How To Deactivate An ABN: Legal Steps Explained

If you’re scaling down, taking a break from trading or closing your business, deactivating your Australian Business Number (ABN) can be an important part of wrapping things up properly.

In Australia, “cancel ABN”, “deactivate ABN” or “close ABN” all refer to telling the Australian Business Register (ABR) that you’re no longer carrying on a business or enterprise and don’t need an ABN right now. Getting this step right helps you avoid ongoing government notices, clean up your tax registrations and make a fresh start when you’re ready.

In this guide, we’ll walk through what deactivation actually means, when you’re required to cancel, the step-by-step process, and what to do if your ABN was cancelled without you asking for it. We’ll also cover the practical consequences after cancellation so you can move forward with confidence.

If you need a hand at any point, we’re here to help you make clear, compliant decisions so you can focus on your next chapter.

What Does Deactivating An ABN Mean?

When you deactivate or cancel an ABN, the ABR updates your record from “active” to “cancelled”. This signals that you’re no longer carrying on an enterprise that requires an ABN (for example, operating as a sole trader, a company, a partnership or a trust).

Once cancelled, your ABN won’t appear as active on public lookup tools, and you shouldn’t issue invoices quoting that ABN. If you start up again later with the same structure and owners, you may be able to reactivate the ABN; if you’re changing structure or ownership, you’ll usually apply for a new one.

Common reasons to deactivate

• You’ve closed your sole trader business and won’t be invoicing for work.
• A company, partnership or trust has ceased trading and won’t carry on an enterprise.
• You’re taking an extended break from business and don’t want to maintain registrations.
• You’ve moved into paid employment or retired from business.

Not sure whether your activity is still considered “carrying on a business”? It can help to revisit what counts as a business activity in Australia.

Do You Need To Cancel Your ABN?

You must cancel your ABN when you stop carrying on a business or enterprise in Australia. In general, this means you’ve ceased offering goods or services for a commercial purpose and don’t intend to resume in the near term.

Ask yourself:

• Have I stopped trading and do I have no near-term plans to restart?
• Am I no longer issuing invoices or receiving business income?
• Has my entity (company, partnership or trust) stopped operating?
• Am I wrapping up a structure permanently (for example, ending a partnership)?

If the answer is “yes” to one or more of these, it’s time to think about cancelling your ABN.

If you’re on the fence, consider whether simply pausing with an active ABN makes sense for you. Some business owners prefer to keep their number if they’re likely to restart soon, while others choose cancellation to reduce admin and keep records tidy. Reviewing the advantages and disadvantages of having an ABN can help you weigh it up.

Tip: if you just need to confirm your current status, here’s a quick way to check if an ABN is active.

Step-By-Step: How To Deactivate An ABN

The cancellation process is straightforward and can be completed online. The key is to coordinate it with your tax and compliance wrap-up so there are no loose ends.

1) Gather your details

• Your ABN and your identity credentials (for example, myGovID with the right authorisations for the entity).
• Entity details (sole trader, company, partnership or trust) so you can cancel the right registration.
• Any linked registrations you intend to cancel at the same time, such as GST or PAYG withholding.

For companies and trusts, remember the ABN is attached to the entity. Cancelling an ABN is separate from winding up or deregistering with ASIC or finalising a trust. You’ll usually cancel the ABN once the entity has ceased trading; the formal wind-up steps are a related but distinct process.

If you’re unsure how ABNs, ACNs and TFNs fit together for different structures, it’s worth revisiting the basics of trust requirements in Australia.

2) Cancel online (or by phone/form)

Most entities can cancel their ABN through online services using myGovID and Relationship Authorisation Manager. You’ll answer a few questions and submit the request. If online access isn’t an option, you can contact the ABR or use their paper process to request cancellation.

There’s no government fee to cancel your ABN.

3) Choose the effective date and reason

You’ll be asked for the cancellation date (usually the day you ceased carrying on the enterprise) and the reason, such as “ceased trading”, “sold business” or “no longer required”.

In general, you’re expected to update your ABN status within a short period of stopping business, so pick a date that aligns with when you actually ceased trading.

4) Close linked tax registrations

ABN cancellation doesn’t automatically cancel associated tax registrations. If applicable, finalise and cancel:

• Goods and Services Tax (GST)
• Pay As You Go (PAYG) withholding
• Fuel tax credits and other industry-specific registrations

Lodge any outstanding Business Activity Statements (BAS) and income tax returns up to the effective date. If you have employees, finalise Single Touch Payroll (STP) and issue final pay and summaries in line with your obligations.

5) Record-keeping and confirmations

Once your request is processed, your ABN status will show as cancelled on the ABR. Keep any confirmation for your records and update your files, so future you (or your accountant) can quickly see what happened and when.

After Cancellation: What Changes And What Doesn’t?

Cancelling your ABN affects how you bill, how others pay you and how you manage your registrations and relationships. Here’s what to expect.

Issuing invoices and getting paid

You shouldn’t issue invoices that quote a cancelled ABN. If you provide goods or services without quoting an ABN, your payer may be required to withhold tax (currently 47%) from the payment unless an exception applies, and remit that to the ATO. This is a tax administration consequence rather than a criminal offence, but it can impact your cash flow.

If you intend to keep working as an independent supplier, consider whether you’re able to run a business without an ABN in your circumstances, or if reactivating/obtaining an ABN is the better path.

Trading and registrations

• With a cancelled ABN, you generally won’t be able to claim input tax credits or maintain GST registration because you’re not carrying on an enterprise.
• Business bank accounts, merchant facilities and supplier accounts often rely on an active ABN. Notify stakeholders of the change and close or update accounts as needed.
• A business name registration is separate. If you no longer need it, consider whether to let it lapse or cancel it in line with your business name and branding plans.

Company deregistration and trust wind up

For companies, ABN cancellation and ASIC deregistration are different processes. The order can vary depending on your circumstances. Many businesses cancel their ABN once trading stops, then complete formal winding-up steps (including paying debts and distributing assets) before deregistering the company with ASIC. If you’re unsure which step should happen when, get tailored advice to avoid issues with liabilities or records.

Trusts also require careful winding up, including dealing with trust assets and beneficiaries, separate from ABN cancellation.

Can you reactivate later?

Yes, in many cases you can reactivate the same ABN if you resume the same enterprise with the same structure and ownership. If your structure or ownership changes, a new ABN is usually required. If you’re curious about timing and availability, it can help to know that an ABN doesn’t “expire” automatically - see does an ABN expire? for a quick overview.

Common Issues: ABN Cancelled Without Asking, Errors And Fixes

Sometimes an ABN is cancelled by government agencies without a request from the business. This typically happens when records suggest the business is inactive or non-compliant.

Why ABNs are cancelled involuntarily

• No recent signs of activity (for example, no lodgements for an extended period).
• Repeated failure to respond to letters asking you to confirm your activity.
• The underlying entity was deregistered (for example, the company was deregistered with ASIC).
• Data on the ABR is outdated or inconsistent with ATO records.

If your ABN appears cancelled and you’re still trading, first confirm the current status and details with a lookup. This quick guide on checking if an ABN is active is a useful starting point.

What to do next

• Pause issuing invoices with that ABN until the issue is resolved, to avoid payment delays or withholding by customers.
• Update ABR details and ensure all tax lodgements are up to date.
• Contact the relevant agency to explain that you’re still carrying on an enterprise and request reinstatement if appropriate.
• Let key customers and suppliers know you’re resolving an ABN status issue so payments aren’t held up.

Where there’s complexity - for example, a group structure, a recent sale of business, or a deregistered entity - speaking with a legal adviser can help you chart the fastest compliant path back to normal trading.

FAQs: Practical Questions About Cancelling An ABN

Is deactivation permanent?

Not always. If you restart the same enterprise with the same structure and owners, reinstating the ABN is often possible. If you set up a different structure (for example, move from sole trader to company) or change ownership, apply for a new ABN.

Do I have to cancel the ABN before deregistering a company?

No. ABN cancellation and ASIC deregistration are separate processes. The right order depends on your situation, but most businesses cancel the ABN once they’ve ceased trading and then complete the formal steps to wind up and deregister the company. The key is to coordinate both so tax and compliance obligations are closed out properly.

What happens if I keep trading without an active ABN?

Your customers may be required to withhold tax from payments, and you may not be able to rely on business registrations such as GST. It’s better to reactivate or obtain the correct ABN before continuing as an independent supplier, rather than relying on workarounds for trading without an ABN.

Do I have to cancel GST and PAYG as well?

Yes, if you’re no longer carrying on an enterprise, you should cancel linked registrations like GST and PAYG withholding and lodge final returns up to the effective date. ABN cancellation doesn’t automatically close these.

What about business names and branding?

If you don’t intend to use the name, consider cancelling or letting the registration lapse. If you plan to return later or transfer the brand to a new entity, keep the registration current so you retain the name. Your approach may differ depending on whether you operate under a business name or a company name.

Step-Down Checklist: Wrap-Up Tasks Many Businesses Tackle

Tax and reporting

• Lodge final BAS and income tax returns up to the cancellation date.
• Cancel GST, PAYG and other linked registrations you no longer need.
• Finalise payroll and STP if you have employees.

Contracts, accounts and suppliers

• Close or update business bank accounts and merchant services linked to your ABN.
• Notify customers, suppliers and landlords about the change; follow contract termination processes where needed.
• Update insurance policies to reflect your new status (cancel or adjust cover).

Structures and records

• Decide whether to deregister a company or wind up a trust after trading stops (a separate process from ABN cancellation).
• Keep copies of cancellation confirmations and final returns.
• If you’re moving to a new structure for future trading, map out the registrations you’ll need and how that structure fits with your growth plans. Understanding trust requirements or company basics early can save time later.

Thinking ahead

• If you plan to restart soon, consider whether keeping your ABN active is simpler. If you won’t need it for some time, cancellation keeps records clean.
• ABNs don’t “time out” automatically, but government records are periodically reviewed - see does an ABN expire? for how status is managed over time.

Key Takeaways

• Deactivate your ABN when you stop carrying on a business or enterprise in Australia; this is separate from deregistering a company or winding up a trust.
• Cancel online using myGovID and close linked registrations like GST and PAYG, then lodge final BAS and tax returns up to the effective date.
• After cancellation, don’t issue invoices quoting that ABN; payers may need to withhold tax from payments if no ABN is provided.
• ABN cancellation doesn’t automatically end business names, bank accounts or contracts - update or close these as part of your wrap-up.
• If your ABN was cancelled without your request, confirm your status, update records and seek reinstatement if you’re still trading.
• You can often reactivate the same ABN if you resume the same enterprise with the same structure; otherwise, apply for a new one.

If you would like a consultation on deactivating an ABN, coordinating tax and compliance wrap-up, or planning a clean transition to a new structure, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.