21 March

• Lodge and pay February 2027 monthly business activity statement.

31 March

• Lodge tax return for companies and super funds with total income over $2 million in the latest year lodged (excluding large and medium taxpayers), unless due earlier. Payment also due by this date.
• Lodge tax return for the head company of a consolidated group (excluding large and medium) with a member whose total income exceeded $2 million in their latest year lodged, unless due earlier. Payment also due by this date.
• Lodge tax return for individuals and trusts whose latest return resulted in a tax liability of $20,000 or more (excluding large and medium trusts). Payment due as advised on their notice of assessment.