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MAI Act transitional claims in NSW: How insurers assess your case

This article explains how insurers assess transitional claims under the MAI Act in NSW, focusing on pre-2017 rules. It covers medical evidence requirements, fault assessments, time limits, and steps to challenge insurer decisions. Claimants should seek legal advice if their case involves complex issues like workers’ compensation overlap or interstate accidents.

Current as at 17 October 2026

Understanding MAI Act transitional claims in NSW

The Motor Accident Injuries Act 2017 (MAI Act) replaced the old Motor Accidents Compensation Act 1999 (MACA) on 1 December 2017. Transitional claims are those where the accident occurred before this date, and insurers must assess them under the MACA rules but within the MAI Act framework. This means claimants may face unique challenges in proving their case, as insurers apply pre-2017 rules to post-2017 legislation.

Key legal principles of transitional claims

Under the MAI Act, transitional claims are governed by the MACA’s rules for claims arising from accidents before 1 December 2017. This includes:

  • Threshold injuries: Injuries meeting the MACA’s soft tissue injury definition, such as whiplash or muscle strain.
  • Statutory benefits: Weekly income payments and treatment benefits for 52 weeks, after which benefits stop unless the injury exceeds threshold level.
  • Fault rules: Claimants must prove the other party was at fault, and contributory fault may reduce compensation.

Insurers must apply these rules strictly, even though the MAI Act now governs claims. This creates a complex legal mix where pre-2017 rules apply to post-2017 claims.

How insurers evaluate transitional claims

Insurers assess transitional claims using the MACA’s guidelines, which include:

1. Medical evidence

Insurers require detailed medical records to confirm the injury meets the MACA’s threshold. For example, a spinal nerve-root injury producing neurological signs may qualify as a threshold injury under the Motor Accident Guidelines. However, radiculopathy (nerve root irritation) must meet specific clinical criteria.

2. Fault and contributory fault

Claimants must prove the other party was at fault. If the claimant contributed to the accident (e.g., speeding), the insurer may reduce compensation. Insurers often scrutinise fault assessments in transitional claims.

3. Time limits

Claims must be submitted within 52 weeks of the accident. If the claimant misses this deadline, they may lose statutory benefits, though they can still pursue a common law damages claim.

4. SIRA guidelines vs insurer practices

SIRA (State Insurance Regulatory Authority) provides guidelines for assessing claims, but insurers may interpret these differently. For example, SIRA may allow for a longer recovery period, while insurers might apply stricter time limits.

Practical steps for claimants

To challenge insurer decisions, claimants should:

1. Gather evidence

  • Medical records: Show the injury meets MACA thresholds.
  • Accident reports: Document fault and circumstances.
  • Witness statements: Support claims of negligence.
  • Income records: Prove lost wages for weekly benefits.

2. Challenge insurer decisions

If an insurer denies a claim, the claimant can:

  • Request a review: Submit additional evidence to the insurer.
  • Seek mediation: Use SIRA’s dispute resolution process.
  • File a complaint: Lodge a formal complaint with SIRA.

3. Consider legal advice

Complex cases, such as those involving lifetime care or workers’ compensation overlap, may require a solicitor. Legal advice can help claimants understand their rights under both the MACA and MAI Act.

Example: A transitional claim challenge

Consider a claimant who suffered a soft tissue injury in a 2020 accident. The insurer denied weekly benefits after 52 weeks, arguing the injury was a threshold injury. The claimant could challenge this by:

  • Proving the injury exceeds threshold level via medical evidence.
  • Showing the insurer applied incorrect MACA guidelines.
  • Filing a complaint with SIRA to review the decision.

When to seek independent advice

Transitional claims are complex, especially when they involve:

  • Interstate accidents: Different rules may apply.
  • Workers’ compensation overlap: Claims may be affected by workplace injury schemes.
  • Nominal Defendant matters: Cases where the at-fault driver is unknown.

Claimants should seek legal advice if the insurer denies a claim, disputes fault, or applies incorrect rules. A solicitor can help navigate the MAI Act’s transitional regime and ensure claimants receive fair treatment.

Next steps

Understanding how insurers assess transitional claims under the MAI Act is crucial for claimants. While the MAI Act provides a framework, insurers apply pre-2017 rules to post-2017 claims, creating a unique legal challenge. If you’re unsure whether your claim meets the criteria or how to challenge an insurer’s decision, complete the quick, no obligation enquiry form to request contact about your circumstances.

Prepared using automated research and drafting tools and checked through LegalAdvice editorial and source-validation controls. This page is general information, not personalised legal advice.

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