Ontario’s AI hiring rule is hiding inside your applicant tracking system

Ontario employers with 25 or more staff have had to say in public job postings whether AI screens, assesses or selects applicants since January 1, 2026, under the province’s AI job posting disclosure rule. The trigger is usually a feature inside the hiring software, not a tool anyone chose on purpose.

The Ontario AI job posting disclosure rule has been in force for ten months, and writing the sentence takes a minute. The slower job is finding out whether your applicant tracking system ranks, scores or filters candidates before a person reads a single résumé. Our view is that this is an operations question, not a legal one, and it belongs to whoever owns the posting template.

What does the Ontario AI job posting disclosure rule require?

When software with AI helps decide which applicants move forward on a public posting, the ad has to carry a line that says so. The province’s Employment Standards Act guide says a short statement is enough, with no detailed description of the system needed.

The requirement sits in section 8.4 of the Employment Standards Act, 2000 and took effect on January 1, 2026. The same set of changes added three other posting duties: an expected pay or pay range, a line saying whether the vacancy exists, and no “Canadian experience” requirement. Employers also have to tell interviewed applicants whether a hiring decision has been made.

Which Ontario employers does it cover?

Employers with 25 or more employees on the day the posting is posted, under Ontario Regulation 476/24. A firm with 22 staff in March and 27 in October can fall under the rule partway through the year, so the headcount check belongs on the day each posting goes live.

The regulation also sets out what is not a “publicly advertised job posting”: a general recruitment campaign with no specific position, a general help wanted sign, a posting open only to current employees, and a role whose work is done outside Ontario. A Calgary firm hiring a Toronto sales rep is in scope. A Toronto firm hiring a Calgary rep for work done in Alberta generally is not.

Where is AI hiding in a normal hiring process?

Usually in the software you already pay for. The regulation defines artificial intelligence as a machine-based system that infers from its inputs to produce outputs such as predictions, recommendations or decisions. That is wide enough to catch features many teams treat as plumbing. The province’s guide adds that whether a given system falls inside the definition depends on the facts of each case, so a careful reading of your own tools beats a guess.

The last line is the one most teams skip. Someone who drops 200 résumés into a chatbot and asks for the top ten is using AI to screen applicants, even if the company never bought an AI product. The rule does not care whether the tool was approved.

Who owns the disclosure when a recruiter or job board does the screening?

You do. The province’s guide says the duty applies equally when a third party, such as a recruiting firm, screens, assesses or selects applicants on your behalf, and the employer is responsible for making sure the statement appears. Postings placed on a third-party site, such as a job bank, fall under the same rule.

In practice that means one owner per posting template, usually the HR lead, or the owner in a smaller firm. That person keeps the approved wording, asks each recruiter one written question before a role goes live, and checks the posting on the board after it publishes. Our earlier look at AI and entry-level hiring in Canada covers the wider shift in how first jobs are filled, and the AI for business hub collects our other operating guides.

What should the statement actually say?

Something short and true. For example: “We use artificial intelligence to help screen applications for this role. A person reviews every shortlist.” Only write the second sentence if it is true. If a human reads every application, say nothing about AI. If AI scores every candidate, say so plainly and stop there.

The statement is also the cheapest trust signal you will put in a posting. Candidates in Toronto, Ottawa or Thunder Bay can already see the pay range in the same ad. A clear AI line tells them how the first cut is made, which is the question many applicants now ask anyway.

What would change our view

If the province publishes enforcement guidance that narrows “artificial intelligence” to purpose-built hiring tools, the chatbot line in our checklist would matter less. Until then, we would treat any automated ranking or scoring step as in scope and disclose it.

Try This Week

Task: audit one live Ontario posting against the five-line checklist above.
Owner: whoever controls your posting template.
Baseline: today’s posting, as candidates see it on the job board.
Metric: number of hiring steps where you could not confirm, in writing, whether AI is used.
Threshold: zero unknowns before the next posting goes live.
Deadline: Friday, then update the template once so every later posting inherits it.

FAQ

Do small Ontario businesses have to disclose AI in job postings?

Not if they have fewer than 25 employees on the day the posting goes up. Ontario Regulation 476/24 exempts them, though the headcount is checked per posting, so a growing firm can cross the line mid-year.

Does the Ontario rule apply if a recruiter uses AI for us?

Yes. The province’s guide says the employer is responsible for the statement when a third party, such as a recruiting firm, screens, assesses or selects applicants on its behalf.

How detailed does the AI disclosure need to be?

One sentence will do. Per the province’s guide, you only need to say that AI plays a part in screening or choosing candidates, with no technical description.