A Guide to Understanding GST and BAS for Australian Companies
What is GST?
The Goods and Services Tax (GST) is a broad-based tax of 10% on most goods, services, and other items sold or consumed in Australia. Essentially, GST is a value-added tax levied on most transactions in the production process, with the end consumer ultimately bearing the cost. It is vital for Australian businesses to understand how GST works, as it directly affects pricing, invoicing, and financial reporting.

Businesses that have an annual turnover of $75,000 or more are required to register for GST. Once registered, businesses must charge GST on their taxable goods and services and remit it to the Australian Taxation Office (ATO). Importantly, businesses can also claim credits for the GST included in the price of goods and services they purchase for their business.
Understanding BAS
The Business Activity Statement (BAS) is a form submitted to the ATO by registered business entities to report their tax obligations. The BAS helps businesses report and pay several tax obligations, including GST, Pay As You Go (PAYG) installments, PAYG withholding tax, and other taxes.
Businesses are required to submit their BAS either monthly, quarterly, or annually, depending on their GST turnover. Timely submission of the BAS is crucial to avoid penalties and stay compliant with ATO requirements.

Components of BAS
The BAS form includes several fields where businesses must report various tax obligations:
- GST on sales: Report all GST collected from sales during the period.
- GST on purchases: Report the total amount of GST credits claimed on business-related purchases.
- PAYG withholding: If you have employees, report the tax withheld from their wages.
- PAYG installments: Report any income tax paid in installments.
How to Lodge Your BAS
Lodging your BAS can be done through several methods, including online via the ATO's Business Portal, through your registered tax agent, or by mailing a paper form. The ATO encourages electronic submissions as they are faster and more efficient.

Before lodging your BAS, ensure all amounts reported are accurate and supported by your accounting records. It's a good practice to review your financial statements and ensure all transactions are correctly recorded to avoid errors.
Common Mistakes to Avoid
When dealing with GST and BAS, businesses often encounter common pitfalls such as:
- Incorrectly calculating GST: Ensure you apply the 10% GST rate correctly on all taxable sales.
- Missing submission deadlines: Late submissions can result in penalties. Mark your calendar with the due dates for your BAS submissions.
- Neglecting record-keeping: Maintain accurate records of all transactions to support your claims and calculations.
Understanding GST and BAS is essential for the smooth operation of any Australian business. By staying informed and organized, businesses can ensure compliance with ATO requirements and focus on growth and success.