What it is
House Bill 3773 — an amendment to the Illinois Human Rights Act that expressly prohibits employers from using AI that has the effect of subjecting employees or applicants to discrimination on the basis of a protected class. Effective January 1, 2026.
Illinois became the second US state (after Colorado, now repealed) to pass a broad AI-in-employment law. With Colorado off the board, Illinois is now the most aggressive US state AI employment regime in force.
Who it covers
Any employer with one or more employees in Illinois during 20 or more calendar weeks of the year. The “AI” definition is broad — any machine-based system that infers how to generate outputs such as predictions, content, recommendations, or decisions, explicitly including generative AI.
Where it applies (employment lifecycle)
- Recruitment and hiring
- Promotion
- Renewal of employment
- Selection for training or apprenticeship
- Discharge and discipline
- Tenure
- Terms, privileges, or conditions of employment
What it requires
1. Anti-discrimination (strict liability). Employers may not use AI in a way that produces a discriminatory effect on protected classes. Intent is no longer a defense. If the system has discriminatory impact, the employer is liable — regardless of whether the discrimination was intentional or known.
The law expressly prohibits using zip codes as proxies for protected classes.
2. Candidate / employee notice. Employers must provide formal notification when AI is used in employment decisions. The Illinois Department of Human Rights has issued draft rules specifying:
- Circumstances and conditions that require notice
- Time period for providing notice
- Means for providing notice
Final rules are expected to track the draft closely.
Enforcement (the part most counsels are underestimating)
Two enforcement pathways — and the second is the one that changes the litigation calculus:
- Administrative. Charge filed with the Illinois Human Rights Commission.
- Private right of action. Civil complaint filed directly in Illinois Circuit Court.
Illinois is the only US state AI employment law with a private right of action. Texas TRAIGA is AG-only. Colorado’s repealed SB 24-205 was AG-only. NYC LL144 is administrative-only.
The practical consequence: plaintiff’s employment firms can build a docket of AI-discrimination cases without waiting for regulatory action. Class-action exposure is materially higher than under any other US AI law currently in force.
Penalties
Standard Illinois Human Rights Act remedies — back pay, reinstatement, compensatory damages, attorney’s fees, and (where applicable) punitive damages. Patterns-and-practice cases can produce class-wide remedies.
Practical posture
- Inventory every AI system touching the employment lifecycle, including ATS scoring, video interview analysis, productivity monitoring, and generative-AI tooling used in any of the 7 covered decision categories
- Disparate-impact testing every 12 months at minimum, documented, with results retained — strict liability means you need contemporaneous evidence that the system did not produce discriminatory outputs at the time of use
- Notice templates ready to deploy across recruitment, performance review, and termination workflows
- Vendor diligence: confirm that any third-party AI tool used in employment decisions has its own bias-audit documentation you can produce on demand
- Document retention: the evidence you can produce in a private-action discovery request is now the load-bearing layer of compliance
What to watch
- Illinois Department of Human Rights final notice rules
- First plaintiff’s-bar cases filed under the private right of action (expected mid-to-late 2026)
- Whether other states (Massachusetts, New York State, New Jersey) follow Illinois’s private-right-of-action model
