Wondering when your Illinois property tax due date is? Whether you’re a new homeowner or seasoned investor, it’s important to know when property tax bills arrive and how to pay them. In most Illinois counties, property taxes are paid in two installments, though dates vary by location.
In this guide, we’ll cover key Illinois tax due dates, how to make a property tax payment in Illinois, and what to expect if payments are late.
What Is Property Tax in Illinois?
Property tax in Illinois is a local tax levied on real estate to fund schools, public safety, libraries, infrastructure, and other community services.
Illinois does not have a uniform statewide property tax rate. Instead, rates vary by county, township, school district, and municipality. On average, Illinois has one of the highest property tax burdens in the nation, with an effective tax rate of about 2.1% of a home’s market value.
This means that on a $300,000 home, you might pay around $6,300 per year, though the exact amount depends on your location. For example, homeowners in Cook County may face different rates than those in DuPage, Lake, or Kane counties.
How Much Are Property Taxes in Illinois?
Your property tax bill is based on the assessed value of your home multiplied by the local tax rate. Here’s how it works:
- Assessment: Counties in Illinois generally assess property value at one-third (33.3%) of market value.
- Equalization Factor (Multiplier): To keep values consistent statewide, an equalization factor is applied by the Illinois Department of Revenue.
- Local Tax Rate: Each taxing district (schools, municipalities, etc.) sets a levy, which determines the final rate.
Once all of these pieces are combined, you get your final tax bill.
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When Are Illinois Property Taxes Due? When Are They Considered Late?
Illinois property taxes are billed in arrears, meaning taxes you pay in 2025 are based on your property’s assessed value in 2024.
- Installment 1: Usually due in June (some counties set exact dates, like June 1 or June 15).
- Installment 2: Usually due in September or October, depending on the county’s schedule.
If taxes are not paid by the due date, penalties and interest charges apply. In Illinois, late payments can accrue 1.5% interest per month on the unpaid balance. Long-term delinquency may result in your taxes being sold at a tax sale.
Do Due Dates Vary by County?
Yes, Illinois does not have uniform statewide due dates. Each county sets its own schedule.
For example:
- Cook County (Chicago): Typically bills the first installment by March 1 (due April 1) and the second installment by August (due October 1).
- DuPage and Lake Counties: Often due in June and September.
Always check your county treasurer’s office for exact dates.
When Will You Receive Your Property Tax Bill?
Most counties mail property tax bills in May. In Cook County, the first installment arrives by January 31, with the second issued around June or July.
If your bill doesn’t arrive, don’t wait. You’re still responsible for payment by the due date. You can usually pay online or look up your property address on your county’s tax portal to confirm your balance.
What Happens If You Miss the Illinois Property Tax Due Date?
Late payments are subject to interest. Most counties charge 1.5% per month on the unpaid balance, starting the day after the installment due date.
Unpaid taxes can lead to a tax sale, where the debt tied to your real estate is sold to third parties. This can complicate refinancing or selling down the road. Staying ahead of Illinois property taxes due is always your best option.
Property Tax Reassessments In Illinois
In Illinois, property tax bills can change significantly after a reassessment. Counties review property values on a set rotation – every three years in Cook County and every four years in most other counties.
A reassessment adjusts your home’s taxable value to better reflect its current market value. That means:
- If home prices in your neighborhood have risen, your assessed value – and property tax bill – may increase.
- Major renovations or additions, like finishing a basement or adding a new garage, can also trigger a reassessment outside the regular cycle.
- When you purchase a home, property taxes are typically prorated at closing based on the prior year’s assessment, but your bill may rise after the next county reassessment reflects the new market value.
Understanding when your county reassesses property helps you anticipate potential changes and plan your budget accordingly.
Frequently Asked Questions
How often are property taxes assessed in Illinois?
Most counties reassess property every four years. Cook County uses a three-year cycle. Annual bills reflect the most recent assessed value plus equalization factors.
Is there a limit on how much property taxes can increase?
Taxing districts are limited by the Property Tax Extension Limitation Law (PTELL), which generally restricts levy increases to the lesser of 5% or inflation.
What happens if I don’t pay my property taxes on time?
Unpaid property taxes accrue 1.5% interest per month. If left unpaid, your taxes may be sold at the annual tax sale, where investors can buy the lien on your property. If you don’t redeem the taxes, this could ultimately lead to foreclosure.
Are there exemptions to reduce my property tax bill?
Yes. Common exemptions include the General Homestead Exemption, Senior Citizens Exemption, and Veterans Exemption. These reduce the assessed value of your home and, in turn, your bill.
Want to Learn More?
Understanding when property taxes are due in Illinois, and how they’re calculated, can save you from costly surprises. At JVM Lending, we help Illinois homebuyers and homeowners understand the full picture of homeownership costs, from property taxes to mortgage planning.
If you’d like expert guidance on Illinois property taxes or any other part of the homebuying process, reach out to our team at JVM Lending today.
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*Please Note: The information provided in this blog post is intended for informational and educational purposes only. JVM Lending is not a tax professional or financial advisor. Property tax laws and regulations can be complex and may vary by location and individual circumstances. We strongly recommend consulting with certified tax professionals for personalized advice and guidance on property tax matters. If you’d like a referral to a tax professional or financial advisor, contact us and we’ll happily refer you to one of the trusted professionals in our network.
