Filing your tax return in Australia can feel overwhelming, especially if you’re not familiar with tax rules and deadlines. But here’s the good news: the key dates are fairly predictable, and there are flexible options if you need more time. In short: individuals must generally lodge their tax return by 31 October, but if you use a registered tax agent, you could get an extension,sometimes until May of the following year.
This article breaks down exactly when your tax return is due, who qualifies for extensions, and how to avoid penalties for late lodgement. Whether you’re lodging yourself or using a tax agent, we’ve got you covered.
Key Tax Return Deadlines for Individuals
31 October Deadline (Lodging Yourself)
If you’re preparing and lodging your own tax return through myGov, the deadline is 31 October. This applies to most individuals and sole traders.
Example:
If your income year ends on 30 June 2025, you must lodge your 2024–25 tax return by 31 October 2025.
Exceptions for First-Time Lodgers
If you’re lodging a return for the first time and aren’t using a tax agent, the ATO recommends contacting them by 31 October to check your obligations. First-timers can sometimes be granted extra time.
If 31 October Falls on a Weekend
When the deadline falls on a weekend or public holiday, you can lodge on the next business day without penalty.
Using a Registered Tax Agent: Extended Due Dates
Lodge Later with a Tax Agent
If you engage a registered tax agent before 31 October, you may be eligible for a later lodgement date. The actual deadline depends on your situation and when the tax agent adds you to their client list.
Typical extended deadlines include:
- 15 May of the following year for most individuals
- 31 March if you have higher income or outstanding prior-year returns
Important: You must be on the tax agent’s client list by 31 October to qualify for the extension.
Why Use a Tax Agent?
- More time to lodge
- Guidance on deductions and offsets
- Help avoiding penalties and errors
What Happens If You Lodge Late?
Failure to Lodge Penalty (FTL)
The ATO may apply a Failure to Lodge on Time penalty if you miss the deadline. The penalty is calculated in blocks of 28 days and can add up quickly.
As of 2025, the base rate is $313 per 28-day block, capped at five blocks (maximum $1,565).
Late Lodgement Doesn’t Always Trigger a Penalty
If you usually lodge on time and your return is only a few days late, the ATO may not apply a penalty. However, repeat offenders are more likely to be penalised.
Interest Charges
In addition to penalties, interest may be charged on any unpaid tax from the original due date.
What If You Can’t Lodge On Time?
Contact the ATO Early
If you know you won’t be able to lodge by the deadline, it’s better to contact the ATO before the due date. In some cases, they may grant a lodgement deferral.
Engage a Tax Agent Late (But Act Quickly)
If it’s after 31 October and you haven’t lodged, you can still contact a tax agent. They may be able to get you an extension, but this isn’t guaranteed. It depends on your lodgement history and when they can add you to their client list.
Apply for a Lodgement Deferral
Tax agents can also request ATO-approved deferrals for clients affected by:
- Natural disasters
- Serious illness
- Other exceptional circumstances
Deferrals are granted on a case-by-case basis.
Lodgement Due Dates for Other Entities
Sole Traders
Sole traders follow the same deadlines as individuals. However, if your business is more complex, using a tax agent is highly recommended.
Partnerships, Trusts, and Companies
These entities generally have different deadlines. Most are eligible for agent extensions if registered early:
- 31 October if lodging on your own
- 28 February or 15 May if lodging through a tax agent
Always confirm with your accountant or the ATO based on your structure and circumstances.
Tips to Stay on Track
1. Don’t Wait Until the Last Minute
ATO systems can get overloaded near deadlines. Start early to avoid delays.
2. Keep Your Records Organised
The ATO expects you to keep receipts and records for at least five years.
3. Set Up Reminders
Add key dates to your calendar: 30 June (end of financial year), 31 October (standard lodgement deadline), and 15 May (extended agent deadline).
4. Consider Using a Tax Agent
Besides offering extensions, a good tax agent can identify deductions you might otherwise miss.
Summary: Your Tax Lodgement Options
| Lodging Option | Lodgement Deadline | Extension Available? |
| Lodging via myGov | 31 October | No |
| Using a tax agent | Up to 15 May (varies) | Yes, if engaged by 31 Oct |
| Lodging late | After 31 October | Maybe, contact agent/ATO |
Final Thoughts
Meeting your tax return deadline isn’t just about avoiding penalties,it’s about peace of mind. If you’re unsure about your deadline, or think you might need more time, don’t wait. Engaging a tax agent early gives you more flexibility and can help maximise your return.
If you’re looking for help navigating your 2024-25 return or want to explore your extension options, a registered tax agent can guide you step by step.
About The Author: Artur Osadchiy
Artur is a Certified Practising Accountant with over 30 years’ experience working as a trusted advisor to 600+ clients across Australia. Based in Melbourne, he started Tax Window with his wife Marina in 2009 and leads the firm’s tax and accounting team. In his free time, Artur enjoys watching the AFL (go Kangas!) and spending time with family.
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