Injury compensation lawyer Bathurst: impairment explained

Two measurements do most of the work when an injury is serious. One is the threshold line, which separates soft tissue and some psychological injuries from everything else. The other is whole person impairment, a percentage that describes lasting impairment. Between them, they affect how long statutory benefits can run and what a damages claim, if you have one, can include.

Whole person impairment, or WPI, is a percentage that describes how much a lasting injury affects the body as a whole. It isn't a measure of pain, and it isn't a measure of what you've lost. It's a medical assessment made under set guidelines once an injury has stabilised. In a CTP claim, WPI matters mainly for damages: non-economic loss is only available where WPI is more than 10%.

An assessment above 10% opens damages for non-economic loss and changes some timing rules as well. But many people with genuine, lasting injuries are assessed at 10% or less. That doesn't mean the injury isn't real, or that there is no damages claim. Economic loss, such as lost earning capacity, can still be claimed where the other conditions are met.

Weekly payments cover lost income for a limited time. For a serious injury, the bigger question is the future: will you be able to return to your old job, at the same hours and pay? If not, a damages claim may include past and future economic loss, provided the conditions for damages are met. That part of a claim doesn't depend on WPI above 10%.

From 1 April 2023, the scheme uses the term threshold injury, which replaced the old term minor injury. A threshold injury is generally a soft tissue injury, a threshold psychological injury, or both. Soft tissue here means muscles, tendons, ligaments and similar tissue. Nerve damage is excluded, and so is a full or partial tear of a tendon, ligament, meniscus or cartilage.

The line also decides whether common law damages are open. With only a threshold injury, they generally aren't. With a more serious injury, you may be able to claim damages if another driver was at fault and you weren't mostly at fault. That is why a threshold decision is often the most important decision the insurer makes about a serious injury.

A crash can cause psychological injury as well as physical injury, and sometimes instead of it. Some psychological injuries are classed as threshold injuries; others are not, depending on the diagnosis. Anxiety, low mood, flashbacks or fear of driving are worth having recorded early, so the injury is properly identified in the claim rather than surfacing months later.

Impairment is generally assessed once an injury has stabilised, meaning it's unlikely to change much from here. Assessing too early can understate a serious injury. The insurer may arrange an assessment, you may obtain your own reports, and if the insurer and you disagree about the degree of impairment, the Personal Injury Commission can carry out a medical assessment.

• Whether every injured body part is included
• Changes in your condition since the last report
• Whether you disagree with the result, and the deadline to say so

Serious injury claims rest on evidence gathered over time: records made from the day of the crash, reports on the injury as it develops, and later assessments of what it has left behind. Your own records add the human detail. Start collecting early, keep everything in date order, and make sure every injury is on the record, not just the worst one.

• The police report and your own account of the crash
• Every insurer decision about the injury, with its date
• Every Certificate of Fitness, in order
• Records of how the injury affects your work