Reviewed By: Kevin Wong, Director and Personal Injury Lawyer
Last Reviewed: 9 June 2026
Most people meet the law for the first time after they get hurt. A crash on the Kwinana Freeway. A slip at work. A dog bite at a friend’s place. Suddenly you’re reading letters full of words you’ve never used, and those words decide what your claim is worth.
Personal injury legal terms are the standard words used in injury compensation claims in Western Australia. They describe the types of loss you can claim, who is legally at fault, the proof you need, and the time limits that apply. Knowing them helps you follow your own case and ask sharper questions.
Here’s the catch. Much of the advice online quotes the wrong state. New South Wales rules about threshold injuries and 52-week benefit windows get copied onto Australian pages, but WA runs its own system and none of it applies here. This guide covers injury compensation, not criminal or family law, and it’s the kind of page people read before calling Perth personal injury lawyers.
What does economic and non-economic loss mean?
Economic loss is money you can count. Non-economic loss is harm you feel but can’t put a receipt to.
Economic loss covers the financial hit: lost wages, reduced earning capacity, medical bills, rehab and travel to appointments. Most of it adds up from payslips and invoices, so it’s the easier half to prove.
Non-economic loss is the human side: pain, lost enjoyment of life, scarring and mental distress, often called general damages. In WA, damages for pain and suffering are limited by the Civil Liability Act 2002, and minor injuries below a set threshold can attract nothing under this head. Two people with identical bills can walk away with very different totals.
How impairment thresholds can decide your claim
In WA, a single percentage often controls whether you can sue at all. It’s called whole person impairment, or WPI.
Some WA pages call this a threshold injury, a label borrowed from the eastern states. Here, think of it as your impairment percentage.
Workers’ compensation is the clearest example. Under the Workers’ Compensation and Injury Management Act 2023, in force since 1 July 2024, you can pursue common law damages against your employer only if your permanent impairment meets a 15% impairment threshold and you register a formal election. Below that line, you’re held to the statutory scheme.
Here’s what the brochures skip. One or two per cent at that mark can separate a modest statutory lump sum from a common law settlement many times larger, and the rating can hinge on a single medical appointment. Near the line, understand how a workers’ compensation claim is assessed before you sign anything.
Damages, and what they are meant to restore
Damages are the money paid if your claim succeeds. The goal is to put you back, as near as money allows, to where you’d be if the injury never happened.
Watch two words that sound alike. Damage is the harm done to you; damages is the compensation for it.
Damages are economic or non-economic. A strong claim lists them item by item in a schedule of damages, which makes it harder for an insurer to chip away at the total.
What is contributory negligence?
Contributory negligence is the insurer’s argument that you helped cause your own injury. If it sticks, your payout shrinks.
It turns up constantly. The insurer accepts something went wrong, then says you share the blame: you weren’t wearing a seatbelt, or you walked past a wet-floor sign.
If they prove it, the court cuts your compensation by your share of fault: found 20% responsible, you lose 20% of the award. It’s one of the most common defences insurers raise, so what you post early matters. A cheerful holiday photo can be used against a claim about ongoing pain.
Liability and legal responsibility
Liability means legal responsibility for the harm. Working out who’s liable, and for how much, decides who pays you.
Sometimes it’s obvious, like a driver running a red light. Sometimes it’s shared, or fought by an insurer who’d rather pay nothing. Either way, no liability means no compensation.
Negligence in plain terms
Negligence is the failure to take reasonable care where that failure causes harm.
It sits at the centre of most injury claims. To win, you generally show the other party owed you care, fell short, and that the shortfall caused your injury. Reasonable does the heavy lifting; the law expects sensible care, not perfection.
What is a duty of care?
A duty of care is a legal obligation to act sensibly so you don’t harm other people.
In some relationships the law simply assumes it: a doctor owes one to a patient, a driver to everyone on the road, an employer to staff. Proving a duty was owed is the first building block of a negligence claim.
Your duty to limit the damage
After an injury you’re expected to take reasonable steps to stop things getting worse. Lawyers call this mitigation.
This one surprises people. The duty sits with you too, not only the party who hurt you. Skip the physio and an insurer can argue your recovery stalled because of you, not the accident. The most expensive mistake I see is delayed or patchy treatment: it weakens causation and can quietly reduce your settlement. See the doctor. Follow the plan. Keep the records.
How long do you have to claim in WA?
In most WA injury cases you have three years from the date of the injury to start court action. Miss it and the claim is usually finished.
This deadline is the limitation period, or statute of limitations. In Western Australia it’s set by the Limitation Act 2005, and for personal injury the clock runs three years from when your cause of action accrues.
The exceptions matter, and the table below sets out the main ones. Because your claim doesn’t always accrue on the day of the accident, check early rather than assume.
| Claim type | Time limit in WA | Source |
| Most personal injury claims | 3 years from when the cause of action accrues | Limitation Act 2005 (WA), s 14 |
| Fatal Accidents Act claim | 3 years from the date of death | Limitation Act 2005 (WA), s 14 |
| Child under 15 injured in a motor vehicle accident | 6 years | Limitation Act 2005 (WA), s 30 |
| Injured aged 15 to 17 in a motor vehicle accident | Until the 21st birthday | Limitation Act 2005 (WA), s 31 |
| Defamation | 1 year from publication | Limitation Act 2005 (WA) |
| Most other civil claims | 6 years | Limitation Act 2005 (WA) |
What personal injury legal terms mean for your next move
Knowing the words changes the conversation. You stop nodding along and start asking the questions that protect your claim.
Cost is part of that conversation, and WA works differently from the United States, where firms take a percentage of your payout. That is banned here. Under the Legal Profession Act 2008, a WA lawyer cannot calculate a fee as a percentage of your award. They can offer no win, no fee and add an uplift for the risk, but that uplift is capped at 25 per cent of their legal costs, not your compensation.
Most claims turn on evidence and timing, not vocabulary, so the sooner you recognise which terms apply, the sooner you can line up records, meet deadlines and push back when an insurer’s account does not match yours. Plain-English explanations like this do not appear by chance either; firms that publish them often work with a digital marketing partner who knows the legal sector. The more you understand these personal injury legal terms, the harder your claim is to undervalue.
FAQ
What are the most important personal injury legal terms to understand?
The core personal injury legal terms are economic loss, non-economic loss, damages, negligence, liability, duty of care and the limitation period. Together they describe what you can claim, who is at fault, and how long you have to act. In Western Australia, most injury claims must start within three years of the injury under the Limitation Act 2005.
What is the difference between damages and compensation?
They point to the same thing. Damages is the legal word for the compensation paid when an injury claim succeeds. The aim is to restore you, as far as money can, to the position you would have been in without the injury, covering both financial losses and pain and suffering.
How long do I have to make a personal injury claim in WA?
In most cases you have three years from the date your cause of action accrues, set by the Limitation Act 2005 (WA). Different rules apply to children and people under a disability, and a child injured in a motor vehicle accident before age 15 has a longer window. Missing the deadline usually ends the claim for good.
What does contributory negligence mean for my payout?
Contributory negligence is when you are found to have partly caused your own injury, such as not wearing a seatbelt. If it is proven, your compensation is reduced by your share of the blame. A finding that you were 25% responsible cuts your award by a quarter.
What is whole person impairment (WPI)?
Whole person impairment is a percentage rating of how much a permanent injury affects your whole body. In WA workers’ compensation, you generally need a WPI of at least 15% to pursue common law damages against an employer, under the Workers’ Compensation and Injury Management Act 2023. Below that level, you are limited to statutory benefits.
Do I need to know personal injury legal terms before hiring a lawyer?
No, but it helps. Understanding personal injury legal terms lets you follow your own case, spot weak arguments from an insurer, and ask sharper questions. A good lawyer will still explain each term as it applies to your specific claim.
Rebecca Sorgiovanni is the Director of Soul Legal, a trusted Perth-based injury compensation lawyer with over two decades of experience representing injured clients in complex litigation and tribunals across Western Australia.
