| Date | Category | Description |
| 1 Dec 2021 | Income tax | Due date for companies and superannuation funds, that were taxable large/medium entities in the immediate prior year, to pay income tax for the year to 30 June 2021. The due date for these entities to lodge 2020/21 income tax returns is 15 Jan 2022. |
| 1 Dec 2021 | Income tax | Due date for taxable head companies of consolidated groups (including new registrants), that have a member deemed to be a large/medium entity in the immediate prior year, to pay income tax for the year to 30 June 2021. The due date for these entities to lodge 2020/21 income tax returns is 15 Jan 2022. |
| 1 Dec 2021 | Income tax | Due date for companies and superannuation funds, that were required to lodge income tax returns on 31 Oct 2021, to pay income tax for the year to 30 June 2021. |
| 21 Dec 2021 | Activity statements |
Due date to lodge and pay monthly activity statements for November 2021. Tax obligations that may be payable include:
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| 31 Dec 2021 | Charities | Due date of charities to lodge their annual information statements for the year ended 30 June 2021. |
