- Lodge and pay November 2023 monthly business activity statement.
21 January
- Lodge and pay December 2023 monthly business activity statement except for business clients with up to $10 million turnover who report GST monthly and lodge electronically.
28 January
- Make quarter 2, 2023–24 super guarantee contributions to funds by this date.
31 January
- Lodge tax return for taxable large and medium entities as per the latest year lodged (all entities other than individuals), unless required earlier.
- Payment for large and medium entities with a 31 January due date is:
- 1 December 2023 – for companies and super funds
- for trusts – as stated on their notice of assessment.
- Lodge tax return for the taxable head company of a consolidated group (including a new registrant) that has a member who has been deemed a large or medium entity in the latest year lodged, unless the return was required earlier. Payment was due 1 December 2023.
21 February
- Lodge and pay December 2023 monthly business activity statement for business clients with up to $10 million turnover who report GST monthly and lodge electronically.
- Lodge and pay January 2024 monthly business activity statement.