Probation Period Limits: How Long Can Employers Use Probation Under Australian Law?

A probation period gives you a chance to assess a new employee’s fit, performance, and ability to do the role. But there’s a catch: Australian employment law sets strict limits on how long you can impose probation — and getting it wrong can expose you to unfair dismissal claims and contraventions of the National Employment Standards.

This guide walks you through the legal limits, what triggers those limits, and the practical steps to keep probation periods compliant.

Who Can Use Probation, and For How Long?

The Fair Work Act 2009 (Cth) doesn’t explicitly ban probation periods, but the National Employment Standards (NES) and modern awards impose strict limits. Here’s what you need to know:

Standard probation: 3 to 6 months. Most Australian employers use probation periods between three and six months for general roles — administrative, customer service, operations, management, professional roles. This is the safe zone. Courts and the Fair Work Commission accept these as reasonable without scrutiny.

Extended probation: 6 to 12 months. Probation can extend beyond six months, but only if:

• The role is genuinely senior (executive, strategic leadership roles)
• The role is highly specialized (roles requiring professional qualifications, rare technical expertise, or formal certification)
• The modern award or enterprise agreement explicitly allows it
• Both parties have agreed to it in writing before employment begins

Probation beyond 12 months: generally not permitted. The Fair Work Commission has consistently rejected probation periods longer than 12 months, even for executive roles, as disproportionate and unreasonable. Anything longer invites unfair dismissal claims.

What the National Employment Standards Say

The NES don’t explicitly define probation limits, but they enforce a doctrine of “reasonableness” that courts apply strictly:

• Probation must be reasonable in duration relative to the role’s complexity
• Probation cannot be used to circumvent unfair dismissal protections — e.g., you can’t use a 24-month probation to avoid liability for unfair dismissal claims
• The employer must still follow fair procedures during probation — performance management, clear feedback, warnings — before dismissing for underperformance
• Fixed-term contracts (1, 2, or 3 years) are different from probation — fixed terms can legally last the full contract period, but they attract unfair dismissal protection after 12 months for employees under 18, and after 12 months for senior employees if the contract’s fixed term exceeds 3 years

Modern Awards: What Does Yours Say?

Your relevant modern award may specify probation limits — some do, some don’t. Check your award:

• Some awards (e.g., Hospitality, Retail) are silent on probation length — defaults to common law reasonableness (3–6 months safe, up to 12 months with justification)
• Other awards (e.g., Aged Care, Disability Services) may impose specific limits like “probation not to exceed 3 months” or “6 months for first-year employees”
• Enterprise agreements can vary these limits — an EBA might permit 12 months for specialized roles, or restrict to 3 months

Action step: Check your enterprise agreement and modern award before setting probation. If they’re silent, use 3–6 months and document your reason for any extension beyond 6 months.

Probation and Unfair Dismissal: The Trap

Here’s where many employers trip up: probation does NOT remove unfair dismissal rights. Even on probation, an employee can claim unfair dismissal if they’re sacked without a fair reason or fair process.

A fair dismissal during probation requires:

1. A genuine, documented reason (poor performance, misconduct, not suited to role, inability to do the job)
2. A fair process: clear performance expectations, documented feedback, opportunity to improve, warning before final dismissal
3. A reasonable decision (proportionality — match the outcome to the breach)

Common employer mistakes:

• Dismissing mid-probation with no documentation or feedback — opens you to unfair dismissal claims
• Using probation as a “trial period” with no performance expectations — the Fair Work Commission calls this “artificial” and may rule it unfair
• Extending probation repeatedly without clear milestones — seen as using probation to defer liability, not genuine performance assessment

What Happens After Probation Ends?

Once probation ends, assuming no termination:

• The employee is no longer “on probation” — standard employment protections apply
• Any further performance issues must follow the full performance management process (documented expectations, feedback, warning, opportunity to respond)
• Dismissal now requires stronger substantive and procedural fairness
• Unfair dismissal claims are easier to sustain post-probation because the employer had the “probation window” to assess fit

Practical tip: Document the outcome of probation clearly — “Probation successfully completed, confirmed as full-time employee” — and set new, explicit role expectations going forward. Don’t let probation end ambiguously.

Key Dates and Deadlines: When Probation Matters Most

• Start probation in writing: Put the probation period, end date, and performance criteria in the offer letter or contract
• Document monthly: Keep notes on performance, feedback sessions, and any issues — it’s evidence if a dispute arises
• Decide by the probation end date: Either confirm the employee (in writing) or dismiss them. Don’t let probation “drift” past the agreed date without a decision
• If dismissing: Provide written notice (usually 1 week during probation, unless the contract specifies), a reason (genuine performance issue), and opportunity to respond before final decision

Special Cases: Seniors, Fixed Terms, and Executives

Senior employees (high-income threshold, currently AUD $183,100 p.a. for 2025–26): The unfair dismissal laws don’t apply to you (they’re earning enough to negotiate their own terms), so probation limits don’t protect them. However, you still need a contractual reason and basic procedural fairness to avoid breach of contract claims.

Fixed-term contracts: If you hire someone on a 2-year fixed term, that entire 2-year period is “fixed,” not probation. After 12 months, they gain unfair dismissal rights even though the contract runs to 2 years. Don’t confuse fixed terms with probation.

Executives and directors: Often probation extends to 12 months because of role complexity. Document the justification: strategic decision-making, financial risk, team leadership responsibility, etc.

Red Flags: When Probation Periods Fail in Court

The Fair Work Commission has rejected probation periods (or ruled dismissals during probation unfair) when:

1. No clear performance criteria — probation was vague or had no documented standard
2. No feedback or chance to improve — the employer made no attempt to support the employee
3. Probation is longer than 12 months — the Commission sees this as unreasonable length
4. Probation is used to avoid unfair dismissal law — e.g., “We use 24-month probation so we can sack people easily”
5. No genuine reason for dismissal — the termination was arbitrary or based on protected attributes (age, disability, religion, etc.)

What to Do: Probation Best Practice for Employers

1. Set clear dates: “Probation period: 1 January to 31 March 2026 (3 months)”
2. Agree in writing: Include probation terms in the offer letter and signed contract
3. Specify performance criteria: E.g., “By end of probation: proficiency in X system, zero safety incidents, positive team feedback”
4. Document regularly: Monthly check-ins, written feedback, notes on performance
5. Decide decisively: At probation end, either confirm (in writing) or dismiss (with reason, in writing)
6. If extending probation: Have a strong reason and written justification (e.g., “Extended to 6 months due to complexity of role — specific milestone required by 30 June”)
7. If dismissing: Provide written notice, substantive reason (performance, fit, capability), and give the employee a chance to respond

Summary: Key Takeaways for Employers

• ✓ Standard probation is 3–6 months — this is the safe, low-risk range
• ✓ Probation can extend to 12 months for senior or specialized roles — justify it in writing
• ✓ Probation beyond 12 months risks unfair dismissal claims — avoid it
• ✓ Probation does NOT remove unfair dismissal rights — you still need fair process
• ✓ Document performance monthly and make a clear decision by probation end date
• ✓ Check your modern award or EBA — they may impose specific probation limits
• ✓ Dismissal during probation still requires a genuine reason and fair procedure

Getting probation right protects you from unfair dismissal claims, signals clear performance expectations, and gives you and the new employee a fair chance to assess fit.