1 December
Pay income tax for taxable large and medium taxpayers, companies and super funds. Lodgment of return is due 31 January 2027.
Pay income tax for the taxable head company of a consolidated group with a member deemed to be a large or medium taxpayer in the latest year lodged. Lodgment of return is due 31 January 2027.
Pay income tax for companies and super funds when lodgment of the tax return was due 31 October 2026.
21 December
Lodge and pay November 2026 monthly business activity statement.