How to Avoid and Fix Payroll Errors

Most payroll errors aren’t one dramatic mistake. They’re a small, recurring one that compounds because nobody checks the output against reality until something forces the issue. Avoiding payroll errors depends less on buying better software than on running a short set of checks every pay run — and once you find a mistake, fixing it properly means correcting the whole period it ran for, not just the current pay run. Payday Super, in force since 1 July 2026, makes both harder to put off.

This article contains general information only and isn’t personal financial or workplace relations advice. Every business is different, so if you’re unsure how the rules apply to your situation, speak with a registered BAS agent, your accountant or the Fair Work Ombudsman.

Key takeaways:

• Misclassification — the wrong award, the wrong classification level, or an employee treated as a contractor — is the most common and highest-impact payroll mistake, because it can run for months before anyone notices and it’s the error payroll software is least able to catch for you.
• From 1 July 2026, superannuation guarantee is paid each payday rather than quarterly, with a 7 business day deadline for the fund to receive it — this shifts payroll error risk from a quarterly event to a per-payday one.
• There’s no grace period for fixing a payroll error once it’s found. Back pay covers the full period the error ran, and individual pieces have their own deadlines — 14 days for most STP corrections, 7 business days for super under Payday Super.
• An employee can generally pursue an underpayment through the small claims process for up to 6 years after it happened, and payroll records have to be kept for 7 years — longer than the general 5-year tax record period.
• For an isolated, unintentional underpayment, correcting it usually means notifying the employee, back paying promptly and fixing the cause — though serious, systemic or deliberate conduct is a different matter, and deliberate underpayment can now carry criminal liability.
• Payroll software reduces calculation mistakes, but it won’t tell you if an award, classification or pay rate was set up incorrectly to begin with.
• A short, regular review process catches most payroll errors faster and cheaper than fixing them after they’ve compounded.

The most common payroll mistakes small businesses make

Before fixing anything, it helps to know what goes wrong most often:

• Wrong award, classification or pay rate applied to an employee, often from the start of employment.
• Missed or late superannuation guarantee payments, particularly around quarter-end (or now, payday) deadlines.
• Incorrect overtime, penalty rate or allowance calculations, especially for employees working variable or irregular hours.
• Leave accrual errors — annual leave, personal leave or long service leave calculated incorrectly over time.
• Termination payment mistakes — unused leave, notice period or redundancy pay miscalculated at the point an employee leaves.
• STP reporting out of sync with what was actually paid, usually from a manual adjustment made in one system but not the other.

Signs your payroll process needs a review

A few practical warning signs tend to show up before an error is found:

• Award and classification setups haven’t been reviewed since an employee was onboarded, even after pay rises or role changes.
• Pay slips are generated but rarely checked against timesheets.
• No one has reconciled SG obligations against employees’ ordinary time earnings (OTE) and the contributions actually paid since Payday Super started.
• Leave balances look “roughly right” but haven’t been checked against the award in a while.
• More than one person can adjust payroll, but no one person is responsible for reviewing it.

None of these guarantee an error exists, but they’re the conditions most errors grow in.

Why payroll errors happen in the first place

Payroll errors usually aren’t caused by carelessness. They’re more often the result of payroll settings gradually falling behind reality. Award rates change, employees move into new roles, junior employees reach a higher age-based pay rate, or someone applies a manual override that never gets removed. Individually they’re small changes, but over time they add up to costly mistakes.

More often than not, the original setup was correct. It just wasn’t updated as things changed.

One situation that comes up regularly: a casual employee is classified correctly when they start, then quietly reaches a higher age-based pay point six or twelve months later. Nobody notices until a payslip audit or an employee query flags it, by which point it’s a back-payment calculation rather than a five-minute fix.

The review process is much the same whether you have one café in Melbourne or employees across several states. Modern awards are national. The important part is making sure you’ve identified the right award in the first place — award coverage is often more specific than “hospitality” or “retail” as a general label. Hospitality, construction and healthcare in particular often have several awards or classifications that could plausibly apply to the same role, and picking the wrong one at the start is a common source of the errors above.

Payslip and record-keeping basics that prevent bigger problems

Getting the basics consistently right prevents most downstream errors. Employees generally need a pay slip within one working day of being paid, and employers need to keep time and wage records for 7 years. Checking pay slips against timesheets every pay run is one of the simplest controls you can have, and it catches most errors before they become recurring problems.

Superannuation guarantee errors: what to watch for

Missing or underpaying the Superannuation Guarantee (SG) is one of the costliest payroll errors. The super guarantee charge that applies if it’s not paid correctly is generally more than the SG you would have paid on time, and it isn’t tax deductible.

The Super Guarantee rate is 12% of an employee’s ordinary time earnings (OTE). Getting the OTE calculation wrong — missing an allowance that should be included, for example — is a common source of underpayment that isn’t always obvious until it’s checked properly.

New in 2026: how Payday Super changes the error risk

From 1 July 2026, Payday Super requires employers to pay SG contributions for each payday rather than quarterly, with the payment needing to reach the employee’s super fund within 7 business days after payday (20 business days for a new employee’s first contribution).

This shifts where payroll mistakes are most likely to happen. Many employers previously managed SG around quarterly payment deadlines; it now turns super from something you think about every quarter into something that needs attention every payday. A process that reliably caught a quarterly deadline may not automatically catch a weekly or fortnightly one without some adjustment. If your payroll software and process haven’t been reviewed since this change took effect, it’s worth reviewing them now instead of after the first missed deadline.

How to avoid misclassification fines using payroll software

Misclassification is where the largest payroll penalties sit, and it’s the one error payroll software is least equipped to catch on your behalf. It comes in two versions, and they fail in different ways.

The first is getting the classification level wrong within the right award. Award classifications are the descriptions of roles and duties usually set out towards the end of an award, and the classification is what determines the minimum rate. Put someone a level too low and every pay run is short by a consistent amount until it’s found.

The second is treating an employee as a contractor. This one never shows up in payroll at all, because a misclassified contractor is typically paid on invoice through accounts payable and never enters the payroll system. Our contractor vs employee guide covers the tests that apply now, including the whole-of-relationship test that took effect from 26 August 2024.

What the fines turn on

Fair Work penalties are set in penalty units and scale with how the conduct is characterised. Two features of the current regime matter for misclassification specifically:

• A serious contravention now covers conduct that was knowing or reckless, rather than the previous “knowing and systematic” threshold, and carries a substantially higher maximum penalty. Not having looked closely at a classification is a different position to having considered it and documented why.
• For underpayment contraventions, a court can impose a penalty calculated as a multiple of the underpayment itself — so a classification error that ran for two years produces a penalty that scales with how long it ran, not just with the fact it happened.

Separately, since 1 January 2025, intentionally underpaying an employee can be a criminal offence under Commonwealth law. Honest mistakes aren’t criminal — but the distinction between an honest mistake and a knowing one often comes down to what the employer can show they checked, and when.

What payroll software can and can’t do about classification

Using software so it genuinely lowers your risk

Software reduces misclassification risk only where a person feeds it correct decisions and checks the ones it can’t make:

1. Re-run the classification against the award’s classification schedule whenever duties change, not only at onboarding. A promotion or a change in responsibilities is the moment a correct classification becomes an incorrect one.
2. Check the rate your software produces against the relevant Fair Work pay guide at least once a year, after the annual wage review takes effect. This catches both a stale rate table and a wrong classification in one check.
3. List every manual override in the system and confirm each still has a reason to exist. Overrides sit on top of award interpretation and quietly defeat it.
4. Review anyone paid on invoice against the contractor tests, since payroll software will never raise them for you.
5. Keep a dated record of how each classification was decided — which award, which level, and on what duties. Where conduct is assessed against what an employer knew or reasonably believed at the time, that record is the evidence.

A practical checklist to avoid payroll errors each pay run

1. Check pay slips against timesheets each pay run, rather than assuming the software calculated everything correctly.
2. Revisit award and classification setups after any pay rate change, an employee reaching a new age-based pay rate under the award, or a role change.
3. Reconcile SG against ordinary time earnings (OTE) each pay period under Payday Super, rather than waiting for a quarterly review.
4. Spot-check leave accrual balances against the applicable award, enterprise agreement or NES entitlement, particularly for long-tenured employees.
5. Review termination calculations against the specific award, enterprise agreement or employment contract before finalising a final pay.
6. Reconcile STP reports against actual payments made, including employee income types and other STP Phase 2 information, to catch any manual adjustment that wasn’t reflected in the report sent to the ATO.

How to fix payroll errors: the correction process step by step

Knowing how to fix payroll errors properly means dealing with three separate things: the money, the reporting, and the setup that produced it. Leaving any one of them undone leaves the problem live.

1. Work out how far back it goes before touching the current pay run. A wrong rate today was almost certainly wrong last pay run, and the period is what determines the size of the correction.
2. Recalculate what should have been paid across the whole period, against the award or agreement rates in force at the time. A two-year-old underpayment isn’t the current rate multiplied by the number of pay runs — rates changed part way through.
3. Back pay wages and superannuation. The general position is that you back pay the employee so they receive everything they were owed, including super on the corrected amount, not only the wages.
4. Correct the STP reporting. The ATO’s guidance on correcting information reported through STP generally expects a fix within 14 days of identifying the need for a correction, or in the next regular pay event where the employee has continuity of employment in the same financial year. This is the step most often skipped, and it’s the one that leaves ATO figures disagreeing with what was paid.
5. Tell the employee in writing — what was wrong, the period it covered, how the amount was calculated, and when it will be paid. A back payment that arrives without explanation tends to generate more questions than it settles.
6. Fix the underlying setup, whether that’s the award, the classification, an override, or a step in the process nobody was responsible for.
7. Decide whether the situation needs more than a correction. There’s no general legal requirement to report every isolated underpayment, and for an isolated, unintentional error employers will generally correct it, notify the employee and move on. If it’s serious, systemic or deliberate, it’s worth getting professional advice or contacting the Fair Work Ombudsman before acting.
8. Document the whole thing — what happened, how the amount was calculated, when it was fixed, and what changed so it doesn’t recur.

Employers who identify a genuine mistake, fix it quickly and communicate openly are viewed very differently from those who only act once someone else discovers the problem.

How long does an employer have to fix a payroll error in Australia?

There’s no grace period that lets an employer sit on a payroll error once it’s known. The general position is that the employee is back paid everything they’re owed as soon as possible, covering the full period the error ran — not from the date it was discovered.

Individual parts of the correction do have their own timing:

• Underpaid wages — no fixed statutory deadline for the correction itself, but the expectation is that back pay is made as soon as possible once the error is identified.
• Superannuation — under Payday Super, contributions need to reach the employee’s fund within 7 business days of payday. Once they’re late, the super guarantee charge applies regardless of when you catch up.
• STP reporting — generally within 14 days of identifying the need for a correction, or in the next regular pay event.
• Pay slips — within one working day of paying the employee, which is why a reissued pay slip should accompany a back payment rather than follow it later.

A related but different question is how far back a claim can reach. An employee can generally apply through the small claims process for up to 6 years after the contravention, and time and wage records have to be kept for 7 years — so the records needed to assess an old underpayment usually still exist. Nothing about the passage of time makes a payroll error go away. It only makes the back payment larger.

There’s also a compliance dimension to delay that’s easy to miss. Because a serious contravention now covers conduct that was knowing or reckless, continuing to pay incorrectly after you’ve identified the problem is a materially worse position than the original error. Discovering an underpayment and taking a few weeks to calculate it properly is reasonable. Discovering one and leaving the setting unchanged for six months is not.

Common mistakes when correcting payroll errors

• Correcting the current pay run without checking how far back the error goes. A wrong pay rate found today was probably wrong last pay run too.
• Fixing the payment but not the underlying setup. If the award or classification that caused the error isn’t corrected, the same mistake repeats next pay run.
• Treating software as a substitute for a review process. Well-configured software still needs checking from time to time — it will calculate an incorrect setup perfectly consistently.
• Not documenting the correction. Keeping a clear record of the issue, the correction made and when it was fixed matters both for your own records and if the error is ever queried later.

Can payroll software alone prevent payroll errors?

Not entirely. Modern payroll software, combined with Single Touch Payroll reporting, removes a lot of manual calculation and reporting risk — but it can’t catch an award that was set up incorrectly from the start, an employee who was never reclassified after a role change, or a manual override that was meant to be temporary and never got reverted.

Good payroll software reduces mistakes. It doesn’t replace someone making sure the payroll is right. Even where software includes award interpretation features, the employer remains legally responsible for paying employees correctly — the software is a tool, not a transfer of that responsibility.

In-house vs outsourced payroll: which reduces errors more reliably

For a small number of employees on a single, well-understood award, in-house payroll with good software and a consistent review habit is often perfectly manageable. Once payroll becomes more complex — with multiple awards, different employment types or frequent staffing changes — having another experienced set of eyes often pays for itself quickly.

Getting help with payroll accuracy

If you’ve already found payroll errors, fixing the current pay run is only part of the job. You also need to work out how far back the error goes and fix the setup that caused it. Our payroll services page covers ongoing payroll support, including staying current with changes like Payday Super. If the error came from a classification decision rather than a calculation, our contractor vs employee guide walks through the tests that apply. And if payroll errors have flowed through to inaccurate BAS figures, our guide to overdue BAS lodgements covers what to do if lodgements have also fallen behind as a result.

If you run a café, restaurant or venue, the errors above tend to cluster differently — around award coverage, split shifts, missed meal breaks and annualised salaries. Our guide to payroll challenges in hospitality covers those specifically.

Official resources

• Pay slips — Fair Work Ombudsman
• Record-keeping — Fair Work Ombudsman
• I think I’ve underpaid my employee — Fair Work Ombudsman
• Award classifications — Fair Work Ombudsman
• Pay guides — Fair Work Ombudsman
• Litigation and penalties — Fair Work Ombudsman
• Criminalising wage underpayments and other issues — Fair Work Ombudsman
• About the small claims court — Fair Work Ombudsman
• About Payday Super — ATO
• Payment deadlines for Payday Super — ATO
• What happens if you don’t pay super correctly — ATO
• Single Touch Payroll — ATO
• Correcting information reported through STP — ATO