BAS Deadline Calculator
Find your next BAS lodgement and payment due dates for the 2025–26 financial year. Covers quarterly, monthly, and annual reporting periods.
BAS Deadline Calculator
Find your next BAS lodgement and payment due dates for the 2025–26 financial year. Covers quarterly, monthly, and annual reporting periods.
About This Tool
Find your next BAS lodgement and payment due dates for the 2025–26 financial year. Covers quarterly, monthly, and annual reporting periods.
A Business Activity Statement (BAS) is a form submitted to the ATO to report and pay several tax obligations including GST, PAYG withholding, PAYG instalments, and other taxes. Most small businesses lodge quarterly, while businesses with GST turnover of $20 million or more must lodge monthly. The reporting period you are assigned determines your due dates for the entire financial year.
Why This Matters for Australian Businesses
Late BAS lodgement attracts a Failure to Lodge (FTL) penalty of one penalty unit ($313 as of 2024–25) for each 28-day period the return is overdue, up to a maximum of five penalty units ($1,565). Late payment of the BAS amount owed incurs a General Interest Charge (GIC) calculated daily on the outstanding balance. Lodging through a registered tax agent often provides extended due dates — typically an extra four weeks for most quarters.
How to Use This Tool
- Select your BAS reporting frequency — quarterly, monthly, or annual
- Indicate whether you lodge yourself or through a registered tax agent
- View your upcoming lodgement and payment due dates for the 2025–26 financial year
- Note any dates that fall on weekends or public holidays — the due date moves to the next business day
Key Rules & Thresholds
- Quarterly BAS is due on the 28th day after the end of each quarter
- Monthly BAS is due on the 21st day after the end of each month
- Tax agent lodgement typically provides a four-week extension beyond standard due dates
- Electronic lodgement may provide an additional two weeks for some reporting periods
- If a due date falls on a weekend or public holiday, you have until the next business day
- The December monthly BAS has an extended due date due to the holiday period
How Results Are Calculated
This calculator uses the latest published rates and thresholds for the 2025–26 financial year. Results are estimates only — always verify with the relevant authority before making financial decisions.