Underpaying Employees in Australia: The Penalties, the Interest, and the Risk to You as a Director

What actually counts as an underpayment?

An underpayment is simply paying an employee less than their legal minimum, the rate and entitlements set by the relevant modern award, an enterprise agreement, or the National Employment Standards. Here is the part that surprises people: most underpayments are not dodgy employers cutting corners. They are honest errors in a genuinely complicated system, made by business owners who thought they were doing the right thing.

The award system in Australia is intricate, and it is where almost all of this starts. The usual culprits look like this:

• Wrong classification. An employee is paid at a lower award level than their role and experience actually warrant.
• Missed penalty rates and allowances. Weekend, evening and public holiday loadings, or industry allowances like travel, tools, laundry or first aid, simply never get applied.
• Casual loading applied incorrectly, or a part-time employee treated as casual to sidestep leave.
• Annualised salaries that are never reconciled. A salary that looked generous when it was set can fall short of what the award would have paid once overtime and penalties are counted, and the law requires that reconciliation each year.
• Unpaid overtime, or SCHADS Award shift types such as sleepovers and broken shifts flattened into ordinary hours.
• Superannuation paid on the wrong earnings base, or paid late.

The reason underpayments become so dangerous is compounding. A small error of a few dollars a shift feels trivial. Multiply it across every pay, every affected employee, and up to six years, and a trivial-looking mistake becomes a five or six figure liability. That is not a scare story, it is simple arithmetic, and it is exactly why the small stuff matters.

How do underpayments actually get uncovered?

Here is the sentence every employer should sit with: it usually is not an audit that catches an underpayment, it is one employee. Most underpayments come to light because a single current or former staff member works out they have been short-changed and says something. You do not get to choose when that happens, and you cannot un-ring the bell once it does.

The specific ways it surfaces are worth knowing, because each one is something you can get ahead of:

• A report to the Fair Work Ombudsman. Anyone can make one, and it can be anonymous. A departing employee who googles their award, or a current one who compares notes with a mate in the same industry, is all it takes. The Fair Work Ombudsman publishes the award pay rates, so checking is easy.
• ATO data-matching. Single Touch Payroll reports every pay to the ATO, and the ATO data-matches super against it. Short or late super now shows up almost automatically, no complaint required.
• Fair Work proactive audits and campaigns. The regulator runs targeted audits by industry and region, and underpayment is a stated enforcement priority.
• A new hire, or a payroll review. A new employee negotiating their rate, or a new bookkeeper reviewing the file, frequently uncovers a historical error nobody had spotted.

The honest takeaway: you cannot rely on never being noticed, because you do not control the trigger. The only reliable protection is getting the pay right in the first place.

How is interest calculated on top of the back-pay?

Back-paying the shortfall is only the starting point. On top of it, interest can apply, and because it accrues over time, the bill grows the longer the problem sits unfixed. There are two separate streams, and they work differently.

The detail will vary with the case and the period, and the super rules in particular changed with Payday Super, so the figures should always be confirmed for your situation. The principle, though, does not change: time is the enemy. The same underpayment discovered and fixed this quarter costs far less than the same one found in three years, because the interest clock has been running the whole time. The ATO sets out how the charge is built in its super guarantee charge guidance.

What are the penalties for underpaying staff?

There are two tiers, and the line between them is intention. Honest mistakes sit in the civil tier; deliberate underpayment can now be criminal.

A few things are worth saying plainly. First, honest mistakes are not a crime. The criminal underpayment offence that commenced on 1 January 2025 targets intentional conduct, so a genuine award-interpretation error does not land you in prison. Second, small businesses have a specific shield: by following the Voluntary Small Business Wage Compliance Code, an employer who did not intend to underpay cannot be referred for criminal prosecution. Third, civil exposure continues regardless, and the Fair Work Ombudsman has secured record court penalties in recent years, so the civil tier is not a soft option. The clear message from the regulator is that coming forward and fixing errors is treated very differently from hiding them.

What is your personal risk as a director or manager?

This is the part most owners do not see coming: an underpayment is not only the company's problem. You can be personally on the hook, and a company structure does not automatically protect you.

• Accessorial liability. Under the Fair Work Act, a person who is "involved in" a contravention can be held personally liable and penalised, separately from the business. That net is wide: it has captured directors, managers, HR staff and even external advisers and accountants. You can read how the regulator pursues this on the Fair Work Ombudsman's litigation page.
• The criminal offence reaches individuals. A director or manager who intentionally directs or causes an underpayment can face the individual offence, with its prison term and personal fines.
• Unpaid super follows you. The ATO can pursue a company's unpaid super guarantee charge from directors personally through a Director Penalty Notice. That is a direct, personal debt.
• Reputation and duties. Beyond the dollars, a public underpayment finding does lasting brand damage, and it can raise questions about whether directors met their duties.

None of this is meant to frighten you into paralysis. It is meant to make one point clearly: because the risk is personal, getting payroll right is not an optional back-office nicety. It is directly protecting you.

How do you prevent underpayments?

The good news is that prevention is almost entirely within your control, and it is far cheaper than the cure. Here is what actually works:

• Classify every employee correctly under the right award and level, and review it when roles change.
• Build the award into your payroll software. Map pay items, penalty rates, allowances, loadings and overtime accurately in Xero so the right amounts are applied every pay, not guessed.
• Reconcile annualised salaries every year against what the award would have paid, and top up any shortfall. This is a legal requirement, not an optional check.
• Pay super on time, every time. With Payday Super, the timing matters more than ever, and late super is expensive.
• Keep compliant records and payslips for the required period. Poor records are a separate breach, and they make defending yourself much harder.
• Stay current with award changes. Rates and rules change, often on 1 July, and a setup that was right last year can quietly drift out of compliance.
• Run a periodic pay audit, so you find any error yourself, on your terms, rather than through a complaint. The Fair Work Ombudsman's small business best practice guide is a good, independent reference.

If that list feels like a lot to stay on top of while also running the business, that is the honest reality of modern payroll, and it is exactly why many owners hand it to a specialist.

How a payroll partner protects you

This is the whole reason specialist payroll exists. At True Tally we keep the award interpretation current, review classifications as roles change, build and maintain the pay-item mapping in Xero, reconcile annualised salaries, lodge Single Touch Payroll correctly, and make sure super is paid on time, so the errors that become underpayments do not get a chance to start. Our team puts serious continuing professional education hours into payroll each year, with real depth in the trickier awards like SCHADS.

If you want the full picture of what award-compliant payroll involves, our payroll services page walks through it, and for care and disability employers our SCHADS Award payroll page goes deeper on the hardest award of all. You can also model the true, fully-loaded cost of a hire with our free employee cost calculator.

Worried your payroll might not be right, or just want peace of mind? Book a free call and we will talk it through, no judgment and no obligation. Prefer to read on? See our payroll services or the payroll tax by state guide.