Aggravation of a Pre-Existing Condition — WorkCover NSW
NSW law doesn't require work to be the only cause of your injury. If work even contributed to making a pre-existing condition worse, it's a claim. Insurers push back on this often — our team knows the tests.
For: NSW workers whose existing injury or condition has been worsened by work.
What the law actually says
Specific NSW statutory provisions and case-law tests that apply to this scenario. The detail matters because insurers push back here.
Under section 4 of the Workers Compensation Act 1987 (NSW), 'injury' expressly includes aggravation, acceleration, exacerbation or deterioration of any disease where employment was a contributing factor.
Under section 4 of the Workers Compensation Act 1987 (NSW), 'injury' expressly includes aggravation, acceleration, exacerbation or deterioration of any disease where employment was a contributing factor.
Talk to our teamCompared with other Australian jurisdictions that require work to be the 'significant contributing factor' for disease, NSW uses the lower 'contributing factor' test for many aggravation claims
Compared with other Australian jurisdictions that require work to be the 'significant contributing factor' for disease, NSW uses the lower 'contributing factor' test for many aggravation claims — a critical distinction.
Talk to our teamThe insurer is responsible for the aggravation, not for the baseline pre-existing condition
The insurer is responsible for the aggravation, not for the baseline pre-existing condition — so the entitlement is proportional to the work-caused worsening.
Talk to our teamThe 'you had this before' argument is common insurer pushback. The medical evidence must clearly distinguish pre-injury function from post-aggravation function.
The 'you had this before' argument is common insurer pushback. The medical evidence must clearly distinguish pre-injury function from post-aggravation function.
Talk to our teamSection 9A of the Workers Compensation Act 1987 requires, for most injuries, that employment be 'a substantial contributing factor'
Section 9A of the Workers Compensation Act 1987 requires, for most injuries, that employment be 'a substantial contributing factor' — case law establishes this is a real but not sole or dominant test.
Talk to our teamBoth physical and psychological aggravation claims are accepted
Both physical and psychological aggravation claims are accepted — a worker with pre-existing anxiety whose workplace bullying triggers a psychological injury has an aggravation claim.
Talk to our teamAn aggravation claim does not require a new traumatic event
An aggravation claim does not require a new traumatic event — ongoing work tasks that progressively worsen the condition are enough.
Talk to our teamWhat the NSW and national data says
Source-cited statistics from SIRA, Safe Work Australia and icare — context for how common this scenario is across the NSW scheme.
Body-stressing claims accepted nationally
Sprains, strains and gradual-onset injuries — the category in which aggravation claims are most common. Source: Safe Work Australia, Key Work Health and Safety Statistics 2024 (https://www.safeworkaustralia.gov.au/).
NSW workers supported last year
A meaningful portion of these claims involve aggravation of a pre-existing condition — a standard category under the NSW scheme. Source: SIRA, NSW Workers Compensation System 2023–24 (https://www.sira.nsw.gov.au/).
Want the full picture? See WorkCover in numbers
What NSW WorkCover pays for in this scenario
Once the claim is accepted (or under provisional liability), the insurer pays for every line below directly. Families and workers don't receive invoices.
- Medical treatment directly attributable to the aggravation — GP, specialists, imaging, physio, surgery
- Weekly income payments calculated on PIAWE for the period you're unable to work due to the aggravation
- Psychological treatment if the aggravation is mental-health related
- Rehabilitation and return-to-work support through a rehab provider
- Lump-sum compensation for the work-caused component of permanent impairment, once thresholds are met
- Travel costs for approved treatment appointments
- Compensation lawyer costs usually funded through IRO if the insurer disputes work-relatedness
Not sure what weekly payments might apply? Use the Payment Calculator.
How we help with aggravation of a pre-existing condition claims
One phone call is all it takes. We answer your questions, book the doctor, and line up physio, psychology, rehab or a lawyer when you need one.
We book you in with a WorkCover doctor who takes a careful history that separates pre-injury function from the post-aggravation state — the medical record that makes or breaks these claims. We line up physio or exercise physiology for the aggravation. When insurers push back with 'you had this before', we put you in touch with a compensation lawyer who builds the Section 4 and Section 9A case, with independent medical opinions where needed. Most WorkCover disputes qualify for IRO funding, which usually means the legal costs aren't yours.
WorkCover Doctors
Where most workers and families in this situation start. Call us and we'll set it up.
Learn about workcover doctorsCompensation Lawyer
Lined up when the situation needs it. We book it, and on an accepted claim the insurer pays.
Learn about compensation lawyerWorkCover Physiotherapy
Lined up when the situation needs it. We book it, and on an accepted claim the insurer pays.
Learn about workcover physiotherapyNot sure if this scenario fits your situation? Take the 60-second eligibility check.
More NSW WorkCover reading
Workers Compensation NSW — the complete guide
The pillar article covering every part of the NSW scheme — weekly payments, permanent impairment, disputes.
Read moreContinueShould I claim WorkCover? 8 reasons people hesitate
The honest answers behind the common reasons workers and families hold off.
Read moreContinueAm I eligible for WorkCover? 60-second quiz
Worker status, injury type and reporting window — checked in one pass.
Read moreContinueWorker types — demographic-specific WorkCover guides
Casual, subcontractor, apprentice, migrant, young worker — how NSW WorkCover handles each.
Read moreAggravation of a Pre-Existing Condition — common questions
The questions that come up most often on this scenario. Short-form answers — call for detailed guidance.
Other Scenarios
Aggravation of a Pre-Existing Condition — start with one phone call.
If the claim is disputed, we put you in touch with a compensation lawyer. Our help is free. Appointments are billed to the insurer on accepted claims.
Speak to Our Team