The following are the important ATO dates for this month. As per ATO Dates – September 2025

September

Key lodgment and payment dates for business for September.

21 September

Activity statements

  • August monthly activity statements – final date for lodgment and payment.

30 September

Single Touch Payroll (STP) closely-held payees

  • End-of-year finalisation declaration through STP for closely held payees due for employers who have both closely held payees and arm’s length employees.

Annual TFN withholding report

  • Annual TFN withholding report for closely-held trusts where a trustee has been required to withhold amounts from payments to beneficiaries during the previous financial year – final date for lodgment.
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