Can an Employee Sue Their Employer in Quebec? The Rule, the Exceptions and the Deadlines

Can an employee sue their employer in Quebec after a workplace accident? In the vast majority of cases, no: the Act respecting industrial accidents and occupational diseases (Loi sur les accidents du travail et les maladies professionnelles, LATMP) gives the employer civil immunity, and a worker who suffers an employment injury is compensated by the Commission des normes, de l’équité, de la santé et de la sécurité du travail (CNESST), Quebec’s workplace health, safety and labour standards board, instead of by a civil court. Stopping there would be a half truth. Real exceptions exist, real people can still be sued, and several remedies are not civil lawsuits at all yet settle the majority of actual files.

This guide sets out the rule, then each exception, with the section of the Act behind it and the deadline attached to it. In practice, a remedy almost always dies on a deadline, never on the merits.

The Rule in Three Sentences

Against other people, the courts stay open. A liable third party, another employer subject to the Act who has committed a criminal offence, a health professional who makes your injury worse: the LATMP does not shield them the same way.

And a civil lawsuit is not your only remedy. Contesting a CNESST decision, filing a complaint for dismissal or reprisals, filing a psychological harassment complaint: these are administrative remedies, each with its own deadline, heard by the Administrative Labour Tribunal (Tribunal administratif du travail, TAT) rather than by a civil court.

The Employer’s Civil Immunity Under the LATMP

The Social Compromise Behind the Scheme

Quebec’s employment injury compensation scheme rests on a trade, the social compromise. Section 25 of the LATMP states it in one line: “The rights conferred by this Act are granted irrespective of any liability.” The worker is compensated without regard to fault, without having to prove anything and without the cost of a trial. In exchange, the worker gives up the civil remedy against the employer.

What comes back in return is real. Section 44 of the LATMP opens the right to the income replacement indemnity (IRR) for a worker who becomes unable to hold their employment because of an employment injury, and the CNESST calculates that indemnity at 90% of net income. The maximum yearly insurable earnings stand at $103,000 as of 1 January 2026: the portion of your income above that ceiling is not compensated, which weighs heavily whenever a civil action against a third party remains available.

How Far the Employer’s Immunity Reaches

The immunity in section 438 targets a civil liability action brought “by reason of his injury”. It is not limited to bodily harm: as long as the claim flows from the employment injury, it falls behind the barrier, including a claim for punitive damages.

Section 439 extends the rule to death: where a worker dies because of an employment injury, the beneficiary cannot sue that worker’s employer in civil liability by reason of the death. Section 440 grants the same immunity to people who are not legally the employer, for instance the person with whom a student does an unpaid internship or with whom an apprentice performs work.

The Immunity Also Covers Co-Workers and Mandataries

This is the least known part. Section 442 of the LATMP provides that a beneficiary may not bring a civil liability action, by reason of an employment injury, against a worker or a mandatary of an employer subject to the Act for a fault committed in the performance of their duties. The co-worker who rigged the load badly, the foreman who gave the wrong instruction: the colleague is covered.

The Act carves out a single named exception: the health professional responsible for an injury contemplated in section 31, meaning the injury or disease that arises out of or in the course of care received for an employment injury, the omission of such care, or an activity prescribed in a rehabilitation plan.

Who Can Still Be Sued in Civil Court

The Liable Third Party, the Most Frequent Opening

The immunity is named and limited: the employer, employers subject to the Act, their workers and their mandataries. Anyone who fits none of those categories is protected by nothing. The manufacturer of the machine whose safety device failed, the driver who struck you during a delivery, the owner of the premises: these are third parties, and the civil remedy against them survives your compensation by the CNESST.

That action is argued under the general law, before the Court of Québec or the Superior Court: proof of fault, of injury and of the causal link, and the three-year prescription period in article 2925 of the Civil Code of Québec. It can cover heads of damage the LATMP does not compensate at all.

Another Employer Subject to the Act, in Cases of a Criminal Offence

Section 441 lists four situations where a beneficiary may sue, in civil court, an employer subject to the Act other than their own:

• where that employer has committed a fault constituting an offence or a criminal act within the meaning of the Criminal Code;
• to recover the excess of the loss sustained over the benefit;
• where that employer is responsible for an employment injury contemplated in section 31;
• or where that employer is personally liable for the payment of the benefits.

The deadline here is short and unusual. Notwithstanding the prescription rules of the Civil Code of Québec, an action based on the criminal fault in the first paragraph may only be brought within six months of the admission of guilt or of the final judgment of conviction.

The Option and Subrogation, the Two Procedural Traps

When a civil remedy is open, the Act forces you to choose. Section 443 provides that a beneficiary entitled to bring a civil liability action must make an option and notify the CNESST of it, as a rule within six months of the industrial accident, and within two years for an employment injury resulting from sexual violence. Silence has consequences for your benefits.

Choosing the Act does not wipe out every civil remedy. Section 445 allows a beneficiary who claims a benefit to recover from the person responsible the excess of the loss sustained over that benefit, and section 444 protects the reverse by giving a right to a benefit for the difference to a worker whose civil action yields less than the benefit provided by the Act.

Then comes subrogation. Section 446 provides that the beneficiary’s claim to the CNESST subrogates the CNESST by operation of law in the beneficiary’s rights against the person responsible for the employment injury, up to the amount of the benefits paid and of the capital representing the benefits payable. The CNESST therefore recovers its share from the third party, and a settlement reached without it cannot be set up against it unless it ratifies the settlement.

When Your Claim Is Not an Employment Injury

The whole of the employer’s immunity rests on a characterization. An employment injury is an injury or a disease arising out of or in the course of an industrial accident, or an occupational disease. A claim that does not attach to one escapes section 438 entirely: unpaid wages, hours never paid out, a term of the employment contract that was breached, harm unrelated to your health. Those claims belong to labour law and to the general law, not to the compensation scheme, and an employee can then sue their employer before a civil court. Every file therefore starts with the characterization.

The Remedies That Are Not Civil Lawsuits

The useful question is not “can I sue my employer” but rather: which remedy, before which tribunal, within which deadline. Most of these remedies are argued before the Administrative Labour Tribunal, not before a civil court.

Contesting a CNESST Decision: 30 Days, Then 60 Days

If the CNESST refuses your claim, ends your income replacement indemnity or denies a permanent impairment, the remedy is not an action against your employer. It is a contestation, in two stages.

First, the administrative review. Section 358 of the LATMP provides that a person who believes they have been wronged by a CNESST decision may, within 30 days of notification, apply for a review of that decision. Thirty days, not sixty: this is the single most widespread error in the content circulating online, and it costs people their files.

Then the Administrative Labour Tribunal. Since 6 April 2023, section 359 of the LATMP sets that deadline at 60 days from notification of the decision rendered following the review. The same section adds a safety valve: you may contest directly before the Tribunal if the CNESST has not disposed of your review application within 90 days of receiving it. Ten-day deadlines apply to certain matters, notably an inspector’s order and a temporary assignment.

Dismissal, Sanction or Reprisals: 30 Days

Section 32 of the LATMP prohibits an employer from dismissing, suspending or transferring a worker, from practising discrimination or taking reprisals against a worker, or from imposing any sanction on a worker because that worker has suffered an employment injury or has exercised a right conferred by the Act.

A worker who believes they have been subjected to such a measure may, at their option, use the grievance procedure in their collective agreement, through the union, or file a complaint with the CNESST. Section 253 then imposes a tight deadline: the complaint must be made in writing within 30 days of the worker becoming aware of the act, sanction or measure, with a copy to the employer.

Psychological Harassment: Two Years, With the CNESST

Workplace harassment follows a different statute and a different clock. The Act respecting labour standards (Loi sur les normes du travail, LNT) defines psychological harassment at section 81.18 as vexatious behaviour in the form of repeated and hostile or unwanted conduct, verbal comments, actions or gestures that affect the employee’s dignity or integrity and result in a harmful work environment. The definition expressly covers conduct of a sexual nature, and a single serious incident can be enough if it produces a lasting harmful effect. Our guide on how to prove psychological harassment at work explains how to document the facts.

The complaint is filed with the CNESST, and section 123.7 of the LNT allows two years from the last incidence of the conduct. That deadline was only 90 days before 12 June 2018, and a great deal of online content was never corrected.

How this interacts with the compensation scheme decides what you can actually obtain. Under section 123.16 of the LNT, the Tribunal’s orders on lost wages, moral damages and the indemnity for loss of employment do not apply for a period during which the employee suffers an employment injury resulting from the psychological harassment; and where the Tribunal considers it likely that the harassment caused such an injury, it reserves its decision on those heads. No double compensation for the same period: the LATMP takes over, often in the form of a psychological injury accepted by the CNESST.

Discrimination and Fundamental Rights: The Charter and the CDPDJ

The Charter of human rights and freedoms guarantees, at section 10, the right to equality without distinction based notably on sex, pregnancy, age, religion, ethnic origin or a handicap, and at section 46 the right of every worker to fair and reasonable conditions of employment that have proper regard for their health and safety. Section 49 gives the victim of an unlawful interference the right to obtain the cessation of that interference and compensation for the harm suffered, and allows punitive damages where the interference is unlawful and intentional.

Anyone who believes they are the victim of a violation falling within the investigative jurisdiction of the Commission des droits de la personne et des droits de la jeunesse (CDPDJ), Quebec’s human rights and youth rights commission, may file a written complaint. The Commission may refuse or cease to act where the complaint is filed more than two years after the last relevant fact.

TAT, TAQ or Civil Court: Never Confuse the Three

Three tribunals, three schemes, and a confusion that costs people their remedies.

The Administrative Labour Tribunal (TAT) hears contestations in employment injury matters, complaints under section 32 of the LATMP and psychological harassment complaints under the Act respecting labour standards. It is the forum of the injured worker, from conciliation through to the hearing.

The Administrative Tribunal of Québec (Tribunal administratif du Québec, TAQ) hears challenges to decisions of the Société de l’assurance automobile du Québec (SAAQ) and of the crime victims compensation body (Indemnisation des victimes d’actes criminels, IVAC), with a 60-day deadline specific to those schemes. A road accident that happens during working hours can put both regimes in play, which is why we handle road traffic accidents and the SAAQ and compensation for victims of crime alongside CNESST files.

The courts of general jurisdiction, the Court of Québec or the Superior Court depending on the amount in dispute, hear the civil action against a third party or against a person the LATMP immunity does not protect.

Which Remedy, Before Whom, Within What Deadline

CNESST Scheme or Civil Lawsuit: What Each One Gives

The CNESST compensation scheme wins on certainty: no fault to prove, no costs to advance, an income replacement indemnity at 90% of net income, medical care, rehabilitation, and an indemnity for permanent impairment. It loses on the ceiling of the maximum insurable earnings and on the heads of harm the Act simply does not provide for. The civil action wins on the breadth of recoverable damages and loses on everything else: fault, harm and causation to prove, costs and delays to absorb, and the worker’s own share of liability reducing the award.

The two routes combine far more often than they conflict: the CNESST claim secures the income during recovery, and the civil action against the third party goes after the excess. That still requires the option to have been made within the deadline.

Frequently Asked Questions

My Employer Was Negligent, Does That Change Anything?

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Not for suing your employer in civil court. Section 438 provides no exception based on the seriousness of your own employer’s fault, and the criminal offence exception in section 441 targets an employer subject to the Act other than yours. Negligence remains relevant to prevention, on the penal side of occupational health and safety, and in proving your claim to the CNESST.

Can I Sue the Co-Worker Who Caused the Industrial Accident?

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As a rule, no: section 442 of the LATMP protects the co-worker for a fault committed in the performance of their duties. The real question is whether the act was connected to those duties, and that is an analysis of the facts.

What If the Accident Happened on the Road During Work?

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Two compensation schemes can apply, the CNESST and the SAAQ, and they share neither the same deadlines nor the same tribunal: a CNESST decision is contested before the Administrative Labour Tribunal, a SAAQ decision before the Administrative Tribunal of Québec. Have the file characterized before you file anything.

I Missed the Deadline, Is It Over?

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Not necessarily: the Act allows you to ask for an extension of a deadline where a reasonable ground is shown, but the burden of proof is yours. A missed deadline has to be argued, it does not repair itself.

How Long Do I Have to Claim From the CNESST?

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Six months, extended to two years for an employment injury or occupational disease resulting from sexual violence. The claim deadline and the contestation deadline are two separate clocks, and they are constantly confused.

General Information, Not Legal Advice

Have Your Remedy Assessed Before the Deadline Runs Against You

We represent workers before the CNESST and the Administrative Labour Tribunal: refused claims, terminated indemnities, permanent impairment, occupational disease, psychological injury, dismissal and reprisals. That is the core of our practice in CNESST claims and work-related accidents, backed by our in-house occupational health and safety experts. Our firm offers you a choice: representation by an expert lawyer of the Quebec Bar (Barreau du Québec), or by an administrative remedies expert at a lower cost. Free consultation, a reply in under 24 hours, home visits where needed, and you can meet our team before you decide. The first step is never to pick a tribunal: it is to characterize your employment injury and to identify the deadline that is already running.