When is my quarterly BAS due?

Quarterly BAS due dates in Australia are: Q1 (Jul–Sep) due 28 October; Q2 (Oct–Dec) due 28 February; Q3 (Jan–Mar) due 28 April; Q4 (Apr–Jun) due 28 July. Tax agents may have extended deadlines.

When is my monthly BAS due?

Monthly BAS statements are due on the 21st of the following month. For example, your July BAS is due 21 August. December is an exception — it is due 21 February.

Do tax agents get extended BAS due dates?

Yes. Businesses lodging through a registered tax agent or BAS agent are typically granted extended due dates by the ATO, particularly for Q1 and Q3 quarterly BAS.

Free Tool by The Metier Group

BAS Due Date Calculator

Find your next Business Activity Statement lodgement deadline — monthly, quarterly, or annual — including ATO extended due dates for tax agent lodgements.

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Financial Year

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Extended deadlines may apply

Important

If a due date falls on a weekend or public holiday, it moves to the next business day. Always confirm your specific due date with the ATO or your tax agent.

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Quarterly BAS Due Dates — FY2026-27

Standard ATO deadlines

Q1 — 1 Jul to 30 Sep 2026

28 October 2026

Q2 — 1 Oct to 31 Dec 2026

28 February 2027

Q3 — 1 Jan to 31 Mar 2027

28 April 2027

Q4 — 1 Apr to 30 Jun 2027

28 July 2027

Frequently Asked Questions

What happens if I miss my BAS due date?

The ATO may issue a Failure to Lodge (FTL) penalty. For small businesses, this is $313 per 28-day period (or part thereof) the BAS is overdue, up to a maximum of $1,565. Interest charges may also apply on any GST owed.

Can I get more time to lodge my BAS?

Yes — lodging through a registered BAS agent or tax agent typically gives you extended due dates. You can also contact the ATO directly to request a deferral if you have a genuine reason.

Who needs to lodge a BAS?

Any business registered for GST must lodge a BAS. Businesses with GST turnover of $75,000 or more (or $150,000 for non-profits) are required to register for GST and lodge BAS statements.

Disclaimer

This tool is provided by Metier 2020 Pty Ltd (trading as The Metier Group) for general information purposes only. Due dates are based on ATO published schedules and may change. If a due date falls on a weekend or public holiday it moves to the next business day. Always confirm your specific lodgement deadline with the ATO or your registered tax or BAS agent. This tool does not constitute tax advice.