What Is the Tax Return Lodgement Deadline in Australia? Key Dates & Extensions
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The tax return lodgement deadline is the last date by which you must submit your income tax return to the Australian Taxation Office (ATO). Lodging on time is critical to…
The tax return lodgement deadline is the last date by which you must submit your income tax return to the Australian Taxation Office (ATO). Lodging on time is critical to avoid late penalties, interest, or loss of refunds.
Deadlines vary based on:
- Whether you’re lodging yourself or via a tax agent
- Your entity type (individual, sole trader, company, etc.)
- Your lodgement history and ATO risk profile
Key Tax Lodgement Deadlines (2024–25)
| Type of Lodger | Lodgement Deadline |
|---|---|
| Individual (self-lodged) | 31 October 2025 |
| Via registered tax agent | Up to 15 May 2026 (conditions apply) |
| Late prior-year lodger | May have earlier deadline |
| Company return | Varies (often 28 Feb or 15 Jan) |
| SMSF return | 28 February 2026 (if not overdue) |
To qualify for the agent extension, you must engage the tax agent by 31 October 2025.
Consequences of Late Lodgement
- $313 late lodgement penalty (as of 2025)
- Interest charges on any tax owed
- Loss of refund or tax offsets
- Risk of compliance review or audit
The ATO may issue a default assessment if no return is lodged after multiple reminders.
How to Avoid Missing the Deadline
- Add the deadline to your calendar (31 October if self-lodging)
- Use a registered tax agent to get extra time
- Lodge a deferral request if there are valid reasons
- Keep financials and documents up to date throughout the year
How Ozobooks Helps
- Registers you with a tax agent in time for the extended deadline
- Keeps your business records up to date for faster lodgement
- Applies for ATO lodgement deferrals if needed
- Ensures your return is accurate and penalty-free
FAQ
Q1: What if I miss the 31 October deadline?
If you haven’t used a tax agent, you risk penalties. If you act quickly, a tax agent may still be able to help with a late registration.
Q2: Do I need to lodge a return if I earned no income?
Yes — if you’re required to lodge, you must do so even if your income is zero. Otherwise, submit a non-lodgement advice to the ATO.
Q3: Does a business have the same deadline?
No — companies and trusts have different lodgement schedules, often based on balance dates and whether you use a tax agent.
Q4: Can I lodge early?
Yes — tax season opens 1 July for the previous financial year.