Late Tax Return Penalties Australia 2026
Last reviewed:
Primary tax-year context: Current Australian tax settings
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General information only. Speak with a registered tax or BAS agent for advice.
This page is designed as a practical compliance checklist. Exact due dates can vary by entity type and lodgment channel, so always confirm in current ATO guidance.
Compliance checklist
- Confirm your specific entity and reporting cycle
- Confirm due date and payment date separately
- If you cannot pay on time, contact the ATO before due date
Sources (verified)
- ATO preparing your tax return (individual due date)
- ATO BAS due dates
- ATO due dates calendar for tax professionals
Next step
- Estimate tax payable via the Tax Return Calculator
- Estimate BAS position via the BAS Calculator