BAS & GST Calculator for Sole Traders
Calculate GST collected, paid, and net Business Activity Statement (BAS) obligations.
Australian BAS & GST Calculator
Calculate your Business Activity Statement (BAS) quarterly GST liabilities, input tax credits, and net sole trader business profits under ATO rules.
💼 Business Sales & Expenses
Mandatory if annual GST turnover reaches $75,000 or more.
How ATO BAS & GST Work for Australian Sole Traders
The Goods and Services Tax (GST) is a flat **10% tax** levied on most goods, services, and items sold or consumed in Australia.
The 1/11th Rule for GST Extraction
Because prices in Australia are displayed inclusive of GST, the actual GST amount contained in a sale or expense is calculated by taking **1/11th of the total price**.
Worked Example: $120,000 Revenue & $30,000 Expenses
| Item Category | Gross Amount (GST-Inc) | GST Portion (1/11th) |
|---|---|---|
| Business Sales Revenue | $120,000 | $10,909 Collected |
| Business Expenses | $30,000 | $2,727 Credits Claimed |
| Net BAS GST Payable to ATO | $10,909 - $2,727 | $8,182 / Year ($2,045.50 / Qtr) |
Frequently Asked Questions (FAQ)
When are quarterly BAS statements due to the ATO?
Quarter 1 (Jul-Sep) is due Oct 28; Q2 (Oct-Dec) is due Feb 28; Q3 (Jan-Mar) is due Apr 28; Q4 (Apr-Jun) is due Jul 28.
Educational Purpose Disclaimer
This calculator is provided for informational and educational estimation purposes only. All calculations and projections are based on standard mathematical formulas and assumed inputs. The output values should not be considered professional financial, legal, tax, or medical advice. ProCalc is not a registered financial advisor or licensed practitioner. Always consult a qualified professional (such as a Chartered Accountant, certified planner, or physician) before making major decisions.
What is the BAS & GST Calculator for Sole Traders?
The BAS & GST Calculator for Sole Traders is a simple accounting utility designed for Australian freelancers, contractors, and small business owners to estimate their Goods and Services Tax (GST) liabilities for Business Activity Statements (BAS).
Under Australian tax law, sole traders must register for GST with the Australian Taxation Office (ATO) if their annual business turnover is $75,000 or more (or $150,000 for non-profit organizations). Once registered, you must lodge regular BAS returns (typically quarterly) to report and pay GST:
• GST Collected (Sales): You must add a 10% GST to the price of the goods and services you sell to customers. You collect this tax on behalf of the government.
• GST Paid (Expenses): You can claim GST credits for the GST included in the business-related purchases you make (such as office equipment, software subscriptions, or raw materials).
• Net Tax Payable/Refundable: The final amount owed to the ATO is calculated as the difference between the GST you collected from sales and the GST credits you paid on business expenses:
- GST Collected > GST Paid: You pay the difference to the ATO.
- GST Paid > GST Collected: You receive a tax refund from the ATO.
This calculator simplifies quarterly reporting by computing your gross sales GST, deducting eligible business expense credits, and estimating your net quarterly or annual payment obligations.
How Does the BAS & GST Calculator for Sole Traders Work?
1. Input gross business sales. 2. Input business expenses. 3. Select GST registration status. 4. View GST collected, paid, and net BAS payable.
Formula & Calculation Method
Calculates GST collected as 1/11 of sales. Calculates GST paid as 1/11 of expenses. Net BAS payable = GST collected - GST paid.
Example Calculation
Revenue $121,000, Expenses $33,000. GST Collected = $11,000. GST Paid = $3,000. Net BAS payable = $8,000. Net Profit = $80,000.
Frequently Asked Questions
Calculates GST collected as 1/11 of sales. Calculates GST paid as 1/11 of expenses. Net BAS payable = GST collected - GST paid.
Disclaimer: This tool is provided for informational and calculation purposes. Output values are estimates based on standard user inputs.