Running a business in Australia means balancing people, payroll and compliance. One area that trips up many employers is wage deductions. You might be thinking about recouping an overpayment, deducting union fees on request, or setting up a salary sacrifice arrangement - but when is a deduction lawful?
Section 324 of the Fair Work Act 2009 (Cth) sets the rules for when you can deduct money from an employee’s pay. Getting this right protects your team, reduces disputes, and keeps your business compliant with Fair Work requirements.
In this guide, we’ll unpack how section 324 works in practice, address common problem areas (like damages or till shortages), and set out practical steps to build compliant processes. If you’re updating templates or tightening payroll controls, you’re in the right place.
What Does Section 324 Actually Say?
Section 324 is designed to stop unfair or unauthorised deductions from employee wages. It allows deductions in limited, clearly defined situations and requires transparency and genuine employee consent where applicable.
At a high level, a deduction is only permitted if it fits within one of these categories:
- Authorised by law, court or the Fair Work Commission: For example, PAYG tax or child support deductions required under legislation or a court/Commission order.
- Authorised in writing by the employee and principally for the employee’s benefit: Think salary packaging, extra super contributions or voluntary payments for benefits the employee chooses.
- Authorised by a modern award or enterprise agreement: Some instruments permit specific deductions (e.g. for union fees) subject to conditions.
Two points are easy to miss:
- “Principally for the employee’s benefit” really matters. A signed consent alone is not enough if the deduction mainly benefits the employer. This is where many “damages” or “shortage” deductions fall over.
- Consent can be withdrawn at any time. If an employee revokes written authorisation, you must stop making that deduction from that point forward.
Related provisions also apply. Section 325 stops employers from forcing employees to spend or pay back amounts that benefit the employer, and section 326 makes terms requiring unreasonable payments ineffective. These sections work together with section 324 to prevent unfair reductions in take‑home pay.
When Are Deductions From Wages Allowed?
Let’s break down the common lawful scenarios and where employers often go wrong.
1) Deductions Required By Law Or Order
These are mandatory and straightforward - examples include PAYG tax and child support. Provided you follow the relevant legislation or order, these deductions are permitted.
2) Written Authorisation - Principally For The Employee’s Benefit
This is the most commonly used pathway and the most commonly misunderstood. You need:
- Clear, written consent from the employee identifying the amount (or method of calculation) and the purpose of the deduction; and
- Principal benefit to the employee, such as voluntary salary sacrifice to super, a novated lease, or payments for optional goods/services the employee elects to receive.
Even with consent, a deduction that primarily benefits your business (for example, covering your costs or losses) will not satisfy section 324. If you’re unsure whether a benefit is principally for the employee, it’s wise to get advice before processing the deduction.
3) Authorised By An Award Or Enterprise Agreement
Some instruments permit specific deductions (often with extra safeguards). Always check the exact terms that apply to your employees. If an award/EA is silent or prohibits a type of deduction, you can’t rely on section 324 to do it another way.
4) Salary Packaging And Benefit Programs
Salary sacrifice for additional super, novated leases and similar arrangements are typically permitted where there’s written consent and the employee is the principal beneficiary. Ensure any arrangement is documented and complies with tax and superannuation rules. It’s a good idea to ensure any set‑off or reimbursement language in your Employment Contract aligns with your payroll practices.
5) Minimum Entitlements And Net Pay
Lawful deductions still can’t undermine minimum entitlements under the National Employment Standards or a modern award/EA. In practice, that means your approach to deductions must not leave the employee without their guaranteed minimum entitlements for the pay period.
Can You Charge Employees For Damages Or Till Shortages?
This is one of the most common questions employers ask - and it’s where section 324’s “principal benefit” test really bites.
Examples include a broken laptop, a crashed work vehicle, or a short till at the end of a shift. In most cases, deductions for these types of losses are not permitted simply because the employee signed a broad clause in a contract. Here’s why:
- The deduction usually benefits the employer, not the employee. Even with written authorisation, if the principal benefit is to reimburse the employer, section 324 is not satisfied.
- Award/EA constraints apply. Many instruments expressly limit or prohibit deductions for breakages, shortages or business losses - even if the employee agrees.
- Unilateral deductions are high‑risk. Making a deduction without a valid authorisation pathway can amount to withholding pay unlawfully.
If an employee is genuinely responsible for damage or loss, the appropriate pathway is usually outside payroll deductions - for example, a properly managed disciplinary process or, in rare cases, separate debt recovery. Before heading down that path, consider proportionality, workplace relations impacts and the rules in any applicable award/EA.
Note that “set‑off” clauses don’t fix this. A general set‑off term in an employment agreement cannot convert an otherwise unlawful deduction into a lawful one. If you use set‑off for paying above‑award rates, make sure your clause is properly drafted and used only for that purpose, consistent with guidance on set‑off clauses.
Handling Overpayments The Right Way
Payroll mistakes happen. The safest way to deal with an overpayment is to be transparent and agree on a reasonable repayment plan in writing.
Step 1: Identify And Explain The Error
As soon as you spot the issue, tell the employee what happened, how much was overpaid, and the proposed approach to fix it. Provide a simple breakdown so it’s clear and fair.
Step 2: Get Written Agreement
Obtain written consent that specifies the amount and how repayments will occur (for example, a set dollar amount per pay cycle). Avoid “blanket” permissions - keep it specific to the overpayment and this employee.
Step 3: Be Reasonable In The Repayment Schedule
Repayment arrangements should not cause financial hardship. Many employers spread recovery across several pay periods so employees maintain a reasonable take‑home pay.
Step 4: If No Agreement, Consider Alternatives
If the employee won’t consent, you generally should not deduct unilaterally unless an award/EA or law specifically allows it. In that case, recovery as a debt outside payroll may be the appropriate path. For a deeper dive into options and risks, see this overview of employee overpayment.
Key Cautions
- Consent can be withdrawn. If the employee revokes consent, stop deductions immediately and reassess next steps.
- Keep records. Store authorisations, calculations and communications with your payroll records.
- Consider tax and super implications. Depending on how the overpayment occurred, your payroll software and reporting may need adjustments.
Get Your Documents And Processes In Order
Strong templates and clear processes make compliant deductions much easier.
Employment Contracts
Use a contract that reflects the way your business actually runs payroll. Include a concise deductions clause that acknowledges section 324, but don’t rely on a broad clause for everything - many deductions still need a separate written authorisation. If you’re refreshing templates, consider updating your Employment Contract across full‑time and part‑time roles at the same time so your approach is consistent.
Keep a short form ready for deductions that require written consent (for example, voluntary benefits or a specific repayment plan). The form should explain what the deduction is for, the amount or method of calculation, and the timing. It should also make clear that consent can be withdrawn in writing at any time.
Payroll And HR Policies
A practical payroll policy can outline how voluntary deductions are set up, how overpayments are handled, and who signs off internally. Consider including these policies in your Workplace Policy suite and rolling them out alongside your staff induction.
Staff Handbook
A user‑friendly handbook is a great way to bring policies together and set expectations. It can explain what types of deductions might occur (e.g. voluntary super top‑ups) and where employees can find the authorisation form. If you’re formalising these materials, it’s worth bundling them into a coordinated Staff Handbook roll‑out.
Award/EA Mapping
Map each role in your business to the correct award or enterprise agreement and capture any deduction rules they contain. This reduces the risk of applying a deduction across the board when an instrument prohibits it for a particular role or classification. If you’re not sure which instrument applies, it may be time for an award compliance check.
When To Get Advice
Some situations need tailored guidance - for example, a contested overpayment or a proposed deduction that sits in a grey area. A quick check‑in with an employment lawyer can save time and prevent costly disputes.
Best Practices To Stay Compliant
Here’s a practical checklist you can apply to your payroll process.
- Use the right pathway. Before deducting, confirm the legal basis: required by law/order, written consent for the employee’s benefit, or authorised by award/EA.
- Be specific and transparent. Written authorisations should clearly identify the amount (or calculation method), timing and purpose.
- Respect revocation. Stop deductions once consent is withdrawn, and consider alternative approaches if needed.
- Keep good records. Store the authorisation, calculations, communications and payroll entries together.
- Avoid using deductions to cover business losses. Don’t rely on payroll to recover damages, breakages or shortages. Manage these via performance processes or separate recovery pathways where appropriate.
- Review templates and systems regularly. Update contracts, forms and policies when awards or practices change, and ensure your arrangements align with any set‑off approach in your contracts and payroll system.
- Consider tax and super settings. Salary packaging and sacrifice arrangements should be structured correctly; seek tax/super advice as needed.
If you’re unsure whether a specific deduction is allowed, pause and get advice. Acting first and fixing later can expose your business to penalties and back‑pay orders. In disputed situations, unilateral deductions often look like withholding pay, which may lead to enforcement action.
Key Takeaways
- Section 324 allows wage deductions only in narrow circumstances: required by law/order, authorised in writing and principally for the employee’s benefit, or permitted by an award/EA.
- Written consent alone is not enough if the deduction mainly benefits the employer - this is why “damages”, breakages or till shortages are usually not deductible via payroll.
- Treat overpayments transparently: agree on a written, fair repayment plan, and avoid unilateral deductions unless a legal instrument clearly allows it.
- Align your Employment Contract, authorisation forms and payroll policy so they work together, and keep clear records for every deduction.
- Check award/EA rules before applying any deduction; instruments often add extra limits or conditions.
- When in doubt, get tailored advice early - it’s faster and cheaper than resolving a deduction dispute later.
If you’d like a consultation about section 324, compliant deductions or updating your payroll documentation for your Australian business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no‑obligations chat.
