A Business Activity Statement (BAS) is a periodic reporting obligation for all businesses required by the Australian Taxation Office (ATO). It is basically a summary of all the types of indirect taxes you have paid or collects during a specified period.

The indirect taxes you’re required to pay or collects depends on the products or services you offer to your customers. The lists of direct and indirect taxes in the BAS lodgment are as follows:

• Goods and Services Tax (GST)
• Fringe benefits tax (FBT) instalment
• Pay as you go (PAYGI) income tax instalment
• Pay as you go (PAYGW) tax withheld
• Fuel tax credits
• Wine Equalisation tax(WET)
• Luxury car tax (LCT)

What is an Instalment Activity Statement?

An instalment activity statement is a document the Australian Taxation Office (ATO) issues for the prepayment of income tax. The type of IAS lodgment is depending on your business reporting obligation to ATO.

• You are not registered for Goods and Services Tax (GST), but you need to report PAYG Instalments, PAYG Withholding, ABN Withholding, and/or FBT Instalments.
• You submit quarterly Business Activity Statements (BAS), but you must also pay PAYG withholding tax monthly since you are classified as a medium withholder.

• Quarterly BAS Lodgment
• Monthly BAS Lodgment
• Annual BAS Lodgment

Business Activity Statement-1st of July 2023 to 30th of June 2024

Quarterly Lodgment	Due date
July, August and September	28th October
October, November and December	28th February
January, February and March	28th April
April, May and June	28th July

For business entity BAS lodgment obligation is monthly then the due date is the 21st day of the following month. This mean your July monthly BAS lodgment is due on 21st of August. For business turnover is $20 million or more, you must lodge your BAS returns monthly.

For sole traders voluntarily registered for GST and your GST turnover is under $75,000 ($150,000 for not-for-profit organisations), your annual BAS return is due on 31st of October. If you aren't required to lodge a tax return then the due date is 28th of February following the annual tax period.