Every year, thousands of Australians miss the ATO tax return deadline, and their fines can add up fast. Are you one of them?
Missing the deadline may seem minor, but it could result in hundreds of dollars in penalties, damage your credit, or even trigger an audit.
If you’re an Australian expat or investor, this guide shows you how to avoid penalties for late tax returns and stay on the ATO’s good side.
Understanding Penalties for a Late Tax Return in Australia
Lodging your tax return late can result in automatic penalties and additional interest on unpaid amounts. The ATO uses a tiered system to calculate these charges based on your delay.
Here’s what you need to know to stay compliant and avoid unnecessary costs.
Failure to Lodge Penalty (FTL)
The Failure to Lodge (FTL) on time penalty is applied automatically when your tax return is late.
The ATO calculates this based on “penalty units.” One penalty unit currently equals $364, and you can be charged one unit every 28 days your return is late, up to a maximum of 5 units ($1,820).
For example, if you’re two months late, expect at least $660 in fines, even if you don’t owe tax money to the ATO.
General Interest Charge (GIC) on Unpaid Tax
If you also owe tax, the ATO adds a General Interest Charge (GIC) on top of the FTL.
The GIC is calculated daily and compounds quarterly. As of January 2026, the GIC rate is 10.65% per annum, making delays especially costly.
Even small amounts owing can grow quickly if left unpaid. For example, $2,000 unpaid for 6 months could cost you over $100 in interest.
GIC rates are updated quarterly, so it’s a good idea to stay updated with the ATO.
Potential Maximum Penalties for Overdue Returns
Penalties can become more severe if you continually miss deadlines or have a history of non-compliance.
For businesses or high-income earners, the penalty can be multiplied up to 5 times the base rate, depending on your size and past behaviour.
In serious cases, the ATO may initiate audits, apply penalties for fraud or evasion, or take legal action. Penalties for tax evasion can reach 75% of the tax avoided, plus interest and potential prosecution.
AU Expats—Stay Penalty-Free This Tax Season
Worried about getting hit with an ATO fine? Thousands of Aussies face penalties each year for late lodgments, often without even realising they’re at risk. Stay ahead of deadlines and avoid unnecessary fines with expert help.
How to Avoid Late Tax Return Penalties: Proactive Strategies
You can take action before the deadline to avoid incurring a penalty. The ATO may also allow extensions, and working with a tax professional can also protect you from mistakes or delays. Here are the proactive strategies that may apply to your situation:
1. Apply for a Lodgment Deferral With the ATO
If you can’t lodge on time due to valid reasons, you can request a deferral before the deadline.
This can push your lodgment date further without triggering an FTL penalty.
Who Can Apply for a Deferral?
You can apply if you are:
- Affected by personal hardship (e.g. illness, family emergency)
- Experiencing natural disasters or technical issues
- Transitioning to a new job, business structure, or location
Tax agents can also request bulk deferrals for customers.
Steps to Request an Extension
- Log in to your ATO online account via myGov
- Select “Tax” > “Lodgments”
- Choose the year and return type
- Click “Request extension” and fill in your reason
- Await ATO approval (usually within 5 business days)
2. Engage a Registered Tax Agent
Registered tax agents offer automatic extensions until 15 May of the following year, provided you register with them before 31 October.
They can also:
- Check if you’re eligible for deductions
- Handle ATO correspondence
- Prevent errors that could delay your return
Working with a tax agent is one of the safest ways to avoid late tax return penalties.
3. Submit a Non-Lodgment Advice If You Have No Income
If you didn’t earn income this financial year but were previously required to lodge, submit a ‘non-lodgment advice’ to the ATO.
This informs the ATO that you’re not ignoring your obligation; you’re confirming that there is nothing to report. It protects you from a Failure to Lodge (FTL) penalty. Here’s how you can submit a non-lodgment advice:
- Log in to ATO Online via myGov
- Select Tax > Lodgments
- Choose Non-lodgment advice
- Submit your reason and confirm your details
To know more about whether you need to lodge, check out our article on Do You Need to Lodge a Tax Return in Australia?
4. Lodge a Partial Return If You’re Missing Some Info
If you’re still waiting on documents (like payment summaries or bank interest), don’t delay your entire return. You may be able to lodge with available data, then amend your return later once you have the missing info.
This is better than missing the deadline and being hit with penalties. An experienced tax agent can guide you through the amendment process.
5. Set Up ATO Alerts and Reminders
If you still have time before the deadline, avoid last-minute panic by setting calendar reminders and ATO online notifications. Staying informed about due dates helps prevent accidental late lodgment. You can:
- Enable SMS/email alerts in your myGov settings
- Set personal reminders 1–2 weeks before due dates
- Bookmark the ATO’s key dates calendar
6. Reach Out Before the Deadline
If you’re feeling unsure or overwhelmed, don’t stay silent. Whether it’s the ATO or your tax agent, early communication is key, especially if you’re dealing with hardship, delays, or missing documents.
The ATO is more likely to offer support or flexibility if you contact them before the due date, rather than after penalties have applied.
Already Missed the Deadline? Steps to Minimise or Avoid Penalties
If you’re already late, don’t panic about the consequences of a late tax return. The faster you act, the more you can reduce the damage.
Here’s what you can do now.
1. Lodge Your Tax Return as Soon as Possible
The longer you wait, the more you pay to the ATO.
Even if you can’t pay your tax bill, lodging a first shows good faith. The ATO often remits some penalties if you demonstrate prompt action.
2. Contact the ATO Directly
The ATO is more understanding if you reach out.
Call 13 28 61 or use your myGov inbox to explain your situation. They might pause penalty accrual, offer payment plans, and reduce interest.
3. Request Remission of Penalties and Interest
You can formally request the ATO remove penalties or interest if you have valid reasons.
The ATO may consider remission if you:
- Suffered serious illness or family loss
- Faced natural disasters
- Had ATO system issues
- Were misadvised by a tax professional
Each case is reviewed individually.
How to Dispute an ATO Penalty or Interest Charge
- Log into myGov > ATO
- Go to “Lodgments” > “Disputes and Remissions”
- Submit your request and documentation
Alternatively, your tax agent can handle the process for you.
4. Amend Your Tax Return if Needed
Mistakes can also trigger reviews or extra charges.
You can lodge an amendment online to fix errors, declare missing income, or add missed deductions.
Amending your return quickly can prevent future penalties and interest if the ATO audits you.
Considerations for Australian Expats to Avoid Tax Penalties
If you’re living overseas, you’re still required to lodge a tax return if you’re an Australian tax resident. Many expats face fines due to misunderstanding their obligations.
Understand Australian Tax Residency for Expats
Your tax residency status determines whether you must lodge a return and what you need to declare.
Even if you live abroad, you may still be considered a tax resident if you:
- Intend to return to Australia
- Maintain ties like a home, super, or a family in Australia
- Don’t establish permanent residency elsewhere
If you’re an Australian tax resident, you must declare all your foreign income, including salary, rent, interests and dividends.
If the ATO considers you a non-resident for tax purposes, you generally only need to declare your Australian-sourced income. You don’t need to report your foreign income (e.g. overseas salary, investments, or business income).
However, as a non-resident, you must declare:
- Rental income from Australian properties
- Capital gains on Australian taxable assets (e.g. real estate, shares in land-rich companies)
- Australian-sourced dividends, interest, and royalties (withholding tax applies)
- Income from Australian employment, business, or services performed in Australia
- Any income you earned while temporarily working in Australia
Failure to declare can result in fines for tax fraud or lead to audit investigations.
Manage Overseas Study Loan Repayments (HELP/HECS)
If you have a HELP or HECS debt and earn above the threshold overseas, you’re required to report and repay via the ATO.
Failing to report income or update your status can result in overdue tax return penalties or the withholding of travel documents.
FAQs about How to Avoid Overdue Tax Return Penalty Fees
What happens if I don’t lodge my tax returns on time?
If you fail to lodge your tax returns on time, the ATO will impose financial penalties, calculated in penalty units. These penalties can accumulate over time, leading to significant financial liabilities. Additionally, the ATO may charge interest on any unpaid taxes, increasing the amount you owe.
Our expat tax specialists can help you catch up on overdue tax returns and minimise penalties.
What do you mean by penalty units?
Penalty units are a standard measure used by the Australian Taxation Office (ATO) to calculate fines and penalties for various tax-related offences, including overdue tax returns. The Australian government periodically adjusts the value of one penalty unit. As of 2026, a penalty unit is valued at AU $364.
Can penalties be reduced or waived?
Yes, penalties can be reduced or waived in some cases, particularly if you demonstrate genuine reasons for the delay or take prompt action to rectify the situation.
Do I still need to lodge a return if I don't owe any taxes?
Yes, even if you don’t owe taxes, you must lodge a return if you have Australian-sourced income or meet other criteria set by the ATO. This ensures that the Australian Tax Office understands your financial situation.
You must file a tax return even if you didn’t earn a profit. This includes situations where you experienced capital gains or losses or your rental property expenses exceeded your rental income.
What happens if you haven't done your taxes in years in Australia?
You may face several consequences if you haven’t done your taxes in Australia in years. These could include late filing penalties, interest on unpaid tax, and potentially more severe actions from the Australian Taxation Office (ATO), like garnishing wages or taking legal action. It’s essential to address the issue as soon as possible, and seeking professional advice from a tax expert is recommended to help manage the situation effectively.
Do I need to lodge a tax return in Australia if I live overseas?
If you’re an Australian citizen living overseas, whether you need to lodge a tax return in Australia depends on your residency status for tax purposes.
You’re most likely to be considered a non-resident by the ATO, meaning you only need to pay Australian taxes on income sourced in Australia. However, you must pay Australian taxes on your worldwide income if you’re deemed a resident.
AU Expats—Don’t Let a Missed Deadline Cost You
Running behind on your tax return? The ATO may charge you penalties or interest if you wait too long, but most issues can be avoided with the right support. Learn how to stay penalty-free, even if you’re not ready to lodge yet.
Key Takeaways
- Avoid the penalty for late tax return by lodging before 31 October or using a registered agent.⬆️
- The ATO charges up to $1,820 a year in FTL penalties plus interest on unpaid tax.⬆️
- You can request an ATO extension or remission if you have valid reasons.⬆️
- Lodge quickly, even if you’re late, to minimise charges.⬆️
- Expats must declare global income and update study loan details to stay compliant.⬆️
- Don’t risk it—staying on top of your tax return saves stress, money, and trouble.⬆️
