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Traumatic brain injury claims: How SIRA assesses injuries in NSW CTP cases

This article explains how SIRA assesses traumatic brain injury claims under NSW CTP laws, including the evidence required, time limits, and options for dispute resolution. It highlights the distinction between threshold injuries and more severe cases, and advises claimants to seek legal guidance when needed.

Current as at 19 June 2026

How SIRA evaluates traumatic brain injury claims under NSW CTP laws

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).

Traumatic brain injury (TBI) claims under New South Wales' Compulsory Third Party (CTP) scheme are assessed using the guidelines set by the State Insurance Regulatory Authority (SIRA). SIRA provides a framework to determine whether a TBI qualifies for compensation, the types of benefits available, and how injuries are classified. This article explains how SIRA applies its rules to TBI claims, the evidence required, and practical steps for claimants.

Key legal principles behind SIRA's assessment

Under the Motor Accident Injuries Act 2017, CTP insurers must assess claims based on the severity of the injury. SIRA's guidelines define two main categories: threshold injuries and more serious injuries. A TBI typically falls into the latter category unless it meets the specific criteria for a threshold injury.

SIRA evaluates whether a TBI meets the spinal nerve-root qualification. For example, a brain injury causing neurological signs like memory loss, speech difficulties, or coordination problems may qualify as a threshold injury. However, injuries requiring specific clinical signs, such as radiculopathy (nerve-related pain), must be confirmed by a medical practitioner.

If a TBI is classified as a threshold injury, claimants may be eligible for weekly income payments and treatment benefits. However, benefits are generally limited to 52 weeks unless the injury results in long-term or permanent impairment. More severe injuries may qualify for ongoing compensation, including lump sum damages for loss of income, care needs, or quality of life impacts.

Practical steps and evidence for TBI claims

To support a TBI claim, claimants must provide:

  • Medical records confirming the injury, including imaging (e.g., MRI, CT scans) and clinical notes.
  • Accident details such as police reports, witness statements, and photographs of the scene.
  • Evidence of impact like medical bills, lost wages, and statements from healthcare providers.
  • A rehabilitation plan if long-term care or therapy is required.

SIRA requires claimants to submit a Medical Certificate of Injury (MCI) within 28 days of the accident. This document must be signed by a registered medical practitioner and detail the nature of the injury, its impact on daily life, and any treatment needed.

Time limits and dispute resolution

CTP claims must be submitted within five years of the accident, though this period may be shorter if the claimant has died or the insurer has issued a final notice. Delays can jeopardize eligibility for certain benefits.

If a claimant disputes SIRA's assessment, they may request a review by the Motor Accident Claims Tribunal. This process involves submitting additional evidence and may include a medical expert's opinion to challenge the initial classification of the injury.

When to seek legal advice

SIRA's guidelines are complex, and claimants may struggle to navigate the process alone. Legal advice is recommended if:

  • The injury's severity is unclear or contested.
  • The claimant faces disputes over benefits or treatment.
  • The accident involved multiple parties or unclear fault.

A solicitor can help ensure all evidence is properly submitted, deadlines are met, and the claimant's rights under the CTP scheme are protected.

Example: How SIRA assesses a TBI claim

Consider a cyclist who suffered a head injury after a collision. Medical records show cognitive impairments, memory loss, and difficulty concentrating. SIRA would assess whether these symptoms meet the threshold injury criteria. If the injury is classified as a threshold injury, the claimant may receive weekly payments for 52 weeks. However, if the injury results in long-term cognitive decline, the claimant may qualify for ongoing compensation.

Next steps for claimants

Understanding how SIRA evaluates TBI claims is essential for securing fair compensation. While the CTP scheme provides a framework, the outcome depends on the specific facts of each case. For personalized guidance, claimants should contact a legal professional.

Every claim depends on its own facts. To request contact about your circumstances, complete the quick, no obligation enquiry form.

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