In Australia, individual tax returns for the 2024-25 financial year are due by 31 October 2025 if you are lodging the return yourself. The tax return lodgement system opens on 1 July 2025 , which is the earliest date you can start submitting your return. If you use a registered tax agent to lodge your tax return, you usually get an automatic extension. This extension can allow you to lodge your return as late as 15 May 2026 , depending on your circumstances and the tax agent's lodgement program. However, to be eligible for this extension, you generally must have lodged all prior year tax returns on time and register with the agent before the 31 October deadline. If you miss the self-lodged deadline, there are penalties such as $330 for every 28 days late, capped at $1,620 after 140 days late. Summary:
- Tax return lodgement opens: 1 July 2025
- Self-lodged returns due: 31 October 2025
- Registered tax agent extended deadline: Up to 15 May 2026
- Late lodgement penalties apply after 31 October 2025 for self-lodgers
This applies to individual tax returns for the financial year July 1, 2024 to June 30, 2025.
