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Permanent Impairment Threshold in NSW CTP Claims: What Evidence to Keep

Under NSW CTP laws, a permanent impairment of at least 10% whole person impairment (WPI) is required for certain benefits. This article explains the evidence needed to prove this threshold, including medical reports and impairment assessments, and outlines steps to ensure proper documentation. Inadequate records may lead to claim rejection, so seeking legal advice is recommended when disputes arise.

Current as at 19 June 2026

Permanent Impairment Threshold and Evidence Requirements in NSW CTP Claims

Under New South Wales law, a claimant must prove a permanent impairment of at least 10% whole person impairment (WPI) to qualify for certain benefits under the Compulsory Third Party (CTP) scheme. This threshold determines whether a claimant is eligible for ongoing compensation, including weekly payments and treatment benefits. The evidence required to establish this impairment must meet strict legal standards set by the State Insurance Regulatory Authority (SIRA) and the Motor Accident Injuries Act 2017.

Legal Framework for Permanent Impairment Claims

The 10% WPI threshold is defined in the Motor Accident Guidelines, which outline the clinical criteria for assessing impairment. A permanent impairment is one that is expected to last for at least 12 months and is not likely to improve significantly. To prove this, claimants must provide:

  • A detailed medical report from a registered medical practitioner
  • A whole person impairment assessment by a qualified assessor
  • Evidence of the injury's impact on daily activities, work capacity, or quality of life

SIRA's guidelines emphasize that the impairment must be 'permanent' and 'not likely to improve significantly.' This means the evidence must demonstrate that the injury has reached a stable state and will not resolve within a reasonable timeframe.

Key Evidence to Keep for Permanent Impairment Claims

Claimants must retain all documentation that supports the 10% WPI threshold. This includes:

  • Medical records detailing the injury, diagnosis, and treatment
  • Copies of all medical reports, including imaging results and specialist opinions
  • The whole person impairment assessment report
  • Evidence of how the injury affects the claimant's ability to work or perform daily tasks
  • Any correspondence with insurers or SIRA regarding the claim

It is crucial to preserve these records in a secure location. Incomplete or poorly documented evidence may result in the claim being denied or delayed.

Practical Steps for Documenting Impairment Evidence

To ensure evidence meets legal standards, claimants should:

  • Obtain a whole person impairment assessment from an accredited assessor
  • Request a detailed medical report that specifies the percentage of impairment
  • Keep records of all treatment and recovery progress
  • Document any changes in the injury's impact over time

Claimants should also ensure that all evidence is dated and signed by the relevant professionals. This helps establish the timeline of the injury and its progression.

Consequences of Inadequate Documentation

If a claimant fails to provide sufficient evidence to meet the 10% WPI threshold, their claim may be rejected. Inadequate documentation can also lead to delays in processing the claim, as insurers may request additional information. It is essential to understand that the burden of proof lies with the claimant to demonstrate that the impairment meets the legal threshold.

When to Seek Legal Advice

If a claimant is unsure whether their evidence meets the required standards or if they face disputes over the assessment of their impairment, they should seek legal advice. A solicitor can help ensure that all documentation is complete and that the claim is submitted in accordance with NSW CTP rules.

Final Steps for Claimants

To protect their claim, injured persons should take the following steps:

  1. Obtain a whole person impairment assessment from an accredited assessor
  2. Ensure all medical reports clearly state the percentage of impairment
  3. Keep all records related to the injury and its impact
  4. Submit the claim promptly to avoid missing time limits

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

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