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BAS Deadline Calendar 2026–27
Every quarterly BAS due date for Australian sole traders and freelancers. Download the PDF or add all deadlines to your calendar with one click.
Quarterly BAS Due Dates
| Quarter | Period | Due Date |
|---|---|---|
| Q3 FY25-26 | Jan – Mar 2026 | 28 April 2026Coming up |
| Q4 FY25-26 | Apr – Jun 2026 | 28 July 2026 |
| Q1 FY26-27 | Jul – Sep 2026 | 28 October 2026 |
| Q2 FY26-27 | Oct – Dec 2026 | 1 March 2027 |
| Q3 FY26-27 | Jan – Mar 2027 | 28 April 2027 |
| Q4 FY26-27 | Apr – Jun 2027 | 28 July 2027 |
Late lodgement penalty
The ATO charges $313 per 28-day period up to $1,565 for late BAS. Lodge on time even if you can't pay — you can arrange a payment plan.
Tips for sole traders
- Lodge online for an additional 2-week extension on most quarters
- Set calendar reminders 2 weeks before each due date
- Keep bank transactions categorised throughout the quarter
- AdminZero can estimate your BAS automatically from your bank feed
This calendar is for informational purposes only. AdminZero is not a registered tax agent and this does not constitute tax advice. Dates are based on published ATO schedules as of April 2026 and may change. Always verify at ato.gov.au.
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