Defamation Time Limits in Australia: The One-Year Rule Explained

Defamation proceedings in Australia generally must start within one year of the date of publication, a period that can be extended where a concerns notice is given close to the deadline, and that does not restart each time old material is re-accessed online.

This article uses New South Wales' Limitation Act 1969 as the reference model for how Australian defamation limitation periods work, noting Tasmania's different structure where relevant. The exact limitation provision outside NSW and Tasmania has not been individually verified for this guide; confirm the equivalent rule in your own jurisdiction before relying on a specific deadline.

The One-Year Rule

New South Wales' Limitation Act 1969 fixes the default limitation period for defamation directly:

"An action on a cause of action for defamation is not maintainable if brought after the end of a limitation period of 1 year running from the date of the publication of the matter complained of."

A claim filed more than one year after the relevant publication date will generally be barred, subject to the extension and court-leave mechanisms described below. This is a materially shorter period than the six-year limitation period that applies to most other civil claims in Australia, reflecting a policy judgment that reputational harm should be litigated, or not, relatively promptly.

How a Concerns Notice Can Extend the Deadline

Because a concerns notice is a mandatory precondition to suing in most jurisdictions (see concerns notices in Australia), the limitation rule builds in an extension so that process cannot itself consume the plaintiff's remaining time. Where a concerns notice is given to the proposed defendant within the 56 days before the one-year period would otherwise expire, the limitation period is extended by 56 days minus however many days were left after the notice was given. The statute's own worked example illustrates the mechanism: if a concerns notice is given 7 days before the limitation period would expire, there are 6 days left after the notice is given, so the period is extended by 56 minus 6, that is, 50 days. This calculation exists specifically so a claimant who complies with the mandatory concerns notice step is not simultaneously punished by running out of time to sue while the statutory waiting period elapses.

The Single Publication Rule: One Clock, Not a New One Every Download

For matter published in electronic form, the "date of publication" that starts the one-year clock is defined as the day the matter was first uploaded for access, or first sent electronically to a recipient. This single publication rule displaces the older common law doctrine under which each fresh access, download or republication of the same material could be treated as giving rise to a new cause of action with its own fresh limitation period, a doctrine that in principle could have kept an online publication perpetually open to a new claim for as long as it remained accessible. Under the single publication rule, the clock starts once, on first publication, and later re-access to that same matter, whether by search, link or otherwise, does not restart it. A genuinely new publication, such as materially republishing the same content in a new article, is a separate question from mere continued accessibility of the original.

Tasmania: The Limitation Rules Live Inside the Defamation Act Itself

Tasmania takes a structurally different approach from New South Wales. Rather than housing its defamation limitation period in a general Limitation Act, Tasmania's Stage 1 reforms inserted the one-year rule, the single publication rule and the concerns-notice extension mechanism directly into the Defamation Act 2005 (Tas) itself, at ss 20A through 20AD. The substance of the rules mirrors the NSW position described above, but a reader looking for Tasmania's limitation provision in a separate Limitation Act will not find it there; it sits inside the Defamation Act. See defamation law in Tasmania for how this fits alongside Tasmania's later-than-usual Stage 1 commencement date.

Western Australia: The Concerns Notice Extension Does Not Apply

Everything above about a concerns notice extending the limitation period depends on the concerns notice being a mandatory step before proceedings can start. That requirement arrived with the 2021 reforms, and Western Australia never enacted them.

There is no mandatory concerns notice in Western Australia. A prospective claimant there is not required to serve one before commencing proceedings, which means the extension mechanism described above, where serving a notice close to the deadline buys additional time, has nothing to operate on. A Western Australian claimant who assumes that serving a concerns notice will extend their deadline may simply run out of time.

Western Australia also has no serious harm threshold and none of the digital intermediary provisions, because those came from the same two reform packages. If your publication or your claim is in Western Australia, treat the rules on this page as describing the position in the other seven jurisdictions, and confirm the Western Australian position before relying on any deadline calculation. See defamation law in Western Australia for what does apply there.

Court Leave to Sue Outside the Ordinary Deadline

A court retains a discretion to grant leave for proceedings to be commenced despite the deadline, but this is not a routine extension. Leave is available only where the proposed plaintiff satisfies the court that commencing after the applicable concerns notice period would itself breach the limitation law (because the court's power to extend would, by then, have lapsed), or where the court is otherwise satisfied it is just and reasonable to grant leave in the circumstances. This overlaps with, but is a distinct mechanism from, the 56-day concerns notice extension described above.

Why Defamation Has a Shorter Limitation Period Than Other Civil Claims

Most civil causes of action in Australia carry a six-year limitation period. Defamation's one-year period is deliberately shorter, reflecting a policy judgment that runs through the whole of the modern reform project: reputational disputes are best resolved, or abandoned, while evidence and recollection are fresh, and a publisher should not be left indefinitely uncertain whether a years-old article or broadcast might yet attract a claim. The concerns notice regime and its extension mechanism exist precisely to reconcile that short period with the separate requirement that a plaintiff attempt resolution before litigating, rather than to undermine the one-year policy itself. A plaintiff who delays engaging with the concerns notice process until close to the deadline is relying on a genuinely narrow extension, not a fresh year.

When the Date of Publication Is Not Obvious

The single publication rule answers the easy case, an article or post published once and left unchanged, cleanly: the clock starts on first upload or first transmission. Harder questions arise where content is later edited, where a private message is forwarded on, or where the same underlying allegation appears in a genuinely new article rather than a mere continuation of the old one. Those scenarios turn on whether what occurred is properly characterised as the original publication remaining accessible, which does not restart the clock, or a materially new act of publication, which does. This guide does not attempt to resolve where that line falls for any particular set of facts; it depends closely on what changed and how the new instance came to be published.

The Single Publication Rule and Cross-Border Publication

The single publication rule is specific to Australian jurisdictions applying their own Defamation Act, and it addresses when the clock starts for a matter published electronically within the scope of that Act. It does not, by itself, resolve separate questions about which jurisdiction's law applies where the same electronic matter is accessible from multiple states or territories, or from overseas; that is a different question, addressed by each Act's own choice-of-law provisions, which sit outside the scope of this article. A person dealing with material published or accessed across more than one jurisdiction should not assume the limitation analysis on this page, built around a single jurisdiction's rules, resolves the whole picture without also considering which jurisdiction's law governs the claim in the first place.

This article provides general legal information about defamation limitation periods in Australia, verified 20 July 2026. It does not calculate a deadline for any individual reader's circumstances. For advice on your situation, consult a legal practitioner admitted in the relevant Australian state or territory.

Related reading: the Australian defamation law hub, concerns notices, defamation law in Western Australia, and defamation law in Tasmania for how the limitation rules sit inside that state's own Defamation Act.