Ontario Working for Workers Four Act (AI disclosure in job postings): requirements, deadlines and compliance actions
Working for Workers Four Act, 2024 (Bill 149): disclosure of artificial intelligence use in publicly advertised job postings
What is Ontario Working for Workers Four Act (AI disclosure in job postings)?
Amends the Employment Standards Act, 2000 to require employers with 25 or more employees to disclose in every publicly advertised job posting whether artificial intelligence is used to screen, assess or select applicants, alongside new rules on salary ranges and Canadian-experience requirements. The AI disclosure requirement is in force from 1 January 2026.
Who does it apply to?
Employers in Ontario with 25 or more employees publishing public job postings.
- Sectors
- Employment and HR
- AI use cases
- AI in hiring and employment
- Risk categories
- Transparency obligations
- AI system types
- Automated decision-making system
When do the requirements apply?
2024-03-21: royal assent; 2026-01-01: job-posting provisions in force.
Dates are taken from the linked official source; a reviewer should confirm in-force and application dates before relying on them.
Official sources
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Bill 149, Working for Workers Four Act, 2024
Legislative Assembly of Ontario · 21 Mar 2024 · Tier 1 source
Change history
Record version 1: Added in the September 2026 global coverage expansion from the official source listed; reviewer to confirm dates, status and scope against the source text.. Full edit history is in the GitHub repository.
Informational only, not legal advice. Verify every claim against the linked official sources and consult qualified counsel before acting.