# Working for Workers Four Act, 2024 (Bill 149): disclosure of artificial intelligence use in publicly advertised job postings

- **Record type**: Policy instrument
- **Jurisdiction**: Ontario (Canada)
- **Instrument type**: Act / statute
- **Status**: In force
- **Binding**: Yes
- **Issuing body**: Legislative Assembly of Ontario
- **Adopted**: 2024-03-21
- **In force**: 2026-01-01
- **Applies from**: 2026-01-01

## 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.

## Summary

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.

## Scope

Employers in Ontario with 25 or more employees publishing public job postings.

## Key dates

2024-03-21: royal assent; 2026-01-01: job-posting provisions in force.

## Notes on dates

Dates are taken from the linked official source; a reviewer should confirm in-force and application dates before relying on them.

## Provenance

- **Permanent id**: AIPT-POL-0038 (https://aipolicytracker.org/id/AIPT-POL-0038; never changes or gets reused)
- **Record page**: https://aipolicytracker.org/policies/ca-ontario-working-for-workers-four-act-ai-in-job-postings
- **Official source**: https://www.ola.org/en/legislative-business/bills/parliament-43/session-1/bill-149
- **Source document**: Bill 149, Working for Workers Four Act, 2024
- **Published by**: Legislative Assembly of Ontario
- **Review status**: verified
- **Confidence**: high
- **Facts last confirmed**: 2026-09-26
- **Confirmed by**: Bhaskar Bhatt (see https://aipolicytracker.org/reviewers)
- **Retrieved**: 2026-10-27
- **Licence**: https://creativecommons.org/licenses/by/4.0/
- **Cite as**: AIPolicyTracker (2026). "Working for Workers Four Act, 2024 (Bill 149): disclosure of artificial intelligence use in publicly advertised 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).

> This record is a structured summary with a link to the official text. It is not legal advice. Open the official source before relying on any date or duty. How current each record type must be is published at https://aipolicytracker.org/verification; what a record must carry at all is published at https://aipolicytracker.org/coverage.