Q4 2024 Bas Due Date 2024.  — to file and pay your monthly bas, you must do so by the 21st day of the following month. Information for registered agents about preparing and lodging tax statements and returns due in august 2024.

 — the bas due dates for 2024 are: When the due date for lodgment or payment falls on a saturday, sunday, or public holiday, it may be done on the next business day.