How Does the ATO Calculator Work?
The ATO Calculator estimates the key components of your Business Activity Statement (BAS):
- GST — Net payable or refundable (GST Collected − GST Paid)
- PAYG Withholding — Total tax withheld from employee wages
- Superannuation Guarantee — Employer contributions based on income
All calculations follow current ATO guidelines for the 2025/26 financial year.
What Is a BAS?
A Business Activity Statement (BAS) is a form that Australian businesses use to report and pay their tax obligations to the ATO. It typically includes:
- GST (Goods and Services Tax)
- PAYG withholding
- PAYG instalments
- Superannuation contributions (reported separately)
This calculator helps you estimate your BAS liability so you can plan your cash flow and avoid penalties.
Who Benefits from the ATO Calculator?
This tool is designed for:
- Small business owners preparing their BAS
- Sole traders calculating quarterly obligations
- Accountants and BAS agents running client scenarios
- New businesses understanding their tax obligations
- Anyone reporting to the Australian Taxation Office
Frequently Asked Questions
What is an ATO Calculator?
An ATO Calculator helps Australian taxpayers, businesses, and BAS agents estimate their BAS liabilities, including GST, PAYG withholding, and Superannuation Guarantee.
What is GST and how is it calculated?
GST is a 10% tax on most goods and services in Australia. Net GST is GST Collected minus GST Paid.
What is PAYG withholding?
PAYG withholding is the amount employers withhold from employee wages and send to the ATO.
What is Superannuation Guarantee?
Superannuation Guarantee is the minimum percentage of employee earnings employers must contribute to a super fund. The current rate is 11.5% (2025/26).
How often do I need to report to the ATO?
Reporting frequency depends on your business size and registration — monthly, quarterly, or annual.
Is my data stored anywhere?
No. All calculations run locally in your browser. No data is sent to any server.