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Find a Lawyer » Canada Legal Guides » Ontario Legal Guides » Work & Employment Rights Ontario » Polygraph and Lie Detector Tests in Ontario Workplaces: Are They Legal?

Polygraph and Lie Detector Tests in Ontario Workplaces: Are They Legal?

9 Jun 2026 4 min read No comments Work & Employment Rights Ontario
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In Ontario, it is strictly illegal for an employer to require, request, or even suggest that an employee or job applicant take a lie detector test. Under the Employment Standards Act (ESA), you have the absolute right to refuse a polygraph without facing any disciplinary action or termination.

Trust is the foundation of any healthy working relationship, but some companies attempt to take workplace security entirely too far. 🕵 If there is a suspected theft, a breach of confidentiality, or a high-stakes hiring process, an overzealous manager might ask you to prove your honesty by sitting down for a polygraph examination. For many workers, simply being asked to take such a test is incredibly intimidating and stressful.

Fortunately, the law is completely on your side. The Ontario Employment Standards Act (ESA) expressly prohibits employers from using lie detectors in the workplace. Whether you are applying for a retail job in Toronto, working at a warehouse in Brampton, or managing an office in Ottawa, your employer cannot force you to prove your innocence through a polygraph machine.

Step-by-Step Process: Handling a Polygraph Request in Ontario

If your boss or HR department approaches you about taking a lie detector test, it is crucial to handle the situation calmly and legally. 📋 You are heavily protected by provincial labour laws, but documenting the interaction is key to preserving your rights.

Step 1: Document the Employer’s Request

Employers often make these requests verbally to avoid leaving a paper trail. If your manager asks you to take a polygraph, immediately send them an email confirming the conversation. State something simple, such as: “I am writing to confirm our meeting today where I was asked to submit to a lie detector test regarding the missing inventory.” This written proof is invaluable if you are illegally penalized later.

Step 2: Formally Refuse the Test

You have the absolute right to say no. 🗂 Clearly inform your employer that you decline the test and gently remind them that requesting a polygraph is a violation of the Employment Standards Act. Under the ESA, an employer cannot fire, demote, or suspend you simply because you exercised your legal right to refuse a lie detector test.

Step 3: File a Claim with the Ministry of Labour

If your employer ignores your refusal, forces the test anyway, or fires you for saying no, you must take immediate action. You can file a formal employment standards claim online with the Ontario Ministry of Labour, Immigration, Training and Skills Development. A provincial officer will investigate the employer for violating the ESA and can order them to compensate you or reinstate your employment.

How Much Does it Cost in Ontario?

Defending your fundamental workplace rights does not have to be an expensive legal battle. 💵 Here is a look at the estimated costs in Canadian dollars (CAD) if you need to escalate the issue.

Action / ServiceEstimated Cost in CADDetails
Ministry of Labour Claim$0Filing an official complaint with the provincial government is completely free.
Employment Lawyer Consultation$300 to $600A one-hour session to discuss a potential wrongful dismissal or constructive dismissal lawsuit.
Full Civil Litigation$5,000 to $15,000+If you are fired and choose to sue for severance pay instead of using the Ministry.
  • Human Rights Complaints: If the lie detector test was used discriminatorily (e.g., only racial minorities were asked to take it), filing an application at the Human Rights Tribunal of Ontario is also completely free.
  • Contingency Fees: If you are wrongfully terminated over a polygraph refusal, many Ontario law firms will take your case on a contingency basis, taking 25% to 35% of your final settlement.

How Long Does the Process Take?

If you file a formal complaint with the Ministry of Labour, you will need to be patient. ⏱ It typically takes 2 to 4 months for a provincial investigating officer to be assigned to your file. If you were illegally terminated and choose to sue your employer for wrongful dismissal in the Ontario civil court system, reaching a final settlement or trial can take anywhere from 10 months to 2 years.

Frequently Asked Questions (FAQ)

Can police force me to take a polygraph for a workplace theft?

No. Even if your employer calls the local police to investigate a workplace crime, the police cannot force you to take a polygraph. In Canada, taking a police polygraph test is always strictly voluntary, and the results are generally not even admissible in criminal court.

What if my employment contract says I agree to polygraphs?

That clause is legally void. Under Ontario law, an employer and an employee cannot contract out of the Employment Standards Act minimums. Even if you signed a paper agreeing to take lie detector tests, the employer still cannot legally enforce it.

Are there any exceptions for security guards or police officers?

Yes, there are very specific exemptions. Police officers and certain levels of provincial, municipal, or federal law enforcement applicants may be legally required to take polygraph tests during their extensive background screening process.

Can they ask me to take a written “honesty questionnaire” instead?

Written personality or psychological tests are generally permissible in Ontario workplaces, provided they do not violate human rights laws or measure physiological changes. The ESA specifically bans devices (like polygraphs) that measure biological responses to assess truthfulness.

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