How do I lodge a BAS in Australia?

Answer

You can lodge your Business Activity Statement (BAS) in Australia via the ATO's online services through myGov, accounting software, or by using a registered tax agent. Ensure you are registered for GST and have an ABN before lodging.

Australian Taxation Office (ATO)
Last Updated:May 6, 2026

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How it works in practice

Understanding BAS Lodgment

Lodging a Business Activity Statement (BAS) is a mandatory tax obligation for most Australian businesses registered for Goods and Services Tax (GST). The BAS reports and pays various taxes, including GST, Pay As You Go (PAYG) instalments, PAYG withholding, and fringe benefits tax (FBT).

Lodgment Methods

The most common and recommended way to lodge your BAS is electronically through ATO online services. This can be accessed via your myGov account linked to the ATO, or directly through your accounting software if it's SBR-enabled. Many businesses also choose to use a registered tax agent, who can lodge on your behalf and often provide extended deadlines.

Preparing for Lodgment

Before lodging, ensure all your financial records are up-to-date, including sales, purchases, and wage payments. Having accurate data is crucial for correctly reporting your tax obligations and claiming any eligible refunds or credits.

Important exceptions

Some businesses may not need to lodge a BAS if they are not registered for GST or do not have other tax obligations that require reporting through a BAS. If you're registered for GST but have no activity for a period, you must still lodge a 'Nil' BAS. Special rules apply for some non-profit organisations or government entities, which may have different thresholds or reporting frequencies. Always confirm your specific obligations with the ATO or a tax professional.

What you should do now

  1. Confirm Eligibility and Registration: Ensure your business has an ABN and is correctly registered for GST (if applicable) through the Australian Business Register.

  2. Gather Financial Records: Collect all necessary financial documents, including sales invoices, purchase receipts, and payroll records for the reporting period.

  3. Calculate Your Obligations: Determine your GST payable/refundable, PAYG instalments, and PAYG withholding amounts using your financial data.

  4. Choose a Lodgment Method: Select your preferred method: ATO online services via myGov, SBR-enabled accounting software, or a registered tax agent.

  5. Lodge Your BAS and Pay: Submit your BAS by the due date and ensure any payment owing is made to the ATO to avoid penalties.

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