Defamation Law in Western Australia: Why It Is Different

Western Australia has adopted neither the 2021 nor the 2023 national defamation reforms. It still runs the original Defamation Act 2005: no serious harm threshold, no mandatory concerns notice, no public interest defence, and its old triviality defence is still in force.

This article addresses defamation law as it currently applies in Western Australia under the unamended Defamation Act 2005 (WA). It contrasts WA's position against the reforms adopted in New South Wales, Victoria, Queensland, South Australia, Tasmania, the ACT and the Northern Territory, covered on the Australian defamation law hub and its other spokes.

WA Adopted Neither Reform Stage

Western Australia is the one Australian jurisdiction that has not adopted either the Stage 1 reforms rolled out from 2021 or the Stage 2 reforms rolled out from 2023. This is confirmed by WA's own legislation register, which shows the Defamation Act 2005 (WA) with a single currency period running from 1 January 2006 to the present, with no reform-related amendment history. It is corroborated by checking the Act's own table of provisions directly: the serious harm provision that exists at s 10A in every adopting jurisdiction simply does not appear anywhere in the WA Act, which moves straight from the corporate-standing rule at s 9 to the deceased-persons rule at s 10. WA is, in effect, still running the original 2005 uniform law, unmodified, while every other Australian jurisdiction has moved at least partway past it.

No Serious Harm Threshold

A defamation plaintiff in Western Australia does not need to prove serious harm as part of their cause of action. This is the position that applied across the whole of Australia before 2021, and it is the position WA has preserved by not adopting the change. See the serious harm threshold in Australia for how this element works in the jurisdictions that have adopted it, and note that none of that page applies in WA.

No Mandatory Concerns Notice

Western Australia has not adopted the mandatory concerns notice precondition to litigation. Elsewhere in Australia, an aggrieved person generally cannot commence defamation proceedings without first giving the proposed defendant a formal concerns notice and waiting out a statutory period, usually 28 days. WA's Act retains the original offers-to-make-amends division at ss 12-19, which lets a publisher volunteer an offer to make amends once a claim is on foot, but it imposes no obligation on the claimant to send a notice or wait before filing. A person considering defamation proceedings in WA should not assume the concerns notice steps described on concerns notices in Australia apply to them; they do not.

No Public Interest Defence, No Peer Review Defence

WA has neither the public interest defence nor the scientific and academic peer review defence, both introduced elsewhere by Stage 1 reforms and numbered s 29A and s 30A respectively in the reforming jurisdictions. WA's defences division goes directly from fair report of proceedings of public concern at s 29 to qualified privilege at s 30, and directly from honest opinion at s 31 to innocent dissemination at s 32, with no equivalent sections inserted at either point. A defendant in Western Australia relying on a public-interest style argument must do so, if at all, through the ordinary qualified privilege defence or the common law, not through a dedicated statutory public interest defence.

No Digital Intermediary Protections

WA has adopted none of the Stage 2 digital intermediary provisions. There is no exemption for intermediaries providing purely technical caching, conduit or storage functions, no exemption for search engines over organic results, no complaints-based innocent dissemination defence, and no power for a court to order a non-party intermediary to prevent access to defamatory digital matter. A platform or intermediary assessing its exposure in Western Australia is dealing with the unmodified 2005 Act and ordinary common law publisher principles, informed by decisions like Fairfax Media Publications Pty Ltd v Voller [2021] HCA 27, without any of the statutory protections available in the reforming jurisdictions. See online defamation in Australia for the fuller national picture.

Triviality: Still a Live Defence in WA Alone

The triviality defence, once available across the whole of Australia, was repealed everywhere Stage 1 was enacted, because the new serious harm threshold was seen to perform a similar filtering function with the burden reversed. Because WA never enacted Stage 1, the Act that repealed triviality elsewhere never touched Western Australia's Act, and s 33 of the Defamation Act 2005 (WA), the defence of triviality, is still in force there. A defendant sued for defamation in Western Australia can still raise triviality as a defence; a defendant sued anywhere else in Australia cannot. See defamation defences in Australia for the full defences list and where each one applies.

The Damages Cap Still Applies in WA

Despite not adopting either reform stage, Western Australia's damages cap mechanism has continued to operate on its own track since 2005, alongside the rest of the country. The cap on damages for non-economic loss reached $520,000 from 1 July 2026 in WA too, declared under s 35(3) of the WA Act and published in Western Australian Government Gazette No. 64 (12 June 2026, p. 1003). Aggravated damages are not limited by that cap in Western Australia either, but the mechanism differs from the reformed states. Western Australia uses its original s 35(2), which allows a court to award damages above the capped figure where the circumstances warrant aggravated damages, rather than the separate additional award that the reformed jurisdictions provide at s 35(2A) and s 35(2B). The practical outcome is similar, in that aggravated damages are not capped, but the two are not the same provision. See defamation damages in Australia for the full mechanics and the section number in every jurisdiction.

What This Means in Practice for a Western Australian Reader

The combined effect of these gaps is that defamation litigation in Western Australia genuinely resembles the position that applied across all of Australia before 2021, not a lighter or heavier version of the reformed law used elsewhere. A prospective WA plaintiff does not face the serious harm hurdle or the concerns notice precondition that a claimant elsewhere must clear first, but a WA defendant retains an extra defence, triviality, that is unavailable anywhere else in the country. Neither side should assume that commentary written about defamation law in New South Wales, Victoria or any other reformed jurisdiction describes the law that applies in Western Australia; on nearly every point covered in this cluster, it does not. Because WA's reform status could change if the state ever does legislate, a reader relying on this page for a matter arising some time after this article's verification date should confirm WA's Act still shows no reform-related amendment history before relying on the position described here.

What Has Not Changed in Western Australia

It is worth being precise that Western Australia is not operating under a wholly different legal system, only an unreformed version of the same original national model every jurisdiction once shared. The underlying tort of defamation, the abolition of the distinction between slander and libel, the core statutory defences of justification, contextual truth, absolute privilege, public documents, fair report, qualified privilege, honest opinion and innocent dissemination, and the excluded corporation rule for corporate plaintiffs, all exist in WA in essentially the same form as they did across the whole of Australia before 2021, and in the same form they continue to exist in the reforming jurisdictions today, layered underneath whatever each of those jurisdictions later added. A defamation claim in Western Australia is not a fundamentally different kind of legal action; it is the same tort, litigated under the framework the whole country used before the 2021 and 2023 reform rounds began.

This article provides general legal information about defamation law in Western Australia, verified 20 July 2026. It is not legal advice about your own situation. For advice, consult a legal practitioner admitted in the relevant Australian state or territory.

Related reading: the Australian defamation law hub, the serious harm threshold, concerns notices, defamation defences, and defamation damages in Australia.

Frequently Asked Questions

Has Western Australia adopted the national defamation law reforms?

No. WA has adopted neither the 2021 Stage 1 reforms nor the 2023 Stage 2 reforms. It still operates the Defamation Act 2005 (WA) in its original, unamended form.

Do I need to prove serious harm to sue for defamation in Western Australia?

No. WA has no serious harm threshold, unlike every other Australian jurisdiction. A plaintiff does not need to prove the publication caused or was likely to cause serious harm to their reputation.

Do I have to send a concerns notice before suing for defamation in WA?

No. Western Australia has no mandatory concerns notice precondition to commencing proceedings, unlike every other Australian jurisdiction.

Is the triviality defence still available in Western Australia?

Yes. WA is the only Australian jurisdiction where the triviality defence, at s 33 of the Defamation Act 2005 (WA), is still in force, because WA never enacted the reform that repealed it elsewhere.

Are there statutory protections for online platforms in Western Australia?

No. WA has no digital intermediary exemptions and no complaints-based defence. A platform assessing its risk in WA is relying on the unmodified 2005 Act and ordinary common law publisher principles only.

What is the damages cap for defamation in Western Australia?

The same as the rest of the country: $520,000 from 1 July 2026, declared under s 35(3) of the WA Act, even though WA has not adopted the broader reform packages that apply elsewhere.

Why is Western Australia's defamation law so different from the rest of Australia?

Because it never enacted either of the two national reform rounds that reshaped defamation law elsewhere from 2021. WA still runs the original 2005 uniform law that every state and territory once shared.