Motor Vehicle Accidents (AU) glossary
Motor vehicle accident claims in Australia are governed by state-based compulsory third party (CTP) insurance schemes. Each jurisdiction has a different balance between no-fault statutory benefits and common law damages rights. This glossary explains the terms practitioners need to navigate these schemes — from NSW's MAIA to Victoria's TAC to Queensland's MAIA.
This glossary covers 40 terms that personal injury and insurance lawyers encounter when advising on motor vehicle accident claims across Australian state CTP schemes. Each definition references the relevant scheme legislation.
Definitions
At-fault claim
A claim against the CTP insurer of the driver who caused the accident — required in some jurisdictions to access common law damages beyond no-fault benefits.
Blameless accident
An accident in NSW where no driver was at fault — the injured person can still access statutory benefits and, where seriously injured, common law damages.
Catastrophic injury
A severe injury (such as spinal cord, traumatic brain, or severe burns) entitling the claimant to lifetime care and support under the icare Lifetime Care scheme or equivalent.
Claim form
The prescribed form used to initiate a motor accident claim with the CTP insurer — triggering statutory timeframes for the insurer's response.
Common law damages
Damages for pain and suffering, economic loss, and care assessed by a court — available only if the claimant meets the scheme's threshold (e.g. greater than 10% WPI in NSW).
Contributory negligence
The injured person's failure to take reasonable care — reducing common law damages by the proportion of fault, with minimum reductions applying in some schemes.
CTP (Compulsory Third Party) insurance
The mandatory motor accident insurance attached to vehicle registration in each state — funding statutory benefits and common law claims.
CTP insurer
The insurance company providing CTP cover for a particular vehicle — responsible for paying statutory benefits and assessing common law claims.
Damages assessment
The process by which a court, commission, or assessor determines the quantum of common law damages — including general damages, economic loss, and care.
Dispute resolution
The process for resolving disagreements between the claimant and insurer — through internal review, the Personal Injury Commission (NSW), or equivalent bodies.
Earner benefits
Weekly income replacement benefits paid to injured persons who were earning income at the time of the accident — calculated as a percentage of pre-accident earnings.
Future economic loss
Damages for the reduction in earning capacity from the date of judgment into the future — calculated by reference to vocational and actuarial evidence.
General damages
Non-economic loss damages for pain, suffering, and loss of amenities of life — subject to a statutory cap calculated as a percentage of the most extreme case.
Green slip
The colloquial name for a CTP insurance policy in NSW — purchased by vehicle owners when registering or renewing registration.
Impairment dispute
A dispute about the claimant's degree of permanent impairment — determined by a medical assessor at the Personal Injury Commission (NSW) or equivalent body.
Internal review
The first stage of dispute resolution within the CTP insurer — reviewing a decision about liability, benefits, or treatment before escalation to an external body.
Lifetime Care
The NSW scheme providing lifetime treatment, rehabilitation, and attendant care for people catastrophically injured in motor accidents — administered by icare.
MAIA
The Motor Accident Injuries Act 2017 (NSW) — the current legislation governing motor accident claims in NSW, replacing the Motor Accidents Compensation Act 1999.
Medical assessment
An assessment by a medical assessor at the Personal Injury Commission to determine WPI, treatment disputes, or whether an injury is a minor injury.
Minor injury
A defined category of injury in NSW (soft tissue and minor psychological) that limits the claimant to statutory benefits only — no access to common law damages.
Most extreme case
The statutory reference point for calculating general damages — the maximum amount payable for the most severe injury, with lesser injuries assessed as a percentage.
No-fault benefits
Statutory benefits payable regardless of who caused the accident — including medical treatment, income replacement, and domestic assistance.
Nominal defendant
The entity against which a claim is brought when the at-fault vehicle is unregistered or unidentified — standing in place of an insurer.
Past economic loss
Loss of income between the accident and the date of settlement or judgment — proven by tax returns, payslips, and employer records.
PIC (Personal Injury Commission)
The NSW tribunal resolving motor accident and workers compensation disputes — replacing the former Motor Accidents Authority and Workers Compensation Commission.
Pre-accident earnings
The injured person's average weekly earnings in the period before the accident — the basis for calculating weekly income replacement benefits.
Rehabilitation
Treatment and support aimed at returning the injured person to health and function — funded by the CTP insurer as part of statutory benefits.
Serious injury (VIC)
The threshold in Victoria that must be met to access common law damages — involving a narrative test or 30% WPI under the Transport Accident Act.
SIRA
The State Insurance Regulatory Authority — the NSW regulator overseeing the CTP and workers compensation schemes, setting guidelines and monitoring insurer conduct.
Statutory benefits
The defined benefits payable under the CTP scheme — medical expenses, weekly payments, and domestic assistance — available to all injured persons regardless of fault.
TAC (Transport Accident Commission)
The Victorian statutory body administering the no-fault transport accident scheme — providing benefits and managing common law claims.
Treatment
Medical, surgical, dental, optometric, hospital, and rehabilitative care provided to the injured person — payable by the CTP insurer under statutory benefits.
Unidentified vehicle
A vehicle involved in the accident that cannot be identified — claims are brought against the nominal defendant, subject to corroboration requirements.
WPI (Whole Person Impairment)
A percentage measure of permanent impairment assessed under the AMA Guides as modified by SIRA guidelines — the key threshold for accessing common law damages.
Research these terms in context
Quillio helps personal injury lawyers navigate CTP schemes, calculate benefit entitlements, and draft claim submissions with references to the MAIA, TAC, and SIRA guidelines. See /practice-areas/personal-injury-lawyers or start a free trial.
These definitions are general explanations for educational purposes — not legal advice. CTP schemes differ significantly between states and change through legislative reform and guideline updates. Always verify against the current scheme legislation and insurer guidelines.
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