Self-Defence as a Defence to Assault in Queensland
Assault — 2026-06-23 — by Sacha Sarah Smith, Civic Law
When does self-defence apply to an assault charge in Queensland? The legal test under ss 271–272 Criminal Code, the limits on force, and what the court considers.
You were involved in a fight. You were defending yourself — or at least, that is what you believe happened. Now you have been charged with assault , and you want to know whether self-defence gets you out of it.
The short answer is: it can. Self-defence is a complete defence in Queensland. If it is made out, you are acquitted — not convicted with a reduced penalty, but acquitted outright. But the law does not accept every claim of self-defence at face value. It draws lines around what is proportionate, what is necessary, and who started it. Understanding those lines — and how they apply to your facts — is what determines whether the defence works.
The Two Forms of Self-Defence
Self-defence in Queensland is governed by sections 271 and 272 of the Criminal Code 1899 (Qld). The Code draws a clear distinction between defending yourself against an unprovoked assault and defending yourself after you started it. The rules — and the limits — are different for each.
Section 271 — You Did Not Start It
If you were unlawfully assaulted and you did not provoke that assault, you may use such force as is reasonably necessary to defend yourself — provided the force you used was not intended to cause death or grievous bodily harm, and was not likely to.
There is an exception for life-threatening attacks. If the nature of the assault was such as to cause reasonable apprehension of death or grievous bodily harm, and you believed on reasonable grounds that you could not otherwise preserve yourself from death or grievous bodily harm, you may use whatever force is necessary — even force that could cause death or grievous bodily harm. The two requirements are that the fear was reasonable, and that the level of force was the only option available to you.
Section 272 — You Did Start It
If you provoked the fight — if you threw the first punch, or your behaviour started the altercation — self-defence is much harder to claim. Section 272 only applies where the other person escalated far beyond what you provoked, to the point that you reasonably feared death or grievous bodily harm.
Even then, when the force you used actually caused death or grievous bodily harm , section 272(2) imposes three hard limits. The defence is not available if:
You first started the assault with intent to kill or do grievous bodily harm
You used force causing death or grievous bodily harm before it became necessary to defend yourself — meaning you escalated first
You did not decline further conflict and retreat as far as was practicable before using that level of force
That third point is critical — and was confirmed as an independent exclusion by the High Court in Dayney [2024] HCA 22. Under section 272, there is an obligation to withdraw from the fight as far as practicable before using lethal or serious force. If you had the opportunity to step back and did not take it, the defence fails.
What "Reasonably Necessary" Actually Means
This is the core question in every self-defence case: was the force you used reasonably necessary to deal with the threat you were facing?
The law assesses this from your perspective at the time — not with the benefit of hindsight, and not from a position of calm reflection. Courts recognise that people in violent situations do not have time to carefully weigh their options. The test is whether a reasonable person in your position would have believed the force was necessary.
That said, there has to be some connection between the threat and your response. Punching someone who raised their fist at you is likely proportionate. Kicking someone on the ground who is no longer a threat is not. The further your response goes beyond the original threat, the harder self-defence becomes.
The Retreat Question
This is one of the most misunderstood areas.
Under section 271 (you did not start it), Queensland law does not impose a legal duty to retreat. You are not required to run away before you can claim self-defence. However, the opportunity to safely leave is something a court will consider when assessing whether the force you used was "reasonably necessary." If you could have walked away easily and instead chose to stay and fight, the court may find that the force was not necessary — even if you did not start it.
Under section 272 (you did start it), the position is different. Where your force caused death or grievous bodily harm, you must have declined further conflict and retreated as far as was practicable before using that level of force. If you did not try to disengage, the defence is not available. This is an explicit statutory requirement — not just a factor in the assessment — confirmed as an independent ground of exclusion by the High Court.
The Burden of Proof
This matters more than most people realise. Once self-defence is raised as a realistic possibility on the evidence, the prosecution bears the burden of disproving it beyond reasonable doubt . You do not have to prove you were defending yourself. The prosecution has to prove you were not.
The four matters the court considers under section 271(1) are: (1) whether you were unlawfully assaulted; (2) whether you provoked that assault; (3) whether the force you used was reasonably necessary; and (4) whether the force was intended or likely to cause death or grievous bodily harm. The prosecution must negative self-defence by proving one or more of these elements beyond reasonable doubt.
Defending Another Person
Self-defence is not limited to defending yourself. Section 273 of the Criminal Code provides that if it is lawful for a person to use force in self-defence, it is equally lawful for another person acting in good faith to use a like degree of force to defend them. The same limits apply — the force must be reasonably necessary and proportionate to the threat. If your friend or family member was being attacked and you intervened, the self-defence analysis is the same as if you were the one being attacked.
Common Misconceptions
None
"They were bigger than me." A size difference is relevant — it goes to what a reasonable person in your position would have feared. But it is not a blanket licence to use any level of force. A significant size or strength disparity can support a finding that you reasonably feared serious injury, but the response still has to be proportionate.
"I only hit them once." The number of strikes is relevant but not determinative. One punch can be excessive if the threat did not justify any physical response. Multiple strikes can be reasonable if you were facing an ongoing, serious attack. The question is always whether the response matched the threat.
Self-Defence and Domestic Violence
Self-defence arises frequently in domestic violence matters — particularly where one party is charged with assault following a physical altercation and says they were responding to violence from the other party.
In the domestic context, the dynamics are more complex. The history of the relationship, the pattern of violence, the relative size and strength of the parties, and the presence of children can all be relevant. A person with a long history of being assaulted by a partner may respond to an apparently minor provocation in a way that only makes sense in the context of years of abuse. These matters require careful analysis of the facts — not assumptions about who the aggressor was based on who ended up being charged.
What Evidence Supports a Self-Defence Claim
A self-defence case is built from evidence — CCTV, witness accounts, your version of events, injuries to both parties, and the sequence of what happened. The detail matters. A generic claim of "they came at me" is not enough. A specific, supported account of what happened is what makes the defence viable.
CCTV and body-worn camera footage — often the strongest evidence. Shows who moved first, the escalation, and whether the response was proportionate.
Witness accounts — independent witnesses carry more weight than friends or associates of either party.
Injuries — the nature and location of injuries on both parties. Defensive injuries (forearm bruises, for example) support a claim of self-defence. Injuries to the complainant inconsistent with the alleged attack undermine the prosecution case.
Your version of events — what you said to police in the early stages shapes the evidentiary foundation the defence is built on. A self-defence case is stronger when it is identified and built from the outset — not raised for the first time at a hearing.
If you believe you were defending yourself, get legal advice before you give a version of events to police.
Related Charges
Self-defence can arise across a range of assault charges. The offence you are charged with affects the court that deals with it, the maximum penalty, and the stakes:
Common assault (s 335 Criminal Code ) — maximum 3 years imprisonment, dealt with in the Magistrates Court
Assault occasioning bodily harm (AOBH) (s 339) — maximum 7 years (10 years if armed or in company)
Serious assault (s 340) — assaults on police, corrective services officers, and other public officers — maximum 7 years (14 years aggravated)
Grievous bodily harm (GBH) (s 320) — maximum 14 years, dealt with in the District Court
Unlawful striking causing death (s 314A) — maximum life imprisonment. Self-defence is a complete defence to this charge, but the stakes could not be higher.
The self-defence analysis under sections 271 and 272 applies to all of these — but the consequences of getting it wrong increase dramatically as the charge gets more serious. For indictable matters dealt with in the District Court, the case is typically contested at trial before a jury.
Talk to Civic Law
If you have been charged with assault and you believe you were defending yourself, the outcome turns on the specific facts. Sacha can review the evidence, assess whether self-defence applies under section 271 or 272, and advise on the best way to run the case — whether that is a contested hearing , negotiation with the prosecution, or submissions at sentence. Call Sacha Sarah Smith on 0425 429 458 .
Common Assault Plea
AOBH Plea
Contested Hearing — Magistrates Court
District Court Plea (GBH / Indictable)