If you’re running a business in Australia, one of the most common questions is: “Do I need to register for GST?” Whether you’re a sole trader, contractor, small business owner or freelancer, understanding GST (Goods and Services Tax) is essential to staying compliant and avoiding costly penalties.

In this guide, we’ll break down everything you need to know—thresholds, rules, timing, common errors and how to stay on top of it all.

What is GST?

GST (Goods and Services Tax) is a broad-based tax of 10% on most goods, services and other items sold or consumed in Australia.

If your business is registered for GST, you need to:

• Add 10% GST to your sales invoices
• Lodge Business Activity Statements (BAS)
• Pay the GST you collect (minus GST credits) to the ATO
  

• When do you have to register for GST?

  You must register for GST if:

  Situation	GST Registration Requirement
  Your GST turnover is $75,000 or more per year	Compulsory
  You’re a non-profit with $150,000+ turnover	Compulsory
  You provide taxi, ride-share or delivery services (Uber, DiDi, etc)	Always compulsory, regardless of turnover
  You want to claim GST credits on purchases	Optional (voluntary registration)

  What is GST turnover?

  Your GST turnover is your gross business income, excluding:

  • GST itself

  • Sales not connected to Australia

  • Input-taxed sales (e.g. residential rent, some financial services)

  This turnover is calculated on a rolling 12-month basis, not just the financial year. That means if you’re close to the threshold, you need to monitor your income regularly.

  What happens if I don’t register and I go over the threshold?

  If you fail to register once you’ve crossed the threshold, the ATO can charge you:

  • Backdated GST on past sales (even if you didn’t charge customers)

  • Interest and penalties

  • Additional compliance checks or audits

  Even if it’s an honest mistake, you may still be liable. That’s why it’s important to register as soon as you know your turnover will exceed $75,000.

Can I register for GST before hitting $75,000?

Yes. This is called voluntary registration. Many new businesses choose to register early if they:

• Want to claim GST credits on start-up expenses
• Appear more established to clients or suppliers
• Plan to exceed the threshold soon

But remember, once registered, you must:

• Charge GST on sales
• Lodge BAS regularly (monthly, quarterly, or annually)
• Keep proper records and tax invoices

What can I claim GST on?

If you’re registered for GST, you can claim GST credits on:

• Office rent and utilities
• Marketing and advertising
• Tools, equipment, computers
• Accounting, legal, and consulting fees
• Vehicle expenses and fuel (if used for business)

However, you must:

• Hold a valid tax invoice for purchases over $82.50 (including GST)
• Only claim for business-related expenses
• Keep records for at least five years

Common GST mistakes (and how to avoid them)

Here are some common traps to avoid:

1. Not registering on time
   Track your turnover regularly to avoid missing the threshold.
2. Charging GST without being registered
   It’s illegal to collect GST unless you’re registered. Refund any GST wrongly charged.
3. Not issuing tax invoices
   If your customers are GST-registered, they’ll need valid tax invoices to claim credits.
4. Claiming GST on personal expenses
   Only claim the business-use portion of expenses.
5. Forgetting to cancel registration when ceasing business
   If your business closes or drops below the threshold, you may still have BAS obligations until you cancel.

FAQs

Do I have to register for GST as a sole trader?
Only if your GST turnover exceeds $75,000. Otherwise, it’s optional.

Is GST registration the same as an ABN?
No. Your ABN identifies your business. GST registration is separate and done through the ATO.

How do I register for GST?
You can register online via the ATO Business Portal, through your myGov account (linked to your ABN), or via a registered tax agent.

Can I cancel my GST registration?
Yes, if your turnover falls below the threshold or you stop running the business. Just notify the ATO.

What happens after I register?
You’ll need to start charging GST, lodging BAS and paying GST collected minus eligible credits.

Summary

GST registration isn’t optional once your turnover hits $75,000. But even before that, registering voluntarily can help your business recover GST on expenses and appear more professional.

The most important thing? Stay informed, monitor your income, and ensure you meet your reporting obligations.

Need help understanding GST and your tax obligations?

Whether you’re just starting out or close to the threshold, it pays to get clear advice. Latitude Accountants can help you make informed decisions so you avoid penalties, maximise deductions and stay compliant.

Contact Latitude Accountants today for smart, practical advice tailored to your situation.

📞 Contact Latitude Accountants
📧 info@latitudeaccountants.com.au
🌐 www.latitudeaccountants.com.au

Disclaimer

This information is general in nature and does not constitute financial or tax advice. Legislation and policies may change and individual circumstances vary. Always consult a registered tax agent or the ATO for advice specific to your situation.