Free Online Australia GST Calculator - Australian Dollars ($)
Calculate Australia Goods and Services Tax (GST) instantly for Business Activity Statements (BAS), invoices, sales quotes, or personal expenses. Our calculator runs 100% in your browser, meaning your financial figures never leave your device, ensuring total privacy.
Australian GST Rate Reference
The standard GST rate in Australia is 10%, introduced in July 2000 and regulated by the Australian Taxation Office (ATO). While it applies to most transactions, there are some key exceptions:
- Standard Rate (10%): Applies to most retail items, electrical goods, clothing, professional fees, commercial rents, digital downloads, and taxi/rideshare fares.
- GST-Free Goods: Essential items that do not carry GST, such as basic fresh foods, clean tap water, standard medical procedures, prescription medicines, university fees, and some child-care services.
- Input-Taxed Sales: Financial services (like bank loans) and residential rents are input-taxed. No GST is charged on these sales, and businesses cannot claim GST credits for related purchases.
How to Add or Remove Australian GST manually
Calculating 10% GST manually is straightforward but follows specific rules:
- Adding 10% GST: Multiply the net price by 1.10 (e.g., $100.00 * 1.10 = $110.00 total). The GST portion is exactly 10% ($10.00).
- Removing 10% GST: Divide the gross price by 11 to isolate the GST component (e.g., $110.00 / 11 = $10.00 GST). To find the original pre-tax net amount, divide the gross amount by 1.10 (e.g., $110.00 / 1.10 = $100.00 net).
How to Use This Calculator
- Enter your pre-tax or post-tax amount in Amount (AUD $).
- The Tax Rate (%) defaults to the standard 10%.
- Click Add Tax to calculate the gross total from a net price.
- Click Remove Tax to extract the original pre-tax net amount from a gross price.
- View the instant result showing net price, tax amount, and gross total.
Privacy
No financial data, purchase totals, or invoice details are transmitted to any server. All calculations happen entirely in your local browser sandbox, making this safe for corporate financial planning and bookkeeping.
Source and Accuracy Notes
Last reviewed: July 2026. This page uses Australia's standard 10% GST rate for quick estimates. Product treatment, GST-free supplies, input-taxed sales, and business obligations should be confirmed with the Australian Taxation Office or a qualified tax professional.
Business Disclaimer
This calculator performs arithmetic only. It does not determine BAS reporting, GST registration, tax credits, exemptions, input-taxed treatment, or official accounting treatment.