Cook County 2024 Second Installment Tax Bills Released Today, November 14: Key Dates and What to Know

Introduction

The second installment of the 2024 Cook County property tax bills is now available as of today. Property owners can view their bills online and should expect mailed copies to begin arriving shortly. Payment for this installment is due Monday, December 15, 2025.

This release comes much later than the usual late summer schedule due to delays caused by the county’s property tax system upgrade.

Key Dates for Current and Upcoming Bills

• 2024 Second Installment: Released today, with a due date of December 15, 2025

• 2025 First Installment: Scheduled for no earlier than April 1, 2026, giving taxpayers more time between payment cycles than the typical March 1 due date

How to Access Your Bill

You can view, download, and pay your property tax bill through the Cook County Treasurer’s website using your address or Property Index Number (PIN). Even if the mailed bill has not yet arrived, you are still responsible for on-time payment, so checking your bill online or contacting the Treasurer’s office is advised.

What Is the Typical Issuance Date for Cook County Tax Bills?

Cook County property tax bills are mailed in two installments each year:

• First installment: Usually mailed early in the year (around March) and based on an estimated amount

• Second installment: Reflects the final assessment and tax rate, typically mailed in July or August and due in early August

However, for Tax Year 2024 (payable in 2025), the County announced a new timeline:

• Mailing Date: November 14, 2025

• Due Date: December 15, 2025

(Source: Daily Herald, Cook County Treasurer’s Office)

This delay represents a major shift from the traditional mid-summer billing cycle.

Why Are Cook County Tax Bills Delayed?

Delays in Cook County tax bills stem from several administrative and technical factors:

• The property tax process depends on finalized assessments, appeal outcomes, and tax rates across hundreds of local taxing bodies

• For 2024, the County implemented a large-scale technology upgrade that caused months-long delays in processing assessments and generating bills

• When appeals or tech migrations slow the workflow, bills cannot legally be issued until all data are certified

These delays are systemic, not random, and often tied to reassessment years or system modernization projects.

How Can I Check When My Cook County Tax Bill Will Arrive?

You can track your Cook County property tax bill through the official online portals:

• Cook County Property Tax Portal: Search by Property Index Number (PIN) or address

• Cook County Treasurer’s Website: Check due dates, view or download bills, and make payments

• Tip: Make sure your mailing address is current with the Treasurer’s Office so you receive future bills promptly

What Are the Due Dates for Cook County Property Tax Payments?

Typical due dates:

• First Installment: Around March 1 each year

• Second Installment: Traditionally due August 1, but for 2024, bills are due December 15, 2025

Late payments may accrue penalties, so it’s important to verify current dates online.

How Do Assessment Appeals Affect When the Bills Come Out?

Assessment appeals directly influence tax bill timing. The Assessor’s Office must complete all reassessments and process appeals before the County Clerk finalizes tax rates.

Large appeal volumes, especially in triennial reassessment years, delay the second installment. This domino effect can push bills from summer into late fall.

What Happens If I Don’t Get My Bill or Pay Late?

You are legally responsible for paying your property taxes even if the bill is not received in the mail.

Failure to pay by the due date results in penalties and possible tax sale proceedings.

Always confirm your account through the Treasurer’s online system and sign up for e-notifications to avoid missing payment deadlines.

Historical Trends: Cook County Property Tax Bill Schedule (Past Years)

Over the past several years, Cook County’s property tax billing schedule has shifted several times due to reassessments, appeals, and system upgrades.

Here’s a summary of how tax bill mailing and due dates have trended:

• Tax Year 2021 (Payable 2022): The first installment was due March 1, 2022, and the second installment was delayed until December 30, 2022 because of the County’s reassessment cycle

• Tax Year 2022 (Payable 2023): The schedule began returning to normal, with the first installment due March 1, 2023 and the second installment due August 1, 2023

• Tax Year 2023 (Payable 2024): The standard timeline held steady — first installment March 1, 2024, second installment August 1, 2024

• Tax Year 2024 (Payable 2025): The first installment was due March 4, 2025, but the second installment was pushed back to December 15, 2025, a major delay attributed to the County’s technology upgrade and system migration

Trend Insight

Over the past four years, the second installment has typically been due in August, but 2024 marks a significant shift toward late-year payments.

Continued modernization and reassessment work may keep the schedule variable for the near future. Property owners should budget for potential November or December due dates and monitor updates from the Cook County Treasurer’s Office and Cook County Assessor’s Office to stay informed.

Frequently Asked Questions

Why Are Cook County Tax Bills Delayed?

Bills are delayed when the Assessor, Clerk, and Treasurer must coordinate reassessments, appeals, and tax rate certifications.

The 2024 delay was primarily due to technology upgrades.

How Can I Check the Status of My Tax Bill?

Visit the Cook County Treasurer’s website and enter your PIN or address to see your current and past bills.

When Is the First Installment Due?

The first installment is generally due March 1 based on an estimate equal to 55 percent of the prior year’s bill.

What Is the 2025 Schedule for Tax Bills?

For Tax Year 2024 (payable 2025):

• Mailing: November 14, 2025

• Due: December 15, 2025

What Happens If I Miss the Payment Deadline?

Late payments accrue interest penalties. Continued nonpayment may lead to tax sale procedures under Illinois law.

Conclusion

For 2025, Cook County property owners can expect their second installment bills to be mailed November 14 and due December 15.

While delays have become more common, staying informed through the Treasurer’s and Assessor’s online portals ensures you never miss a payment.

Planning ahead and monitoring the evolving schedule will protect you from penalties and unexpected surprises.