Illinois HB 1199: PROP TX-EXTENSION LIMITATION

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104TH GENERAL ASSEMBLY 
State of Illinois 
2025 and 2026
HB1199

Introduced 1/9/2025, by Rep. Rita Mayfield 

SYNOPSIS AS INTRODUCED:

35 ILCS 200/18-105.1 new

 Amends the Property Tax Code. Provides that, notwithstanding any other provision of law, beginning in taxable year 2026, no county clerk may extend against any property an annual property tax that exceeds the amount generated by multiplying the property tax liability for the property in the immediately preceding taxable year by one plus the percentage increase, if any, in the Consumer Price Index for the 12-month period ending in September of the immediately preceding taxable year, unless the increase in the property tax liability is the result of improvements to the property or the result of the removal of one or more exemptions that were granted with respect to the property for the immediately preceding taxable year. Effective immediately.

LRB104 06174 HLH 16208 b

A BILL FOR

HB1199LRB104 06174 HLH 16208 b

1 AN ACT concerning revenue.

2 Be it enacted by the People of the State of Illinois, 

3represented in the General Assembly:

4 Section 5. The Property Tax Code is amended by adding 

5Section 18-105.1 as follows:

6 (35 ILCS 200/18-105.1 new)

7 Sec. 18-105.1. Limit on property tax extensions. 

8Notwithstanding any other provision of law, beginning in 

9taxable year 2026, no county clerk may extend against any 

10property an annual property tax that exceeds the amount 

11generated by multiplying the property tax liability for the 

12property in the immediately preceding taxable year by one plus 

13the percentage increase, if any, in the Consumer Price Index 

14for the 12-month period ending in September of the immediately 

15preceding taxable year, unless t