AusTax Tools Calendar
Monthly due dates

September 2026 Australian Tax Calendar

Review the main Australian tax due dates scheduled for September 2026, then use filters to narrow the list by BAS, PAYG, super, STP, FBT, lodgment or audience.

1 key dates in this month Employers • Businesses
← August 2026 Back to full calendar October 2026 →

What matters in September 2026

September 2026 includes 1 scheduled due date covering STP.

  • Best for Employers, Businesses who need a fast month-level view.
  • Every listed date links back to a source so you can verify whether an extension, weekend rule, or agent timing applies.
  • Use the filters below if you only want BAS, PAYG, super, STP, FBT or lodgment dates.

Calendar filters

Monthly calendar

Key dates in September 2026

30 September 2026

STP finalisation due for closely held payees

Finalisation due date for closely held payees where this rule applies.

Upcoming STP

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Compliance guides by task

Employers

Pair the calendar with payroll, super and FBT guidance.

Sole traders

Use BAS and PAYG due dates alongside sole trader tax guidance.

Deadlines and compliance

Read the supporting explainers behind recurring due dates.
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FAQ

What is the self-lodgment deadline?

For most individuals, the self-lodgment deadline is 31 October each year, with next business day treatment if needed.

Are these dates legal advice?

No. This calendar is informational only. Always confirm your exact obligation on the ATO website or with a registered tax agent.