A CNESST decision challenge often begins when a worker receives a refusal, insufficient compensation, a medical decision that creates concerns, or a return-to-work step that feels inappropriate.
CNESST challenge
CNESST decision challenge – Protecting your rights after a workplace accident
We support workers in Montreal and across Quebec who need to challenge a CNESST decision after a workplace accident, compensation refusal, disability issue, or return-to-work disagreement.
Introduction
Practical support for challenging a CNESST decision.
Our support helps make the file clearer, organize the facts, and prepare a structured response within the applicable timelines.
Understanding the process
What is a CNESST decision challenge?
A CNESST decision challenge is a process used to ask for a review of a decision made in a workplace accident file.
Depending on the situation, the challenge may concern recognition of the accident, compensation, a medical conclusion, or a return-to-work issue.
Official CNESST guidance generally provides 30 days to request an administrative review after receiving the decision.
The steps
Steps to challenge a CNESST decision
Request an administrative review
Ask the CNESST to review the file and the decision that was issued.
File analysis
A reviewer examines whether the decision complies with the applicable legal and administrative framework.
New decision
A new decision is issued after the file and the observations have been reviewed.
Possible TAT recourse
If the outcome remains unfavourable, the matter may move to the Tribunal administratif du travail within the applicable deadline.
Official sources generally indicate 30 days for administrative review and, in most cases, 60 days to contest before the TAT after the review decision.
Deadlines
Important deadlines to keep in mind
30 days for an administrative review
CNESST guidance generally states that the review request must be filed within 30 days of receiving the decision.
60 days for most TAT challenges
For most contestations, the TAT indicates a 60-day deadline after receiving the decision.
Respecting deadlines protects your recourses
Acting quickly is essential to preserve your rights and keep the challenge moving forward.
Our services
How we support a CNESST challenge
Full file review
We help review the file, the decision, and the elements that need clarification.
Decision analysis
We identify the main issues in the CNESST decision and the points that may support a structured challenge.
Challenge preparation
We help prepare the file, the arguments, and the supporting elements needed for the next step.
Document organization
We help organize reports, administrative exchanges, and other useful documents.
TAT support preparation
When the file may move toward the TAT, we help structure the matter more clearly.
End-to-end follow-up
We support the file over time so timelines, documents, and decisions remain easier to manage.
Why choose us
Professional support for Montreal and across Quebec.
Experience with CNESST files
Our support is grounded in a structured understanding of CNESST files, refusals, compensation issues, and administrative challenges.
Clear understanding of procedures
We help clarify steps, timelines, and the practical implications of each decision.
Personalized support
Each file is approached methodically and adapted to the person’s situation.
Coverage across Quebec
We support files in Montreal, Laval, Repentigny, and across Quebec.
CNESST challenge FAQ
Common questions about challenging a CNESST decision.
Yes. Depending on the situation, a CNESST decision can generally be challenged within the applicable timelines.
Official references
Useful official sources
Contact
Do you need help challenging a CNESST decision?
Contact Groupe BY – Conseils et Solutions Inc. today for professional support.