Can you legally extend a probation period in Australia?
Yes，but only in certain circumstances, and only if handled correctly. Employers must rely on the employment contract and ensure the extension does not breach workplace laws.
We look at when and how a probation period can be extended, and the risks employers must manage.
For broader guidance on structuring and managing probation correctly, read our full probation period guide.
Can a Probation Period Be Extended?
A probation period can only be extended if the employment contract allows it — or if both parties agree to amend the contract before the probation expires.
Probation is not automatically extendable. Once it expires:
- The employee is considered confirmed (if the contract says so), or
- The probation clause simply ceases to operate.
Importantly, extending a probation period does not reset statutory employment timelines under the Fair Work Act, including the minimum employment period for unfair dismissal claims.
For example:
- If an employee has already completed 6 months (or 12 months in a small business), they may become eligible for unfair dismissal — even if probation is extended.
Employment Contract Requirements
The starting point for any probation period extension is the employment contract.
Employers should check:
- Does the contract explicitly allow an extension?
- Does it specify how long an extension may be?
- Does it require written notice?
- Are there conditions attached (e.g., performance concerns)?
If the contract includes a clause such as:
“The Company may extend the probation period at its discretion…”
then extension is generally permitted — provided it is exercised reasonably and before the original probation expires.
When Is It Appropriate to Extend Probation?
Extending a probation period can seem appropriate when:
- Performance is inconsistent but improving
- The employee has not yet demonstrated full competency
- There has been extended leave during probation (e.g., illness)
- The employer needs more time to assess cultural fit
- Training or onboarding was delayed
Extension should not be used to:
- Avoid making a termination decision
- Delay addressing serious misconduct
- Circumvent unfair dismissal thresholds
- Mask discriminatory motives
If the employee is clearly unsuitable, termination during probation may be the lower-risk option.
Employee Consent Requirements
If the employment contract allows extension, formal consent may not be strictly required — but best practice is to document the extension in writing and obtain acknowledgment.
If the contract does not allow extension, then:
- The probation period can only be extended by agreement.
- The employee must voluntarily consent.
- The variation should be documented in writing.
- Consideration (such as continued employment) should be clear.
Without mutual agreement, attempting to extend probation unilaterally could result in a breach of contract.
Legal Risks of Extension
Extending a probation period carries several legal considerations.
- Unfair Dismissal Timing
The minimum employment period for unfair dismissal is:
- 6 months (15+ employees), or
- 12 months (fewer than 15 employees)
Extending probation does not delay these statutory thresholds.
An employee may still qualify to bring an unfair dismissal claim even if probation has been extended.
- Adverse Action and Discrimination
An extension could be challenged if it appears connected to:
- Pregnancy or parental leave
- Illness or disability
- Workplace complaints
- Requests for flexible work
- Union activity
If an employee alleges adverse action, the burden may shift to the employer to prove the decision was not for a prohibited reason. Clear documentation is essential.
- Breach of Contract
If probation is extended after it has already expired, the employee may argue they were automatically confirmed in the role.
Failing to follow contractual wording precisely can expose the business to legal disputes.
- Workplace Culture and Morale
Beyond legal risks, poorly handled probation extensions can:
- Damage trust
- Reduce engagement
- Increase turnover
- Undermine your employer brand
A probation period should feel structured and fair — not indefinite.
Best Practice Process for Extending Probation
To reduce risk and maintain compliance, employers should adopt a structured approach.
- Review the Employment Contract Early
At least 2–4 weeks before probation ends:
- Check the clause
- Confirm extension rights
- Assess unfair dismissal timing
- Consider whether termination is more appropriate
Do not wait until the final day.
- Conduct a Formal Review Meeting
Meet with the employee to:
- Discuss any performance gaps
- Provide specific examples
- Clarify required improvements
- Set measurable targets
- Outline the proposed extension timeframe
Transparency reduces disputes.
- Confirm the Extension in Writing
Issue a formal letter that includes:
- New probation end date
- Performance expectations
- Review checkpoints
- Consequences if improvement is not achieved
Have the employee sign acknowledgment where appropriate.
- Provide Structured Support
During the extended probation period:
- Offer coaching or mentoring
- Schedule regular check-ins
- Document progress
- Keep file notes of discussions
This protects your position if termination becomes necessary.
- Make a Clear Final Decision
At the end of the extended probation period:
- Confirm employment in writing, or
- Terminate in accordance with notice requirements
Avoid repeated extensions — they weaken your legal position and may appear unreasonable.
Key Takeaway for Employers
Yes, you can extend a probation period in Australia — but only if the employment contract allows it or the employee agrees.
Remember:
- A probation period is contractual, not statutory.
- Extensions do not affect unfair dismissal eligibility timelines.
- Documentation and procedural fairness remain critical.
- Adverse action risks apply regardless of service length.
Handled properly, an extension can provide valuable time to support improvement while protecting your business.