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HB1427 • 2026
ALGORITHMICS PROHIBITED-RENT
This bill passed both chambers and reached final enrollment, even if later executive action is not shown here.
Using official source text because the generated explanation was unavailable or could not be confirmed against the official bill text.
ALGORITHMICS PROHIBITED-RENT
Rule 19(a) / Re-referred to Rules Committee
Added Chief Co-Sponsor Rep. Stephanie A. Kifowit
Assigned to Housing Committee
Rule 19(a) / Re-referred to Rules Committee
Assigned to Housing Committee
First Reading
Referred to Rules Committee
Chief Sponsor Changed to Rep. Lilian Jiménez
Added Chief Co-Sponsor Rep. Kevin John Olickal
Filed with the Clerk by Rep. Kevin John Olickal
ALGORITHMICS PROHIBITED-RENT
Illinois General Assembly - Full Text of HB1427 Select Language × The Illinois General Assembly offers the Google Translate™ service for visitor convenience. In no way should it be considered accurate as to the translation of any content herein. Visitors of the Illinois General Assembly website are encouraged to use other translation services available on the internet. The English language version is always the official and authoritative version of this website. NOTE: To return to the original English language version, select the "Show Original" button on the Google Translate™ menu bar at the top of the window. 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Full Text of HB1427 Home Legislation Full Text HB1427 - 104th General Assembly Bill Status Full Text Votes Witness Slips Select Menu Bill Status Full Text Votes Witness Slips Printer Friendly Version Introduced Printer Friendly Version Introduced Open PDF 104TH GENERAL ASSEMBLY State of Illinois 2025 and 2026 HB1427 Introduced 1/28/2025, by Rep. Lilian Jiménez - Kevin John Olickal SYNOPSIS AS INTRODUCED: New Act 815 ILCS 505/2HHHH new Creates the Prohibition of Algorithmics in Rent Act. Provides that in setting the amount of rent to be charged to a tenant for the occupancy of a residential premises, including determining any change in the amount of rent to be charged for the renewed occupancy of a residential premises, a landlord shall not employ, use, or rely upon, or cause another person to employ, use, or rely upon, an algorithmic device that uses, incorporates, or was trained with nonpublic competitor data. Defines "algorithmic device" to mean a device that uses one or more algorithms to perform calculations of data, including data concerning local or statewide rent amounts being charged to tenants by landlords, for the purpose of advising a landlord concerning the amount of rent that the landlord may consider charging a tenant. Provides that this definition does not include (i) any report published periodically, but no more frequently than monthly, by a trade association that receives renter data and publishes it in an aggregated and anonymous manner; or (ii) a product used for the purpose of establishing rent or income limits in accordance with the affordable housing program guidelines of a local government, the State, the federal government, or other political subdivision. Amends the Consumer Fraud and Deceptive Business Practices Act to make a corresponding change. Provides that any person who violates the Prohibition of Algorithmics in Rent Act commits an unlawful practice within the meaning of the Consumer Fraud and Deceptive Business Practices Act. LRB104 05786 SPS 15816 b A BILL FOR HB1427 LRB104 05786 SPS 15816 b 1 AN ACT concerning property. 2 Be it enacted by the People of the State of Illinois, 3 represented in the General Assembly: 4 Section 1. Short title. This Act may be cited as the 5 Prohibition of Algorithmics in Rent Act. 6 Section 5. Legislative intent. The General Assembly finds 7 that, with certain exceptions, the use of an algorithmic 8 device by a landlord to set the amount of a residential 9 tenant's rent should be prohibited because the use of 10 algorithmic devices: 11 (1) has been the subject of lawsuits that allege such 12 products pose a heightened risk of anticompetitive 13 conduct, price fixing, and collusion, all of which 14 allegedly result in higher rents for residential tenants; 15 and 16 (2) allegedly poses the risk that landlords will 17 outsource pricing decisions, which the General Assembly 18 finds should always be made by the landlord. 19 Section 10. Definitions. As used in this Act: 20 "Algorithmic device" means a device that uses one or more 21 algorithms to perform calculations of data, including data 22 concerning local or statewide rent amounts being charged to HB1427 - 2 - LRB104 05786 SPS 15816 b 1 tenants by landlords, for the purpose of advising a landlord 2 concerning the amount of rent that the landlord may consider 3 charging a tenant. It includes a product that incorporates an 4 algorithmic device but does not include: 5 (1) any report published periodically, but no more 6 frequently than monthly, by a trade association that 7 receives renter data and publishes it in an aggregated and 8 anonymous manner; or 9 (2) a product used for the purpose of establishing 10 rent or income limits in accordance with the affordable 11 housing program guidelines of a local government, the 12 State, the federal government, or other political 13 subdivision. 14 "Nonpublic competitor data" means information that is not 15 widely available or easily accessible to the public, including 16 information about actual rent prices, occupancy rates, lease 17 start and end dates, and similar data, regardless of whether 18 the data are attributable to a specific competitor or 19 anonymized, and that is derived from or otherwise provided by 20 another person that competes in the same market as a person, or 21 a related market. 22 "Rent" means the total amount of rent, including 23 concessions and fees, that a residential tenant is required to 24 pay under a rental agreement. 25 Section 15. Algorithmic device in setting rent amount HB1427 - 3 - LRB104 05786 SPS 15816 b 1 prohibited. 2 (a) In setting the amount of rent to be charged to a tenant 3 for the occupancy of a residential premises, including 4 determining any change in the amount of rent to be charged for 5 the renewed occupancy of a residential premises, a landlord 6 shall not employ, use, or rely upon, or cause another person to 7 employ, use, or rely upon, an algorithmic device that uses, 8 incorporates, or was trained with nonpublic competitor data. 9 (b) A violation of this Act constitutes an unlawful 10 practice within the meaning of the Consumer Fraud and 11 Deceptive Business Practices Act. 12 Section 20. Applicability. This Act applies to a 13 landlord's calculation of the amount of rent that the landlord 14 charges for the occupancy of a residential premises under any 15 rental agreement that is executed on or after the effective 16 date of this Act. 17 Section 90. The Consumer Fraud and Deceptive Business 18 Practices Act is amended by adding Section 2HHHH as follows: 19 (815 ILCS 505/2HHHH new) 20 Sec. 2HHHH. Violations of the Prohibition of Algorithmics 21 in Rent Act. Any person who violates the Prohibition of 22 Algorithmics in Rent Act commits an unlawful practice within 23 the meaning of this Act. Footer Disclaimer This site is maintained for the Illinois General Assembly by the Legislative Information System, 705 Stratton Building, Springfield, Illinois 62706. Contact ILGA Webmaster ILGA.gov uses cookies to ensure you get the best experience on our website. By continuing to browse ILGA.gov you consent to our use of cookies. Read About Cookies ILGA.GOV 2026 ILGA.gov | All Rights Reserved | ADA | Disclaimers | Learn This site is maintained for the Illinois General Assembly by the Legislative Information System, 705 Stratton Building, Springfield, Illinois 62706. 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