Illinois SB 343 — Ban on Algorithmic Residential Rental Price-Fixing
Illinois · IL SB343 (104th General Assembly, 2025-2026)
Would amend the Illinois Antitrust Act to ban landlords from using shared rent-setting algorithms or third-party pricing software (such as RealPage) to coordinate residential rental prices. Targets "algorithmic" or "AI-enabled" rent price-fixing, where competing landlords feed data into a common service that recommends prices, indirectly coordinating rents across the market. Prohibits fixing, controlling, or maintaining rental pricing or terms for residential units, including through any service or product that involves price coordination.
Technical detail
Amends the Illinois Antitrust Act to make it a violation to engage in price coordination — or to use, subscribe to, or contract with a service that involves price coordination — for residential rental units in Illinois, including through the sale, licensure, or provision of any service or product (e.g., a shared rent-setting algorithm) that coordinates pricing across competing landlords. Responds to the RealPage algorithmic rent-pricing controversy. Cleared both chambers 2026-06-01 (House 75-34-1; Senate 34-21-0; Senate concurrence 51-6-0); awaiting transmittal to and action by the Governor as of 2026-06-25 — not yet enacted.
Who is protected: Illinois residential renters subject to algorithmically coordinated rent pricing.
Who must comply: Landlords and providers of rent-setting algorithm / pricing-coordination software and services operating in Illinois.
Key facts
| Jurisdiction | Illinois |
|---|---|
| Level | State |
| Status | Proposed / pending |
| Protection strength | Proposed or pending |
| Citation | IL SB343 (104th General Assembly, 2025-2026) |
| Enforced by | Illinois Attorney General (Illinois Antitrust Act enforcement) |
| Penalties | As provided under the Illinois Antitrust Act. |
| Topics | housing and credit decisions · automated decision-making · consumer protection |
| Last verified | 2026-06-25 |
| Official source | Illinois General Assembly — SB0343 Bill Status (104th GA) ↗ |
More AI rules in Illinois
- AI Safety Measures Act (frontier model audits) · Enacted (not yet in effect)
- Illinois Children's Social Media Safety Act — algorithmic recommendations ban for minors · Enacted (not yet in effect)
- Illinois SB 3114 — Transparency in Downcoding Act · Enacted (not yet in effect)
- IL AV local-preemption (2017) · In effect
- IL Drone Surveillance Act · In effect
- BIPA · In effect
Related housing and credit decisions rules elsewhere
- Connecticut algorithmic rent ban — HB 8002 (eff. Jan 1, 2026) · In effect
- San Diego algorithmic rent price-fixing ban (Ord. O-21955, May 2025) · In effect
- Minneapolis algorithmic rent ban (Ord. 2025-010, eff. Mar 1, 2026) · In effect
- Seattle algorithmic rent-fixing ban (Ord. 127241 / SMC 7.34, July 2025) · In effect
- Hoboken Algorithmic Rent-Fixing Ban · In effect
- Santa Monica Algorithmic Rent-Setting Ban · In effect
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