Taxable, GST-Free and Input-Taxed: How GST Treatment Is Decided in Australia

Introduction: Why Getting GST Treatment Right Matters

Every time you sell something in your business—whether it’s a product, a service, or even a one-off asset—you must decide: do I charge GST, or not? The answer isn’t always obvious. Charge GST when you shouldn’t, and you’ll overprice your goods and face angry customers. Fail to charge GST when you should, and the ATO will come knocking for the missing 10%, plus penalties and interest.

In Australia, every supply falls into one of three buckets: taxable, GST-free, or input-taxed. The classification determines whether you add 10% to your price, whether you can claim back the GST on your business expenses, and how you report on your BAS. This article is your complete, plain-English guide to understanding how the ATO decides GST treatment. By the end, you’ll be able to classify your own supplies with confidence, avoid the most common traps, and use our free GST calculator to get the numbers right every time.

The Three GST Classifications at a Glance

Before diving into the legal tests, let’s compare the three categories side by side. This table is your quick-reference cheat sheet.

ATO Warning: “If you make both taxable and GST-free or input-taxed supplies, you must keep separate records and apportion your input tax credits. Getting this wrong is one of the most common BAS errors we see.”

What Makes a Supply Taxable?

Under the A New Tax System (Goods and Services Tax) Act 1999, a supply is taxable if it satisfies all four of these conditions:

1. It is made for consideration – meaning you receive payment or some other benefit in return.
2. It is made in the course or furtherance of an enterprise – you’re running a business, not just a private hobby.
3. It is connected with Australia – the supply happens here, or the goods are delivered here, or the services are performed here.
4. It is not GST-free or input-taxed – if the law specifically exempts it, it falls into one of the other buckets.

If even one condition fails, the supply is not taxable. For example, selling your personal car on Facebook Marketplace is not in the course of an enterprise, so no GST applies. But if you’re a registered sole trader selling handmade furniture, every sale that meets the four tests is taxable—unless it’s specifically GST-free or input-taxed.

Connected with Australia: The Trap for Importers and Online Sellers

The “connected with Australia” test trips up many small businesses. A supply of goods is connected with Australia if the goods are delivered or made available here. Services are connected if the provider is an Australian resident and the services are performed here. For importers, the GST may be applied at the border under the low-value import rules, but the classification of your own onward sale still depends on where you sell. If you import goods and sell them to Australian customers, your sale is taxable (unless the goods themselves are GST-free, like certain medical devices).

GST-Free Supplies: When You Don’t Charge GST

GST-free supplies are a gift for your customers—and for you, because you can still claim all the GST on your business expenses. The ATO lists specific categories, and you must check the detailed rules for each. Here are the most common ones for small businesses:

• Basic food and beverages – bread, milk, fruit, vegetables, meat, eggs, tea, coffee (but not prepared meals, restaurant food, or hot takeaway).
• Most health and medical services – GP consultations, dental, physiotherapy, hospital treatment, and many allied health services.
• Education – courses provided by recognised educational institutions, including TAFE and university degrees, and certain professional development courses.
• Exports – goods exported from Australia within 60 days of the sale, and services provided to a non-resident who is outside Australia at the time.
• Child care – approved child care services.
• Certain charitable and religious supplies – by endorsed charities and gift-deductible entities.
• Water and sewerage – basic supplies.
• Sales of going concerns – the sale of an entire business as a going concern to a registered buyer.

Export Sales: The 60-Day Rule

If you sell goods to an overseas customer, the sale is GST-free only if the goods are exported within 60 days of the date of invoice or the date you receive payment (whichever is earlier). You must keep shipping documents, export declarations, and proof of delivery. If the goods stay in Australia longer, the sale becomes taxable. For services, the non-resident must be outside Australia when the service is performed, and the service must not be directly connected to real property in Australia.

Input-Taxed Supplies: No GST Charged, No Credits Claimed

Input-taxed supplies are the trickiest category. You don’t add GST to your price, but you also cannot claim input tax credits on the GST included in your expenses related to making those supplies. This can significantly increase your costs. The two most common input-taxed supplies for small businesses are:

• Residential rent – leasing a house, flat, or unit for residential purposes. (Commercial rent is taxable.)
• Financial supplies – lending money, providing credit, dealing in shares, bank fees, insurance (with some exceptions).

Other input-taxed supplies include the sale of existing residential property (not new homes or commercial property) and some precious metals. If your business makes input-taxed supplies, you may need to apportion your input tax credits if you also make taxable or GST-free supplies.

The Hidden Cost of Input-Taxed Supplies

Imagine you run a small business from a rented office (taxable) and also own a residential investment property (input-taxed). You pay $2,200 (including $200 GST) for accounting fees that relate to both activities. Because the residential rent is input-taxed, you can only claim the portion of the $200 GST that relates to the taxable business. If 60% of the accounting work is for the business and 40% for the rental property, you can claim $120 (60% of $200) as an input tax credit. The remaining $80 is lost—it becomes a cost to you.

Mixed Supplies and Apportionment: The Real-World Challenge

Very few small businesses sell only one type of supply. A café sells taxable coffee and GST-free bread. A bookkeeper provides taxable services but may also sublet a residential granny flat (input-taxed). When you have mixed supplies, you must apportion your input tax credits. The ATO accepts several methods:

• Direct attribution – allocate each expense directly to the taxable, GST-free, or input-taxed activity based on actual use.
• Turnover-based apportionment – use the ratio of your taxable and GST-free turnover to total turnover to claim credits on mixed expenses.
• Floor area method – for property-related expenses, use the proportion of floor space used for each activity.

You must keep clear records of how you calculated your apportionment. The ATO can ask for evidence, and if you can’t provide it, they may deny your credits.

Example: A Mixed-Use Home Office

Sarah runs a graphic design business from a dedicated room in her home. She also rents out a second bedroom on Airbnb (input-taxed residential accommodation). Her annual electricity bill is $3,300 (including $300 GST). The home office is 15% of the floor area, the Airbnb room is 10%, and the rest is private. Sarah can claim 15% of the $300 GST ($45) as an input tax credit for her business. The 10% related to the Airbnb is input-taxed, so no credit. The private portion is not claimable at all.

GST Registration and Your Supply Classification

Your GST registration status is directly linked to your supplies. You must register for GST if your annual GST turnover (total sales, not profit) is $75,000 or more ($150,000 for non-profit organisations). But here’s the key: when calculating your turnover, you include all supplies—taxable, GST-free, and input-taxed—except input-taxed supplies are excluded from the threshold calculation? No, actually, the GST turnover includes all supplies that are connected with Australia, but input-taxed supplies are included in the turnover calculation for registration purposes. Wait, let’s clarify: The ATO says your GST turnover is your total business income (not profit), excluding GST. It includes all supplies you make that are connected with Australia, even if they are GST-free or input-taxed. However, there are special rules: if you make only input-taxed supplies, you may not be required to register, but you can still register voluntarily. The $75,000 threshold applies to the total of all supplies. So if your residential rental income is $80,000, you must register for GST, even though the rent is input-taxed. But once registered, you still don’t charge GST on the rent; you just have to lodge BAS and may have limited input tax credits.

Voluntary registration is possible if your turnover is below the threshold. This can be beneficial if you make taxable or GST-free supplies and want to claim input tax credits on your start-up costs. But if you mainly make input-taxed supplies, voluntary registration is rarely advantageous because you can’t claim credits anyway.

Industry-Specific Nuances for Sole Traders, Importers, and Bookkeepers

Sole Traders and Freelancers

Most services provided by sole traders—graphic design, copywriting, consulting, IT support—are taxable. However, if you provide services to an overseas client who is outside Australia, the supply may be GST-free. Always check the export rules. If you’re a sole trader health professional (e.g., physiotherapist, psychologist), your services are likely GST-free, but you can still claim GST on your equipment and office expenses.

Importers and Online Sellers

When you import goods for resale, you pay GST at the border (unless the goods are valued under $1,000 and the overseas seller has not charged GST under the low-value import rules). That GST becomes an input tax credit on your next BAS, provided the goods are for a creditable purpose (i.e., you will sell them as taxable supplies). Your sale to the Australian customer is taxable. If you import goods that are GST-free (e.g., certain medical aids), the import itself may be GST-free, and your sale is also GST-free.

Bookkeepers and BAS Agents

Your bookkeeping services are taxable. But you may also have clients who make input-taxed supplies. When coding their transactions, you must correctly classify each expense as relating to taxable, GST-free, or input-taxed activities. A common mistake is claiming 100% of GST on expenses for a client who has residential rental income—only the portion related to taxable activities is claimable. Always ask your clients about their supply mix.

How to Use the GST Calculator for Different GST Treatments

Our free GST calculator at gstcalculatorau.com handles all three classifications effortlessly. Here’s how to use it for each scenario:

1. For taxable supplies: Enter the GST-exclusive price (e.g., $500 for a service). The calculator instantly shows the GST amount ($50) and the total price ($550). If you have a GST-inclusive price, enter it and the calculator extracts the GST component (divide by 11).
2. For GST-free supplies: Simply set the GST rate to 0% in the calculator. It will confirm that no GST is added. Use this to generate a tax invoice that clearly shows the supply as GST-free. The ATO requires you to state “GST-free” on the invoice.
3. For input-taxed supplies: Again, set the rate to 0%. The calculator will show the price without GST. Remember, you cannot claim input tax credits on related expenses, so keep a separate record of these transactions for your BAS.
4. Mixed supplies: Use the calculator for each individual supply. For apportionment, calculate the GST on your total mixed expenses, then apply your apportionment percentage. For example, if your total office expenses are $1,100 (including $100 GST) and your business use is 70%, you can claim $70. Use the calculator to work out the GST on the full amount first.

Bookmark the calculator and use it every time you issue an invoice or prepare your BAS. It eliminates mental arithmetic errors and gives you confidence that your numbers are ATO-ready.

Common Mistakes & Pitfalls

After 20 years of advising small businesses, these are the errors I see again and again:

• Charging GST on GST-free items: A café owner adds GST to a loaf of bread. The customer is overcharged, and the ATO will require you to refund the GST or pay it over.
• Claiming input tax credits on input-taxed supplies: A landlord claims GST on repairs for a residential rental property. The ATO will reverse the credit and apply penalties.
• Forgetting to apportion: Claiming 100% of GST on expenses that relate partly to input-taxed or private use. The ATO’s data matching easily picks up anomalies.
• Incorrectly treating exports: Assuming all overseas sales are GST-free without meeting the 60-day export rule or keeping proper documentation.
• Not registering when required: If your turnover exceeds $75,000 and you don’t register, the ATO can backdate your registration and demand GST on all sales from the date you should have been registered—even if you didn’t charge it to customers.
• Misclassifying new residential property: Selling a new house or apartment is taxable, not input-taxed. Only existing residential property is input-taxed.

Pro Tip: “When in doubt, check the ATO’s GST food and beverage guide or health services guide. The lists are detailed, and a quick check can save you thousands in penalties.”

Conclusion: Master Your GST Treatment Today

Understanding whether your supplies are taxable, GST-free, or input-taxed is the foundation of GST compliance. It affects your pricing, your cash flow, and your BAS. The rules are detailed, but with the cheat sheet, examples, and step-by-step guidance in this article, you’re now equipped to classify your sales correctly. Remember: when you charge GST, you’re collecting it on behalf of the ATO—not keeping it. When you don’t charge GST, know why, and adjust your input tax credit claims accordingly.

Bookmark this page as your go-to reference, and use our free GST calculator at gstcalculatorau.com to double-check every invoice and BAS. It’s fast, accurate, and designed specifically for Australian small businesses. Got a tricky classification? Drop us a line—we’re here to help you get it right.