Staying on top of your BAS lodgement dates is critical. Late lodgement can result in penalties, interest charges and unnecessary stress. Here are the key dates for 2026.
Quarterly BAS Due Dates 2026
| Quarter | Period | Due Date |
|---|---|---|
| Q2 FY26 | Oct – Dec 2025 | 28 February 2026 |
| Q3 FY26 | Jan – Mar 2026 | 28 April 2026 |
| Q4 FY26 | Apr – Jun 2026 | 28 July 2026 |
| Q1 FY27 | Jul – Sep 2026 | 28 October 2026 |
Monthly BAS
If you lodge monthly, your BAS is due on the 21st of the following month. If the 21st falls on a weekend or public holiday, the due date moves to the next business day.
Other Key Dates
- Super guarantee: Due 28 days after the end of each quarter
- STP finalisation: 14 July for most employers
- Income tax returns: 31 October for self-lodgers; later if lodged through a tax agent
- FBT return: 21 May (for the year ending 31 March)
Never Miss a Deadline
As registered BAS agents, we handle lodgement for all our clients — on time, every time. No more calendar watching or last-minute stress.