How this usually works
Start with the decision points behind your search for how to register for GST. If revenue is approaching the threshold, or you’re launching a product, hiring, or going live on an ecommerce platform, you’ll want a clear GST start date and the right BAS cycle.
Once the decision is made, the rest follows a simple workflow: confirm you need to register, gather details, submit the registration, set up your accounting software, update invoices and price displays, then prepare for your first BAS.
Australian context to keep in view
- GST registration is required when your GST turnover is, or is likely to be, $75,000 or more in a 12-month period ($150,000 for non-profit bodies).
- Taxi and ride-sourcing drivers must register for GST from the first dollar earned.
- Register within 21 days of knowing you’ll meet the threshold; you can also register voluntarily under the threshold.
- You need an ABN before registering for GST; obtaining an ABN is free.
- Most small businesses report quarterly; monthly applies in some cases (for example, high turnover or regular refunds).
Step-by-step: how to register for GST online
- Check if you must register: forecast GST turnover and consider ride-sourcing rules.
- Get or confirm your ABN: you need a valid ABN to register for GST.
- Choose your GST start date: align with your first taxable sale or a clear change point.
- Pick accounting method: cash (recognise when paid) or accrual (recognise when invoiced).
- Choose reporting cycle: quarterly by default; monthly if required; annual may be available if you voluntarily register under the threshold.
- Apply to register: via ATO Online services, during your ABN application, or through a registered BAS/tax agent.
- Record your GST registration details: GST start date and cycle will drive your BAS due dates.
Registration can be quick if details are complete; some applications are reviewed before being finalised.
What you’ll need to apply
- ABN and business structure (sole trader, company, partnership, trust).
- Legal and trading names, business address and contact details.
- GST start date and preferred reporting cycle.
- Accounting method (cash or accrual) and software details (e.g. Xero, MYOB, QuickBooks).
- Bank account details and authorised contacts.
After you register: set up and stay compliant
Update invoices
Issue valid tax invoices with your ABN, identity, date, description, GST amount or statement that GST is included, and the buyer’s details where required.
Configure software
Enable GST codes, map accounts correctly, and test tax rates on common sales and purchases (including GST-free and input-taxed items).
Price display
For consumer pricing, show GST-inclusive prices. Update websites, menus, and ecommerce platforms so GST is applied correctly at checkout.
Plan BAS lodgements
Quarterly BAS are generally due 28 days after quarter-end; monthly activity statements are due on the 21st of the following month.
Common mistakes to avoid
- Backdating without adjusting invoices and BAS, leading to underpaid GST.
- Charging GST on GST-free or export sales, or claiming credits on ineligible purchases.
- Failing to switch from accrual to cash (or vice versa) correctly in software and on BAS.
- Not updating ecommerce platforms or point-of-sale to include GST from the start date.
- Missing the first BAS because the new registration changed your obligations mid-quarter.
Sole traders, startups and ecommerce
If you’re under the threshold, consider whether voluntary registration makes sense. You’ll be able to claim GST credits on business purchases, but you’ll also take on BAS lodgements. Startups with upfront costs, and ecommerce sellers using platforms that assume GST, often benefit from early clarity and correct software mapping.
- Sole traders can register for GST with their existing ABN and keep using cash accounting if suitable.
- Marketplace and platform settings must match your GST status from your start date.
- If your turnover fluctuates around the threshold, monitor monthly so you register within 21 days.
What to compare before you commit to a provider
Scope
Confirm it includes GST registration, ATO setup, software configuration, invoice templates, and support for your first BAS.
Software fit
Choose someone fluent in your tools (Xero, MYOB, QuickBooks) who can demonstrate correct GST code mapping and BAS workflows.
Turnaround and communication
Ask how quickly they can register you, and what support you’ll receive before the first BAS deadline.
Commercial fit
Compare fixed-fee setup vs ongoing packages, and whether you want compliance-only or broader advisory support.
Best next steps
Write down your GST start date, preferred accounting method, and BAS cycle. If you’re unsure, note your turnover forecast and cash flow profile. Then decide whether to self-register or have a BAS agent complete the work and configure your software in one go.
If you need help, use the form below to outline your business, timing, and software. We’ll guide you to the right support so you can register for GST and lodge your BAS with confidence.
Frequently asked questions
Do I need to register for GST?
You must register if your GST turnover is $75,000 or more ($150,000 for non-profits), or if you provide taxi or ride-sourcing services. You can register voluntarily under the threshold to claim GST credits.
How do I register for GST?
Have an ABN ready, choose your GST start date, accounting method (cash or accrual), and reporting cycle (usually quarterly). Register via ATO Online services, during your ABN application, or through a registered BAS/tax agent.
When do I have to register and report?
Register within 21 days of knowing you’ll hit the threshold. Quarterly BAS are due 28 days after each quarter; monthly statements are due on the 21st of the following month. Annual reporting may be available for some voluntarily registered businesses under the threshold.
Can I backdate or cancel GST registration?
You may be able to backdate to when you were required to register, but you could owe GST on earlier sales. You can cancel when you no longer meet the requirements, once all BAS obligations are finalised.
Cash vs accrual — which should I choose?
Cash suits many small businesses because you report GST when you get paid. Accrual reports GST when you invoice. Consider cash flow, customer payment terms, and your software’s capabilities.
What happens after I register?
Update tax invoices, enable GST codes in your accounting software, start charging GST on taxable sales, keep valid tax invoices for claims, and prepare for your first BAS.