ATO Shortfall Penalties: Understanding the 25%, 50% and 75% Bands and How to Manage Them

When the ATO issues an amended assessment with a shortfall penalty attached, you’re not just looking at additional tax. You’re looking at the ATO’s view of your business’ conduct.

That view matters. It influences everything: how much you pay, how the ATO treats you in future audits, and how the dispute unfolds if you decide to challenge the underlying position.

And here’s what most businesses miss: the difference between a 25% penalty and a 75% penalty isn’t just numbers. It’s the difference between “you made a mistake” and “you deliberately ignored the rules”. One of those labels costs you money. The other one damages reputation and sets a precedent.

So when you receive that amended assessment, don’t just look at the dollar figure. Look at how the ATO has characterised your behaviour. Because if they’ve got it wrong, you need to know how to push back.

What is an ATO shortfall penalty and when does it apply?

A shortfall penalty is the ATO’s way of penalising incorrect tax positions. It’s not about making an honest mistake. It’s about the conduct that led to the mistake.

The mechanics are straightforward. When the ATO reassesses your tax and determines you underpaid, the difference between what you should have paid and what you actually paid is the “shortfall amount”. That’s the starting point.

The penalty is a percentage of that shortfall. The percentage depends on how the ATO categorises your behaviour: 25%, 50%, or 75%.

Think of it this way: if your company underpaid tax by $200,000, and the ATO says you failed to take reasonable care, you’re looking at a $50,000 penalty (25%). If they say it was reckless, that’s $100,000 (50%). Intentional disregard? $150,000 (75%).

Those aren’t just administrative charges. They’re judgments about how your business handled its tax obligations.

And they stack. On top of the penalty, you’ll pay the shortfall itself, plus General Interest Charge on both. So that $200,000 mistake becomes $250,000, $300,000, or $350,000 before interest.

Shortfall penalties are distinct from other ATO penalties. Administrative penalties for failing to lodge returns or pay on time are fixed amounts based on penalty units. Shortfall penalties scale with the size of the error and the ATO’s view of your conduct.

They apply when you’ve made a statement that’s false or misleading, resulting in a tax shortfall. That covers most scenarios: incorrect returns, overstated deductions, understated income, failed transfer pricing positions. If there’s a gap between what you declared and what the law required, and the ATO thinks your behaviour warranted a penalty, they’ll apply one.

The critical point: shortfall penalties aren’t inevitable. Small errors, genuine mistakes based on proper advice, and positions that were genuinely arguable often don’t attract penalties at all. But once the ATO decides to impose one, the behaviour label they choose shapes the entire dispute.

How the 25%, 50% and 75% bands work in practice

The penalty rates aren’t arbitrary. They correspond to three levels of culpability: carelessness, recklessness, and intentional wrongdoing. The ATO’s guidance describes them in terms of behaviour, not intent, which means how you acted matters more than what you meant to do.

Failure to take reasonable care: 25%

This is the lowest band. It covers situations where you should have done more to get the position right, but there’s no suggestion you were reckless or deliberately ignoring the law.

The ATO describes it as failing to exercise the care a reasonable person in your circumstances would take. That’s broad, and intentionally so. It captures mistakes that stem from inadequate record-keeping, insufficient attention to detail, or not seeking advice when you should have.

Examples:

• You claimed deductions without verifying whether expenses were genuinely business-related.
• You relied on rough estimates instead of obtaining proper documentation.
• You misunderstood a straightforward tax rule without making any real effort to clarify it.
• You received advice but failed to give your adviser all the relevant facts.

The 25% band assumes you weren’t trying to cheat the system. You just didn’t meet the standard of care expected of someone running a business or managing financial affairs.

That distinction matters. If the ATO’s assessment says “failure to take reasonable care”, you can often negotiate or seek remission on the basis that internal processes were sound, the error was isolated, or you acted promptly once you discovered it.

Recklessness: 50%

This is where the ATO says you knew there was a real risk your position was wrong, but you went ahead anyway. Recklessness means disregarding an obvious risk. It’s not about making a mistake. It’s about choosing not to check when you knew you should.

The ATO looks for situations where warning signs were ignored. You had doubts, or should have had doubts, but you pressed ahead without clarifying or seeking advice.

Examples:

• You took an aggressive tax position without confirming it was supportable, and there was clear uncertainty about whether it worked.
• You received advice that highlighted risks or limitations, but you ignored those qualifications.
• You knew the law or practice had changed in a way that affected your position, but you didn’t adjust your approach.
• You relied on advice that was clearly incomplete or based on assumptions you knew were wrong.

A 50% penalty is a serious escalation. It suggests the ATO doesn’t believe your explanation that this was an innocent mistake. And because “recklessness” sounds deliberate to non-lawyers, it carries reputational weight. Boards and investors hear that label and start asking hard questions about governance.

If you’re facing a 50% penalty, it’s worth challenging the behaviour characterisation. Often, what the ATO calls recklessness can be reframed as a failure to take reasonable care, particularly if you can show you sought advice, documented your reasoning, or acted consistently with accepted industry practice.

Intentional disregard: 75%

This is the top of the scale. The ATO is saying you knew the law and chose to ignore it. Not because you misunderstood, not because you were careless, but because you made a deliberate decision to disregard your obligations.

Intentional disregard doesn’t require proof you intended to defraud the ATO. It just requires proof you knew what the law said and consciously decided not to follow it. The focus is on your conduct, not your motive.

Examples:

• You knew a deduction wasn’t allowable but claimed it anyway.
• You deliberately understated income or overstated losses.
• You structured transactions with no commercial purpose, purely to avoid tax.
• You ignored clear advice that a position was wrong and proceeded regardless.

A 75% penalty is the ATO’s harshest judgment. It’s not something you accept without a fight. If you’re accused of intentional disregard, the onus is on the ATO to prove it. That means showing you had actual knowledge of the relevant law and made a conscious choice to ignore it.

Many 75% penalties arise in audits where the ATO sees patterns: repeated claims of the same incorrect deduction, deliberate omissions across multiple years, or transactions that look contrived. But sometimes they’re applied where the conduct doesn’t warrant that label, and those cases are worth contesting.

How the base penalty is calculated

The formula is simple: shortfall amount × penalty rate.

If your company underpaid $500,000 in tax, and the ATO says you failed to take reasonable care, the base penalty is $500,000 × 25% = $125,000. If they say it was reckless, it’s $250,000. Intentional disregard? $375,000.

But that’s just the starting point. The base penalty can be increased or reduced depending on other factors, and it can be remitted entirely if the circumstances justify it.

How the ATO decides which behaviour applies

The ATO doesn’t just pick a penalty rate at random. There’s a process. Auditors are trained to assess behaviour based on what you did, what you knew, and what you should have known.

The question they’re answering: did this taxpayer meet the standard of care expected of them? And if not, how far below that standard did they fall?

Here’s what the ATO actually looks at.

What information did you have?

The ATO will reconstruct what you knew at the time you prepared your return or took the tax position. They’ll review internal emails, board minutes, advice you received, and any documents that show your decision-making process.

If you had clear information suggesting your position was wrong, and you ignored it, that points toward recklessness or intentional disregard. If you acted on incomplete information, or made a reasonable assumption based on what you knew, that leans toward reasonable care.

This is why documentation matters. If you can show you sought advice, reviewed the relevant law, and made a considered decision, you’re in a stronger position. If there’s no record of any due diligence, the ATO will assume you didn’t do any.

Did you seek and follow advice?

Getting advice from a registered tax agent or lawyer helps. But it’s not a shield. The ATO’s guidance is clear: using an agent doesn’t automatically mean you took reasonable care.

What matters is whether you gave your adviser complete and accurate information, and whether you followed the advice you received. If you withheld key facts, cherry-picked favourable opinions, or ignored qualifications and caveats, the ATO won’t accept “I relied on advice” as a defence.

Conversely, if you briefed your adviser properly, asked the right questions, and implemented their recommendations, that’s strong evidence of reasonable care.

The practical point: your files need to show what you told your adviser, what they told you, and how you applied their advice. If those dots don’t connect, you’re vulnerable.

Did you check your return or position before lodging?

Directors and senior managers can’t just sign off on returns without reviewing them. The ATO expects you to apply a basic level of scrutiny: do the numbers look right, are the claims consistent with what you know about the business, have any unusual or aggressive positions been properly vetted?

If you lodge a return with glaring errors, large one-off deductions, or positions that contradict prior years’ treatment, and you didn’t question any of it, the ATO will say you failed to take reasonable care.

This doesn’t mean you need to be a tax expert. But it does mean you can’t be passive. If something doesn’t make sense, or if you’re claiming deductions that feel borderline, you’re expected to ask questions before lodging.

What systems and controls did you have in place?

Larger businesses face higher expectations. If you’re a mid-market company with a finance team and external advisers, the ATO expects robust processes: documented policies, regular reviews, segregation of duties, and escalation protocols for uncertain positions.

If those systems are missing, or if they exist on paper but aren’t followed in practice, the ATO will view that as a failure to take reasonable care. For more serious errors, it can push the behaviour into the recklessness category.

For smaller businesses, the standard is lower, but not zero. Even sole traders are expected to keep proper records and make reasonable efforts to understand their obligations.

Did you disregard obvious warning signs?

This is the line between carelessness and recklessness. If there were clear indicators your position was wrong, and you chose not to investigate further, the ATO will treat that as reckless.

Warning signs include:

• Advice that raised concerns or flagged risks.
• Changes in the law or ATO practice that affected your position.
• Audit findings or objection decisions in related areas.
• Industry guidance or professional commentary suggesting your approach was non-standard.

If you knew about any of these and didn’t adjust your position, that’s hard to defend. If you can show you weren’t aware, or that you took steps to check and still got it wrong, you’re more likely to land in the 25% band.

Was the position reasonably arguable?

This is a technical concept, but it matters. If your tax position was “reasonably arguable”, the ATO generally won’t apply a shortfall penalty at all.

A position is reasonably arguable if it’s about as likely to be correct as incorrect, based on the relevant law and facts. It doesn’t have to be right. It just has to be defensible.

If you took a position that was borderline, but you documented your reasoning, sought advice, and acted in good faith, you can argue the position was reasonably arguable. Even if the ATO ultimately disagrees with the position, that doesn’t mean it was reckless or careless to take it.

This is one of the most effective ways to avoid penalties entirely. But you need to be able to show your reasoning at the time, not reconstruct it later.

Reductions for voluntary disclosure and other mitigating factors

The base penalty rate is the starting point, not the final number. The ATO has power to reduce penalties, and in some cases eliminate them entirely, depending on your conduct after the error occurred.

The biggest reduction comes from voluntary disclosure. If you discover a mistake and tell the ATO before they find it, you can cut the penalty by up to 80%. That’s a material difference: a $100,000 penalty becomes $20,000.

But there are conditions. Not every disclosure qualifies as voluntary, and not every voluntary disclosure gets the full 80% reduction.

What counts as voluntary disclosure

Voluntary disclosure means telling the ATO about an error before they’ve started inquiring into it. The key word is “before”. Once the ATO has contacted you about an audit, or sent you a position paper, or flagged an issue in any way, your disclosure isn’t voluntary anymore.

The timing threshold is strict. If you lodge an amended return the day before the ATO’s audit letter arrives, that’s voluntary. If you lodge it the day after, it’s not.

The disclosure also needs to be complete. You can’t cherry-pick. If you’re disclosing one error, you need to disclose all related errors in the same return or across the same period. Partial disclosure doesn’t count.

And it needs to be proactive. Simply responding to an ATO question by admitting an error isn’t voluntary disclosure. You need to identify the problem yourself and bring it to the ATO’s attention.

How much reduction you actually get

If your disclosure is truly voluntary, the ATO will reduce the base penalty by 80%. A 25% penalty drops to 5%, a 50% penalty drops to 10%, a 75% penalty drops to 15%.

But if the disclosure happens after the ATO has already started looking, the reduction is only 20%. So a 25% penalty becomes 20%, a 50% penalty becomes 40%, and a 75% penalty becomes 60%. You still get a reduction, but it’s far less generous.

There’s also a threshold for small shortfalls. If the shortfall amount is less than $1,000 and you make a voluntary disclosure, the penalty can be reduced to nil. That’s a complete waiver. For shortfalls between $1,000 and $10,000, the ATO has discretion to reduce penalties below the standard formula.

These aren’t automatic. You need to request the reduction and explain why it’s warranted. But if you meet the criteria, the ATO will generally apply them.

Other factors that can reduce penalties

Beyond voluntary disclosure, the ATO can reduce penalties if:

• The error was a genuine misunderstanding of complex or ambiguous law, and you took reasonable steps to get it right.
• You relied on advice that turned out to be wrong, and it was reasonable for you to rely on that advice.
• You have a strong compliance history and this is the first time you’ve been penalised.
• The shortfall arose from circumstances beyond your control, such as a systems failure or reliance on incorrect information from a third party.
• You cooperated fully during the audit and took prompt steps to correct the error once it was identified.

The ATO’s guidance says penalties can be reduced where it’s “fair and reasonable” in the circumstances. That’s deliberately open-ended. It gives the ATO discretion to take a pragmatic view if you can show your conduct wasn’t as blameworthy as the base penalty suggests.

When penalties can be increased

It works both ways. The ATO can also increase penalties if there are aggravating factors. The most common is repeated behaviour. If you’ve made the same mistake in multiple years, or if you’ve been penalised before for similar conduct, the ATO can increase the penalty by up to 20%.

Another trigger is obstruction. If you hinder the audit, refuse to provide documents, or give false or misleading information during the investigation, the ATO can increase the penalty.

For significant global entities (large multinationals), the base penalty rates double. A 25% penalty becomes 50%, a 50% penalty becomes 100%, and a 75% penalty becomes 150%. This reflects the ATO’s view that large, sophisticated taxpayers should be held to a higher standard.

Remission: what discretion the ATO has and how it’s exercised

Reductions based on voluntary disclosure or mitigating factors are formula-based. Remission is different. It’s a discretionary decision by the ATO to reduce or waive the penalty entirely, even if the formula says you owe it.

Remission is not automatic. You have to ask for it. And you need to provide evidence and reasons explaining why your circumstances justify the ATO exercising discretion in your favour.

The legal framework

The ATO’s power to remit penalties comes from the Taxation Administration Act. The test is whether remission is “fair and reasonable” in the circumstances. That’s a broad, fact-specific judgment. There’s no exhaustive list of what qualifies, but the ATO’s internal guidance and published decisions give a sense of what works.

Remission can be full or partial. The ATO can waive the penalty completely, or reduce it to a figure lower than the formula would produce. It depends on how strong your case is.

What the ATO looks at when considering remission

The ATO will consider:

• Whether you acted in good faith and made a genuine attempt to comply.
• Whether the error arose from circumstances outside your control.
• Whether you have a strong compliance history with no prior penalties or defaults.
• Whether you cooperated fully during the audit and took immediate steps to correct the error.
• Whether imposing the penalty would cause serious financial hardship.
• Whether there were extenuating circumstances, such as serious illness, natural disaster, or reliance on incorrect advice from the ATO itself.

None of these factors guarantee remission. But if you can point to several of them, your request is more likely to succeed.

How to request remission

Remission isn’t something the ATO offers. You need to formally request it, usually in writing, and set out the reasons and evidence supporting your case.

The request should be clear and structured:

• Acknowledge the shortfall and the penalty.
• Explain the circumstances that led to the error.
• Set out the factors that justify remission: voluntary disclosure, compliance history, reliance on advice, cooperation, hardship, or other extenuating circumstances.
• Provide supporting evidence: board minutes, advice files, financial statements, correspondence with advisers, anything that corroborates your explanation.

The tone matters. This isn’t an objection where you’re challenging the ATO’s decision. It’s a request for discretion. You’re asking the ATO to take a pragmatic view based on the facts and your conduct.

If your remission request is refused, you can escalate it internally within the ATO, or ultimately seek review through the courts. But those options are expensive and slow. Most remission discussions are resolved at the caseworker or team leader level.

When remission is likely to succeed

Remission works best when:

• You made a genuine effort to comply and the error was an outlier, not a pattern.
• You discovered the mistake yourself and disclosed it promptly.
• You sought and followed professional advice, but the advice turned out to be wrong for reasons outside your control.
• The penalty would create real financial hardship, particularly if it threatens the viability of the business.
• You can show clear evidence of robust internal processes and controls, and the error slipped through despite those safeguards.

Conversely, remission is unlikely if:

• You ignored warning signs or advice.
• You’ve been penalised for similar conduct before.
• You obstructed the audit or provided incomplete information.
• The error was large, deliberate, or part of a pattern.

Remission vs challenging the underlying assessment

Remission is separate from objecting to the tax assessment itself. You can request remission even if you agree the tax position was wrong. And you can object to the assessment while also seeking remission of the penalty.

In many disputes, both tracks run in parallel. You challenge the primary tax liability because you think the ATO’s interpretation is wrong, and you also argue that even if the ATO is right about the tax, the penalty should be reduced or waived.

The strategic point: don’t treat penalties as a given. Even if you lose on the substantive tax issue, you can still win on penalty remission.

Reading and responding to a penalty assessment

When an amended assessment lands with a shortfall penalty attached, most businesses focus on the tax. That’s natural: the tax is the big number. But the penalty matters just as much, and in some cases more.

Here’s what to do when you receive one.

Step one: understand what the ATO is saying

Read the assessment notice carefully. It will set out:

• The shortfall amount (the difference between the tax you paid and the tax the ATO says you should have paid).
• The penalty rate (25%, 50%, or 75%).
• The behaviour category (failure to take reasonable care, recklessness, or intentional disregard).
• The base penalty amount (shortfall × penalty rate).
• Any reductions or increases applied (e.g. for voluntary disclosure or repeated behaviour).
• The final penalty payable.

The behaviour category is the most important part. That’s the ATO’s view of your conduct. If they’ve got it wrong, challenge it now. Don’t wait until you’re deep into an objection or litigation to raise it.

Step two: check the facts

Cross-check the ATO’s position against your own records. Do they have the shortfall amount right? Have they correctly characterised your behaviour? Have they given you credit for voluntary disclosure if you made one?

Mistakes happen. Sometimes the ATO applies the wrong penalty rate because they misunderstood the facts. Sometimes they fail to apply reductions they should have. And sometimes they base their view of your behaviour on incomplete information.

If the facts are wrong, you can correct them before the dispute escalates.

Step three: review the advice and processes you followed

Go back to the files. What advice did you receive at the time you took the position? Did you follow that advice? Did you give your adviser all the relevant facts? Did you document your decision-making?

If you can show you took reasonable steps, that’s your best defence against a 50% or 75% penalty. If the files are thin, that’s a problem. But even then, witness statements from the people involved can help reconstruct what happened.

Step four: decide whether to challenge the behaviour characterisation

If the ATO has labelled your conduct as reckless or intentional disregard, and you don’t think that’s fair, say so. You can request a review of the penalty decision, or include it as part of a broader objection to the assessment.

The burden is on the ATO to prove the behaviour category they’ve applied. If they can’t, the penalty should be reduced to the next band down, or waived entirely if the position was reasonably arguable.

This is where professional advocacy makes a difference. The ATO won’t just accept your assertion that you acted reasonably. You need to present evidence and argument in a structured, persuasive way.

Step five: consider remission

Even if the behaviour category is correct, you can still seek remission. Put together a submission explaining why the circumstances justify reducing the penalty. Include all the mitigating factors: voluntary disclosure, compliance history, reliance on advice, cooperation, hardship.

Remission requests are most effective when they’re made early, before the matter escalates to formal dispute. Once you’re in litigation, the ATO’s willingness to negotiate on penalties drops.

Step six: understand the cashflow impact

Don’t just look at the penalty in isolation. Factor in the underlying tax, General Interest Charge on both the tax and the penalty, and the cost of disputing the assessment if you decide to object.

If the total exposure is material, you may need to notify your bank, investors, or board. Penalties can trigger covenant breaches, affect working capital, and require disclosure in financial statements.

The practical point: treat this like any other significant financial risk. Quantify it, model different scenarios (what if you win, what if you lose, what if you settle), and make decisions based on informed risk assessment.

Step seven: get advice early

Penalty disputes are technical. The line between reasonable care and recklessness, the evidence required to support remission, the process for challenging the ATO’s decision, these aren’t things you want to figure out on the fly.

If the penalty is large, or if the behaviour characterisation is damaging, bring in someone who knows how these disputes work. Early advice can mean the difference between a manageable reduction and a full-blown tax litigation.

Penalty risk for larger and complex groups

The compliance expectations for mid-market and large businesses are materially higher than for small operators. The ATO assumes you have the resources, expertise, and systems to get things right. If you don’t, the penalties reflect that.

Significant global entities: double penalties

If your group is a significant global entity (broadly, consolidated revenue of A$1 billion or more), the penalty rates double. A 25% penalty becomes 50%, a 50% penalty becomes 100%, and a 75% penalty becomes 150%.

That’s not a drafting error. The ATO’s policy is that large multinationals should be held to the highest standard. If you’re operating at scale, with access to sophisticated advisers and robust systems, there’s less tolerance for mistakes.

This doesn’t just apply to pure tax disputes. It also applies to transfer pricing adjustments, thin capitalisation breaches, and other international tax issues. If the ATO recharacterises a related-party transaction and determines there’s a shortfall, the penalty can exceed the underlying tax adjustment.

For groups in this category, penalty risk is a board-level issue. A single audit adjustment can result in penalties in the tens of millions. That requires governance frameworks that treat tax risk with the same rigour as financial reporting or operational risk.

What “reasonable care” looks like for larger groups

The ATO expects:

• Documented tax policies and risk management frameworks.
• Regular reviews of uncertain tax positions and contingent liabilities.
• Clear escalation protocols for material or complex transactions.
• Engagement with external advisers on high-risk areas.
• Board or audit committee oversight of tax strategy and compliance.

If those systems exist on paper but aren’t followed in practice, the ATO will treat that as a failure to take reasonable care. If they don’t exist at all, the behaviour can quickly escalate to recklessness.

The practical implication: internal controls matter. The ATO will ask to see your tax governance documents during an audit. If you can’t produce them, or if they’re superficial, you’re vulnerable.

Cross-border complexity and transfer pricing

Transfer pricing disputes are fertile ground for shortfall penalties. If the ATO adjusts your related-party pricing and determines there’s a shortfall, they’ll also assess whether you took reasonable care in setting and documenting your pricing methodology.

The standard for “reasonable care” in transfer pricing is high. The ATO expects:

• Contemporaneous transfer pricing documentation.
• Analysis of comparable transactions or entities.
• Regular review of pricing policies to ensure they remain arm’s length.
• Advice from specialists where the transactions are complex or material.

If you relied on outdated documentation, failed to update your policy when circumstances changed, or applied pricing that was clearly outside the arm’s length range, the ATO will apply penalties.

And because the shortfall amounts in transfer pricing cases can be very large, even a 25% penalty can run into millions of dollars.

When to treat penalties as a governance issue

If your group is large or complex, penalties aren’t just a tax technical issue. They’re a signal to the board, auditors, and regulators about the quality of your tax governance.

A penalty assessment, particularly one alleging recklessness or intentional disregard, will trigger questions:

• Are our tax risk processes adequate?
• Did management escalate this issue appropriately?
• Do we have the right expertise in-house or on external advisory panels?
• Should we be conducting a broader review of our tax positions?

Those questions matter. A single penalty can lead to a wholesale review of tax governance, changes to policies and personnel, and increased scrutiny from auditors and regulators.

The flip side: if you can show robust processes were in place and the error was an isolated failure despite those safeguards, you’re in a much stronger position to negotiate penalty remission.

When to consider objection or review

Not every penalty is worth disputing. But some are.

The decision to object depends on three things: the strength of your case, the size of the penalty, and the strategic value of contesting the ATO’s view of your behaviour.

When the behaviour characterisation is wrong

If the ATO has labelled your conduct as reckless or intentional disregard, and you can show you acted reasonably, challenge it. The financial difference between a 75% penalty and a 25% penalty is often worth the cost of a formal objection.

The test: can you point to contemporaneous evidence showing you sought advice, reviewed the law, documented your reasoning, and made a considered decision? If yes, you have a case. If your files are thin or non-existent, it’s harder.

When the tax position was reasonably arguable

If your underlying tax position was reasonably arguable, the penalty shouldn’t apply at all. This is one of the strongest grounds for objection.

The ATO’s view that your position was ultimately wrong doesn’t mean it wasn’t reasonably arguable when you took it. If you can show the law was uncertain, the facts were ambiguous, or the position was consistent with established practice, you can argue the penalty should be waived.

This often arises in areas where the law has changed, where there’s conflicting case law, or where the ATO’s own guidance is unclear.

When remission has been unreasonably refused

If you requested remission and the ATO refused without good reason, you can seek internal review or escalate to the Administrative Appeals Tribunal or Federal Court.

Remission refusals are harder to challenge than primary tax decisions, because the test is discretionary: was the ATO’s decision “fair and reasonable”? But if you can show the ATO ignored material evidence, applied the wrong test, or failed to consider relevant factors, you have grounds to push back.

When the penalty is part of a broader dispute

If you’re already objecting to the underlying tax assessment, it often makes sense to include the penalty in the same objection. You can argue both that the tax position was correct (so there’s no shortfall) and that even if there is a shortfall, the penalty is excessive or should be remitted.

This gives you two bites: you might win on the primary position and eliminate the penalty altogether, or you might lose on the tax but succeed in reducing the penalty.

When not to object

Objections are expensive and slow. If the penalty is small, or if your case is weak, it may not be worth the cost and management time.

Similarly, if you can negotiate a reduction through remission or settlement, that’s often faster and cheaper than a formal objection.

The strategic question: what’s the best way to minimise your total exposure and move forward? Sometimes that means fighting. Sometimes it means negotiating. The answer depends on the facts, the size of the penalty, and your appetite for dispute.

Disclaimer: This article provides general information about ATO shortfall penalties and remission processes. It is not legal or tax advice. Every dispute is fact-specific, and the application of penalty rates and remission discretion depends on the particular circumstances. If you are facing a shortfall penalty or considering objection or remission, you should seek professional advice based on your specific situation. Aptum Legal are specialists in tax disputes and can assist with penalty reviews, objections, and negotiations with the ATO.