BAS Business Activity Statement Calculator

About the BAS Calculator Tool

The BAS Business Activity Statement Calculator helps Australian sole traders, partnerships, and small businesses estimate their periodic BAS payments, as required by the Australian Taxation Office (ATO). The tool includes GST, PAYG withholding, and PAYG instalments to give a complete overview of your BAS obligations.

What is a Business Activity Statement?

A Business Activity Statement (BAS) is a form submitted to the ATO to report and pay tax obligations including GST, PAYG instalments, PAYG withholding, and other taxes. It is usually filed monthly or quarterly depending on your reporting obligations.

Why Use the BAS Calculator?

• Estimate your GST payable/refundable
• Calculate PAYG withholding for employees
• Compute PAYG instalment tax for sole traders
• Plan your cash flow based on BAS payments
• Ensure you're prepared ahead of ATO lodgement

How It Works

Simply input your total GST collected on sales, GST paid on purchases, PAYG withholding for employees, and your business income and instalment rate. The calculator returns an estimate of:

• GST Payable (GST Collected – GST Paid)
• PAYG Withholding Amount
• PAYG Instalment Amount (Income × Rate)
• Total BAS Payment Due

Who Should Use This Tool?

This calculator is designed for business owners, freelancers, bookkeepers, and anyone registered for GST or PAYG in Australia. Whether you're a new ABN holder or a growing SME, this tool simplifies compliance and tax planning.

Disclaimer

This tool provides estimates only and does not account for ATO credits, adjustments, or other taxes. For accurate compliance and submission, consult with a registered BAS or tax agent.

ATO Lodgement Dates

BAS is usually due quarterly (July–September, October–December, etc.) or monthly. Lodgement deadlines and frequency depend on your registration. Always confirm your due date with the ATO to avoid penalties.