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Updated 2025 Tax Year

Alexander County
Property Tax Guide

Everything you need to know about property taxes in Alexander County, IL. 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
Varies by district - typically 2.5-4.5% effective rate depending on overlapping taxing jurisdictions
1st Due
Jun 1
2nd Due
Sep 1
Exemptions
5+ Available
Section 1

How Property Tax Works

Alexander County, Illinois operates under the state's property tax system to fund essential local services including schools, county government, townships, fire protection, and other special districts. Property taxes in Alexander County are based on the assessed value of real estate, which is determined by the County Assessor and represents approximately one-third of the property's fair market value, following Illinois assessment practices.

The effective property tax rates in Alexander County vary significantly by location within the county due to different combinations of taxing districts. Property owners may be subject to taxes from multiple overlapping jurisdictions including the county, school districts, municipalities, townships, library districts, and other special service areas. The Illinois Property Tax Extension Limitation Law (PTELL) governs how much taxing bodies can increase their levies annually. Illinois follows a two-year assessment and collection cycle, with tax bills typically issued in late spring and due in two installments.

Section 2

What Makes Up Your Tax Bill

Alexander County property tax rates vary by taxing district combination and are not yet finalized for the current levy year. The following represents typical taxing components:

ComponentEstimated Rate RangeDescription
County0.3% - 0.8%County government operations, services
School Districts3.5% - 6.5%Elementary and high school districts
Township0.1% - 0.4%Road maintenance, general assistance
Library District0.2% - 0.5%Public library services
Fire Protection0.3% - 0.7%Fire department and emergency services
Other Districts0.1% - 0.5%Cemetery, park, drainage districts
Total Effective Rate4.5% - 9.4%Combined rate varies by location

Note: These are estimated ranges. Actual rates for FY 2025-2026 will be determined by local taxing bodies and published by the County Clerk. Your specific rate depends on which taxing districts serve your property location.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Alexander 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 Alexander County are additional property tax assessments that occur outside the regular annual tax cycle. These are typically triggered by changes in property ownership, new construction, or improvements that increase a property's assessed value during the tax year. When property changes hands or significant improvements are completed, the County Assessor may issue a supplemental assessment to capture the increased value.

The supplemental tax is calculated by taking the difference between the new assessed value and the previous assessed value, then applying the current tax rate to that difference. The tax is prorated based on the number of months remaining in the tax year from the date of the change. For example, if a property sells in July and the new assessment increases the taxable value by $50,000, the supplemental tax would be calculated on that $50,000 difference for the remaining months of the tax year, typically resulting in a separate tax bill sent to the new property owner.

Example Calculation

Example 1: $300,000 Property

  • Market Value: $300,000
  • Assessed Value (33.33%): $100,000
  • Less General Homestead Exemption: -$6,000
  • Net Taxable Value: $94,000
  • Annual Tax (6.5% rate): $6,110
  • Monthly Escrow: $509

Example 2: $600,000 Property

  • Market Value: $600,000
  • Assessed Value (33.33%): $200,000
  • Less General Homestead Exemption: -$6,000
  • Less Senior Citizen Exemption: -$5,000
  • Net Taxable Value: $189,000
  • Annual Tax (6.5% rate): $12,285
  • Monthly Escrow: $1,024

Example 3: $1,000,000 Property

  • Market Value: $1,000,000
  • Assessed Value (33.33%): $333,300
  • Less General Homestead Exemption: -$6,000
  • Net Taxable Value: $327,300
  • Annual Tax (7.2% rate): $23,566
  • Monthly Escrow: $1,964

Note: Tax rates shown are estimates. Exemptions require separate applications and are not automatically applied. Actual rates vary by specific taxing district combination.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Alexander County require borrowers to establish an escrow account to ensure property taxes are paid on time. The lender collects a portion of the estimated annual property tax bill with each monthly mortgage payment, typically one-twelfth of the annual tax amount. These funds are held in a separate escrow account and the lender pays the tax bills directly to Alexander County when they become due.

Property taxes in Alexander County are generally due in two installments: the first installment due June 15th and the second installment due September 15th. Lenders typically pay these bills a few days before the due dates to ensure timely payment and avoid penalties. Property owners should receive an annual escrow statement from their lender showing the account activity, and the lender may adjust monthly escrow payments if tax amounts change significantly. Property owners remain responsible for verifying that payments are made correctly and that their escrow account maintains adequate funds, as any shortfall could result in additional monthly payment requirements or lump sum payments.

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 Alexander County property taxes due for the current fiscal year? A: Property taxes are typically due in two installments: June 15th for the first installment and September 15th for the second installment. Contact the Alexander County Treasurer for exact due dates as they may vary slightly each year.

Q: What tax credits are available and do I need to apply? A: The primary tax benefit available is the General Homestead Exemption, which reduces assessed value by up to $6,000. Senior citizens may qualify for additional exemptions. All exemptions require separate applications filed with the County Assessor and are NOT automatically applied.

Q: How does the Homestead Exemption work? A: The Homestead Exemption reduces your property's Equalized Assessed Value (EAV) by up to $6,000 under current county limits, rather than capping assessment increases. You must apply annually with the County Assessor's office and the property must be your primary residence as of January 1st.

Q: When are properties reassessed in Alexander County? A: Illinois follows a cyclical assessment system. Contact the Alexander County Assessor for the specific reassessment schedule for your township or area, as different areas may be assessed in different years of the cycle.

Q: How do I appeal my property assessment? A: Assessment appeals must first be filed with the Alexander County Board of Review, typically by late summer. If unsatisfied with that decision, you can appeal to the Illinois Property Tax Appeal Board (PTAB). Specific deadlines and forms are available from the County Assessor.

Q: What are the penalties for late payment? A: Late payments typically incur interest charges and penalties. Contact the Alexander County Treasurer for current penalty rates and payment options if you cannot pay by the due date.

Q: Can I pay my property taxes online? A: Contact the Alexander County Treasurer's office to inquire about online payment options, accepted payment methods, and any associated processing fees.

Q: Why do property tax rates vary within Alexander County? A: Your total tax rate depends on which combination of taxing districts serve your property, including school districts, fire protection districts, library districts, and other special service areas. Properties in different areas may be served by different combinations of these districts, resulting in different total tax rates.

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
PTAX-1-BR, Board of Review Basic Coursetax.illinois.gov
02
October 10, 2023alexandercounty.illinois.gov
03
Tax Doc
Property Taxes in Illinois – December 2009cgfa.ilga.gov
04
ILLINOIS ECONOMICcgfa.ilga.gov
05
July 2019illinois.gov
06
County
Conveyance History - Lake County, IL Property Tax Informationtax.lakecountyil.gov
07
HB2507enr 103RD GENERAL ASSEMBLYilga.gov
08
november-2019-990-index.csvirs.gov
09
Tax Doc
PTAX-1-A, Introduction to Residential Assessment Practicestax.illinois.gov
10
Tax Doc
PTAX-60, Illinois Property Tax Rate and Levy Manualtax.illinois.gov
All sources verified as of 2025 Tax Year

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