Ontario Working for Workers Four Act, 2024 — AI Hiring Disclosure (job-posting rules): AI Compliance Requirements

Who Does This Apply To?

Applies ONLY to employers with 25 or more employees in Ontario, counted on the day a publicly advertised job posting is posted, under the Working for Workers Four Act, 2024 (job-posting provisions added to the Employment Standards Act, 2000, ss. 8.1–8.6, and O. Reg. 476/24; effective January 1, 2026). "Publicly advertised job posting" means an external job posting that an employer (or a person acting on its behalf) advertises to the general public, subject to prescribed exclusions. In scope means: where the covered employer uses artificial intelligence to "screen, assess, or select" applicants for such a posting, the posting must include a statement disclosing the use of AI. O. Reg. 476/24 defines artificial intelligence as a machine-based system that, for explicit or implicit objectives, infers from the input it receives in order to generate outputs such as predictions, content, recommendations, or decisions that can influence physical or virtual environments. The covered employer must also retain every publicly advertised posting + associated application form + interviewed-candidate notification records for three years after public access to the posting is removed. EXEMPT: employers with fewer than 25 employees; general recruitment campaigns not tied to a specific position; internal-only postings limited to existing employees; and positions where the work is or will be performed outside Ontario (and is not a continuation of Ontario work). There is NO internal-AI-policy-posting requirement under these rules. This is Canada's first province-level mandatory AI-hiring-disclosure rule. Enforced by employment standards officers under the ESA (Ministry of Labour, Immigration, Training and Skills Development).