If you run a business in Australia, you’ve probably seen “GST” and “VAT” used interchangeably in conversations about tax. But Australia doesn’t use VAT. It uses a Goods and Services Tax, and the distinction matters more than most guides let on.
GST is a 10% tax on most goods, services, and other items sold or consumed in Australia, administered by the Australian Taxation Office. It was introduced in July 2000 under the A New Tax System Act, replacing a patchwork of older indirect taxes. The rate has stayed at 10% since then, and as of 2026, the ATO confirms no legislated change to that rate.
What is GST in Australia?
Australia uses GST, not VAT. The standard rate is 10%. Registered businesses collect GST on taxable sales and can generally claim GST credits on eligible business purchases. GST is reported to the ATO through the Business Activity Statement. The registration threshold for most businesses is $75,000 in GST turnover, or $150,000 for non-profit organisations.
Is GST the same as VAT?
It depends. Both are consumption taxes collected at each stage of the supply chain, so the mechanics overlap. VAT (Value-Added Tax) is the term used across the EU, the UK, and many other countries. Australia deliberately chose a different name when it designed its system, and there are structural differences in how exemptions and credits work. For practical purposes, if someone from outside Australia asks whether you charge VAT, the answer is: “We charge GST. Same concept, different rules.”
That’s really all the comparison space this topic needs. If you’re operating in Australia, Australian GST rules are what apply to your invoices, your BAS, and your bank account.
What Is VAT or GST In Australia?
How GST works
The basic flow is straightforward once you see it end to end.
Your business sells a taxable product or service. You charge the customer GST on top of your price. You collect that GST. You also pay GST on your own eligible business purchases. At the end of each reporting period, you report the difference to the ATO through your BAS.
A concrete example
A GST-registered consultant charges $1,000 for a project. The GST-inclusive invoice is $1,100. The $100 is GST. During the same period, the consultant buys a $550 (GST-inclusive) laptop for work. The GST on that purchase is $50. The net GST owed to the ATO is $100 minus $50, so $50.
That net position is what you report. Simple in theory. Where it gets messy is classification.
GST rate and calculation
The GST rate in Australia is 10%.
To add GST to a price
multiply by 1.10. So $1,000 becomes $1,100.
To extract GST from a GST-inclusive amount
divide by 11. So $1,100 ÷ 11 = $100 GST.
If you’re quoting prices to consumers, Australian Consumer Law generally requires GST-inclusive pricing. B2B invoices commonly show both the GST-exclusive amount and the GST component.
For quick calculations, ProfitBooks offers a free GST calculator that handles both directions. And if you want the full breakdown of the maths, the guide to calculating GST in Australia walks through every scenario.
Who needs to register for GST?
This is where most founders trip up. The ATO’s current guidance states that you must register for GST when your GST turnover reaches $75,000 (or $150,000 for non-profit organisations). Businesses providing taxi, limousine, or ride-sourcing services must register regardless of turnover.
The critical word there is GST turnover, not revenue, not profit.
How the GST turnover test actually works
GST turnover includes the total payments (excluding GST) you’ve received or are likely to receive in a rolling 12-month period for taxable supplies. It also includes a forward-looking test: if you expect to reach the threshold in the current month plus the next 11 months, you’re required to register.
This trips people up constantly. A business with $80,000 in GST turnover but only $30,000 in profit still crosses the threshold. And you don’t wait until the end of a financial year to check. The rolling 12-month window moves with you.
⏰
The ATO expects you to register within 21 days of reaching or expecting to reach the threshold. Miss that window and you may owe GST on sales made since the date you should have registered, not the date you actually did.
Voluntary registration
If you’re below $75,000, you can still register voluntarily. This makes sense for some startups because it lets you claim GST credits on business purchases and can make your business appear more established to B2B clients who expect tax invoices. The trade-off is that you then have to charge GST on your sales and lodge BAS, which adds admin overhead. For a business with mostly consumer clients and low input costs, voluntary registration might cost more in time than it saves.
GST-free vs input-taxed: the distinction that catches people
Not everything attracts GST. But the two categories of “no GST charged” work very differently.
| GST treatment | GST charged on sale? | GST credits on related purchases? |
|---|---|---|
| Taxable | Yes | Generally yes |
| GST-free | No | Generally yes |
| Input-taxed | No | Generally no |
GST-free supplies include many basic foods, most health and education services, and certain exports. You don’t charge GST on these, but you can still claim credits for the GST you paid on inputs related to making those sales.
Input-taxed supplies, such as most financial services and residential rent, are different. No GST is charged, and you generally cannot claim GST credits on the related purchases either.
Treating GST-free and input-taxed as the same category is one of the most common chart-of-accounts errors I’ve seen in small business files. A business selling a mix of taxable and input-taxed supplies needs to apportion GST credits carefully. Get this wrong and you’ll either over-claim (which the ATO will notice) or under-claim (which just costs you money).
GST credits
If your business is registered, you can generally claim back the GST included in the price of things you buy for your business. These are GST credits (sometimes called input tax credits).
To claim a GST credit, you generally need a valid tax invoice from the supplier. For purchases over $82.50 (GST-inclusive), the ATO requires a tax invoice that shows the supplier’s ABN, the date, a description of the items, and the GST amount. Keep these. If you’re audited and can’t produce the invoice, the credit gets denied.
GST reporting and BAS
GST is reported through the Business Activity Statement. Most small businesses lodge quarterly, but monthly reporting applies if the ATO directs it or if your GST turnover exceeds $20 million.
Quarterly BAS is generally due on the 28th of the month after the quarter ends. If you use a registered tax agent or BAS agent, you may get extended lodgement dates.
The BAS itself reports your total sales, GST collected on sales, GST paid on purchases (credits), and the net amount you owe or are owed. You lodge through the ATO’s Online services for business portal, through your tax agent, or through compatible accounting software.
A real friction point that rarely appears in guides
Founders who register for GST often don’t set up a separate GST holding account. They see the collected GST hit their main bank account, mentally count it as revenue, and then face a cash flow shock when the BAS is due. The community fix, discussed repeatedly in small business forums, is dead simple. Open a separate bank account. Every time you receive a payment, transfer the GST component (divide the GST-inclusive amount by 11) into that holding account immediately. When BAS is due, the money is already sitting there.
Cash vs accrual reporting
You’ll also need to choose between cash and accrual GST accounting. Under cash accounting, you report GST when you receive or make payments. Under accrual, you report when you issue or receive invoices. For most small businesses, cash accounting is simpler and aligns with actual bank movements. The cash vs accrual accounting guide covers the decision in detail.
Common GST mistakes small businesses make
Misreading the turnover threshold. Founders assume GST kicks in when invoices exceed $75,000 in a financial year. The actual test is rolling 12-month GST turnover, and it includes a forward projection. Track it monthly.
Claiming GST on input-taxed purchases. If you buy something related to making input-taxed sales, you generally can’t claim the credit. Accounting software with separate GST codes for taxable, GST-free, and input-taxed items prevents this, but only if you set the codes up correctly from day one.
Missing the 21-day registration window. The ATO’s current guidance is clear: register within 21 days of exceeding or expecting to exceed the threshold. Late registration doesn’t just mean paperwork. It can mean backdated GST liability.
Poor invoice records. No valid tax invoice, no GST credit. It’s that blunt.
Where GST guidance falls short
If your business sells a mix of taxable, GST-free, and input-taxed supplies across multiple channels (say, an ecommerce store selling both physical goods and financial products), generic GST guides won’t get you to a correct BAS. The apportionment rules for mixed supplies are genuinely complex, and getting them wrong in either direction creates audit risk. In that situation, a BAS agent or tax adviser who understands your specific supply mix is worth every dollar. Don’t try to self-serve it from blog posts, including this one.
GST for international businesses
Non-resident businesses selling digital products, services, or low-value physical goods to Australian consumers may need to register for GST under Australia’s special rules. The ATO confirms that these rules apply regardless of whether the overseas business has a physical presence in Australia. If you’re selling to Australian consumers from overseas, check the ATO’s non-resident guidance directly.
Simplify your GST workflow
If you’re setting up GST codes, issuing tax invoices, and tracking credits manually, that’s time you’re not spending on your business. ProfitBooks automates GST-compliant invoicing, tracks input and output tax separately, and generates export-ready reports for BAS lodgement.
Frequently asked questions
What is GST in Australia?
GST is a 10% broad-based tax on most goods, services, and other items sold or consumed in Australia. It’s administered by the ATO.
Is GST the same as VAT?
Both are consumption taxes collected through the supply chain. Australia uses the term GST rather than VAT, and the specific rules differ from VAT systems in other countries.
What is the GST registration threshold?
$75,000 in GST turnover for most businesses, $150,000 for non-profit organisations, as confirmed by the ATO’s current guidance. Ride-sourcing operators must register regardless of turnover.
What’s the difference between GST turnover and profit?
GST turnover is the total of your taxable supplies (excluding GST), not your net profit. A business earning $80,000 in revenue but only $25,000 in profit still exceeds the threshold.
Can I voluntarily register for GST below the threshold?
Yes. Voluntary registration lets you claim GST credits on business purchases, but it also means you must charge GST on sales and lodge BAS. Weigh the admin cost against the credit benefit.
How do I calculate GST on a price?
Multiply the GST-exclusive price by 0.10 to get the GST amount, or by 1.10 for the GST-inclusive total. To extract GST from an inclusive price, divide by 11.
How often do I need to lodge BAS?
Most small businesses lodge quarterly. Monthly lodgement applies in certain cases. Quarterly BAS is generally due on the 28th of the month following the quarter.
Do I need a tax invoice to claim GST credits?
For purchases of $82.50 or more (GST-inclusive), yes. The invoice must show the supplier’s ABN, the date, a description, and the GST amount.
What happens if I register late for GST?
You may owe GST on all taxable sales made from the date you were required to register, not the date you actually registered. The ATO can also apply penalties.
What GST accounting method should I use?
Cash accounting reports GST when payments are received or made. Accrual reports when invoices are issued or received. Cash accounting is simpler for most small businesses and aligns with actual cash flow.
This article is general information only and isn’t a substitute for professional tax advice. Verify current rules through the ATO or a registered tax adviser.
Next step from here: if you’re newly registered, your first real task is getting your GST accounting software configured correctly. That’s where most of the early mistakes actually happen.
Get GST right from your first invoice
ProfitBooks codes GST correctly across taxable, GST-free, and input-taxed items, issues compliant tax invoices, and produces BAS-ready reports — built for Australian businesses.
