A threshold injury under the Motor Accident Injuries Act 2017 (NSW) includes a soft tissue injury and a psychological or psychiatric injury that is not a recognised psychiatric illness (adjustment disorder and acute stress disorder are the usual examples; s 1.6 and Motor Accident Guidelines Part 5).
Post-traumatic stress disorder (PTSD) following a serious motor vehicle accident may be recognised under the NSW Compulsory Third Party (CTP) insurance scheme, but insurers assess such claims under strict legal criteria. In Greater Sydney, as across NSW, the Motor Accident Injuries Act 2017 (MAIA) governs CTP claims, including psychological injuries like PTSD. Insurers do not automatically accept PTSD claims; they assess whether the injury arose from the accident, whether it is clinically significant, and whether it meets the legal threshold for compensation. The assessment process is not based on fault alone, but on whether the injury is a direct result of the accident and whether it causes a measurable impact on daily life. This article explains how insurers assess liability for PTSD claims in NSW, focusing on the legal framework, evidence requirements, and practical steps for claimants in Greater Sydney.
What legal framework applies to PTSD claims in NSW CTP claims?
The Motor Accident Injuries Act 2017 (MAIA) is the current legal framework for CTP claims in NSW, including those involving psychological injuries such as PTSD. Under MAIA, a claimant may be entitled to treatment and care benefits, weekly income payments, and damages if they meet the legal criteria. PTSD is not automatically compensable. The injury must be clinically diagnosed and linked to the motor accident. Insurers assess whether the psychological injury is a result of the trauma experienced during the accident, not a pre-existing condition or a separate life event. The assessment is not based on who was at fault, but on whether the injury occurred in connection with the accident and whether it meets the statutory thresholds for benefits and damages.
How do insurers assess liability for PTSD claims?
Insurers assess liability for PTSD claims by examining whether the injury is a direct consequence of the motor accident and whether it meets the legal requirements under MAIA. The process involves several key steps:
- The claimant must provide a diagnosis from a qualified medical practitioner, such as a psychiatrist or clinical psychologist, confirming PTSD and linking it to the accident.
- The insurer will review the medical evidence, including treatment records, psychological assessments, and any reports from treating professionals.
- The insurer will assess whether the PTSD symptoms are consistent with the nature of the accident, including the severity of impact, exposure to life-threatening circumstances, or witnessing serious injury or death.
- The insurer will determine whether the injury is a threshold injury under MAIA. For PTSD to qualify as a threshold injury, it must result in a whole person impairment (WPI) of at least 10%, as assessed under the Motor Accident Guidelines.
If the PTSD is not a threshold injury, the claimant may still be entitled to treatment and care benefits and weekly income payments, but not damages. Insurers may also consider whether the claimant has a history of mental health issues, but this does not automatically disqualify the claim if the accident is shown to have triggered or significantly worsened the condition.
What evidence matters for PTSD claims in Greater Sydney?
The strength of a PTSD claim in Greater Sydney depends on the quality and consistency of evidence. Insurers rely on objective documentation to assess the validity and impact of the injury. Key evidence includes:
- A formal diagnosis of PTSD from a registered medical practitioner, supported by clinical notes and assessment tools such as the PTSD Checklist (PCL-5) or the Clinician-Administered PTSD Scale (CAPS).
- Treatment records showing ongoing psychological care, including therapy sessions, medication management, and progress notes.
- Statements from treating psychologists or psychiatrists detailing the onset of symptoms, their severity, and how they affect daily functioning, work capacity, and relationships.
- Witness statements, if available, describing the circumstances of the accident and any immediate behavioural changes in the claimant.
- Photographs, police reports, or medical records from the accident scene, which may help establish the traumatic nature of the event.
In Greater Sydney, where road networks are dense and traffic volumes high, insurers may scrutinise claims more closely, particularly where the accident involved minor contact or no physical injury. However, the legal standard remains the same: the injury must be a direct result of the accident and not attributable to a separate cause.
How does PTSD assessment differ from other injuries under NSW CTP law?
PTSD claims are assessed under the same legal framework as physical injuries, but with distinct considerations. Unlike physical injuries, psychological injuries are not always visible and require expert clinical evaluation. The Motor Accident Guidelines set out the criteria for assessing WPI in psychological conditions, including PTSD. A claimant must demonstrate that the PTSD has caused a permanent impairment, and that this impairment is not solely due to pre-existing factors.
A key distinction is that PTSD may not result in a physical injury, but it can still qualify as a threshold injury if it causes a WPI of 10% or more. If the only injuries are threshold injuries, weekly benefits and treatment and care benefits are generally limited to 52 weeks under MAIA section 4.4, unless the claimant qualifies for a lifetime care arrangement. This limitation does not apply to damages claims, which may still be pursued if the threshold is met and the claimant seeks compensation for pain and suffering, loss of enjoyment of life, and future care needs.
What practical steps should claimants take in Greater Sydney?
If you believe you have developed PTSD after a motor accident in Greater Sydney, take the following steps to support your claim:
- Seek medical attention immediately, even if symptoms are not severe. Early diagnosis strengthens your claim.
- Contact your CTP insurer as soon as possible to report the injury and begin the claims process.
- Keep all records related to the accident, treatment, and any impact on work or daily life.
- Do not delay seeking psychological treatment. Continuing care is essential for recovery and for demonstrating ongoing impact.
- Avoid making statements to insurers without first consulting a legal professional, especially if your claim is disputed.
When might a claim be disputed, and what can you do?
Insurers may dispute PTSD claims on grounds such as: the injury not being linked to the accident, the claimant having a pre-existing mental health condition, or the WPI not meeting the 10% threshold. If your claim is disputed, you may request a review from the insurer or apply to the NSW Civil and Administrative Tribunal (NCAT) for a determination. You may also seek an independent medical assessment to support your case.
A realistic example
A 38-year-old driver in Sydney’s Inner West was involved in a high-speed collision on the M4 motorway in 2025. Though not physically injured, the driver experienced severe anxiety, flashbacks, and sleep disturbances following the crash. A psychologist diagnosed PTSD and assessed a WPI of 12%. The insurer initially declined treatment and care benefits, arguing the injury was not a threshold injury. After a review and submission of detailed medical evidence, the insurer accepted the claim. The claimant received weekly payments and treatment benefits, and later pursued damages through a common law claim.
Every claim depends on its own facts. To request contact about your circumstances, complete the quick, no obligation enquiry form.