Key ATO dates for the 2026–27 income year (1 July 2026 to 30 June 2027).
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Quarterly BAS and PAYG instalment
For October to December 2026 (28 February is a Sunday). There's no extra time for lodging online for this quarter.
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Quarterly BAS and PAYG instalment
For January to March 2027; two weeks more if you lodge online.
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End of the 2026–27 income year
Super contributions must reach your fund by today to count for 2026–27: the concessional cap is $32,500 and the non-concessional cap $130,000.
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2027–28 income year starts
The low income super tax offset rises to cover incomes up to $45,000.
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Employers finalise payroll for the year
Your income statement in myGov should be marked tax ready by now.
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Quarterly BAS and PAYG instalment
For April to June 2027; two weeks more if you lodge online.
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2026–27 tax return due
If you lodge yourself (31 October is a Sunday). With a registered tax agent you usually have longer. Also the annual GST return date.
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Source: Australian Taxation Office: BAS due dates, super contribution caps, Payday Super, lodging your tax return. If a date falls on a weekend or holiday, the deadline is usually the next working day; the dates above already allow for that where the tax authority says so.