Falling behind on your tax return is more common than you think but the Australian Taxation Office (ATO) penalties can escalate quickly. This guide explains exactly how the late tax return penalty works and how to fix overdue returns fast.
Key Takeaways
- The ATO charges Failure to Lodge (FTL) penalties based on “penalty units.”
- Interest charges, known as the General Interest Charge (GIC), may also apply to any overdue tax.
- Penalties increase every 28 days your return is late, up to a maximum cap.
- Making a voluntary disclosure to the ATO can significantly reduce penalties.
- Using a registered tax agent may provide “safe harbour” protection in some situations.
- Always check current ATO guidance – penalty unit values and interest rates can change.
What is the ATO late tax return penalty?
The ATO late tax return penalty, officially called a Failure to Lodge (FTL) on time penalty, is an administrative fine applied when you miss the deadline for submitting documents like your income tax return or Business Activity Statement (BAS returns and lodgements).
Think of it as an automated system designed to encourage timely compliance. For most individuals lodging their own tax return, the key deadline is 31 October. Missing this date without an extension can trigger the FTL penalty process. To get a clear picture of all the important dates, check out our complete guide on Australian tax return due dates.
The ATO applies these penalties automatically. However, they generally won’t apply an FTL penalty if the late lodgement results in a tax refund or a ‘nil’ outcome (where no tax is payable).
How the Failure to Lodge (FTL) penalty works
The ATO calculates the FTL penalty for Australia using a system of “penalty units.” Instead of a fixed dollar fine, the ATO assigns one penalty unit for every 28-day period (or part thereof) that a return is overdue.
Penalty unit value and how it’s calculated
The value of a penalty unit is set by the government and can change. To understand how much is the ATO late lodgement penalty, you need to know the current penalty unit value.
Note: Always check current ATO guidance on penalties as the penalty unit value changes regularly.
The penalty is capped at a maximum of five penalty units. The total fine also depends on the size of the entity:
- Small entities (aggregated turnover under $10 million) are fined at the base rate.
- Medium entities (turnover from $10 million to under $1 billion) are fined at double the base rate.
- Large entities (turnover of $1 billion or more) are fined at five times the base rate.
FTL Penalty amounts for small entities
The table below shows how the late tax return penalty escalates for a small business or individual based on a hypothetical penalty unit value.
| Days Overdue | Penalty Units Applied | Example Penalty Amount |
|---|---|---|
| 1 – 28 days | 1 | $330 |
| 29 – 56 days | 2 | $660 |
| 57 – 84 days | 3 | $990 |
| 85 – 112 days | 4 | $1,320 |
| 113+ days | 5 (Maximum) | $1,650 |
*Example based on a hypothetical $330 penalty unit value for 2025. Always confirm the current rate with the ATO.
Interest charges: GIC and SIC explained
On top of an FTL penalty, the ATO also applies interest to any unpaid tax debts. These ATO interest charges can significantly increase what you owe.
There are two main types:
- General Interest Charge (GIC): This is the most common charge for late tax payments. It applies to any overdue tax from the original due date until it is paid in full. The GIC rate is updated quarterly and compounds daily.
- Shortfall Interest Charge (SIC): This applies if you amend a previous tax assessment and it results in you owing more tax. It is charged at a lower rate than GIC.
For most people facing a late tax return penalty, the GIC is the primary concern. Because it compounds daily, it can quickly turn a manageable tax debt into a much larger one. You can find current rates on the ATO’s interest charges page.
Pro Tip: If you can’t pay your tax bill on time, setting up an ATO payment plan can help manage the debt and may stop further interest from accruing, depending on the arrangement.
What to do if your tax return is late
Realising you’ve missed the tax deadline can be stressful, but ignoring it will only worsen the tax return overdue consequences. Taking immediate, decisive action is the best way to minimise fines and interest.
Follow these steps to get back on track:
- Gather Your Information: Collect all necessary documents for the overdue financial year. This includes income statements, receipts for deductions (small business tax deductions), bank statements, and investment details. A comprehensive tax return checklist can prevent you from missing anything.
- Lodge the Return Immediately: Do not wait for an ATO warning letter or a non-lodgement notice. The quickest way to halt escalating penalties is to lodge the overdue return. You can do this via myGov or by engaging a registered tax agent.
- Contact a Tax Professional: A tax agent can help prepare and lodge your return correctly, ensuring all eligible deductions are claimed. They can also communicate with the ATO on your behalf to negotiate penalties.
- Review Your Notice of Assessment: Once lodged, the ATO will issue a Notice of Assessment detailing any tax payable, refunds, and penalties applied.
- Address the Penalty and Debt: If you have a tax debt or an FTL penalty, pay it by the due date if possible. If you can’t afford the full amount, contact the ATO or your agent to discuss an ATO payment plan.
Can the ATO waive or reduce penalties?
Yes, the ATO has the discretion to waive or reduce (“remit”) a late tax return penalty. A successful remission request usually depends on your circumstances and how you approach the situation.
Voluntary disclosure vs ATO contact: What works best?
Proactively telling the ATO about an overdue return is known as a voluntary disclosure. This is one of the most effective ways to reduce an ATO penalty. By coming forward before the ATO issues a warning, you demonstrate an intent to comply. While not a guarantee, the ATO is far more likely to reduce or waive a penalty for a taxpayer who makes a voluntary disclosure in Australia.
Requesting a remission
If a penalty has already been applied, you can formally request a remission. The ATO will consider this if your failure to lodge was due to circumstances beyond your control, such as:
- Natural disaster or serious illness
- Death of a family member
- Unavoidable postal delays
- Loss of records due to events like fire or theft
You’ll need to provide evidence to support your claim. For more information, refer to the ATO’s guidance on remission of penalties.
Safe harbour protections for taxpayers using a registered tax agent
Working with a registered tax agent provides access to tax agent extensions and safe harbour provisions. If you provide all necessary information to your agent on time, but they fail to lodge your return by the deadline, the safe harbour rules may protect you from the resulting FTL penalty.
What happens if you haven’t lodged for multiple years?
If you’re asking, “what if I haven’t lodged for years?“, the answer is to act now. Ignoring multiple outstanding returns can lead to severe tax return overdue consequences, including:
- Compounding penalties for each overdue return.
- Accruing GIC on any tax debts.
- The ATO issuing default assessments based on their own estimates of your income.
- In very rare and serious cases, prosecution.
A tax professional can help you manage the process of bringing your lodgements up to date, deal with the ATO on your behalf, and negotiate a manageable outcome for penalties and payments.
Worked example: 5 months late
Let’s say a small business lodges its tax return 5 months (approximately 140 days) late.
- The overdue period covers 5 x 28-day blocks (140 / 28 = 5).
- The penalty is capped at 5 penalty units.
- Using a hypothetical penalty unit value of $330, the maximum FTL penalty would be 5 x $330 = $1,650.
- In addition, GIC would be calculated daily on any unpaid tax from the original due date.
Checklist: Before lodging overdue returns
- [ ] Identify all outstanding lodgement periods.
- [ ] Gather all income statements, bank records, and expense receipts.
- [ ] Check if your ABN and contact details are current on the ABR.
- [ ] Consider using a registered tax agent for professional assistance.
- [ ] Prepare a statement explaining the reason for the delay if requesting a penalty waiver.
- [ ] Lodge the most recent return first if multiple are outstanding.
Frequently Asked Questions
How much is the ATO penalty for a late BAS?
The penalty for a late BAS penalty is calculated using the same Failure to Lodge (FTL) system as income tax returns. For a small business, this means one penalty unit is applied for every 28 days it is overdue, up to a maximum of five units.
Can I still get a refund if I lodge my tax return late?
Yes. If your tax return results in a refund, you will still receive it even if you lodge late. The ATO generally does not apply an FTL penalty if a refund is due or if the result is nil (no tax payable).
Can the ATO waive penalties for late lodgement?
Yes. The ATO can waive or reduce a late tax return penalty if you have a reasonable excuse, such as a natural disaster, serious illness, or if you make a voluntary disclosure before they contact you.
What happens if you lodge your tax return late?
If you lodge late and have a tax bill to pay, the ATO will likely apply an FTL penalty. The penalty increases every 28 days the return is overdue. General Interest Charge (GIC) will also apply to the unpaid tax debt.
Can the ATO prosecute for no tax return?
While the ATO can prosecute for failure to lodge, this is extremely rare and reserved for the most serious cases of repeated and deliberate non-compliance over many years. For most people, lodging the return and communicating with the ATO prevents any escalation.
How do I avoid late tax penalties?
The best way to avoid late tax penalties is to lodge on time. If you can’t, engage a registered tax agent who can often access extended deadlines. If you know you will be late, inform the ATO or your agent as early as possible.
Don’t let the stress of a late tax return penalty weigh you down. The expert team at Nanak Accountants & Associates can help you get compliant, minimise penalties, and restore your peace of mind. Call us today for a confidential consultation on 1300 NANAK TAX (626 258) or book an appointment online.
