Work-Related Mental Stress Injury

What is a work-related mental stress injury?

A work-related mental stress injury happens when job-related stressors or traumatic events at work lead to a diagnosed psychological injury or illness, such as an anxiety, depressive, or trauma-related disorder. This can result from a single incident (for example, a serious accident, assault, or critical incident) or from ongoing exposure to significant workplace stressors over time, like chronic harassment, bullying, or repeated traumatic events. In Ontario, these conditions may be covered by WSIB when there is a clear link between the workplace stressor and the mental health diagnosis, as confirmed by a regulated health professional using DSM criteria.

These injuries can affect how a person thinks, feels, and functions day to day, often leading to difficulties with concentration, sleep, emotional regulation, and returning to or staying at work. Many workers also experience changes in relationships, loss of confidence, and fears about safety or performance at work, especially after traumatic events or prolonged stress. WSIB’s mental health program of care is designed to provide timely assessment and evidence-based treatment to help injured workers recover and return to meaningful activity as safely and sustainably as possible.

Importantly, a work-related mental stress injury is not a sign of personal weakness. It reflects the real impact of excessive, abnormal, or traumatic workplace stress on a person’s mental health, and WSIB recognizes that these injuries deserve structured, supportive care. With appropriate treatment, many people see meaningful improvements in symptoms, functioning, and quality of life at work and at home.

Common claims for WSIB mental health program of care

• Chronic mental stress resulting from substantial, ongoing workplace stressors such as harassment, bullying, or excessive workload that go beyond the normal pressures of the job.

• Traumatic mental stress related to clearly identifiable, sudden, and traumatic workplace events (for example, serious accidents, witnessing injury or death, assaults, or threats).

• First responder post‑traumatic stress disorder (PTSD) for workers in roles such as paramedics, firefighters, police, or corrections, who are repeatedly exposed to traumatic incidents.

• Psychological response secondary to physical injury, where a workplace injury or illness leads to conditions such as depression, anxiety, adjustment disorder, or substance use concerns.

• Other work‑related psychological conditions that meet WSIB criteria, including acute stress disorder, adjustment disorders, or other diagnosed anxiety or depressive disorders caused predominantly by work factors.

Common mood and related disorders in this service

• Depressive disorders (such as major depressive disorder or persistent depressive disorder)
• Anxiety disorders (such as generalized anxiety disorder, panic disorder, or specific phobias)
• Post‑traumatic stress disorder (PTSD) and acute stress disorder
• Adjustment disorders
• Substance use and related conditions

Most common treatment modalities

• Psychological assessment and formulation
• Cognitive Behavioural Therapy (CBT)
• Trauma‑focused therapies
• Dialectical Behaviour Therapy (DBT)–informed and skills‑based approaches
• Acceptance and Commitment Therapy (ACT) and mindfulness‑based approaches
• Functional recovery and return‑to‑work–focused interventions

Suicide Helpline Information

Recommended Practitioner(s)

• Farhat Shabbir RSW, MSW | fcounsellor4@gmail.com | Book an appointment