Most people don't think about legal deadlines while they're recovering from a medical error, or trying to understand what went wrong. Understandably, the immediate priority is health, not litigation. But medical negligence claims in New South Wales are subject to strict statutory time limits, and once they expire, a claim is generally barred altogether, regardless of how strong it might otherwise have been. Knowing how those time limits work, and when the clock actually starts running, matters well before you decide whether to bring a claim.
Time limits for medical negligence claims in NSW come from the Limitation Act 1969 (NSW), specifically Division 6 of Part 2, inserted into the Act in 2002. This Division applies to any cause of action for damages relating to the death of, or personal injury to, a person, regardless of whether the claim is framed in tort, contract, under statute or otherwise. A medical negligence claim, whether against a hospital, a specialist, a surgeon or a GP, falls squarely within this Division. The main carve-out is for claims under the Motor Accidents Compensation Act 1999 or the Motor Accident Injuries Act 2017, which run under their own, separate schemes.
Section 50C of the Act sets two limitation periods, and a claim is barred once whichever one expires first has passed. The first is the three year post-discoverability limitation period: three years running from the date the cause of action is discoverable by the person bringing the claim. The second is the twelve year long-stop limitation period: twelve years running from the time of the act or omission alleged to have caused the injury, regardless of when it was discovered. In most cases the three year discoverability period is what actually determines the deadline, because it typically starts well before the twelve years is up. But the twelve year long-stop exists as an absolute outer limit, and it can bar a claim even where a patient genuinely didn't, and couldn't reasonably have, realised sooner that something had gone wrong.
Worried you might already be close to running out of time?
If treatment happened some time ago, working out your actual discoverability date, not just counting years from the treatment itself, is the first step. Our Medical Negligence team can assess where you stand and whether an extension application is realistically available.
Free consultationThe three year clock doesn't start on the date of the treatment itself. It starts on the date a claim becomes discoverable, and section 50D sets out precisely what that means. A cause of action is discoverable on the first date a person knows, or ought to know, each of three separate facts: that the injury has occurred, that the injury was caused by the fault of the defendant, and that the injury was sufficiently serious to justify bringing a claim.
All three facts need to be known, or reasonably knowable, before the clock starts. This matters in medical negligence cases more than most, because it's often not obvious straight away that an adverse outcome was caused by substandard care rather than an unavoidable complication or a known risk of treatment. The ought to know limb is an objective test: a person is treated as knowing a fact once it would have been ascertained had they taken all reasonable steps to find it out, so simply not asking the question, once there is reason to ask it, won't necessarily stop time from running.
The Act contains two further provisions that can affect when time runs, both relevant to families rather than the injured person alone. Under section 50E, where a claim is founded on injury to a person who was a minor at the time, and the claim is against a parent, guardian or close associate of a parent or guardian, the claim is treated as discoverable when the victim turns twenty-five, or when it's actually discoverable, whichever is later, and the twelve year long-stop then runs from that twenty-fifth birthday.
More generally, section 50F suspends the running of a limitation period while a person is under a disability. A minor is under a disability, but not while they have a capable parent or guardian able to act for them. An incapacitated person is under a disability for a continuous period of twenty-eight days or more, unless someone already manages their affairs as a protected person under guardianship or trustee legislation. In practice, this means the running of time for a child's claim, outside the section 50E situation above, is not usually suspended while a capable parent or guardian is available to bring it on the child's behalf.
Sometimes. Section 62A, which sits in Part 3, Division 4 of the Act (the provisions dealing specifically with personal injury cases arising after the 2002 amendments), lets a person with a cause of action under Division 6 of Part 2 apply to a court for an extension of the twelve year long-stop limitation period, though the court cannot extend it beyond three years after the date the claim actually became discoverable. In deciding whether to grant an extension, section 62B directs the court to have regard to all the circumstances, including the length of, and reasons for, the delay; the extent to which the defendant would be prejudiced by evidence no longer being available because of the delay; and the nature and extent of the injury or loss involved. There is no equivalent, separate mechanism to extend the three year discoverability period itself, because that period is already tied to when the claim was actually or reasonably discoverable rather than to a fixed date, which is precisely why establishing the discoverability date accurately matters so much.
Being within time is necessary, but it isn't sufficient on its own. A medical negligence claim still has to establish that a health practitioner breached the standard of care expected of them. Under section 5O of the Civil Liability Act 2002 (NSW), a professional does not incur liability in negligence if they acted in a way that was, at the time, widely accepted in Australia by peer professional opinion as competent professional practice, unless a court considers that opinion irrational, and that peer opinion doesn't need to be universal to count. Section 5P separately makes clear that this defence doesn't apply to a failure to warn a patient of the risks associated with treatment, which is assessed on ordinary negligence principles instead. None of this changes the time limit itself, but it's worth knowing early, since it shapes what evidence, including expert medical opinion, a claim will eventually need.
The Limitation Act's time limits for medical negligence claims are a single, state-wide statutory scheme. They apply in exactly the same way whether the treatment took place at a major Sydney teaching hospital, a regional base hospital, or a suburban GP's surgery, and nothing in the Act varies the three year or twelve year periods by location. Where location can matter in practice, rather than in law, is access: patients outside Sydney and Newcastle can face longer waits to see the relevant specialist for a second opinion or a fresh diagnosis, and that can affect exactly when a claim genuinely becomes discoverable under section 50D. Wherever you are in NSW, working out that discoverability date accurately, rather than assuming a fixed date from the original treatment, is the first practical step.
If you're a patient or a family member trying to work out where you stand, our Medical Negligence team can assess your position, including when your claim is likely to have become discoverable and how much time you realistically have left. Where a claim also raises broader dispute resolution questions, our Litigation and Dispute Resolution team can advise on the options available. Get in touch for a free consultation.
This publication is intended as general information only and does not constitute legal advice. Please seek independent legal advice before acting on anything contained in it.
Liability limited by a scheme approved under Professional Standards Legislation.
Generally, whichever period expires first: three years from the date your claim becomes discoverable, or twelve years from the treatment itself. In most cases the three year discoverability period is what actually determines your deadline, since it usually starts well before the twelve year long-stop period runs out.
Your claim becomes discoverable once you know, or reasonably ought to know, three things: that the injury occurred, that it was caused by someone's fault, and that it was serious enough to justify bringing a claim. All three need to be known, or reasonably knowable, before the three year clock starts running.
Possibly, but only if a court agrees to extend the twelve year long-stop period under section 62A of the Limitation Act, and only up to three years after your claim actually became discoverable. Extensions aren't automatic, and courts weigh the delay, the reasons for it, and any resulting prejudice to the other side.
If a child's claim is against a parent, guardian or close associate of one, it becomes discoverable at age twenty-five at the earliest. Otherwise, the ordinary time limits generally still run once the child has a capable parent or guardian able to bring a claim on their behalf.
That's exactly what the discoverability test is designed for. Your three year period runs from when you actually knew, or reasonably ought to have known, that the injury was caused by someone's fault, not from the date of the original treatment, so a recent realisation can still leave you within time.
It can. Section 50F of the Limitation Act suspends the running of a limitation period while a person is under a disability, including certain incapacitated people, though not while a minor has a capable parent or guardian available to act for them.
No. Being within time only means your claim can be brought. You still need to establish that a health practitioner's care fell short of what was widely accepted in Australia as competent professional practice, which is usually assessed with the help of independent expert medical evidence.
Get advice as early as possible. Establishing exactly when your claim became discoverable, and whether the twelve year long-stop period might already be in play, takes a careful review of your medical history and treatment timeline, and that's easier to do properly before a deadline is imminent.
