15 May: Lodge 2024 tax returns for all entities that did not need to lodge earlier (including all remaining consolidated groups) and are not eligible for the June 5 concession.
21 May: Lodgement and payment of April 2025 monthly business activity statement.
26 May: Lodge and pay eligible quarter 3, 2024-25 activity statements if you or your client have elected to receive and lodge electronically.
28 May: Lodge and pay quarter 3, 2024–25 Superannuation guarantee charge statement if the employer did not pay enough contributions on time.