1 December
Income tax for taxable large/medium tax payers, companies and super funds due

21 December
November 2017 monthly BAS / IAS due

15 January
Tax return for taxable large/medium entities as per the latest year lodged (all entities other than individuals) due

21 January
Quarterly PAYG instalment activity statement for quarter 2, 2017–18 for head companies of consolidated groups due, December 2017 monthly BAS due

28 January
Super guarantee contributions for quarter 2, 2017–18 due

21 February
December 2017 monthly BAS for small businesses (up to $10 million turnover) who report GST monthly and lodge electronically due, January 2018 monthly activity statement due.

28 February
Tax return for non-taxable large/medium entities as per the latest year lodged (all entities other than individuals) due

Tax returns for new registrant (taxable and non-taxable) large/medium entities (all entities other than individuals) due

Self-managed superannuation fund annual return for new registrant (taxable and non-taxable) self-managed super funds (SMSF) due

Quarterly activity statement, quarter 2, 2017–18 due

Quarterly instalment notice (form R, S or T), quarter 2, 2017–18 due

Annual GST return or information report due

Key tax dates sourced from the ATO