McManus v QBE Insurance (Australia) Limited [2026] NSWPIC 175: single-vehicle crash, sudden medical episode, and no mostly-at-fault finding
In McManus, the Personal Injury Commission found that a single-vehicle crash did not automatically make the injured driver wholly or mostly at fault. The practical answer is that an insurer must still test the real cause of the crash, including whether a sudden and unforeseen medical episode explains the loss of control.
General information only, not legal advice. The case is useful when insurers treat “single-vehicle” as the end of the enquiry instead of doing a proper fault analysis under ss 3.11 and 3.28 of the Motor Accident Injuries Act 2017.
Answer first: what should claimants take from McManus?
If your NSW CTP insurer says you were mostly at fault because your vehicle left the road by itself, McManus is a reminder that the label “single-vehicle accident” is not enough. The insurer needs a reasoned fault analysis that deals with the medical, factual, and timing evidence. A sudden medical episode may break the assumption that the driver simply failed to take reasonable care, but only where the evidence is credible and connected to the crash.
The decision does not guarantee ongoing statutory benefits. It gives claimants a focused way to challenge a shortcut decision: identify the medical episode, prove why it was unexpected, show how it affected control of the vehicle, and explain why the insurer’s mostly-at-fault reasoning has not met the statutory threshold.
What happened?
The claimant was driving on a gravel road when his left arm and hand suddenly locked due to a medical episode associated with left cubital tunnel syndrome. He lost control and collided with an embankment, suffering serious injuries.
QBE argued the accident was caused wholly or mostly by the claimant’s fault. The PIC did not accept that position and found the mostly-at-fault threshold was not met.
Why the case matters
For claimants, this is a practical authority against overreach in fault disputes. The decision reinforces that insurers must engage with real causation facts, not just accident format labels.
It can be especially useful where benefits are threatened after 26 or 52 weeks because an insurer has jumped too quickly to a mostly-at-fault conclusion.
The point is most important for people whose treatment, care, or weekly payments depend on whether they remain entitled to statutory benefits beyond the early claim period. A poor fault decision can affect access to income support and medical expenses even while the claimant is still trying to stabilise their injuries.
What the PIC focused on
- whether the episode was sudden, genuine, and unforeseen at the relevant time
- whether the claimant’s conduct, viewed fairly, met the statutory “wholly or mostly at fault” standard
- whether the insurer’s reasoning matched the actual evidence rather than assumptions from a single-vehicle mechanism
Evidence that can make or break a sudden medical episode argument
A medical episode argument usually succeeds or fails on chronology. The most useful evidence is not just a later specialist label. It is the full trail showing what was known before the crash, what happened in the seconds before impact, what symptoms were reported immediately afterwards, and whether later medical opinions fit that early record.
Helpful claimant evidence
- ambulance, hospital, GP, and physiotherapy notes that record symptoms close to the accident
- clear detail about what the driver felt immediately before losing control
- evidence about whether the episode was expected, recurring, treated, or previously diagnosed
- witness, passenger, or first-responder observations about the driver’s presentation after the crash
- specialist reports that connect the condition to the actual mechanism of the accident
Common insurer weaknesses to test
- treating a single-vehicle crash as proof of fault without analysing causation
- overstating delay in diagnosis when early symptom records still support the episode
- ignoring evidence that the episode was sudden or not reasonably foreseeable
- failing to distinguish ordinary driver error from an involuntary medical event
- not explaining why the claimant’s conduct reaches the “mostly at fault” threshold
Practical steps if your insurer relies on mostly-at-fault reasoning
Start by asking for the insurer’s written reasons and the documents it relied on. Then compare those reasons against the medical and factual chronology. If the decision affects weekly payments, treatment, or care benefits, do not wait until the next payment cycle to act because review and dispute steps can be time-sensitive.
- prepare a one-page timeline from pre-crash symptoms through ambulance, emergency, GP, and specialist reviews
- separate known medical history from the sudden event that allegedly caused the loss of control
- identify every inconsistency the insurer relies on and whether the original record actually supports that reading
- consider whether an internal review, medical dispute, or PIC pathway is the correct response for the decision made
- keep requesting approved treatment while the dispute is being prepared, especially where delay could worsen recovery
Related NSW CTP guides on internal review, stopped weekly payments, and PIC review pathways explain how the next step may differ depending on whether the dispute is about legal fault, medical assessment, or benefit calculation.
Plain-English takeaway
A single-vehicle crash is not automatic proof that you were mostly at fault. If there was an unexpected medical event, the insurer still has to prove the statutory test properly.
For live disputes, get the chronology tight: pre-accident condition, what happened in seconds before loss of control, and early medical documentation. That evidence quality usually decides these matters.
Use the case as a reasoning tool, not as a slogan. The strongest submission will explain why the medical event was not reasonably foreseeable, why it caused the loss of control, and why the insurer’s decision does not fairly establish mostly-at-fault conduct.
Frequently asked questions
- What did McManus v QBE [2026] NSWPIC 175 decide?
- The PIC found the crash was not caused wholly or mostly by the claimant’s fault, even though it was a single-vehicle accident, because the evidence supported a sudden and unforeseen medical episode.
- Why is this useful for NSW CTP claimants?
- It pushes back on a common insurer shortcut: “single-vehicle crash means mostly at fault.” The decision shows the real question is whether fault analysis properly accounts for what actually happened at the time.
- Does this case mean every medical-event crash avoids mostly-at-fault findings?
- No. The proposition is narrower. Claimants still need credible medical and factual evidence showing the episode was genuine, sudden, and relevant to loss of control.
- What evidence matters most in this kind of dispute?
- Early records of symptoms, diagnosis history, mechanism detail, and a consistent chronology linking the episode to the crash are usually decisive.
- What should I do if weekly payments or treatment funding are reduced because of a mostly-at-fault decision?
- Ask for the insurer’s reasons in writing, gather the documents that explain the medical episode and crash mechanism, and get advice about internal review or PIC timeframes before deadlines pass.
- The insurer says there was no immediate specialist diagnosis, so the medical episode story is weak. How should I respond?
- The key issue is timeline reliability, not whether every specialist report existed on day one. Keep GP notes, emergency records, symptom progression, medication changes, and witness details aligned so the chronology stays coherent from the crash onward.
Decision source
Full decision: McManus v QBE Insurance (Australia) Limited [2026] NSWPIC 175.