Most employment disputes that reach a lawyer's desk are about what an employer did. Adverse action claims are different — they are about why you did it. A perfectly lawful act (adjusting hours, issuing a warning, ending employment) becomes unlawful the moment it is connected to a prohibited reason. That distinction catches a lot of businesses off guard, partly because the causal link can be invisible to the person making the decision, and partly because the Fair Work Act 2009 (Cth) places the burden of disproving that link squarely on you.
This article explains what adverse action is, what the prohibited reasons are, how the reverse onus operates in practice, how claims are resolved, and where businesses most commonly go wrong.
What adverse action means under the Fair Work Act
The Fair Work Act 2009 (Cth) groups adverse action claims under a broader scheme called "general protections" (Part 3-1). The scheme protects employees, prospective employees, and contractors from a defined set of harmful actions taken for prohibited reasons.
Under s 342 of the Act, adverse action by an employer includes:
- dismissing an employee, or threatening to do so
- injuring the employee in their employment — for example, demoting them, reducing their seniority, or removing responsibilities
- altering their position to their detriment — cutting hours, changing duties, or restructuring their role in a way that disadvantages them
- discriminating between one employee and others
The same term covers action by prospective employers (refusing to hire for a prohibited reason) and by employees or industrial associations against employers — but this article focuses on employer-side risk.
The key word in every adverse action claim is because. The action itself is not automatically unlawful. What makes it unlawful is taking it because of a prohibited reason under the Act.
The three main prohibited reasons
Exercising a workplace right (s 340 and s 341)
Under s 340, an employer must not take adverse action against an employee because they have, exercise, or propose to exercise a workplace right. Section 341 defines a workplace right broadly: it includes any entitlement under the Act, a modern award, an enterprise agreement, or a Fair Work Commission process.
In practical terms, a workplace right includes:
- making a complaint or inquiry about pay, conditions, or safety
- requesting flexible working arrangements
- taking leave entitlements (annual leave, personal/carer's leave, parental leave)
- making a workers' compensation claim
- participating in a Fair Work Commission process
An employee does not need to have formally exercised the right yet — proposing to exercise it is enough to trigger the protection.
Industrial activity (s 346)
Section 346 protects employees who are union members, who participate in lawful industrial activity, or who encourage or promote such activity. Taking adverse action because someone is a union member, or because they participated in protected industrial action, is unlawful regardless of any separate legitimate business reason you may have had.
Protected attributes (s 351)
Section 351 prohibits adverse action taken because of an employee's race, colour, sex, sexual orientation, age, disability, marital or relationship status, family responsibilities, pregnancy, religion, political opinion, national extraction, or social origin — to the extent those attributes are not covered by a Commonwealth, state, or territory anti-discrimination law that already applies to the situation.
The reverse onus of proof
This is the feature of the scheme that surprises most employers. Under s 361 of the Act, once an employee alleges adverse action for a prohibited reason, it is presumed that the action was taken for that reason — unless you prove otherwise.
You do not start from a level playing field. The employee establishes the factual foundation (for example, that they made a safety complaint and were dismissed within days of it). The onus then shifts: you must affirmatively prove your decision was not motivated by the prohibited reason.
The High Court addressed how this works in practice in Board of Bendigo Regional Institute of Technical and Further Education v Barclay (2012) 248 CLR 500. The Court held that direct evidence from the decision-maker about their state of mind at the time is central — which is why the quality and contemporaneity of your records matter so much. A manager who cannot clearly articulate a documented, lawful business reason for their decision is poorly placed under s 361.
The practical implication: before you take any action that coincides with an employee exercising a right, you need a clean, documented rationale that predates the exercise of that right and is untainted by it.
Where businesses go wrong
The highest-risk situations are not usually the obvious ones. They arise from ordinary decisions that are poorly timed or poorly documented.
The timing trap. The most common trigger is acting too close in time to an employee exercising a workplace right. Terminating or disciplining an employee shortly after they make a complaint about pay, safety, or bullying creates an inference of connection, even if your actual reason was unrelated. Courts look at timing as circumstantial evidence. A decision made the day after a flexible work request will be harder to defend than one made three months after it, with intervening documented performance management.
Inconsistent treatment. Treating an employee who exercised a right differently from comparable employees who did not — different performance standards, different roster consequences — is itself evidence of a prohibited reason. Consistency is not just good management practice; it is a legal protection.
Undocumented process. If your rationale exists only in someone's head, it will not survive a general protections dispute. Courts expect contemporaneous records: meeting notes, performance logs, policy-compliant warning letters, records of the decision-making steps taken. A decision-maker who cannot produce these is effectively asking the court to take their word for it under a presumption that runs against them.
Changes to hours or duties after leave or complaints. Reducing hours, altering rosters, or removing responsibilities after an employee returns from parental leave, makes a workers' compensation claim, or requests flexible work are high-risk actions. Even if the change is commercially justified, you need to be able to demonstrate that the leave or request played no part in the decision.
How general protections claims are resolved
The resolution pathway depends on whether the adverse action involved a dismissal.
Claims involving dismissal must be lodged with the Fair Work Commission within 21 days of the dismissal taking effect (s 366 of the Act). The Commission will ordinarily hold a conciliation conference. If the matter does not resolve at conciliation, the Commission issues a certificate and the applicant may commence proceedings in the Federal Court or the Federal Circuit and Family Court of Australia.
Claims not involving dismissal — demotions, hour reductions, roster changes — do not go to the Commission first. They proceed directly to the Federal Court or the Federal Circuit and Family Court. Parties may, by consent, ask the Commission to conduct a conference to try to resolve the dispute before litigation proceeds.
Remedies available to the court include compensation for loss suffered, reinstatement to the former position, injunctions to prevent or remedy the contravention, and civil penalties. Penalties can be imposed on both the employer entity and on any individual (director, manager, HR officer) who was involved in the contravention — under s 550, accessorial liability extends to people who aided, abetted, counselled, or procured the breach. For bodies corporate, the maximum civil penalty is five times the maximum that applies to an individual.
How Artificer Legal can help
General protections disputes sit at the intersection of employment law, evidence management, and procedural risk — all areas where early legal input changes outcomes significantly. Artificer Legal works with small-to-medium Australian businesses on both the preventive side and in active disputes.
On the preventive side, we review employment contracts, workplace policies, and performance management procedures to identify processes that create unnecessary adverse action exposure. We help clients document decision-making in a way that is defensible under s 361 before a dispute arises — not after.
When a claim is made, we assist with assessing liability and the strength of the reverse onus position, gathering and organising the contemporaneous evidence that is central to the defence, navigating the Fair Work Commission conciliation process, and advising on settlement or litigation strategy in the Federal Court or Federal Circuit and Family Court.
If you are facing a general protections claim, or you want to review your employment practices before a dispute arises, contact Artificer Legal to discuss your situation.
The one thing worth remembering
Adverse action law does not prohibit hard management decisions. It prohibits making those decisions because of a prohibited reason. The practical discipline this creates is straightforward: before you act, write down your real reason in terms that make no reference to the employee's complaints, requests, or union involvement. If you cannot do that, you are not ready to act.
The general protections scheme in Part 3-1 of the Fair Work Act 2009 (Cth) prohibits adverse action — dismissal, demotion, altered duties, discrimination — taken because an employee exercised a workplace right (s 340), engaged in industrial activity (s 346), or has a protected attribute (s 351). The defining procedural feature is the reverse onus in s 361: once a claim is made, the burden falls on the employer to disprove a prohibited reason. Dismissal-related claims must be lodged with the Fair Work Commission within 21 days; non-dismissal claims proceed directly to the Federal Court or Federal Circuit and Family Court. Remedies include compensation, reinstatement, injunctions, and civil penalties — which can be imposed on individuals involved in the contravention, not just the employer entity. Strong contemporaneous records and consistent, documented decision-making are the practical safeguards.