BAS due dates
Your next quarterly BAS (the form you send the tax office) is due 28 October 2026, for Q1 2026–27.
Quarterly BAS
Most small businesses lodge quarterly.
| Period | Covers | Due |
|---|---|---|
| Q1 2026–27 | 1 July 2026 to 30 Sept 2026 | 28 October 2026 |
| Q2 2026–27 | 1 Oct 2026 to 31 Dec 2026 | 28 February 2027 |
| Q3 2026–27 | 1 Jan 2027 to 31 Mar 2027 | 28 April 2027 |
| Q4 2026–27 | 1 Apr 2027 to 30 June 2027 | 28 July 2027 |
| Q1 2027–28 | 1 July 2027 to 30 Sept 2027 | 28 October 2027 |
| Q2 2027–28 | 1 Oct 2027 to 31 Dec 2027 | 28 February 2028 |
Monthly BAS, 2026–27
Bigger businesses (and some who choose to) lodge every month.
| Period | Covers | Due |
|---|---|---|
| Jul 2026 | 1 July 2026 to 31 July 2026 | 21 August 2026 |
| Aug 2026 | 1 Aug 2026 to 31 Aug 2026 | 21 September 2026 |
| Sep 2026 | 1 Sept 2026 to 30 Sept 2026 | 21 October 2026 |
| Oct 2026 | 1 Oct 2026 to 31 Oct 2026 | 21 November 2026 |
| Nov 2026 | 1 Nov 2026 to 30 Nov 2026 | 21 December 2026 |
| Dec 2026 | 1 Dec 2026 to 31 Dec 2026 | 21 February 2027 |
| Jan 2027 | 1 Jan 2027 to 31 Jan 2027 | 21 February 2027 |
| Feb 2027 | 1 Feb 2027 to 28 Feb 2027 | 21 March 2027 |
| Mar 2027 | 1 Mar 2027 to 31 Mar 2027 | 21 April 2027 |
| Apr 2027 | 1 Apr 2027 to 30 Apr 2027 | 21 May 2027 |
| May 2027 | 1 May 2027 to 31 May 2027 | 21 June 2027 |
| Jun 2027 | 1 June 2027 to 30 June 2027 | 21 July 2027 |
These are the standard due dates from the tax office. If a tax agent lodges for you, you may get extra time, and dates that fall on a weekend or public holiday move to the next business day. Your accountant can tell you your exact dates.
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