21 September
Lodge & pay August 2026 monthly business activity statement
30 September
Lodge PAYG withholding payment summary annual report if prepared by a BAS agent or tax agent, excluding large withholders whose annual withholding is greater than $1 million.
Lodge Annual TFN withholding report 2026 if a trustee of a closely held trust has been required to withhold amounts from payments to beneficiaries.
21 October
Pay annual PAYG instalment notice (Form N). Lodge only if you vary the instalment amount or use the rate method to calculate the instalment.
Lodge and pay quarter 1, 2026–27 PAYG instalment activity statement for head companies of consolidated groups.
Lodge and pay September 2026 monthly business activity statement.
28 October
Lodge and pay quarter 1, 2026–27 activity statement, if lodging by paper.
Pay quarter 1, 2026–27 instalment notice (Form R, S, or T). Lodge the notice only if you vary the instalment amount.
Lodge and pay annual activity statement for TFN withholding for closely held trusts where a trustee withheld amounts from payments to beneficiaries during the 2025–26 income year.
31 October
Final date to add new clients to your client list to ensure their 2026 tax return is covered by the lodgment program.
Lodgement of individual 2026 Tax Returns, if not covered under concession for tax agents.
Lodge tax returns for all entities if one or more prior year returns were outstanding as at 30 June 2026.