The Australian Taxation Office has announced the following key dates to look out for in March 2026.

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21 March

Lodge and pay February 2026 monthly business activity statement.

31 March

Lodge tax return for companies and super funds with total income of more than $2 million in the latest year lodged (excluding large and medium taxpayers), unless the return was due earlier.

• Payment for companies and super funds in this category is 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 for individuals and trusts in this category is due as advised on their notice of assessment.