GST Calculator AUSTRALIA

Q: How do I remove GST from a total price?

If you have a GST-inclusive amount , you can work out the GST portion by dividing the total by 11 in Australia (10% GST) Example: $110 ÷ 11 = $10 GST

Q: Are all sales subject to GST?

No. Some are GST-free (like basic food, health, education) or input taxed (like residential rent, financial services).

Q: How do I calculate GST turnover for threshold?

Add up your gross business income (ex-GST) for the year, excluding asset sales and input-taxed sales.

Q: How often do I calculate GST for reporting?

When lodging your BAS , it is usually quarterly , sometimes monthly.

Q: What happens if I miscalculate GST?

You may need to correct it in your next BAS or the ATO may issue penalties.

Instantly Calculate GST Inclusive, Exclusive, or Reverse for Australia

Australian GST Calculator

Tip: Australia’s standard GST rate is 10%. Some items, like fresh food and medical services, are GST-free. Visit the Australian Taxation Office (ATO) for details on indirect taxes and compliance.

Calculating GST in Australia is simple and easy with our GST Calculator Australia. Findout ESTIMATED BAS and GST TURNOVER Whether you’re in NSW, QLD, VIC, WA, or anywhere nationwide, you can instantly add GST, remove GST, or work out GST-inclusive and exclusive total amounts. With only one click, you’ll get the exact GST amount, the total price, and a clear breakdown for any invoice or receipt by using our GST Calculator.

Our GST Calculator tool is more than just a calculator. This Reverse GST Calculator Australia and Newzealand adds or removes and works in reverse, starting from a total to determine the base price. Perfect for small businesses, freelancers, sole traders, and taxi or rideshare drivers (including Uber).

Our GST calculator is designed around Australia’s 10% GST rate, but flexible enough for global comparisons like New Zealand GST (15%) or India GST (18%). Whether you’re managing invoices, planning a BAS return, or checking GST registration status, this tool saves time, reduces errors, and keeps you aligned with Australian Taxation Office (ATO) rules.

⚠️ Disclaimer: This calculator is designed as a helpful tool for businesses and individuals. For complex cases or final confirmation, always check your figures against the ATO’s online services or seek advice from a registered tax adviser.

Calculate GST in New Zealand with our GST Calculator NZ

How to Calculate GST in Australia?

Whether you’re a freelancer in Sydney, a rideshare driver in Brisbane, or a small business owner in Melbourne, figuring out GST doesn’t have to be confusing. Our tool makes working out the Goods and Services Tax (GST) simple. It’s a standard GST Calculator Australia that follows the rules set by the Australian Taxation Office (ATO) to give you fast, reliable results. Follow the steps below for quick results.

Reverse GST Calculator – Add or Remove GST

Looking for a Reverse GST Calculator? The Australian GST Calculator helps you add GST to a base price or remove GST from a total amount. This is useful for invoices, receipts, and small business quoting.

Steps to calculate GST:

Enter the price amount (e.g., $100).
Select “Add GST” to calculate the total including GST, or “Remove GST” to work out the GST-exclusive price.
Click “Calculate” to instantly see the GST amount and the total price.
Use “Clear” to reset.

Remember:

Some goods and services are GST-free in Australia (e.g., fresh food, certain health and education services). Always check the ATO GST-free list for confirmation.
Keep the GST rate at 10% (the standard Australian GST rate under the A New Tax System (Goods and Services Tax) Act 1999), or adjust if needed.

The Goods and Services Tax (GST) in Australia is a 10% value-added tax applied to most goods and services sold domestically. According to the Australian Taxation Office (ATO), GST is designed to ensure that consumers contribute tax at the point of purchase. Some goods and services, such as basic food items, healthcare, childcare, and education, are GST-free.

Who needs to Register for GST?

Businesses and individuals carrying on an enterprise in Australia must register for GST if they meet certain criteria set by the ATO:

Businesses wanting GST credits
Even if below threshold, voluntary GST registration allows you to claim input tax credits on purchases.
Small businesses & sole traders
Must register once their annual GST turnover reaches $75,000 or more.
Non-profit organizations
Have a higher registration threshold of $150,000 annual turnover.
Ride-sourcing and taxi services (e.g., Uber, Ola, Didi, taxis)
Must register for GST from their very first dollar earned (no threshold applies).

What is the GST Turnover threshold in Australia?

The GST turnover threshold is the annual income limit that determines whether a business must register for GST:

$75,000
Standard GST registration threshold for businesses and sole traders.
$150,000
Threshold for charities and not-for-profits.
$0 (compulsory registration)
Applies to ride-share and taxi services.

ATO Definition: GST turnover includes your gross business income (excluding GST) but does not include wages, bank interest, or the sale of capital assets.

Once registered, you’ll need to include GST on taxable sales, issue valid tax invoices, and lodge BAS statements regularly. For a registration guide, visit GST Registration in Australia.
Always check with the ATO if you’re unsure, as penalties may apply for late registration.

GST Inclusive vs Exclusive Calculations

Understanding the GST calculation formula is essential for working out both GST-inclusive and GST-exclusive prices. In Australia, the standard Goods and Services Tax (GST) rate is 10%, and all calculations are based on this rate unless stated otherwise. These formulas are ATO-compliant and apply to businesses, freelancers, and individuals.

How do I calculate GST from a total amount?

If the price is GST-inclusive, you can work out the GST component using the ATO’s 1/11th rule:

Formula: GST = Total Price ÷ 11
Example: If the GST-inclusive price is $110, then GST = $110 ÷ 11 = $10.
The net amount (before GST) = $110 − $10 = $100.

This method is especially useful for invoices and receipts where only the total amount is displayed.

What is the GST 1/11th rule in Australia?

The 1/11th rule is an ATO-recognised formula used to determine the GST portion of a GST-inclusive amount:

When the price includes GST → GST = 1/11th of the total.
When the price excludes GST → Add 10% (× 0.1) of the net price.

ATO Guidance: This formula simplifies BAS reporting and ensures accuracy when separating GST from gross amounts.

How do I remove GST from a price?

To calculate the GST-exclusive price from a GST-inclusive amount:

Formula: GST-Exclusive Price = Total Price ÷ 1.1
Example: $110 ÷ 1.1 = $100 (net price before GST).
GST portion = Total Price − GST-Exclusive Price = $110 − $100 = $10.

This is commonly called the “reverse GST calculation” in Australia.

Which Goods and Services are GST-free in Australia?

The Australian Taxation Office (ATO) defines certain goods and services as GST-free, meaning businesses don’t charge GST (10%) on these sales. Certain items, such as everyday groceries and select services, are exempt from GST. This table will help you quickly see which items are taxed and which ones aren’t. Understanding these differences can make managing your budget and purchases a lot easier, so you’ll always know what to expect when it comes to GST.

Non Taxable Items	Taxable Items
Basic food items (e.g., bread, milk, fruit, vegetables)	Most food items (excluding basic food items)
Education (e.g., school fees, university fees)	Clothing and footwear
Healthcare (e.g., doctor visits, hospital stays)	Accommodation (e.g., hotels, motels, Airbnb)
Public transport (e.g., buses, trains, trams)	Restaurant meals and takeaway food
Water and sewerage services	Alcohol and tobacco
Exports	Petrol and diesel
Financial services (e.g., banking, insurance)	Household goods and appliances
Land	Electronics and computers
Residential rent	Telecommunications services
Donations to registered charities	Professional services (e.g., legal, accounting)

GST for Small Businesses & BAS Reporting

If you run a small business in Australia, you’ll need to report GST using a Business Activity Statement (BAS). This is simply a form that shows how much GST you’ve collected on your sales, minus any GST credits from your business purchases. Once worked out, it tells you whether you need to pay the ATO or if you can claim a refund. Most businesses lodge BAS quarterly, and it’s easy to submit online through the ATO portal, via myGov, or with help from a registered BAS or tax agent. To claim GST credits, just make sure you’re registered for GST, the expense is for business use, and you’ve got a valid tax invoice. For further details, check our page about How to lodge BAS in Australia.

Why Use Our ATO-Aligned GST Calculators?

Managing GST in Australia can be complex, especially when dealing with invoices, BAS returns, or turnover checks. This calculator is designed to make the process faster, more accurate, and fully aligned with Australian Taxation Office (ATO) rules.

ATO-Aligned

Designed to follow Australian GST legislation and rules.

Flexible

Handles GST-inclusive and GST-exclusive amounts.

User Friendly

Small businesses, freelancers, sole traders, and not-for-profits.

Time-Saving

Instant GST breakdowns for invoices, for inclusive and exclusive GST.

Frequently Asked Questions – GST Calculators

To add GST to a total (GST-exclusive price), multiply the price by 1.1 in Australia.
Example: $100 × 1.1 = $110 (includes $10 GST).

To remove GST from a total (GST-inclusive price), divide the amount by 1.1 in Australia.
Example: $110 ÷ 1.1 = $100 before GST

If you have a GST-inclusive amount, you can work out the GST portion by dividing the total by 11 in Australia (10% GST)
Example: $110 ÷ 11 = $10 GST

No. Some are GST-free (like basic food, health, education) or input taxed (like residential rent, financial services).

You can create simple Excel formulas:
Add GST (Australia 10%): =A1*1.1 (if A1 is the price excluding GST)
Remove GST (Australia 10%): =A1/1.1 (if A1 is the price including GST).

Add up your gross business income (ex-GST) for the year, excluding asset sales and input-taxed sales.

When lodging your BAS, it is usually quarterly, sometimes monthly.

Yes. Some Casio calculators have TAX+ and TAX– buttons. You can set 10% once, and it will add or remove GST for you.

You may need to correct it in your next BAS or the ATO may issue penalties.

Final Word: Take the Stress Out of GST

Dealing with GST can feel like a chore. But due to our Online and Easy GST Calculator ATO Aligned, now it’s easy to send out invoices, to stay on top of BAS, or just figure out if you even need to register in any state of Australia, or simply know how to calculate GST from the total. Everything here is designed to match ATO standards.

Clear answers. No guesswork. These are perfect tools that help you get GST done right.

Jeff Pfaff

Jeff Pfaff is a finance and digital tools enthusiast who specializes in simplifying GST and BAS calculations for Australians. He develops practical online calculators to help small businesses and individuals stay compliant with ATO requirements. Jeff also shares guides on tax compliance, business efficiency, and financial literacy.