Property taxes in Madison County, IL fund your schools, fire protection, roads, and other local services, and your bill is the product of your equalized assessed value (minus any exemptions) times the combined rate of every taxing district your property sits in. For the 2026 cycle, bills mail the week of June 9, 2026, with four installments due July 9, September 9, October 9, and December 9. What you actually pay depends on how your township is assessed, which exemptions you claim, and whether you catch an over-assessment in time to appeal.
How Your Bill Is Calculated
The County Assessor sets a fair market value for your property, then assesses it at one-third of that value. That one-third ratio is required by Illinois law and applies statewide.
After the local assessment, the Illinois Department of Revenue applies an equalization factor — sometimes called the state multiplier — to bring your township’s median assessment level to the statutory one-third mark. If properties in your township are being assessed below that target, the multiplier pushes values up; if above, it pushes them down. The result is your equalized assessed value, or EAV.
Any exemptions you qualify for are subtracted from the EAV, and what’s left is multiplied by your local composite tax rate. That composite rate is the sum of levies from every taxing district your property sits in, which is why two homes with identical values in different parts of the county can have noticeably different bills.
Exemptions That Lower Your Bill
You apply for exemptions through the Chief County Assessment Officer. Most require an initial application, and some need periodic renewal.
General Homestead Exemption
If you own and occupy your home as your primary residence, this exemption reduces your EAV by up to $6,000. The reduction equals the increase in your current EAV above the 1977 base-year EAV, capped at $6,000. Nearly every owner-occupied home in Madison County hits the cap because values have risen substantially since 1977.1Illinois General Assembly. Illinois Code 35 ILCS 200/15-175 – General Homestead Exemption
Senior Citizens Homestead Exemption
Homeowners aged 65 or older get an additional $5,000 EAV reduction on their primary residence. You must own or have a legal interest in the property and be liable for the taxes. It stacks with the General Homestead Exemption, so a qualifying senior can see up to $11,000 removed from EAV before the tax rate is applied.2Illinois General Assembly. Illinois Code 35 ILCS 200/15-170 – Senior Citizens Homestead Exemption
Senior Citizens Assessment Freeze
This one freezes your EAV at its level from the year you first qualify. You must be 65 or older, own and live in the property, and have a total household income of $75,000 or less based on the prior calendar year. The income cap was raised to $75,000 for the 2026 tax year. The freeze does not lock in your tax rate, so your bill can still change if local levies increase, but it stops the assessed-value side of the equation from climbing.3Illinois Department of Revenue. Property Tax Relief – Homestead Exemptions, PTELL, and Senior Citizens Real Estate Tax Deferral Program
Persons with Disabilities Homestead Exemption
If you have a disability and occupy the property as your primary residence, you qualify for a $2,000 annual EAV reduction. You must be the owner of record or hold a legal interest and be responsible for the taxes.4Illinois General Assembly. Illinois Code 35 ILCS 200/15-168 – Homestead Exemption for Persons with Disabilities
Disabled Veterans Homestead Exemption
Veterans with a service-connected disability certified by the U.S. Department of Veterans Affairs receive a scaled exemption:5Illinois General Assembly. Illinois Code 35 ILCS 200/15-169 – Homestead Exemption for Veterans with Disabilities
- 30% to less than 50% disability: $2,500 EAV reduction.
- 50% to less than 70% disability: $5,000 EAV reduction.
- 70% or greater disability: the first $250,000 of EAV is exempt from taxation. For most homes in the county, that effectively eliminates the property tax bill, though owners of higher-value properties may still owe taxes on EAV above $250,000.
When and How to Pay
Madison County uses a four-installment schedule. For the 2026 tax year (covering 2025 assessments), bills mail the week of June 9, 2026, with these due dates:6Madison County ILLINOIS. Treasurer
- First installment: July 9, 2026
- Second installment: September 9, 2026
- Third installment: October 9, 2026
- Fourth installment: December 9, 2026
These can shift slightly from year to year depending on when bills go out, so check the dates printed on your actual bill.
Online payments open through the county’s portal on June 9, 2026. Credit and debit card payments carry a 2.5% convenience fee with a $2.50 minimum, and that fee goes to the card processor, not the county. Electronic check payments are also available online. You can mail a check using the return envelope included with your bill or pay in person at participating local banks during regular business hours.7Madison County ILLINOIS. Frequently Asked Questions
Keep your confirmation number or stamped receipt whichever way you pay. The online portal lets you verify a payment has been credited to your PIN, and it’s worth checking a week or two later.
Late Payments and Tax Sales
Any installment not paid by its due date is delinquent and accrues interest at 1.5% per month. That rate applies to each partial month, so one day late triggers the penalty for the full month. On a $3,000 installment, one month late costs $45, and the interest compounds quickly across multiple missed installments.
If taxes remain unpaid after all installments have passed, Illinois law requires the county treasurer to sell the unpaid taxes at an annual tax sale. In Madison County, the sale does not transfer ownership of your home. A tax buyer pays the delinquent amount, the county distributes that money to the local taxing bodies, and you then owe the tax buyer what they paid plus statutory interest and fees.8Madison County ILLINOIS. Tax Sale
After the sale, you enter a redemption period during which you can reclaim your taxes by paying the tax buyer what is owed. For residential properties with one to six units, the minimum redemption period is two and a half years from the sale date. For commercial or vacant property, the minimum is two years. In either case, the tax buyer can extend the redemption window up to a maximum of three years. If you don’t redeem in time, the tax buyer can petition the court for a deed to your property. This is how homes are genuinely lost to unpaid property taxes.
If you’re struggling to pay, contact the Madison County Treasurer’s office before the tax sale. Partial payments applied to the oldest delinquency first can sometimes keep a parcel off the sale list, though the county isn’t obligated to hold off once the statutory deadline passes.
Appealing an Assessment You Think Is Too High
If your assessment looks too high, you can challenge it. The process has two levels, and most homeowners handle the first without hiring anyone.
Board of Review
Appeals begin at the Madison County Board of Review. Complete the appropriate complaint form from the Chief County Assessment Officer, identify the property by its PIN, and state the assessed values you believe are incorrect. The strongest evidence is comparable sales data showing that similar nearby properties sold for less than what your assessment implies. Three to five recent sales of homes with similar square footage, lot size, and condition give the Board a concrete basis for comparison.
The filing deadline is 30 days from the date the township multiplier cards are mailed. For 2026, multiplier cards were mailed on March 25, making the deadline April 24, 2026.9Madison County ILLINOIS. Township Multipliers Missing this window generally forfeits your right to challenge the assessment for that tax year, so mark the date as soon as the card arrives. The Board holds a hearing, then mails a written decision.10Madison County ILLINOIS. Board of Review Rules
Illinois Property Tax Appeal Board
If the Board of Review’s decision isn’t satisfactory, you can escalate to the Illinois Property Tax Appeal Board (PTAB). The PTAB petition must be filed within 30 days of the postmark date on the Board of Review’s written decision notice.11Property Tax Appeal Board. PTAB – Practice and Procedures PTAB reviews are more formal and take longer, but they give you an independent second look.
Looking Up Your Parcel
Every parcel in the county is identified by a Property Index Number, or PIN. Madison County PINs are 15 to 18 digits long and appear on your annual tax bill and assessment notice.12Madison County ILLINOIS. Property Tax FAQs You’ll need it for nearly every interaction with the Assessor, the Board of Review, and the Treasurer.
The county’s online property tax inquiry portal lets you search by parcel number, owner name, or property address, and shows assessed values, tax amounts, and payment history.13Madison County ILLINOIS. Madison County Property Tax Inquiry Also watch for the Notice of Assessment mailed by the township assessor — it shows current valuation, any change from the prior year, and the equalization multiplier applied, and it’s the starting point for deciding whether an appeal makes sense.