When Are Illinois Property Taxes Due? Due Dates, Rates & Exemptions (2026)

Illinois homeowners face a semi-annual property tax payment schedule with deadlines of June 1 and September 1. Understanding these exact dates—plus your state's 2.08% effective tax rate and available exemptions—helps you avoid late penalties and plan your household budget effectively.

When Are Illinois Property Taxes Due?

Illinois property taxes are due twice per year: June 1 and September 1. These semi-annual payments are staggered to spread the financial burden across the year, rather than requiring one large lump sum.

Payment deadlines can vary slightly by county, so confirm the exact dates with your county treasurer's office. If June 1 or September 1 falls on a weekend or holiday, your county may extend the deadline by one business day.

Schedule	Due Date	Notes
First installment	June 1	Spring payment; confirm with county treasurer
Second installment	September 1	Fall payment; confirm with county treasurer

Missing either deadline can result in penalties and potential tax liens, so mark both dates on your calendar and set payment reminders at least two weeks in advance.

Illinois Property Tax Rates

The state's effective property tax rate is 2.08%, which represents an average across all Illinois counties. However, rates vary significantly by county and municipality, ranging from approximately 0.5% to over 2.5% depending on local property values and funding needs.

Your actual property tax bill depends on your home's assessed value and your county's applicable millage rate. A home valued at $280,000 (Illinois median home price) in a county with the state average rate would owe roughly $5,824 annually, or about $2,912 per semi-annual installment.

Individual counties maintain their own assessment processes and exemption structures. Some counties offer lower rates in certain school districts or for specific property types, so reviewing your county assessor's website can reveal opportunities to reduce your tax obligation.

Illinois Property Tax Exemptions

Illinois offers a general homestead exemption that reduces assessed property value, with the amount varying by county. This exemption is available to owner-occupants and can significantly lower your annual tax burden.

Common exemptions include:

• Homestead exemption: Reduces assessed value for primary residences; amounts vary by county
• Senior citizen exemption: Additional relief for homeowners age 65 and older
• Disabled person exemption: Available to disabled homeowners and veterans
• Agricultural exemption: For properties used primarily for farming

To qualify for any exemption, you must apply through your county assessor's office. Most applications are due by a specific deadline (typically in early spring), so contact your assessor early in the calendar year to confirm requirements and submit paperwork.

How to Pay Illinois Property Taxes

You can pay your Illinois property taxes directly to your county treasurer's office, either online, by mail, or in person. Most counties now offer online payment systems that accept credit cards, debit cards, or electronic bank transfers.

If your mortgage includes property taxes in an escrow account (part of your PITI—Principal, Interest, Taxes, Insurance), your lender automatically pays the bills on your behalf. You can verify your escrow account details by reviewing your monthly mortgage statement or contacting your loan servicer.

To estimate your total property tax obligation and plan your budget, use our free Illinois mortgage calculator to see how property taxes fit into your overall monthly housing payment.

Contact your county treasurer's office for:

• Payment portal links and instructions
• Account balance inquiries
• Penalty and interest calculations
• Payment plan options (if available)

What Happens If You Miss the Deadline?

Failing to pay property taxes by the June 1 or September 1 deadline triggers penalties of typically 1%–2% per month, plus interest charges that accrue daily. After several months of non-payment, your county may file a tax lien against your property.

A tax lien gives the county a legal claim to your home. If you continue to miss payments over an extended period, the county may initiate a tax sale or foreclosure process, potentially resulting in loss of your home.

If you're struggling to pay, contact your county treasurer immediately. Some counties offer payment plans or temporary deferrals for hardship situations. Addressing the issue promptly is far less expensive than dealing with liens or foreclosure.

Property Taxes and Your Mortgage Payment

When you take out a mortgage, your lender typically requires you to escrow property taxes—meaning you pay a portion toward taxes each month as part of your total PITI payment. This protects the lender's investment by ensuring taxes are paid on time.

Your monthly escrow payment is calculated by your lender based on your property's estimated tax liability. If your tax bill increases after reassessment, your lender may adjust your monthly payment upward to maintain a sufficient escrow reserve.

Use our Illinois mortgage calculator to estimate your full monthly payment, including the property tax and escrow components. This helps you understand the true cost of homeownership before committing to a purchase.

To learn more about how property taxes factor into your overall financial plan, visit our guide on how property taxes work across the nation. You can also review state-specific property tax exemptions that may apply to your situation.

Frequently Asked Questions

What is the Illinois property tax rate?
Illinois' effective property tax rate is 2.08% statewide, but rates vary by county from approximately 0.5% to over 2.5%. Your exact rate depends on your county and local school district. Contact your county assessor to find your specific millage rate and understand how it affects your bill.

Can I appeal my Illinois property tax assessment?
Yes. If you believe your home's assessed value is too high, you can file an appeal with your county assessor's office. Most counties have annual appeal periods (often in spring). You'll need documentation of recent home sales, repairs, or market conditions to support your case.

Do I qualify for the Illinois homestead exemption?
Illinois offers a homestead exemption for owner-occupants, with the amount varying by county. You must apply through your county assessor's office, typically by a spring deadline. Senior citizens, disabled persons, and veterans may qualify for additional exemptions with proof of eligibility.

What happens if my property taxes are escrowed in my mortgage?
Your lender collects estimated property tax payments each month and holds them in an escrow account. When your June 1 and September 1 bills come due, your lender pays them directly from escrow. Your servicer will send you an annual escrow statement showing all deposits and payments made on your behalf.