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Updated 2025 Tax Year

Henry County
Property Tax Guide

Everything you need to know about property taxes in Henry 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
2.0%-3.5% of market value (varies by taxing districts serving your property)
1st Due
Jun 1
2nd Due
Sep 1
Exemptions
4+ Available
Section 1

How Property Tax Works

Henry County, Illinois operates under a property tax system that funds essential local services including schools, townships, municipalities, and various special districts. The county follows Illinois state law, including the Property Tax Extension Limitation Law (PTELL), which limits tax levy increases. Property taxes are assessed annually based on market value, with an assessment level of approximately 33.33% for residential properties.

The effective tax rate in Henry County varies significantly by location within the county, typically ranging from 2.0% to 3.5% of market value, depending on which taxing districts serve your property. This variation occurs because different areas are served by different combinations of school districts, municipalities, fire districts, library districts, and other special taxing units. The Illinois state average of approximately 2.27% provides a general benchmark, but your actual rate depends on your specific property location and the local taxing bodies that provide services to your area.

Section 2

What Makes Up Your Tax Bill

Based on available data for the 2025 payable tax year, Henry County property tax rates include multiple components:

ComponentApproximate RateDescription
County General0.826%Core county services and operations
School Districts1.5-2.5%Varies by school district boundaries
Township0.1-0.3%Township services and road maintenance
Municipalities0.2-0.8%City/village services (if applicable)
Conservancy District0.039%Environmental and conservation services
Fire Protection0.1-0.5%Fire and emergency services (varies by district)
Library District0.1-0.3%Public library services (if applicable)
Other Special Districts0.05-0.2%Park districts, drainage, etc.

Total Effective Rate: 2.0-3.5% (varies by specific location and taxing districts)

These rates apply to the 2025 levy year (taxes payable in 2026). Your actual tax rate depends entirely on which combination of taxing districts serve your specific property address within Henry County.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Henry 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 Henry County are additional property tax assessments issued when there are significant changes to a property's value or ownership outside the normal assessment cycle. Common triggers include new construction, major renovations, property improvements, or corrections to previous assessments that increase the property's taxable value.

When supplemental taxes are levied, they are calculated based on the difference between the old and new assessed values, multiplied by the applicable tax rate for the remaining portion of the tax year. For example, if a $50,000 home addition is completed in January and increases your assessed value by $16,500 (at 33.33% assessment ratio), and your total tax rate is 2.5%, the supplemental tax would be approximately $412.50 for the full year ($16,500 × 0.025). The supplemental bill covers the period from when the improvement was completed through the end of the current tax year.

Example Calculation

Here are three examples showing how property taxes are calculated in Henry County for the 2025 tax year, assuming a mid-range effective rate of 2.75% and typical homeowner tax credit applications:

Example 1: $300,000 Home

  • Market Value: $300,000
  • Assessed Value (33.33%): $100,000
  • Homeowner Tax Credit Applied: -$275 (requires application)
  • Net Annual Tax: $8,250 - $275 = $7,975
  • Monthly Escrow: $664

Example 2: $600,000 Home

  • Market Value: $600,000
  • Assessed Value (33.33%): $200,000
  • Homeowner Tax Credit Applied: -$275 (requires application)
  • Net Annual Tax: $16,500 - $275 = $16,225
  • Monthly Escrow: $1,352

Example 3: $1,000,000 Home

  • Market Value: $1,000,000
  • Assessed Value (33.33%): $333,300
  • Homeowner Tax Credit Applied: -$275 (requires application)
  • Net Annual Tax: $27,498
  • Monthly Escrow: $2,291

Note: These examples assume successful application for available tax credits. Credits are not automatic and must be applied for annually or as required by the county.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Henry County require property tax escrow accounts to ensure timely payment of property taxes. Your lender collects 1/12th of your estimated annual property tax bill each month along with your mortgage payment. The lender then pays your property taxes directly to Henry County when the installments are due on June 1st and September 1st.

Lenders typically conduct an annual escrow analysis to ensure adequate funds are collected. If property taxes increase significantly, you may face an escrow shortage requiring either a lump sum payment or increased monthly payments. Conversely, if taxes decrease or if the account has excess funds, you may receive a refund. You have the right to request escrow account statements and can verify payments by checking with the Henry County Treasurer's office. If you pay off your mortgage or choose to waive escrow (when permitted), you become responsible for making tax payments directly to the county by the due dates to avoid penalties and interest charges.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
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Section 6

Frequently Asked Questions

Q: When are Henry County property taxes due for the 2025-2026 fiscal year? A: Property taxes are typically due in two installments: June 1st and September 1st. If tax bills are mailed late (after May 1st), the first installment is due 30 days after the bill date.

Q: What tax credits are available and do I need to apply? A: The primary tax credit is the Homeowner Tax Credit, which can reduce your tax bill by up to $275 annually. This credit requires an application and is not automatic. You must file annually or as specified by the county assessor's office.

Q: How does the Homestead Credit work in Henry County? A: The Homestead Credit limits annual assessment increases on your primary residence, not the market value. It caps assessment growth and requires filing an application with the county assessor. This protects long-term homeowners from dramatic tax increases due to rising property values.

Q: How often are properties reassessed in Henry County? A: Illinois law requires counties to reassess properties at least every four years, though Henry County may conduct assessments more frequently. You'll receive notice of any assessment changes and have the right to appeal.

Q: What are the penalties for late property tax payments? A: Late payments incur interest charges and penalties. Contact the Henry County Treasurer's office for current penalty rates and specific consequences of delinquent payments.

Q: Can I pay my property taxes online? A: Check the Henry County Treasurer's website for current online payment options, accepted payment methods, and any associated processing fees.

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

Q: How do I appeal my property assessment? A: Property assessment appeals must be filed with the Henry County Board of Review within the specified deadline period, typically during the summer months. Contact the county assessor's office for current appeal procedures and deadlines.

Q: What happens if I don't receive my tax bill? A: Property owners remain responsible for paying taxes even if bills are not received. Contact the Henry County Treasurer's office to obtain copies of your tax bill and ensure your mailing address is current.

Q: Are there additional tax credits for seniors or veterans? A: Illinois offers various tax credits for seniors, veterans, and disabled persons. Contact the Henry County Assessor's office to learn about available programs and application requirements, as most require annual applications and income verification.

Verified Sources

Backed by 10 Official Government Sources

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

01
Real Property Information - Auditorauditor.henrycounty33.us
02
County
Henry County Property Taxnacdashboard.nara.gov
03
County
McHenry County Property Tax Inquirymchenrycountyil.gov
04
Tax Doc
When do I have to pay my property taxes?tax.illinois.gov
05
PT 07-21 - Charitable Ownership/Usetax.illinois.gov
06
County
ILLINOIS COUNTY CLERKS' OFFICIAL PROPERTY TAX ...clerk.kanecountyil.gov
07
County
Treasurer: Real Property Information - Henry County Government ...treasurer.henrycounty33.us
08
County
Treasurer: Real Property Information - Henry County Government ...treasurer.henrycounty33.us
09
State
GAO-09-830SP, Recovery Act: States' and Localities' ...gao.gov
10
March 2020illinois.gov
All sources verified as of 2025 Tax Year

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