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

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15 May

• Lodge 2025 tax returns for all entities that did not have to lodge earlier (including all remaining consolidated groups) and are not eligible for the 5 June concession.
• Due date for companies and super funds to pay if required.

21 May

• Lodge and pay April 2026 monthly business activity statement.
• Final date to add new FBT clients to your client list to ensure they receive the lodgement and payment concessions for their fringe benefits tax returns.
• Lodge and pay Fringe benefits tax annual return if lodging by paper.

26 May

• Lodge and pay eligible quarter 3, 2025–26 activity statements if you lodge electronically.

28 May

• Lodge and pay quarter 3, 2025–26 Superannuation guarantee charge statement if the employer did not pay enough contributions on time.