How registering for GST usually works
A solid register for GST process starts with confirming eligibility and timing. That means checking your GST turnover, business structure and ABN status, then choosing a GST start date that matches how you trade and invoice.
From there the work breaks into four practical steps:
- Decide on method and cycle: choose cash or accrual accounting and a BAS cycle (quarterly is common; monthly if turnover is high or you want faster credits).
- Apply to register: lodge the GST registration via ATO Online services (or through your registered tax/BAS agent).
- Set up correctly: configure tax codes in Xero, MYOB or QuickBooks, turn on tax invoices, and map GST for common transactions.
- Embed the workflow: keep valid tax invoices, reconcile regularly, and prepare for BAS lodgment on schedule.
Done well, you avoid charging the wrong GST, missing credits, or creating BAS rework later.
Australian rules to keep in view
- You must register for GST when your GST turnover is $75,000+ (or $150,000+ for non-profits). GST turnover is your business income excluding GST, not your profit.
- Taxi and ride‑sourcing drivers must register for GST regardless of turnover.
- When you become aware that you will cross the threshold, register within 21 days.
- You can register voluntarily under the threshold. You’ll then charge GST on taxable sales and can claim GST credits on eligible purchases.
- Choose cash or accrual accounting for GST: cash aligns with when money moves; accrual aligns with invoices and bills.
- Most small businesses lodge BAS quarterly; some choose monthly. Annual is limited and still needs instalments if registered.
- An ABN is required before you register for GST. If you need one, see our ABN guide and support: ABN Registration Help.
General information only. Always confirm your position with the ATO or a registered tax/BAS agent.
What to compare before you commit to a provider
Scope
Confirm the proposal actually covers what you need to register for GST, including ABN check, application, software setup, tax codes, invoice settings and first BAS support.
Registration
Use a registered BAS or tax agent for compliance work. Ask for their registration number and relevant experience with your industry.
Software fit
Ensure confidence with your platform (Xero, MYOB, QuickBooks). Ask how they will map GST on common transactions, international sales, and reimbursements.
Turnaround and communication
Get clear timeframes, handover steps, and how urgent questions are handled during BAS periods.
Commercials
Compare fixed vs hourly pricing, inclusions for the first BAS, and ongoing support options.
ATO support
Check whether they will liaise with the ATO if questions arise and how they manage authorisations.
Checklist: what you’ll need to register for GST
- Active ABN, legal/trading names and business structure details.
- Principal business activity and estimated turnover for the next 12 months.
- Preferred GST start date and accounting method (cash or accrual).
- Preferred BAS cycle (monthly or quarterly) and contact details for the authorised person.
- Accounting software access to update tax settings and invoice templates.
Common mistakes to avoid
- Choosing the wrong start date and needing to back‑charge or amend BAS later.
- Charging GST on GST‑free items (or missing GST where it applies).
- Failing to issue valid tax invoices, leading to denied credits for customers or yourself.
- Software tax codes not configured, causing incorrect BAS figures.
- Not keeping records to support GST credits or mixing personal and business expenses.
Best next steps
Write down the outcome you need: register for GST by a specific date, set up software correctly, and lodge the first BAS without surprises. Then shortlist providers who explain the process clearly and show how they’ll prevent rework.
If you are still setting up the business, explore these pages next to round out your foundation:
- New Business Accounting Checklist to map your first 90 days.
- Business Structure Advice if your structure is still undecided.
- BAS Agent Services for ongoing BAS and GST support.
Frequently asked questions
Who must register for GST?
You must register for GST if your GST turnover is $75,000 or more ($150,000 for non‑profits) or if you provide taxi/ride‑sourcing services at any turnover. If you expect to cross the threshold, register within 21 days of becoming aware.
How do I register for GST?
Ensure you have an ABN, then apply through ATO Online services (via myGov for individuals/sole traders, or Online services for business for companies, partnerships and trusts) or ask a registered BAS/tax agent to handle it. Choose a GST start date, accounting method and BAS cycle during the process.
Do I register for GST as a sole trader?
Yes, the same turnover rules apply to sole traders. If your GST turnover is $75,000+ (or you drive for ride‑sourcing), you must register. You can also register voluntarily below the threshold.
How long does it take?
With an active ABN and complete information, approval is often within 1–2 business days. Allow more time if the ATO requests additional verification.
What happens after I register?
Update your accounting software tax settings, start issuing valid tax invoices, record GST on purchases, and lodge BAS on time. Keep proper records to support credits and adjustments.
Where can I get ongoing help?
For setup plus BAS lodgments, see BAS Agent Services. For broader tax support, see Tax Accountant. If you are still comparing options, visit our Accounting services hub or Help Centre.