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
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On this page 8 sections
In brief
Ontario Working for Workers Four Act (AI disclosure in job postings) is a binding act of Ontario (Canada), issued by Legislative Assembly of Ontario. It has been in force since 1 January 2026. Employers in Ontario with 25 or more employees publishing public job postings.
- Jurisdiction
- Ontario (Canada)
- Instrument type
- Act / statute
- Status
- In force
- Legal force
- Binding
- Issuing body
- Legislative Assembly of Ontario
- Adopted
- 21 March 2024
- In force
- 1 January 2026
- Applies from
- 1 January 2026
- Official source
- Bill 149, Working for Workers Four Act, 2024
- Verification
- Verified against the official source 26 Sep 2026
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
-
Bill 149, Working for Workers Four Act, 2024
Legislative Assembly of Ontario · 21 Mar 2024 · Tier 1 source
Cite this record
AIPolicyTracker (2026). “Ontario Working for Workers Four Act (AI disclosure in job postings)” [AIPT-POL-0038, record version 1, verified 26 September 2026 by Bhaskar Bhatt]. https://aipolicytracker.org/id/AIPT-POL-0038 (accessed 27 October 2026). Data licensed CC BY 4.0.
Permanent id AIPT-POL-0038: it never changes or gets reused, and its address keeps working if this page moves.
Cite the official text alongside it: Bill 149, Working for Workers Four Act, 2024, Legislative Assembly of Ontario, https://www.ola.org/en/legislative-business/bills/parliament-43/session-1/bill-149.
BibTeX
@misc{aipolicytracker2026_ontarioworkingforworkers,
author = {{AIPolicyTracker}},
title = {{Ontario Working for Workers Four Act (AI disclosure in job postings)}},
year = {2026},
howpublished = {\url{https://aipolicytracker.org/policies/ca-ontario-working-for-workers-four-act-ai-in-job-postings}},
url = {https://aipolicytracker.org/policies/ca-ontario-working-for-workers-four-act-ai-in-job-postings},
urldate = {2026-10-27},
note = {Data licensed CC BY 4.0. Accessed 27 October 2026}
}
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Record history
No change to this record's tracked fields has been recorded since 15 October 2026, when field-level history began.
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. Every earlier wording is in the GitHub repository.
Frequently asked questions
Is Ontario Working for Workers Four Act (AI disclosure in job postings) in force?
Yes. Ontario Working for Workers Four Act (AI disclosure in job postings) is in force since 1 January 2026.
Is Ontario Working for Workers Four Act (AI disclosure in job postings) legally binding?
Yes. Ontario Working for Workers Four Act (AI disclosure in job postings) is a binding act / statute; the obligations it creates are legal requirements for the actors it covers.
Who does Ontario Working for Workers Four Act (AI disclosure in job postings) apply to?
Employers in Ontario with 25 or more employees publishing public job postings.
When does Ontario Working for Workers Four Act (AI disclosure in job postings) apply?
2024-03-21: royal assent; 2026-01-01: job-posting provisions in force.
Where is the official text of Ontario Working for Workers Four Act (AI disclosure in job postings)?
The official text is published by Legislative Assembly of Ontario at https://www.ola.org/en/legislative-business/bills/parliament-43/session-1/bill-149 (Bill 149, Working for Workers Four Act, 2024). This record links to it and is checked against it.
Disclaimer: informational only, not legal advice. Verify every claim against the linked official sources and consult a qualified lawyer before acting.