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How NSW CTP Insurers Evaluate Liability for Traumatic Brain Injury Claims

NSW CTP insurers assess traumatic brain injury claims by determining if the injury meets the legal threshold under the Motor Accident Injuries Act 2017. Claimants must provide medical evidence and accident details to support their case. Time limits and statutory benefits apply, and legal advice is recommended if an insurer disputes liability.

Current as at 20 August 2026

How NSW CTP Insurers Assess Liability for Traumatic Brain Injury Claims

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 injuries (TBIs) are among the most serious injuries covered under NSW Compulsory Third Party (CTP) insurance. Insurers assess liability by determining whether the injury meets the legal definition of a 'threshold injury' under the Motor Accident Injuries Act 2017 and whether the claimant satisfies the statutory criteria for compensation. This article explains how insurers evaluate TBI claims, referencing SIRA guidelines and practical steps for claimants in Ballina.

Key Factors in Liability Assessments

NSW CTP insurers consider several factors when assessing liability for TBI claims. First, they evaluate whether the injury qualifies as a 'threshold injury' under the Motor Accident Guidelines. This requires evidence of a spinal nerve-root injury producing neurological signs, such as memory loss, confusion, or speech difficulties, that persist beyond a short period. Insurers also assess whether the injury resulted from a motor vehicle accident covered by the CTP scheme.

Second, insurers determine if the claimant is eligible for statutory benefits. Under the Motor Accident Injuries Act 2017, weekly income payments and treatment benefits are available for injuries that meet the threshold criteria. However, if the injury is classified as a 'threshold injury' only, benefits are generally limited to 52 weeks after the accident, as specified in s 4.4 of the Act.

SIRA's Role in TBI Assessments

SIRA (State Insurance Regulatory Authority) provides authoritative guidance on assessing TBI claims. Their Motor Accident Guidelines outline the clinical criteria for threshold injuries, including the requirement for neurological signs that are not limited to radiculopathy (nerve root irritation). Insurers in Ballina and other NSW locations rely on these guidelines to evaluate whether a TBI meets the legal definition of a threshold injury.

For example, a claimant who experienced a concussion following a car accident and later developed persistent memory loss may qualify for benefits if the injury meets the neurological criteria in the guidelines. However, if the injury is minor and resolves within a short time, it may not satisfy the threshold requirements.

Practical Steps for Claimants

To support a TBI claim, claimants should gather medical evidence, including diagnostic reports, treatment records, and statements from healthcare professionals. Insurers also require details of the accident, such as police reports, witness statements, and photographs of the scene. Keeping records of income loss and medical expenses is essential to demonstrate the impact of the injury.

Claimants should also be aware of time limits. Under NSW law, claims must typically be made within 52 weeks of the accident, although exceptions exist for certain circumstances. If an insurer disputes the claim, claimants may need to request a review or seek independent medical opinions to challenge the assessment.

When to Seek Legal Advice

Insurers may dispute liability by arguing that the injury does not meet the threshold criteria or that the claimant contributed to the accident (contributory fault). In such cases, claimants should seek legal advice to understand their options. A solicitor can help challenge an insurer's decision, negotiate a fair settlement, or prepare for a dispute resolution process.

Summary of Liability Assessment Process

  1. Insurers assess whether the TBI meets the legal definition of a threshold injury under the Motor Accident Guidelines.
  2. They evaluate the injury's connection to a covered motor vehicle accident.
  3. Statutory benefits are available for threshold injuries, but benefits are limited to 52 weeks.
  4. Claimants must provide medical evidence and accident details to support their case.
  5. Legal advice is recommended if an insurer disputes liability or refuses to pay.

Next Steps

CTP liability assessments for traumatic brain injuries depend on the specific facts of each case. To request contact about your circumstances, complete the quick, no obligation enquiry form.

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