Restraint of Trade Clauses in NSW: When Are They Enforceable?
When an employee leaves and joins a competitor, things can get uncomfortable quickly.
We often see this moment catch business owners off guard. You remember there’s a restraint clause in the contract… but you’re not sure if it actually holds up.
That uncertainty is where problems start.
Restraint of trade clauses can be powerful. But in NSW, they are not automatically enforceable. Courts look closely at how they are written and whether they are fair in the real world, not just on paper.
Understanding how they work can save a lot of stress later.
What is a restraint of trade clause?
A restraint clause is a part of an employment contract that limits what an employee can do after they leave your business.
This might include:
Working for a competitor
Contacting your clients
Using confidential information
On paper, it sounds straightforward. In practice, it is anything but.
What makes a restraint clause enforceable in NSW?
Courts in NSW start from a cautious position.
They assume restraint clauses are not enforceable unless the employer can show they are reasonable.
That usually comes down to three things:
1. A legitimate business interest
You need a clear reason for the restraint.
This might include:
Protecting client relationships
Safeguarding confidential information
Preserving goodwill in the business
If the clause is simply trying to stop competition for the sake of it, it is unlikely to hold up.
2. Reasonable time limits
A restraint cannot last forever.
The court will look at how long the restriction applies and whether that time is genuinely needed to protect the business.
For example:
A short restraint might be reasonable for junior staff
A longer one might be justified for senior employees with deep client relationships
3. Reasonable geographic scope
The restraint should match where your business actually operates.
If your clients are local, a nationwide restraint may not make sense. Courts will look at whether the scope is realistic and necessary.
How NSW courts approach restraint clauses
Courts do not just read the contract. They look at what is happening in real life.
We often explain it this way to clients. The question is not “is this written in the contract?” but “is this fair and necessary in this situation?”
For example, we’ve seen cases where:
A clause looked strong on paper but was too broad to enforce
A business tried to rely on a restraint but could not show real risk
A former employee challenged the clause and the court reduced it
NSW courts can modify clauses in some situations, especially where contracts use cascading clauses. But that is not something to rely on.
If the clause is poorly drafted from the start, enforcement becomes much harder.
When courts refuse to enforce restraint clauses
There are a few common scenarios where restraint clauses fall over.
The clause is too broad
If it tries to cover too many activities, locations, or timeframes, it can be seen as unreasonable.
There is no clear business interest
If you cannot show what you are actually protecting, the restraint may not be justified.
The employee’s role does not support it
A junior employee with limited client exposure is unlikely to be subject to a strict restraint.
The contract was not carefully drafted
Templates and recycled contracts often include generic restraints that do not reflect the business. These are regularly challenged.
Common drafting mistakes we see
This is where many businesses get caught.
A restraint clause might exist, but it does not actually work when tested.
Some common issues include:
Using broad, generic wording that tries to cover everything
Copying clauses from other contracts without adapting them
Setting unrealistic timeframes or geographic limits
Not linking the clause to a clear business interest
Failing to update contracts as the business grows
One situation we see often is a business relying on a contract that made sense years ago, but no longer reflects how the business operates today.
That gap becomes obvious when an employee leaves.
What to do if an employee breaches a restraint
If a former employee joins a competitor or contacts your clients, it can feel urgent.
The first step is to pause and assess.
You need to understand:
What the contract actually says
Whether the clause is likely to be enforceable
What risk the business is facing
From there, options may include:
Sending a formal letter
Negotiating a resolution
Seeking urgent court relief in serious cases
Acting too quickly without understanding the strength of the clause can make things harder.
A simple checklist for SME employers
Before relying on a restraint clause, it is worth asking:
What business interest are we trying to protect?
Is the timeframe realistic for this employee’s role?
Does the geographic scope reflect where we actually operate?
Is the wording clear and tailored to our business?
Has the contract been reviewed recently?
If there is hesitation on any of these, it is worth getting a second look.
When businesses usually seek advice on restraint clauses
We tend to hear from clients at a few key moments:
A senior employee resigns and joins a competitor
A client relationship is at risk
A contract is being drafted or updated
There is uncertainty about whether a clause will hold up
These are high pressure situations. Getting clarity early often changes how the situation unfolds.
Need advice on restraint clauses in employment contracts?
Restraint clauses sit right at the intersection of employment law and commercial risk.
Done properly, they protect what you have built. Done poorly, they create a false sense of security.
We help businesses review, draft, and enforce employment contracts in a way that reflects how they actually operate.
If this is something on your mind, it is worth checking before it becomes a problem.
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