313
  • Monthly Escrow: $359

$1,000,000 Home:

  • Market Value: $1,000,000
  • Assessed Value (33.33%): $333,333
  • Less Homeowner Exemption: -$10,000
  • Net Taxable EAV: $323,333
  • Annual Tax (2.27% rate): $7,340
  • Monthly Escrow: $612

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Section 5

Escrow & Property Taxes

Most mortgage lenders in DuPage County require property tax escrow accounts, collecting monthly payments equal to 1/12th of the annual property tax bill plus insurance premiums. Lenders typically collect an additional 2-month cushion to ensure sufficient funds for payment. DuPage County property taxes are due in two installments: June 2, 2025, and September 2, 2025, for the 2024 tax year, with lenders making these payments directly from escrow accounts.

Property owners should verify that their lender pays taxes on time and in full, as owners remain ultimately responsible for tax payments even when escrowed. The county provides online verification tools and sends confirmation notices when payments are received. Property owners can monitor their tax status and payment history through the DuPage County Treasurer's website at https://www.dupagecounty.gov/Treasurer/. Annual escrow analysis statements from lenders show how tax payments affected the escrow balance and any required payment adjustments.

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 DuPage County? A: Property taxes are due in two installments: June 2nd and September 2nd of the year following the tax year.

Q: How do I apply for the homeowner exemption? A: Contact the DuPage County Supervisor of Assessments office or visit https://www.dupagecounty.gov/PropertyInfo/ to apply for the exemption that reduces EAV by up to $10,000.

Q: Can I pay my property taxes online? A: Yes, online payments are available through the DuPage County Treasurer's website at https://www.dupagecounty.gov/Treasurer/.

Q: What happens if I pay my property taxes late? A: Late payments incur interest charges and penalties. Extended delinquency can result in tax sale proceedings.

Q: How often are properties reassessed in DuPage County? A: Properties are reassessed every four years, with annual adjustments for market changes and new construction.

Q: How do I appeal my property assessment? A: File an appeal with the DuPage County Board of Review during the designated appeal period, typically lasting several months after assessment notices.

Q: Why did my property taxes increase if my assessment stayed the same? A: Tax increases can result from higher tax rates set by local taxing districts, even with unchanged assessments.

Q: Can I receive my tax bill electronically? A: Yes, contact the Treasurer's office to sign up for electronic tax bills. Over 1,300 property owners currently receive electronic bills.

Q: What exemptions are available besides the homeowner exemption? A: Additional exemptions may include senior citizen, disabled veteran, and disabled person exemptions. Visit https://www.dupagecounty.gov/PropertyInfo/ for complete details.

Q: How are supplemental taxes calculated for new construction? A: Supplemental taxes are prorated based on when construction was completed and the property became taxable during the tax year.

Verified Sources

Backed by 7 Official Government Sources

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

01
County
DuPage County Assessordupagecounty.gov
02
County
DuPage County, IL Property Tax Informationpropertylookup.dupagecounty.gov
03
County
DuPage County Board Approves Fiscal Year 2025 Budgetdupagecounty.gov
04
County
DuPage County Board Approves Fiscal Year 2026 Budgetdupagecounty.gov
05
PT 04-06 - Government Ownership/Usetax.illinois.gov
06
County
DuPage County Treasurer | DuPage Co, ILdupagecounty.gov
07
Tax Doc
PTAX-343 Application for the Homestead Exemptiondupagecounty.gov
All sources verified as of 2025 Tax Year

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