Can You Extend a Probation Period in Australia?

Probation periods are a common and useful tool when you’re bringing someone new into your team. They give you time to assess skills, culture fit and performance, and to make sure the role is right for the employee.

But what if you’re not quite ready to make the call at the end of probation? Can you extend a probation period in Australia, and if so, how do you do it properly?

In this guide, we’ll walk through the legal framework, when an extension makes sense, and the steps to extend a probation period fairly and lawfully. We’ll also flag key risks so you avoid unexpected claims and keep your business compliant.

What Is A Probation Period (And How It Works In Australia)?

A probation period is a contractual period at the start of employment during which you assess suitability for the role. It’s set in the employment contract and usually lasts 3 or 6 months.

Importantly, probation is a contract concept, not a separate category of employment under Australian law. Employees on probation still accrue leave, are covered by the National Employment Standards (NES) and any applicable award or enterprise agreement, and must be paid correctly from day one.

The key legal concept that often gets confused with probation is the “minimum employment period” for unfair dismissal:

• 6 months for employers with 15 or more employees; and
• 12 months for small business employers (fewer than 15 employees).

During this minimum employment period, an employee generally can’t bring an unfair dismissal claim (though other claims may still be available). This minimum period runs from the employee’s start date regardless of what you call “probation” in the contract.

Can You Legally Extend A Probation Period?

Yes - if your contract allows for an extension, or the employee agrees to vary the contract in writing before probation ends. There is no blanket law that caps “probation” itself, but there are practical limits and risks (more on those below).

Check the employee’s contract first. Many modern templates include a clause that lets you extend probation once for a defined period (for example, a further three months) by giving written notice before the original end date.

If your contract is silent, you’ll generally need a short written variation signed by the employee. In that case, keep the variation simple and clear - new end date, reasons, support to be provided, and review checkpoints. If you don’t have a robust contract, consider updating your template Employment Contract for future hires so it cleanly addresses probation, notice and extension mechanics.

Extending probation does not “pause” or reset the minimum employment period for unfair dismissal. Once the employee passes 6 months (or 12 months for small business), they may be eligible to bring an unfair dismissal claim even if you describe them as “still on probation”. So while extensions are possible, they don’t change that threshold.

When Should You Extend Vs End Employment?

Extensions can be useful where performance gaps are genuinely close to being addressed, or you need a little more time to complete training or assess projects that are still in flight.

Consider extending if:

• You’ve given clear feedback and training and can see measurable improvement, but you need a bit more time to confirm consistency.
• There have been external delays (e.g. seasonal workflow, delayed handovers) that make a fair assessment difficult within the original timeframe.
• You and the employee agree that more support and a structured review period would be beneficial.

Consider ending employment (with proper process) if:

• There are fundamental capability or conduct issues that aren’t improving despite feedback.
• Trust has been seriously damaged (e.g. serious misconduct), or there’s a clear misalignment that extra time won’t solve.
• The extension would push you past the minimum employment period and you’re not prepared to run a full unfair dismissal-safe process.

If you decide not to continue, you’ll still need to comply with any applicable notice requirements. You can read more about ending employment during probation and how to follow a fair, documented process in our guide to termination during probation.

How To Extend A Probation Period The Right Way (Step-By-Step)

1) Check the Contract and Industrial Instrument

Start by reviewing the employee’s contract and any applicable modern award or enterprise agreement. Confirm:

• Whether an extension is permitted and for how long;
• Any notice you must give before the original end date; and
• Any consultation obligations that may apply under an enterprise agreement.

Where the contract is silent, you’ll need a brief written contract variation. For guidance on updating terms, see our overview on contract variation.

2) Review Performance and Document the Reasons

Before proposing an extension, compile objective evidence: feedback you’ve given, training provided, attendance records, KPIs to date, and examples of improvement and remaining gaps. Avoid subjective or personal judgments.

If performance is the issue, consider a light-touch Performance Improvement Plan (PIP) aligned to the extension period. Our team often supports employers with a structured performance management process that’s proportionate to risk and your business size.

3) Meet With the Employee and Explain the Proposal

Have a conversation before sending any letter. Explain why you’re proposing an extension, what support you’ll provide, the standards expected, and how you’ll review progress. Invite the employee to respond and ask questions.

Keep the tone constructive. The goal is to help the employee succeed while giving your business time to make a well‑informed decision.

4) Confirm in Writing (Letter or Contract Variation)

Issue a short letter or written variation before the original probation end date. Include:

• The new probation end date (and the precise length of the extension);
• The reasons for the extension in neutral terms (e.g. additional time to assess performance across X tasks);
• The support you’ll provide (coaching, training, check-ins, access to resources);
• Clear, measurable expectations (e.g. KPIs, behaviours, turnaround times);
• Review checkpoints (weekly/fortnightly) and how feedback will be given; and
• A signature block for employee acknowledgement/consent.

If the extension changes the contract (for example, introduces extension rights not already included), both parties should sign. If your contract already allows unilateral extension, you may simply issue a written notice under that clause, but it’s still best practice to get written acknowledgement.

5) Provide Support and Review Regularly

Follow through on coaching and check‑ins. Keep short file notes of meetings and outcomes. If issues persist, escalate feedback promptly - don’t wait until the last week of the extension.

Where performance concerns are more serious, you may also need a formal show cause letter step. That said, many probation extensions are best handled with supportive, practical guidance and crisp expectations.

6) Make a Final Decision - And Action It Properly

Before the extended end date, decide whether to confirm employment or end it. If you’re ending employment, give the correct notice (or pay in lieu), pay any outstanding entitlements, and deliver a clear, respectful termination letter. For help calculating the right notice, refer to our guide on notice periods and, where appropriate, using payment in lieu of notice.

What To Include In Your Documents And Policies

Well‑drafted contracts and policies make probation management - including extensions - smoother and lower risk. Consider the following:

• Employment Contract: Include a clear probation clause, how long it runs, whether and how it can be extended, review points, and notice or payment in lieu during probation. If your template needs a refresh, a tailored Employment Contract can embed these settings for all future hires.
• Extension Letter Template: Keep a short template with fields for new end date, reasons, support, expectations and review checkpoints, and a signature line.
• Performance Review/PIP Template: A simple, scalable document for setting measurable goals and tracking progress during the extension.
• Manager Guidelines: A one‑pager that explains how to run probation check‑ins, give feedback, and escalate concerns early.

If your business uses a staff handbook, align the probation clause with your contract wording so managers and employees get consistent messages.

Key Risks To Watch (Awards, Discrimination, Unfair Dismissal)

Unfair Dismissal Eligibility After 6 or 12 Months

Extending probation beyond the minimum employment period does not prevent an unfair dismissal claim. For employers with 15+ employees, that threshold is six months; for small business employers, it’s 12 months.

If an extension would push you past the threshold, plan on following a fair process, with a valid reason related to capacity, conduct or operational needs, and procedural fairness steps. See how the Fair Work Commission assesses fairness under section 387 of the Fair Work Act.

General Protections (Adverse Action) From Day One

Even inside the minimum employment period, general protections laws apply from the first day. Don’t propose an extension - or end employment - for prohibited reasons such as temporary absence due to illness or injury, pregnancy, family or carer’s responsibilities, union membership, or complaints about workplace rights. Keep your documentation focused on objective performance or capability factors.

Awards and Enterprise Agreements

Most modern awards don’t prescribe probation terms, but some enterprise agreements do. Always check whether an agreement applies to your employee and follow any consultation or review requirements it sets out.

Notice and NES Compliance

Employees on probation are still entitled to NES minimum notice on termination (or payment in lieu) and to have leave accrual, superannuation, and other entitlements treated correctly. Contractual notice during probation can’t be less than NES minimums.

“Set and Forget” Extensions

A common pitfall is issuing an extension letter but not providing real support or feedback. If you later end employment, a lack of fair warning and documented coaching can increase risk - especially if you’re past the minimum employment period. Build in short, regular check‑ins and stick to them.

Late or Unilateral Extensions

Try to communicate an extension proposal at least 1-2 weeks before the original end date. If your contract doesn’t allow unilateral extension, don’t impose it - get written agreement. If the employee doesn’t agree, you’ll need to decide whether to confirm or end employment by the original end date, following proper notice rules. If you do need to end employment during probation, our overview on terminating employment during probation explains process and documentation at a high level.

FAQs About Extending Probation (For Employers)

How long can we extend probation?

There’s no universal statutory cap on probation, but extensions should be reasonable and usually short (e.g. 4-12 weeks). The longer the probation, the more likely you’ll cross into unfair dismissal eligibility, so focus on clear goals and a tight review period.

Can we extend probation more than once?

That depends on your contract and what’s reasonable in the circumstances. Multiple extensions can look unfair or indecisive if you’re not providing concrete support and feedback. If you need more than one extension, be ready to show why, and consider whether it’s time to confirm or end employment.

Do we need the employee’s consent?

If your contract allows you to extend unilaterally by written notice, you can follow that process. Otherwise, get written agreement via a short contract variation. Either way, it’s best practice to discuss the extension and obtain acknowledgement in writing.

Does probation affect leave or super?

No. Probation doesn’t reduce NES entitlements. Full-time and part-time employees accrue annual leave and personal/carer’s leave from day one, and superannuation applies according to ordinary rules.

What if performance is poor during the extension?

Address it promptly and document your steps. Depending on seriousness, consider a PIP, a show cause process, or ending employment with correct notice. Always separate capability issues from any protected reasons (like illness or parental status) and follow a fair, evidence‑based process.

Key Takeaways

• You can extend a probation period if your contract allows it or the employee agrees in writing before probation ends.
• Probation is a contractual tool; it doesn’t pause or reset the minimum employment period for unfair dismissal (6 months, or 12 months for small business employers).
• Use extensions sparingly and purposefully - set clear goals, provide support, and schedule regular check‑ins to track progress.
• If an extension would push you past unfair dismissal eligibility, plan on a fair process and strong documentation in line with section 387 factors.
• Employees on probation still receive NES entitlements, including proper notice or payment in lieu if you decide to end employment.
• Well‑drafted contracts, simple templates, and manager guidelines make extensions smoother and reduce risk for your business.

If you’d like a consultation on extending a probation period in your business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no‑obligations chat.