News · Criminal law explainer
Can police detain you without arresting you in NSW?
People are often stopped by police and are not sure whether they are under arrest, free to go, or something in between. In New South Wales police do have powers to detain a person short of arrest, but only for limited purposes. This note explains the difference between detention and arrest, when police can hold you without arresting you, and what your rights are.
By Aaron Kernaghan · Published 3 September 2026
Yes, but only for limited purposes and a limited time. In NSW police can stop and detain you without arrest to do specific things, such as carry out a lawful search, require your identity where the law allows, or give a direction. This is not the same as arrest. If police move beyond those limited purposes and hold you to investigate, that is an arrest, with its own rules.
Detention and arrest are not the same
Arrest is the formal step of taking a person into custody, usually so they can be charged or questioned about an offence. Detention short of arrest is where police lawfully stop and hold a person for a specific, limited purpose, without taking them into custody in that formal sense.
The distinction matters because arrest triggers a set of rights and time limits. Police cannot use a low-level power as a way of holding a person to investigate them; if that is what is happening, it is an arrest.
When can police detain you without arrest?
Police can detain you for as long as is reasonably necessary to exercise a specific power. Examples include stopping and detaining you to carry out a lawful search, to require your name and address where the law allows, to give a move on direction, or to carry out a breath test on a driver. Each of these has its own basis in law.
The detention is tied to the purpose. Once the search or the check is done, the basis for holding you ends, and you should be free to go unless police then arrest you.
How long can it last?
Detention without arrest can last only as long as is reasonably necessary for the specific purpose. It is meant to be brief. A short stop to conduct a search or a check is very different from being held while police decide whether to charge you.
If you are being held longer than the purpose requires, or police are questioning you about an offence, the situation has usually moved into arrest, and the rules about the investigation period and custody apply.
Are you free to go?
A fair question to ask is whether you are free to leave. If police are not exercising a specific power to hold you, and you are not under arrest, you are generally free to go. If they are exercising a power, they should be able to tell you what it is.
Asking calmly whether you are under arrest, and if not, whether you are free to leave, can clarify the position. The answer tells you which set of rules applies.
What are your rights?
During any lawful detention you keep your right to silence about an allegation, and you should give your name and address where the law requires. If the situation becomes an arrest, further rights apply, including the right to try to contact a lawyer.
Our note on arrest powers and your rights explains what happens if you are arrested, and stop and search powers explains the search power that is the most common reason for a brief detention.
Frequently asked.
Can police hold me without arresting me in NSW?
Yes, but only for limited purposes, such as carrying out a lawful search, requiring your identity where allowed, or giving a direction, and only for as long as reasonably necessary for that purpose.
What is the difference between detention and arrest?
Arrest is the formal step of taking a person into custody to charge or question them, and it triggers specific rights and time limits. Detention short of arrest is a brief hold for a specific, limited power.
How long can police detain me without arrest?
Only as long as is reasonably necessary to exercise the specific power, such as a search or an identity check. It is meant to be brief.
How do I know if I am under arrest?
Ask. You can calmly ask whether you are under arrest, and if not, whether you are free to leave. If police are holding you, they should be able to tell you the power they are relying on.
What are my rights if I am detained?
You keep your right to silence about an allegation and should give your name and address where required. If the detention becomes an arrest, further rights apply, including the right to contact a lawyer.
To speak to a criminal defence lawyer, call Aaron Kernaghan on 0421 717 019.
This article is written by Aaron Kernaghan, criminal defence lawyer at Good Legal Lawyers, as at 3 September 2026. It is commentary and reflects the personal opinion of the author only. It is not legal advice, it is not a substitute for advice on your own matter, and it does not purport to be accurate or complete. Any matter referred to may be before the court and any person charged is presumed innocent. For advice on a specific matter, contact Aaron Kernaghan on 0421 717 019 or contact the firm.
More criminal-law commentary by Aaron Kernaghan.
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