Called back to work and forced overtime: are you legally required to accept?

It's 9 p.m. on a Friday. Your phone rings — it's your supervisor. Someone called in sick for the night shift and they need you in within the hour. You have kids at home, family plans, or you're simply exhausted. The question hits you immediately: are you legally required to say yes?

Many unionized workers say yes out of fear — fear of discipline, of looking uncooperative, of being marked as a troublemaker. But the honest answer is more nuanced: it depends on what your collective agreement says, what Quebec's labour standards law provides, and what arbitration principles have established over decades of labour relations. This article breaks it all down in plain language.

What the law says: the Act Respecting Labour Standards as a minimum floor

In Quebec, the Act Respecting Labour Standards (ARLS) — commonly called by its French acronym, LNT — sets minimum protections for all workers, whether unionized or not. When it comes to overtime and callbacks, a few provisions are essential.

The right to refuse for family reasons (s. 122 ARLS)

Section 122 of the ARLS prohibits employers from taking reprisals — disciplinary measures, dismissal, layoff, demotion, and similar actions — against workers who refuse overtime to fulfil their family or parental obligations. Classic examples include caring for a sick child, an elderly parent, or another dependent family member.

This right is not absolute. The law requires that the refusal be reasonable in the circumstances. If you invoke this protection, document the situation immediately: who needed you, why, and at what time. Keep a written record.

The standard work week

The ARLS establishes a standard work week of 40 hours in most sectors. Hours beyond that threshold are overtime. However, the law does not say employers cannot require overtime — it says those hours must be paid at a premium rate (generally 1.5 times the regular rate). The actual obligation to work those hours flows from your employment contract or, for unionized workers, from your collective agreement.

Protection against unreasonable compulsion

A general principle firmly embedded in Quebec labour law — and confirmed repeatedly by arbitrators — is that an employer cannot impose overtime in an unreasonable or abusive manner. This principle applies even when no explicit clause in the collective agreement addresses it directly. It is sometimes described as the prohibition against "excessive constraint" on workers' personal lives.

Your collective agreement: the primary source of your rights

For unionized workers, the collective agreement — the contract negotiated between the union and the employer — governs overtime and callback rules before anything else. The ARLS applies as a floor below which the parties cannot go, but the collective agreement can and often does provide stronger protections.

Here are the types of clauses commonly found in collective agreements:

Concrete example: Imagine your collective agreement requires that overtime be offered first to department workers in reverse order of seniority, and that only once every person on the list has been offered the hours can the employer assign them to someone. If your supervisor skips the list entirely and calls you directly, that callback does not comply with the agreement — and you may have the right to refuse without discipline, or at minimum to grieve the assignment afterward.

Callback rules: what makes them different

A callback specifically refers to being contacted after your regular shift has ended to return to work or to stay beyond your scheduled hours without prior notice. This is distinct from pre-scheduled overtime that appears on the work schedule days in advance.

What arbitrators have established

Grievance arbitrators in Quebec — neutral third parties who resolve disputes about the application of collective agreements — have developed several key principles around callbacks over the years:

• Real urgency vs. manufactured urgency. Employers have the right to call workers back in cases of genuine operational need: a major equipment breakdown, an unforeseeable absence, a safety situation. But when frequent callbacks result from chronic poor scheduling, arbitrators have recognized that workers can legitimately resist.
• The "obey now, grieve later" principle. Under Canadian and Quebec labour law, the general rule is: comply with the order first, then file a grievance. Workers are expected to follow management instructions even if they disagree with them — except when the order is illegal, poses a health or safety risk, or violates a statute of public order. Disagreeing with how the employer interprets the collective agreement is not, by itself, grounds for immediate refusal.
• The health and safety exception. If returning to work would expose you to a serious risk — for instance, if you are so fatigued that working would be genuinely dangerous — Quebec's Act Respecting Occupational Health and Safety may offer additional protection.

The notice requirement: an underused shield

If your collective agreement sets a notice period for callbacks — say, two hours before the shift starts — and your supervisor calls you 40 minutes before, you are entitled to raise the non-compliance. In many workplaces, a callback made without proper notice either does not bind the worker, or triggers a premium pay entitlement. Read your agreement carefully.

When is a refusal justified? Recognized criteria

Neither the law nor arbitration case law provides an exhaustive checklist, but here are the circumstances most commonly recognized as making a refusal legitimate or at least defensible:

1. The collective agreement explicitly permits it — the rotation list has been completed, the weekly maximum has been reached, or the required notice was not given.
2. Serious family or parental obligations (s. 122 ARLS — childcare, caregiver responsibilities).
3. Health or safety risk related to fatigue or a documented medical condition.
4. Absence of genuine operational need — the employer is not facing an emergency but is compensating for chronic poor planning.
5. Procedural non-compliance — the employer did not follow the steps set out in the collective agreement (wrong rotation order, no posting, etc.).

On the other hand, reasons that generally do not constitute a valid defence against discipline:

• "I just didn't feel like it."
• "I had personal plans that weren't urgent."
• "I think I already work enough hours."

These reasons are humanly understandable, but on their own they are unlikely to protect you before an arbitrator.

The grievance: your tool when the employer oversteps

A grievance is a formal complaint filed by the union (or sometimes directly by a worker, depending on the collective agreement) to challenge a decision or measure by the employer that violates the collective agreement or the law.

If you refuse a callback or overtime for what you believe are valid reasons and the employer disciplines you — a written warning, a suspension, even termination — you have the right to contest that discipline through the grievance process.

How the grievance process works

1. Report the situation to your union steward (the union's representative on the shop floor or in the workplace).
2. The union evaluates whether the collective agreement or the law was violated.
3. A grievance is filed within the time limits set by the collective agreement — these deadlines are strict, often ranging from 5 to 30 calendar days depending on the agreement.
4. If unresolved through internal steps, the grievance may go to arbitration: a neutral arbitrator hears both sides and issues a final, binding decision.

Critical reminder: Do not delay. Missing a grievance deadline typically means forfeiting the right to contest the discipline entirely. Contact your steward as soon as the issue arises.

What employers can and cannot do

Here is a summary of management rights and their limits:

What you should do if this happens to you

Here are concrete steps to follow if you are called back or asked to work overtime and believe you may have the right to refuse:

Before you refuse

• Read your collective agreement. Look for clauses on overtime, callbacks, rotation, and notice requirements. If you do not have a copy, ask your union.
• Call your union steward before responding if you have time — even a brief text can help.
• Honestly assess the situation: Is there a genuine emergency? Do you have a valid reason (family, health)?

If you decide to refuse

• Document everything: the time of the call, who called, the reason given by the employer, the reason for your refusal.
• Inform your steward immediately.
• Do not defend yourself alone if the employer moves to discipline — let the union handle it. That is exactly what union representation is for.

If you accept under protest

• You can work the hours and file a grievance afterward to challenge whether the callback was proper. This is the "obey now, grieve later" principle in action. Make sure your steward knows you accepted under protest.

Conclusion: knowing your rights is your first line of defence

Refusing a callback or overtime is not automatically a workplace offence. But it is not an unconditional right either. Your real protection lives in your collective agreement — and in your ability to read it, understand it, and invoke it at the right moment.

The ARLS provides a baseline: it prohibits reprisals for family-based refusals and guards against the most blatant abuses. Arbitration principles have refined those protections over decades of Quebec labour relations. But the strongest protection you have is the specific language your union negotiated for your workplace.

Wondering what your collective agreement actually says about callbacks and overtime? Ask the question directly on Konvention. Our tool reads your agreement and gives you answers based on what is actually negotiated in your workplace — not on generalizations that may or may not apply to your situation.