Alex is Sprintlaw's co-founder and principal lawyer. Alex previously worked at a top-tier firm as a lawyer specialising in technology and media contracts, and founded a digital agency which he sold in 2015.
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Keeping your Australian Business Number (ABN) details current isn’t just housekeeping - it’s essential for staying compliant, getting paid on time and making sure government agencies, banks and customers can reach you.
If your business has moved, changed directors, switched trading names or updated contact details, you’ll need to update the Australian Business Register (ABR). In this guide, we’ll explain what an “ABR update” involves, who can make changes (including how it works for tax agents), and the practical steps to get it done quickly and correctly.
We’ll also cover how ABR updates interact with ASIC, GST and other registrations, and share best practices around authority, record-keeping and privacy so you can manage these changes with confidence.
What Is An ABR Update And Why It Matters
An ABR update simply means changing the details attached to your ABN on the Australian Business Register. The ABR is the central database government agencies use to identify your business for tax and other purposes.
When your details are correct, agencies like the ATO, as well as suppliers and customers who look up your ABN, see the right information. This helps with invoicing, tax registrations, government grants, and even things like insurance and finance applications.
Out-of-date details can cause missed notices, delayed BAS communications, incorrect GST status on invoices, and compliance risks if the wrong people are listed as business associates. If you’re unsure about your current listing, it’s easy to check if an ABN is active and see what the public record shows.
If you’re just getting started and weighing up whether you need an ABN at all, it’s worth understanding the advantages and disadvantages of having an ABN before you register - but once you do have one, keeping it updated is a must.
Which ABN Details Should You Keep Updated?
Any time your business circumstances change, review whether those changes need to be reflected on the ABR. Common updates include:
- Business location: Street address and postal address (important for notices and service of documents).
- Contact details: Email, phone and authorised contact person.
- Entity details: Changes to partners (for partnerships) or associates (for companies and trusts).
- Trading name or business name: If your trading name changes or you register/cancel a business name.
- Business activities: Main business activity (ANZSIC) if your operations materially shift.
- GST/PAYG status: Registering, cancelling or changing GST and PAYG withholding status.
- Cessation: If you stop trading or the entity is wound up.
A quick housekeeping tip: trading names and business names are different concepts, and they’re also different again from a company’s legal name. If you’re unsure, this primer on business name vs company name and the distinction between your entity name vs business name can help you work out what needs to change where.
If you’ve changed your principal place of business, think about whether you’re comfortable using a home address publicly (some details can be visible via ABN lookup). For companies, there are separate rules around registered offices and principal places of business - and many owners weigh up the pros and cons of using residential addresses for company registration.
Who Can Update ABR Details (Including Tax Agents)?
Updates can be made by people who are authorised to act for the business. Who that is depends on your structure.
Sole Traders
You (the ABN holder) can update your own details using your myGovID and linking to the business via Relationship Authorisation Manager (RAM), or by contacting the ABR if needed.
Partnerships
A partner or someone formally authorised by the partnership can update the ABR. Keep the list of partners current - this is often where details drift out of date.
Companies
A director, public officer or an authorised contact can update details. Make sure the people listed as associates still match your company records and ASIC filings.
Trusts
The trustee (or a director of the corporate trustee) or an authorised contact can make changes on behalf of the trust.
Tax Agents And BAS Agents
Tax agents and BAS agents can update client ABN details if they’re properly authorised. In practice, that means you should give your agent clear written authority and ensure they’re added as your authorised intermediary in ATO systems before they make any changes.
For clarity and audit trails, many businesses put a simple Letter of Authority to Act in place, or use a short-form Authority to Act form for each update request. This reduces the risk of disputes and helps agents demonstrate they had permission to act.
Step-By-Step: How To Update Your ABN On The ABR
The exact steps vary slightly depending on your structure and how you access government services, but the general process is straightforward.
1) Confirm What Needs Changing
Review your current ABR listing using ABN Lookup and note the fields that are outdated (address, contact person, business activity, associates). If multiple things have changed - for example, a new office location and a different director - list them clearly.
2) Gather Supporting Information
Have the new details ready and, if relevant, any supporting records (e.g. updated ASIC records for a change of company officeholder, or evidence of a new trading address). If an agent will submit the change, prepare your authority documents.
3) Access The ABR With The Right Credentials
Most businesses update via online government channels using digital identity. Make sure the person submitting is an authorised contact for the entity. If you’re using an agent, ensure they’ve been linked as your authorised intermediary first.
4) Submit The Update Promptly
Enter the new details carefully, check spelling and numbers, and submit. Where the ABR prompts you to review related registrations (GST or PAYG), update those settings at the same time if something has changed.
5) Keep Records And Confirm The Change
Save a copy of what you changed and when, along with any internal approvals or your agent’s signed authority. Re-check your public ABN listing after processing to confirm the updates display correctly.
When Should You Update?
Update as soon as practicable after a change - don’t wait for year-end. This reduces the risk of missing government notices and avoids confusion with customers and suppliers that rely on your ABN details to set up accounts and pay invoices.
Does An ABR Update Flow Through To ASIC, GST And Other Records?
Not always. The ABR is one source of truth for ABN-related details, but other registers have their own update requirements.
ASIC Company Register
Changing company directors, registered office or share structure must be reflected with ASIC separately. Updating the ABR doesn’t automatically update ASIC, and vice versa. If you’re navigating company filings, you may also encounter your ASIC Certificate of Registration and other company records that should match your ABR where relevant (e.g. principal place of business).
GST And PAYG Withholding
You can usually review and update GST and PAYG status as part of the ABR process, but if you forget, update through your tax agent or business portal. Make sure your invoices reflect the correct GST position after any change.
Business Names
Business names are managed on a separate register. If you’ve adopted or ceased a trading name, ensure your business name registration is current and appears in the “Also known as” section where appropriate. If you’re juggling multiple names, keeping clear on your entity name vs business name is important for accuracy across systems and contracts.
Banks, Insurers And Key Suppliers
Many third parties pull ABN data, but they also keep their own records. After you update the ABR, notify critical stakeholders directly (bank, insurer, payment gateways, major customers and suppliers) to avoid account disruptions.
Best Practice For Authorisations, Record-Keeping And Privacy
A smooth ABR update is as much about process as it is about forms. A few practical tips can save headaches later.
Use Clear Authority To Act
- Nominate internal authorised contacts and keep a simple register of who can liaise with government on your behalf.
- If engaging a tax agent or BAS agent, put a short Letter of Authority to Act on file for the period of engagement, or a transaction-specific authority for the particular change.
Keep A Clean Paper Trail
- Save submission receipts or screenshots, and note the date changes went live. This helps if you need to prove what the public record showed on a given date.
- Cross-check that updates align across the ABR, ASIC (if you’re a company), your invoicing details and your website footer.
Respect Privacy And Data Accuracy
- Only share the minimum information necessary with intermediaries and verify identity before releasing sensitive data.
- If you collect or publish business contact details online (for example, for staff listed as contacts), maintain a compliant Privacy Policy and a process to correct inaccurate information promptly.
Align Your Contracts And Stationery
- After an ABR update, refresh your quotes, invoices, terms and website to show the correct legal name, ABN, addresses and GST status.
- Where changes affect signing blocks, make sure you’re following the legal requirements for signing documents and using the correct entity name.
Plan For Changes In Advance
- Before you change premises, officeholders or trading names, build the update checklist into your transition plan. This reduces the chance of missing a registry or forgetting a dependent system.
- If you’re rebranding or restructuring, it can help to map the sequence: register or update the ABR, adjust business names, then roll changes through your contracts, website and marketing.
Key Takeaways
- “ABR update” means updating your ABN details on the Australian Business Register so agencies, banks and customers see correct information.
- Keep core fields current: addresses, contacts, associates, business activity, GST/PAYG status and any changes to trading names or business names.
- The right people must submit changes - owners, officeholders or authorised contacts - and agents should have a clear Authority to Act before updating client ABN details.
- ABR updates don’t automatically update ASIC or other registers; review your company filings, business name registrations and third-party records separately.
- Maintain a tidy paper trail, use a Privacy Policy to manage data properly, and ensure your invoices, website and contracts reflect any changes.
- If you’re not sure what needs to change, start by checking your ABN and then work through a simple checklist so everything stays aligned.
If you’d like a consultation on ABR updates, authorisations or aligning your records and contracts, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.
