Illinois SB 1526: PROP TX-ENERGY STORAGE

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104TH GENERAL ASSEMBLY 
State of Illinois 
2025 and 2026
SB1526

Introduced 2/4/2025, by Sen. David Koehler 

SYNOPSIS AS INTRODUCED:

35 ILCS 200/Art. 10 Div. 22 heading new

35 ILCS 200/10-920 new

35 ILCS 200/10-925 new

35 ILCS 200/10-935 new

35 ILCS 200/10-940 new

35 ILCS 200/10-945 new

35 ILCS 200/10-950 new

35 ILCS 200/10-955 new

35 ILCS 200/10-960 new

 Amends the Property Tax Code. Provides that the fair cash value of commercial energy storage system improvements in counties with fewer than 3,000,000 inhabitants shall be determined by subtracting the allowance for physical depreciation from the commercial energy storage system trended real property cost basis. Provides that those commercial energy storage systems are not subject to equalization factors applied by the Department of Revenue or by any board of review, assessor, or chief county assessment officer. Provides that the owner of the commercial energy storage system shall commission a metes and bounds survey description of the land upon which the commercial energy storage system is located. Contains other provisions concerning the assessment of commercial energy storage systems. Effective immediately.

LRB104 05726 HLH 15756 b

A BILL FOR

SB1526LRB104 05726 HLH 15756 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 

5Division 22 to Article 10 as follows:

6 (35 ILCS 200/Art. 10 Div. 22 heading new)

7Division 22. Commercial energy storage systems

8 (35 ILCS 200/10-920 new)

9 Sec. 10-920. Definitions. As used in this Division:

10 "Allowance for physical depreciation" means the product 

11of: (1) the quotient generated by d