Legal Advice

The 10% Impairment Threshold in NSW CTP Claims: Common Questions for Injured Claimants

In New South Wales, a 10% whole person impairment threshold determines eligibility for damages in CTP claims. This article explains how the threshold is assessed, what happens if it is disputed, and how it affects access to treatment, care and income benefits. It outlines practical steps and when to seek advice, based on the Motor Accident Injuries Act 2017 and SIRA guidelines.

Current as at 19 June 2026

What is the 10% impairment threshold and how does it affect my claim?

In New South Wales, the 10% whole person impairment (WPI) threshold is a legal requirement that must be met before a claimant can seek damages for non-economic loss, such as pain and suffering, in a motor accident compensation claim. This threshold applies under the Motor Accident Injuries Act 2017 (MAIA), which governs all CTP claims in NSW. If your injury results in a WPI of 10% or more, you may be eligible to claim damages for non-economic loss, in addition to benefits for treatment, care and income loss. If your WPI is less than 10%, you are generally limited to receiving statutory benefits, such as treatment and care support and weekly income payments, but cannot claim damages for pain and suffering.

The threshold is not a measure of how painful your injury is, nor does it relate to your ability to return to work. It is a medical and legal assessment of the permanent impact of your injury on your body’s function. The assessment is conducted by a qualified medical practitioner, and the result is used to determine your eligibility for damages under the CTP scheme.

How is whole person impairment assessed and what determines if I meet the threshold?

Whole person impairment is assessed by a medical practitioner who is qualified under the Motor Accident Injuries Act 2017 to perform impairment assessments. The assessment is based on the Motor Accident Injuries (Impairment) Guidelines, which are issued by the NSW Government and administered by the State Insurance Regulatory Authority (SIRA).

The assessment considers the nature and severity of your injury, including any lasting physical or functional limitations. For example, if you have sustained a spinal injury that results in chronic back pain and reduced mobility, the medical practitioner will assess how much your body function is permanently reduced compared to a person with no injury. This is expressed as a percentage of whole person impairment.

The assessment process includes reviewing your medical records, imaging results (such as MRI or CT scans), and clinical findings from physical examinations. The medical practitioner must follow the guidelines to ensure consistency and fairness. An injury to a spinal nerve root that causes neurological signs, such as muscle weakness or altered sensation, may be considered a threshold injury even if it does not meet the criteria for radiculopathy as defined in the guidelines.

What happens if my claim is disputed over the threshold?

If the insurer or the CTP insurer disputes your WPI assessment, they may request a second opinion or a review by an independent medical assessor. You have the right to request a review of the assessment if you believe it is inaccurate or incomplete.

The dispute may involve a disagreement over the medical evidence, the interpretation of the guidelines, or the assessment of functional impact. In such cases, the insurer may issue a formal notice of dispute, which outlines their reasons for challenging the assessment. You may also seek an independent assessment through a qualified medical practitioner approved under the MAIA.

If the dispute cannot be resolved, you may need to apply to the NSW Civil and Administrative Tribunal (NCAT) for a determination. The tribunal will consider all medical evidence and may order a new assessment.

Can I still claim compensation if I don’t meet the 10% threshold?

Yes. If your WPI is less than 10%, you are still entitled to claim statutory benefits under the CTP scheme. These benefits include:

  • Treatment and care for your injury, including rehabilitation and therapy
  • Weekly income payments if you are unable to work due to the injury
  • A lump sum for out-of-pocket expenses related to the accident, such as transport and home modifications

These benefits are not limited to a 52-week period if your injury is not a threshold injury. However, if your only injuries are threshold injuries, weekly benefits and treatment and care benefits are generally limited after 52 weeks, as provided under the MAIA.

Even if you do not meet the 10% threshold, you may still be eligible for a damages claim if you can prove that your injury was caused by a motor vehicle accident and that you have suffered a permanent and significant impact on your life. However, this would require a separate legal assessment and is not automatic.

How does the threshold affect long-term treatment funding?

The 10% threshold does not determine whether you will receive long-term treatment and care funding. Treatment and care benefits are available under the CTP scheme regardless of whether you meet the threshold, as long as your injury is related to the motor accident.

If your injury is not a threshold injury, treatment and care benefits may continue beyond 52 weeks, depending on your ongoing medical needs. If your injury is a threshold injury, treatment and care benefits are generally limited to 52 weeks unless a review determines that your condition has not stabilised or that additional treatment is necessary.

For example, if you have a soft tissue injury to your neck that causes ongoing pain and requires physiotherapy, you may be entitled to treatment and care benefits for up to 52 weeks. If your condition worsens or stabilises later, a review may be initiated to assess whether further treatment is required.

What practical steps should I take if I have questions about the threshold?

If you have been injured in a motor accident in Greater Sydney and are concerned about the 10% threshold, you should:

  • Seek medical treatment as soon as possible and keep all records, including appointment notes, test results and treatment plans
  • Request a copy of your WPI assessment from your medical practitioner
  • Contact the CTP insurer to confirm the status of your claim and any dispute over the assessment
  • Preserve all correspondence, including emails and letters, from the insurer and medical providers
  • Consider obtaining an independent medical assessment if you believe the assessment is inaccurate

You may also contact SIRA for information about the assessment process and the guidelines. It is important to act promptly, as delays in notifying the insurer or providing medical evidence may affect your entitlement to benefits.

When should I seek independent advice?

The 10% threshold is a complex legal and medical issue that can significantly affect your compensation outcome. While general information can help you understand the process, it cannot determine whether you are entitled to damages or how your claim will be assessed.

If you have questions about your WPI, the assessment process, or the potential for a dispute, it is advisable to seek independent legal advice. A solicitor experienced in CTP claims can help you understand your rights, review your medical evidence, and assist in resolving disputes with the insurer.

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

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