Chartered Accountant Timothy Quinn leads Tax & Accounting at Lawpath. 16+ years in tax advisory, specialising in startup growth and expansion. Passionate about supporting entrepreneurial clients with early-stage investment incentives, restructuring, international exit strategy planning, and more.
If you’ve been overpaid by your employer in Australia, you’ll almost always have to pay the money back, but your employer can’t simply take it out of your next pay without your written agreement. How much you repay, and how, depends on when the mistake is found and what you agree to in writing.
Maybe it’s an extra few hundred dollars. Maybe payroll paid you twice. Either way, that email lands like a parking fine: it wasn’t your mistake, and now it’s your problem. The good news is that you have more say in how this plays out than most people realise.
- You’ll usually have to give it back. Money paid by mistake is recoverable as a debt, even when the error was entirely your employer’s.
- No surprise deductions. Under section 324 of the Fair Work Act 2009 (Cth), your employer needs your written authorisation (for a specified amount) or a clause in your award or enterprise agreement before touching your pay.
- Timing changes the number. Found in the same financial year? You repay the net (after-tax) amount. Found after 30 June? You repay the gross amount and amend last year’s tax return.
- You can say no to an unfair plan. You’re entitled to negotiate instalments you can actually afford, and to withdraw a deduction authorisation in writing at any time.
- Knowingly keeping it is where the risk starts. Honest spending isn’t a crime, but deliberately hanging onto money you know isn’t yours can move from a civil debt into criminal territory.
This guide is written for employees. If you run the business and need to recover the money, read our employer guide on what to do if you’ve overpaid an employee instead.
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Overpaid by your employer: do you have to pay it back?
In most cases, yes. Australian law treats money paid by mistake as money you were never entitled to. Your employer can recover it as a debt, whether the error came from a typo, a wrong pay rate or a system glitch.
What the law doesn’t do is let your employer help themselves. There’s a big gap between “you owe us this” and “we’re taking it”. That gap is where your rights sit.
One group has less wriggle room. The ATO notes that employees of state or Australian government departments and agencies are required to repay overpaid amounts. If you’re a public servant, expect a formal process and less flexibility on whether you repay, although you can still negotiate how.
Your employer can also decide not to chase it. That’s their call to make, not yours. And if they waive the debt, they may have a fringe benefits tax issue to sort out, which is one reason many employers won’t simply let it go.
Do you have to tell your employer you’ve been overpaid?
There’s no general law that forces a private-sector employee to report an overpayment. But staying quiet rarely helps you. Payroll errors get found, often at end of financial year, and the later they surface, the messier the tax fix becomes.
Check your contract and workplace policies too. Many codes of conduct (and nearly every public sector code) require you to flag pay errors. Breaching a policy like that can turn a payroll problem into a conduct problem.
Our honest advice? If you spot it, send a short email to payroll. You look trustworthy, you control the timeline, and you avoid a much bigger bill after 30 June.
Is keeping an overpayment theft in Australia?
Spending money you didn’t know was a mistake is not theft. Most people never check their payslip line by line, and the law doesn’t punish that.
Things change once you know. In NSW, section 124 of the Crimes Act 1900 makes it an offence to fraudulently keep property you came by innocently, with a maximum penalty of two years’ imprisonment. Other states have their own dishonesty offences that can cover similar conduct. The key word is “fraudulently”: the risk sits with deliberately keeping money you know isn’t yours, and refusing to engage when you’re asked about it.
Let’s keep this in proportion. In practice, overpayment disputes are handled as civil debts, not police matters. But “I’ll just ignore the emails” is the one approach that can make a dull payroll problem genuinely serious. Engage, even if you’re disputing the amount.
What if the overpayment wasn’t your fault?
It almost never is. Wrong award classification, a duplicated bank transfer, leave loading applied twice: these are employer errors. Unfortunately, fault doesn’t cancel the debt.
Fault does change how reasonable your employer has to be. If you didn’t cause the error, you have a strong case for slow, affordable instalments rather than a lump sum. Say so plainly when you negotiate.
There’s also a legal defence called “change of position”. If you relied on the money in good faith and changed your circumstances in a way you can’t undo (and wouldn’t have done otherwise), a court may reduce what you have to repay. Courts apply it narrowly. Ordinary living costs like rent and groceries don’t count, so don’t build your strategy around it without advice.
Time matters as well. The limitation period for recovering a mistaken payment is six years in most states and territories. An employer who finds an error from five years ago can still chase it, but one from a decade ago is likely out of time.
Can your employer take the overpayment out of your pay?
Only in limited situations. Section 324 of the Fair Work Act sets out when an employer can make a deduction, and “we overpaid you” isn’t one of them on its own. For the full list of permitted deductions, see our guide on what deductions your employer can make from your wages.
| Situation | Can they deduct? | What to watch |
|---|---|---|
| You sign a written authorisation for a specified amount | Yes | You can withdraw it in writing at any time. A deduction for your employer’s benefit can’t be for an amount that varies. |
| Your modern award expressly allows overpayment deductions | Yes | Read the actual clause. Many awards don’t have one. |
| Your enterprise agreement allows it and you authorise it | Yes | You still have to agree. The agreement alone isn’t enough. |
| A court order or law requires it | Yes | Rare for overpayments. Think tax and child support. |
| A general clause buried in your employment contract | Not on its own | A broad clause doesn’t specify an amount, so it won’t meet the written authorisation test. |
| Your employer simply decides to | No | This is an unlawful deduction. You can raise it with the Fair Work Ombudsman. |
| You’re under 18 | Only with a parent or guardian’s written consent | This applies even if an award or agreement allows the deduction. |
That last-but-one row is the one that trips people up. Most contracts have a generic “we may deduct amounts you owe us” clause. Because it doesn’t name a specific amount, it generally won’t authorise a deduction by itself. Check whether you’re covered by an enterprise agreement or employment agreement, because the rules differ.
Worried about the flip side? A Federal Court decision in September 2025 involving Woolworths and Coles (FWO v Woolworths Group Limited [2025] FCA 1092) found that set-off clauses in employment contracts only work within a single pay period. Your employer can’t point to an extra payment last month to excuse underpaying your award entitlements this month.
How much do you repay: gross or net?
This is where the old version of this article went wrong, so let’s get it right. The number depends on which financial year the overpayment is discovered in. If the terms are fuzzy, our explainer on net pay vs gross pay covers the basics.
Found in the same financial year: repay the net amount
You only hand back what actually landed in your account. Your employer then reverses the tax side through their payroll and Single Touch Payroll reporting, so your income statement shows the correct figures.
Example: Jim’s normal fortnightly pay is $2,000 gross. In October, payroll pays him $3,000 gross by mistake. That’s a $1,000 overpayment. Say $300 of the extra was withheld as tax, so Jim actually received an extra $700. The error is found in November. Jim repays $700. He can do that in the same financial year or a later one, as long as the overpayment was identified in the year it happened.
Found after 30 June: repay the gross amount
Once the financial year closes, the overpayment has already been reported to the ATO as your income. Your employer can’t claw back the withheld tax from the ATO for a past year. So you repay the full gross amount, then amend that year’s tax return to get the tax side back.
Example: Pamela has the same $1,000 gross overpayment, with $300 withheld, in May. It isn’t found until August, after the financial year has ended. Pamela repays $1,000 from her after-tax income. She then amends last year’s return so she isn’t taxed on income she’s given back.
Pamela’s cash hit is bigger up front, and her refund comes later. That’s why the same-year route is worth chasing if you spot an error before 30 June. If two or more years have passed since your notice of assessment, the ATO lets you lodge an objection to the time limit on amendments. A tax agent can handle this in one sitting.
What to do in the first 48 hours after you’re told you’ve been overpaid
Panic-signing whatever payroll sends you is the most common mistake here. Slow down and work through these steps.
- Ring-fence the money. If it’s still in your account, move it somewhere you won’t spend it.
- Ask for the calculation in writing. You want the pay periods affected, what you were paid, what you should have been paid, and the gross, tax and net split.
- Check it against your payslips. Sometimes an “overpayment” is really an underpayment in disguise, for example when your employer has you on the wrong award level. If the maths doesn’t hold up, read what to do if your employer isn’t paying you correctly.
- Confirm the financial year. This decides whether you repay net or gross.
- Propose a plan you can actually afford. Weekly or fortnightly instalments are normal. Work out your number before the meeting.
- Get the agreement in writing. It should state the reason for the overpayment, the total, the repayment method, the instalment amount and frequency, and what happens if you leave before it’s repaid.
- Keep copies of everything. Emails, the calculation, the signed plan and each payment you make.
Pay by bank transfer rather than payroll deduction where you can. It keeps your payslips clean, you stay in control of each payment, and there’s no risk of a deduction running past the agreed total.
Some employers ask you to sign a formal document confirming what you owe, such as an acknowledgment of debt deed. These can be produced in court as evidence of the debt and its terms. Only sign one once you’ve checked the figure is right.
Can you refuse an unfair repayment plan?
Yes. You don’t have to agree to a plan that would leave you unable to pay rent. Your employer can’t force a deduction on you, and you can withdraw a written authorisation at any time.
Refusing to pay anything is a different matter. If talks break down, your employer’s next step is to treat it like any other debt: a formal demand, then potentially a small claims application. It’s worth understanding how a letter of demand works so it doesn’t rattle you if one arrives.
If there’s a genuine dispute about the amount, don’t just sit on it. Put your position in writing, offer to pay the undisputed portion, and consider a deed of settlement if you reach a compromise. That locks the deal in so it can’t be reopened later.
Can you be sacked over an overpayment?
Being overpaid is not a lawful reason to dismiss you. Asking questions about your pay, disputing a deduction or bringing a support person to a meeting are all workplace rights. Taking action against you because you exercised them is adverse action under the general protections rules.
That protection has limits. If you knowingly kept money and lied about it, your employer may treat that as a conduct issue in its own right. Honesty is your best protection.
If you’re dismissed shortly after raising pay concerns, move fast. A general protections dismissal claim has to be lodged with the Fair Work Commission within 21 days.
What if you’ve already left the job?
Leaving doesn’t wipe the debt, but it does change your employer’s options. They can’t quietly subtract the overpayment from your final pay unless a deduction is properly authorised. Your wages, accrued annual leave and other entitlements still have to be paid in full. Our guide on whether employers can withhold final pay explains the limits.
Overpaid leave is a common version of this. If you took annual leave you hadn’t accrued yet, the employer may argue the extra is owed back when you leave. Whether they can deduct it depends on your award, agreement or a signed authorisation.
If the claim arrives months later, ask for the same written calculation you’d want as a current employee. Former employers get the numbers wrong too.
What we see in Lawpath consultations
Lawpath’s lawyers and accountants talk to business owners about payroll errors every week. Here’s what those conversations reveal from the employer’s side, and why it matters to you.
Employers deduct first and ask later. A consistent pattern is a business that has already started taking money out of an employee’s pay before checking whether it’s allowed. Our lawyers regularly have to tell them it isn’t. If this has happened to you, you’re not overreacting by questioning it.
Small amounts rarely end up in court. For modest overpayments, the usual advice to employers is a formal letter of demand, because legal fees would quickly exceed the debt. Small claims courts often don’t award legal costs even to the winner. That gives you real room to negotiate a fair plan.
The fix can create a second error. Our accountants see payroll corrections run through the wrong payroll category, which throws out tax and super figures. After any correction, check your next payslip and your end-of-year income statement. Tax and super should match what you should have been paid.
Timing is a red flag. When an employee is let go soon after disputing a deduction, our lawyers warn employers about general protections exposure. That warning exists because the law protects you. Keep a dated record of when you raised concerns.
Consent isn’t forever. Advisers regularly point out that an employee’s right to withdraw a written deduction authorisation is built into the Fair Work Act. If you signed one in a rush, you can revoke it in writing and renegotiate.
Frequently asked questions
Do I have to pay back money if I’ve been overpaid by my employer?
Usually, yes. A mistaken payment is a debt your employer can recover, even if the error was theirs. You do get a say in how it’s repaid, and your employer can’t deduct it from your wages without proper authorisation.
Is keeping an overpayment theft in Australia?
Spending money you didn’t know was a mistake isn’t theft. Deliberately keeping it once you know it isn’t yours can be an offence. In NSW, fraudulent appropriation carries up to two years’ imprisonment. Most employers treat it as a civil debt, but ignoring them is a bad idea.
Can my employer take the overpayment out of my next pay?
Not without your written authorisation for a specified amount, or a clause in your award or enterprise agreement that allows it. A general clause in your employment contract won’t cover it on its own. Unauthorised deductions can be reported to the Fair Work Ombudsman.
I was overpaid by work and it’s not my fault. Do I still owe it?
Yes, fault doesn’t cancel the debt. It does strengthen your case for affordable instalments. In narrow cases, a “change of position” defence can reduce what you repay if you relied on the money in good faith in a way you can’t reverse.
Do I repay the gross or net amount?
If the overpayment is found in the same financial year it happened, you repay the net amount you received. If it’s found in a later financial year, you repay the gross amount and amend that year’s tax return to recover the tax.
How long does my employer have to claim back an overpayment?
The limitation period for recovering mistaken payments is six years in most Australian states and territories. After that, your employer is likely out of time. The clock generally runs from when the payment was made.
Can I be sacked for questioning an overpayment deduction?
No. Questioning your pay or disputing a deduction is a workplace right, and dismissing you for it is adverse action. If it happens, you have 21 days to lodge a general protections claim with the Fair Work Commission.
What if I can’t afford to repay it all at once?
Propose instalments you can genuinely manage and get the plan in writing. You’re entitled to refuse a plan that causes hardship. For small amounts, employers rarely go to court, so a reasonable offer is usually accepted.
What if I’ve already left the job?
You may still owe it, but your former employer can’t deduct it from your final pay without proper authorisation. Ask for the calculation in writing, check it against your payslips, and negotiate a repayment plan the same way you would as a current employee.
Your next step
Being overpaid by your employer feels awkward, but it’s one of the most fixable problems at work. You didn’t do anything wrong by being paid. You’re not in trouble for asking questions. And once there’s a fair plan on paper, this becomes a line item, not a worry.
If the amount is large, disputed, or your employer has already started deducting, get a second pair of eyes on it before you sign anything. Book a consultation with an employment lawyer through Lawpath for fast, fixed-price advice on your overpayment.
