If you searched for permanent impairment compensation in NSW and found an older article — possibly even one of ours — it’s worth pausing before you rely on it. The rules changed materially through 2025 and 2026, and a guide written before those reforms can now understate or misstate what you’re entitled to, particularly if your injury is psychological.
This is the current, fully updated picture: what permanent impairment compensation is, who can claim it, what’s changed, and what to do about it.
What has changed and why this matters now
Two major legislative changes have reshaped this area since late 2024, those being:
- First, the treatment cost test for approved medical expenses shifted from “reasonably necessary” to the higher bar of “reasonable and necessary” — a change we cover in detail in our dedicated article on that test.
- Second, and more significantly for permanent impairment claims specifically, the whole person impairment (WPI) threshold for primary psychological injury claims has risen substantially.
For claims notified on or after 1 July 2026, there must be at least 25% for a primary psychological injury. The NSW Government has also introduced a minimum threshold of “more than 26%” from 1 July 2027 and “at least 28%” from 1 July 2029. We’ve set out the practical implications of this shift in our companion piece on the reforms now in effect from 1 July 2026.
If you’re working from an article, forum post or advice that predates mid-2025, treat the specific numbers in it as unreliable until checked.
What is permanent impairment compensation?
Permanent impairment compensation is a lump sum payment available under the Workers Compensation Act 1987 (NSW) to workers who suffer a lasting physical or psychological impairment from a work injury. It’s separate from (though it can sit alongside) weekly payments and medical expense cover, and it’s assessed once your condition has stabilised — reached what’s called “maximum medical improvement.”
The amount you can receive depends on your whole person impairment (WPI) percentage, assessed by an independent medical examiner using recognised guidelines. Broadly, the higher your assessed WPI, the higher your lump sum entitlement, and crossing certain thresholds can also open the door to work injury damages — a common law-style claim for damages beyond the statutory lump sum, where your employer’s negligence contributed to your injury. Our guide on work injury damages in NSW covers that pathway in more detail.
Physical injuries vs psychological injuries: different rules now apply
This is the single most important update from the 2024 version of this guide: physical and psychological injuries are no longer assessed on comparable footing.
For most physical injuries, existing thresholds have remained largely unchanged through the recent reforms. The assessment process, however, still follows the same general shape: an independent medical assessment, a WPI percentage, and a lump sum calculated according to that percentage using the relevant statutory table.
For primary psychological injuries, the threshold to access lump sum compensation and work injury damages is now substantially higher (25% WPI for claims notified from 1 July 2026, up from 15%), and weekly payments for most primary psychological injury claims are now generally capped at 130 weeks unless a worker meets the relevant threshold for extension. Workers with a primary psychological injuries will be restricted from accessing weekly compensation beyond 130 weeks unless their impairment is 21% or greater.
If your claim involves a psychological injury — whether standalone or alongside a physical injury — this distinction is not a technicality. It can be the difference between qualifying for a lump sum and not qualifying at all.
How the assessment process actually works
- Reach maximum medical improvement. Your treating doctors need to confirm your condition has stabilised — permanent impairment can’t be properly assessed while you’re still recovering or your condition is likely to change.
- Independent medical assessment. You’ll be examined by an independent medical examiner, who assesses your WPI using the relevant guidelines. For psychological injuries, this involves the Psychiatric Impairment Rating Scale (PIRS) — itself currently under review by the Chief Psychiatrist as part of the reform package, so it’s worth checking whether any changes to the assessment tool affect your claim’s timing.
- Insurer’s determination. The insurer applies the assessed WPI percentage to the relevant statutory schedule to calculate your lump sum entitlement.
- Dispute rights. If you disagree with the WPI assessment or the insurer’s calculation, you have review rights — see our overview of reviewing a compensation decision in NSW and how the Independent Review Office can help.
Pre-existing conditions and aggravation claims
A permanent impairment claim doesn’t require you to have been in perfect health before your work injury. Many claims involve an aggravation of a pre-existing condition — a bad back that was manageable until a workplace incident made it significantly worse, for example. These claims are assessed differently, generally isolating the impairment attributable to the aggravation rather than the pre-existing baseline. If this applies to you, our detailed guide on aggravation of pre-existing conditions in workers compensation claims walks through how these assessments are approached, and remains accurate on the underlying legal principles even after the recent reforms.
Common mistakes that reduce a permanent impairment claim
Settling before reaching maximum medical improvement. A lump sum calculated too early can understate your true impairment.
Relying on a single medical assessment without independent advice. Insurer-appointed assessors aren’t acting for you. Getting your own specialist’s input, and understanding your right to challenge an unfavourable WPI rating, matters.
Not accounting for combined impairments. If you have more than one injury or condition contributing to your impairment, the way these combine under the assessment guidelines isn’t always intuitive, and getting it wrong can materially understate your entitlement.
Assuming the 2024-era thresholds still apply. As above — if your claim involves a psychological injury notified from mid-2026 onwards, the older thresholds simply don’t apply to you anymore.
Practical takeaways
- Permanent impairment compensation is a lump sum for lasting impairment from a work injury, assessed once your condition has stabilised.
- Physical and psychological injuries are now assessed under materially different threshold regimes — check which applies to you.
- For psychological injuries, the threshold for lump sum compensation and work injury damages rose to 25% WPI for claims notified from 1 July 2026, with further increases scheduled.
- The PIRS assessment tool used for psychological injury is under review and could change further.
- Aggravation of a pre-existing condition can still support a valid claim.
- WPI assessments and insurer determinations can be challenged if you believe they understate your impairment.
- Don’t rely on pre-2025 commentary (including earlier versions of this article) for specific thresholds.
Where Gajic Lawyers fits in
We’ve handled permanent impairment and work injury damages claims in NSW for 30+ years, and we track legislative change like this reform package closely so our clients don’t have to. We act on a No Win No Fee basis, offer a free consultation, and our fully paperless, technology-driven process means we can gather and review medical evidence, liaise with assessors and keep you updated wherever you’re based in NSW — including via telemedicine where it helps.
Get your permanent impairment claim reviewed against the current rules
If you have an existing claim, or you’re approaching a WPI assessment, don’t proceed on outdated assumptions about thresholds and entitlements. Call Gajic Lawyers for a free consultation, or reach out through our contact page to have your position checked against the current law.
