Ontario HR Compliance · CLC Part III (labour standards)
Group / Mass Termination (CLC Part III, Division IX, s.212)
Terminating 50 or more employees at one location within a 4-week window triggers a 16-week Ministerial notice and a joint planning committee, on top of — not instead of — each affected employee's individual notice and severance.
A group termination occurs when an employer terminates 50 or more employees at a single industrial establishment, either on the same date or spread across any 4-week period. Crossing that threshold triggers its own notice process, separate from the notice owed to each employee individually.
The employer must give at least 16 weeks’ written notice to the Head of Compliance and Enforcement at the Labour Program, with copies to the Minister of Employment and Social Development, the Canada Employment Insurance Commission, and any union representing the affected employees (or the employees themselves if there’s no union). Within two weeks of giving that notice, the employer must also establish a joint planning committee made up of employer and employee representatives.
This 16-week Ministerial notice does not replace what each affected employee is individually owed. The Alberta Court of King’s Bench confirmed this in Re Lynx Air (2025 ABKB 182): group-termination notice under s.212 does not itself create a pay-in-lieu entitlement — affected employees still receive their own individual termination notice and severance pay on top of it. See Individual Termination: Notice and Pay in Lieu and Severance Pay.
This mechanism is structurally different from Ontario’s mass-termination rules, which scale notice length to headcount. The federal regime instead uses one flat 16-week notice period regardless of exactly how far past 50 the termination count runs, plus the planning-committee requirement that Ontario’s rules don’t have.
This is general information, not legal advice; confirm current requirements at the source before relying on them.
Source: Government of Canada — Termination of employment under federal labour standards ·
Also: Osler — Entitlements of employees impacted by group termination under the Canada Labour Code
Last reviewed .
Confidence: Verified
Related notes
- Individual Termination: Notice and Pay in Lieu (CLC Part III, s.230) — Since February 1, 2024, federally regulated employers terminating an employee without just cause owe graduated notice or pay in lieu of 2 to 8 weeks, on top of — not instead of — severance pay.
- Severance Pay (CLC Part III, s.235) — A federally regulated employee with 12 months' service who is terminated is owed severance pay — the greater of 2 days' wages per completed year or 5 days' wages — on top of termination notice, at any employer size.
- Federal vs. Ontario Jurisdiction: The Employment-Law "Instead Of" Rule — A federally regulated employer follows the Canada Labour Code and related federal statutes in place of Ontario employment law, not on top of it — the federal regime replaces the ESA, OHSA, Human Rights Code, AODA and Pay Equity Act rather than adding to them.