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 new35 ILCS 200/10-920 new35 ILCS 200/10-925 new35 ILCS 200/10-935 new35 ILCS 200/10-940 new35 ILCS 200/10-945 new35 ILCS 200/10-950 new35 ILCS 200/10-955 new35 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 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 new35 ILCS 200/10-920 new35 ILCS 200/10-925 new35 ILCS 200/10-935 new35 ILCS 200/10-940 new35 ILCS 200/10-945 new35 ILCS 200/10-950 new35 ILCS 200/10-955 new35 ILCS 200/10-960 new 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 LRB104 05726 HLH 15756 b A BILL FOR 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 new35 ILCS 200/10-920 new35 ILCS 200/10-925 new35 ILCS 200/10-935 new35 ILCS 200/10-940 new35 ILCS 200/10-945 new35 ILCS 200/10-950 new35 ILCS 200/10-955 new35 ILCS 200/10-960 new 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 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 LRB104 05726 HLH 15756 b LRB104 05726 HLH 15756 b A BILL FOR SB1526LRB104 05726 HLH 15756 b SB1526 LRB104 05726 HLH 15756 b SB1526 LRB104 05726 HLH 15756 b 1 AN ACT concerning revenue. 2 Be it enacted by the People of the State of Illinois, 3 represented in the General Assembly: 4 Section 5. The Property Tax Code is amended by adding 5 Division 22 to Article 10 as follows: 6 (35 ILCS 200/Art. 10 Div. 22 heading new) 7 Division 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 11 of: (1) the quotient generated by dividing the actual age in 12 years of the commercial energy storage system on the 13 assessment date by 15 years; multiplied by (2) the commercial 14 energy storage system's trended real property cost basis. The 15 allowance for physical depreciation may not exceed an amount 16 that reduces the value of the commercial energy storage system 17 to 30% of its trended real property cost basis or less. 18 "Commercial energy storage system" means any device or 19 assembly of devices that (i) is either installed as a 20 stand-alone system or tied to a power generation system, (ii) 21 is used for the primary purpose of storing of energy for 22 wholesale or retail sale and not primarily for storage to 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 new35 ILCS 200/10-920 new35 ILCS 200/10-925 new35 ILCS 200/10-935 new35 ILCS 200/10-940 new35 ILCS 200/10-945 new35 ILCS 200/10-950 new35 ILCS 200/10-955 new35 ILCS 200/10-960 new 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 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 LRB104 05726 HLH 15756 b LRB104 05726 HLH 15756 b A BILL FOR 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 LRB104 05726 HLH 15756 b SB1526 LRB104 05726 HLH 15756 b SB1526- 2 -LRB104 05726 HLH 15756 b SB1526 - 2 - LRB104 05726 HLH 15756 b SB1526 - 2 - LRB104 05726 HLH 15756 b 1 later consume on the property on which the device resides, and 2 (iii) is an energy storage system as defined in Section 16-135 3 of the Public Utilities Act. 4 "Commercial energy storage system real property cost 5 basis" means the owner of the commercial energy storage 6 system's interest in the land within the project boundaries 7 and real property improvements and shall be calculated at $124 8 per kilowatt hour (kWh) of rated kilowatt hour (kWh) energy 9 capacity. 10 "Consumer Price Index" means the index published by the 11 Bureau of Labor Statistics of the United States Department of 12 Labor that measures the average change in prices of goods and 13 services purchased by all urban consumers, United States city 14 average, all items, 1982-84 = 100. 15 "Rated kWh energy capacity" means the maximum amount of 16 stored energy in kilowatt hours. 17 "Trended real property cost basis" means the commercial 18 energy storage system real property cost basis multiplied by 19 the trending factor. 20 "Trending factor" means the number generated by dividing 21 the Consumer Price Index published by the Bureau of Labor 22 Statistics in the December immediately preceding the 23 assessment date by the Consumer Price Index published by the 24 Bureau of Labor Statistics in December of 2024. 25 (35 ILCS 200/10-925 new) SB1526 - 2 - LRB104 05726 HLH 15756 b SB1526- 3 -LRB104 05726 HLH 15756 b SB1526 - 3 - LRB104 05726 HLH 15756 b SB1526 - 3 - LRB104 05726 HLH 15756 b 1 Sec. 10-925. Improvement valuation of commercial energy 2 storage systems in counties with fewer than 3,000,000 3 inhabitants. Beginning in assessment year 2025, the fair cash 4 value of commercial energy storage system improvements in 5 counties with fewer than 3,000,000 inhabitants shall be 6 determined by subtracting the allowance for physical 7 depreciation from the commercial energy storage system trended 8 real property cost basis. Functional obsolescence and external 9 obsolescence of the commercial energy storage system 10 improvements may further reduce the fair cash value of the 11 commercial energy storage system improvements to the extent 12 they are proven by the taxpayer by clear and convincing 13 evidence, except that the combined depreciation from all 14 physical, functional, and economic obsolescence shall not 15 exceed 70% of the trended real property cost basis. The chief 16 county assessment officer may make reasonable adjustments to 17 the actual age of the commercial energy storage system to 18 account for the routine replacement or upgrade of system 19 components. 20 (35 ILCS 200/10-935 new) 21 Sec. 10-935. Commercial energy storage systems not subject 22 to equalization. Commercial energy storage systems that are 23 subject to assessment under this Division are not subject to 24 equalization factors applied by the Department or by any board 25 of review, assessor, or chief county assessment officer. SB1526 - 3 - LRB104 05726 HLH 15756 b SB1526- 4 -LRB104 05726 HLH 15756 b SB1526 - 4 - LRB104 05726 HLH 15756 b SB1526 - 4 - LRB104 05726 HLH 15756 b 1 (35 ILCS 200/10-940 new) 2 Sec. 10-940. Survey for commercial energy storage systems; 3 parcel identification numbers for property improved with a 4 commercial energy storage system. Notwithstanding any other 5 provision of law, the owner of the commercial energy storage 6 system shall commission a metes and bounds survey description 7 of the land upon which the commercial energy storage system is 8 located, including access routes, over which the owner of the 9 commercial energy storage system has exclusive control. Land 10 held for future development shall not be included in the 11 project area for real property assessment purposes. The owner 12 of the commercial energy storage system shall, at the owner's 13 own expense, use an Illinois-registered land surveyor to 14 prepare the survey. The owner of the commercial energy storage 15 system shall deliver a copy of the survey to the chief county 16 assessment officer and to the owner of the land upon which the 17 commercial energy storage system is located. Upon receiving a 18 copy of the survey and an agreed acknowledgment to the 19 separate parcel identification number by the owner of the land 20 upon which the commercial energy storage system is 21 constructed, the chief county assessment officer shall issue a 22 separate parcel identification for the real property 23 improvements, including the land containing the commercial 24 energy storage system, to be used only for the purposes of 25 property assessment for taxation. If no survey is provided, SB1526 - 4 - LRB104 05726 HLH 15756 b SB1526- 5 -LRB104 05726 HLH 15756 b SB1526 - 5 - LRB104 05726 HLH 15756 b SB1526 - 5 - LRB104 05726 HLH 15756 b 1 the chief county assessment officer shall determine the area 2 of the site that is occupied by the commercial energy storage 3 system. That determination shall be final and may not be 4 challenged on review by the owner of the commercial energy 5 storage system. The property records shall contain the legal 6 description of the commercial energy storage system parcel and 7 describe any leasehold interest or other interest of the owner 8 of the commercial energy storage system in the property. A 9 plat prepared under this Section shall not be construed as a 10 violation of the Plat Act. 11 Surveys that are prepared in accordance with either 12 Section 10-740 or Section 10-620 and that also include the 13 location of a commercial energy storage system in their metes 14 and bounds description shall satisfy the requirements of this 15 Section. 16 (35 ILCS 200/10-945 new) 17 Sec. 10-945. Real estate taxes. Notwithstanding the 18 provisions of Section 9-175 of this Code, the owner of the 19 commercial energy storage system shall be liable for the real 20 estate taxes for the land and real property improvements of 21 the commercial energy storage system. Notwithstanding the 22 foregoing, the owner of the land upon which a commercial 23 energy storage system is located may pay any unpaid tax of the 24 commercial energy storage system parcel prior to the 25 initiation of any tax sale proceedings. SB1526 - 5 - LRB104 05726 HLH 15756 b SB1526- 6 -LRB104 05726 HLH 15756 b SB1526 - 6 - LRB104 05726 HLH 15756 b SB1526 - 6 - LRB104 05726 HLH 15756 b 1 (35 ILCS 200/10-950 new) 2 Sec. 10-950. Property assessed as farmland. 3 Notwithstanding any other provision of law, real property 4 assessed as farmland in accordance with Section 10-110 in the 5 assessment year prior to valuation under this Division shall 6 return to being assessed as farmland in accordance with 7 Section 10-110 in the year following completion of the removal 8 of the commercial energy storage system as long as the 9 property is returned to a farm use as defined in Section 1-60, 10 notwithstanding that the land was not used for farming for the 11 2 preceding years. 12 (35 ILCS 200/10-955 new) 13 Sec. 10-955. Abatements. Any taxing district may, upon a 14 majority vote of its governing authority and after the 15 determination of the assessed valuation as set forth in this 16 Code, order the clerk of the appropriate municipality or 17 county to abate any portion of real property taxes otherwise 18 levied or extended by the taxing district on a commercial 19 energy storage system. 20 (35 ILCS 200/10-960 new) 21 Sec. 10-960. Applicability. The provisions of this 22 Division apply for assessment years 2025 through 2040. 23 Section 99. Effective date. This Act takes effect upon SB1526 - 6 - LRB104 05726 HLH 15756 b SB1526- 7 -LRB104 05726 HLH 15756 b SB1526 - 7 - LRB104 05726 HLH 15756 b SB1526 - 7 - LRB104 05726 HLH 15756 b SB1526 - 7 - LRB104 05726 HLH 15756 b