Transferring an ABN in Australia: Rules and Limits

Can You Transfer An ABN In Australia?

In most cases, you can’t transfer an ABN from one person or entity to another.

Your ABN is issued to a specific legal entity. That entity might be:

• a sole trader (an individual)
• a partnership
• a company
• a trust
• an incorporated association or other entity type

Because an ABN identifies the entity (not just the “business idea” or the brand), it generally stays with that entity for its life. If the entity changes, you usually need a new ABN.

This is where a lot of confusion comes from: people often say they are “selling the business”, but legally they might be selling:

• the shares in a company (the entity stays the same), or
• the business assets and goodwill (the entity changes), or
• the business operations moving into a new structure (restructure), or
• just the brand name and customer list (IP/goodwill sale)

Whether the ABN can stay in place depends on whether the underlying entity stays the same.

When The ABN Usually Stays The Same

The ABN usually stays the same if:

• you have a company and you sell the shares in that company to a new owner, and
• the company itself continues to exist and operate (same ACN, same entity)

In that situation, the ABN is still “owned” by the same company. The owner of the shares changes, but the company is the same legal person.

Share sales are common for established businesses, especially where licences, contracts, staff, or supplier arrangements are easier to keep in place inside the same entity.

When You Usually Need A New ABN

You usually need a new ABN where the entity changes, for example:

• a sole trader sells the business to another person
• a partnership changes partners (this can trigger a new partnership ABN, depending on the circumstances)
• a sole trader “becomes” a company (you incorporate)
• a business moves from one company to another (asset transfer between entities)
• you change to (or from) a trust structure

Even if the trading name, website, branding, and staff stay the same, the ABN generally won’t “follow” if the underlying entity is new.

Why ABNs Generally Aren’t Transferable (And Why That’s A Good Thing)

It can feel frustrating that you can’t just transfer an ABN, but there’s a good legal and commercial reason for it: an ABN is part of how the government and the market track responsibility.

An ABN links to things like:

• GST registration and reporting history
• PAYG withholding obligations (if the entity has employees)
• tax and compliance history attached to that entity
• business name registrations linked to that ABN
• public record lookups (customers and suppliers can verify who they’re dealing with)

If ABNs were freely transferable, it would be much harder to identify who is responsible for debts, tax obligations, and legal liability tied to past trading.

For a buyer, this is actually protective: it helps reduce the risk of “inheriting” the seller’s history unless you’ve intentionally purchased the same entity (for example, via a share sale).

Note: This article is general information only and isn’t tax or accounting advice. ABN/GST/PAYG outcomes can be fact-specific - consider speaking with your accountant and/or checking the ATO guidance for your situation.

Buying A Business: What Happens To The ABN?

If you’re buying a business, the first question is: are you buying the entity or just the business assets?

Option 1: Asset Sale (Most Common For Small Businesses)

In an asset sale, you (as the buyer) purchase selected assets of the business. This can include:

• equipment and stock
• intellectual property (brand, domain name, logo, content)
• customer lists and goodwill
• contracts (sometimes, if they can be assigned)

The seller keeps their entity and their ABN. You operate the business through your own entity (existing or newly set up), meaning you’ll use your ABN (or apply for a new one).

In this scenario, you generally won’t take over the seller’s ABN - you’ll operate under your own.

Option 2: Share Sale (Buying The Company That Has The ABN)

In a share sale, you buy the shares in the company that runs the business. The company continues trading and keeps the same ABN.

This can be neat operationally, but it needs careful legal and financial due diligence, because you may also be taking on risks and liabilities inside that company.

If you’re weighing up an asset sale vs share sale, it’s worth getting the transaction documented correctly with an Asset Sale Agreement (for asset deals) or share sale documentation (for share deals), so it’s clear what is and isn’t being transferred.

A Quick Practical Tip: Match The Deal Structure To Your Goal

If your goal is to “take over everything as-is” (including contracts, accounts, history), you might be thinking share sale.

If your goal is to “buy the brand and operations, but start fresh legally”, an asset sale is often the cleaner path.

There’s no one-size-fits-all answer. The right structure depends on what you’re buying, your risk appetite, and how the business is set up today.

Common Scenarios: When You Might Think You’re “Transferring” An ABN (But You’re Not)

Let’s walk through a few situations we commonly see in small businesses and startups.

1. You’re Changing From Sole Trader To Company

Many founders start as a sole trader for simplicity, then incorporate once the business grows (or once they bring on a co-founder or investor).

When you move from sole trader to company, you’re creating a new legal entity. That means:

• your sole trader ABN generally does not carry over to the company
• the company will need its own ABN (and an ACN)
• your contracts, invoices, and customer terms should reflect the new entity

If you’re setting up a company properly, it’s also a good time to put a Company Constitution in place (or adopt the replaceable rules, depending on your needs) and make sure ownership and decision-making are clear.

2. You’re Bringing On A Co-Founder (Or Splitting Ways)

It’s common for a startup to begin under one person’s ABN, and later involve a co-founder. The tricky part is that the ABN remains tied to the original entity.

If you and a co-founder want to operate jointly, you might set up:

• a partnership (new ABN for the partnership), or
• a company with both of you as shareholders (new ABN for the company)

Where there are multiple owners, clear documentation early can prevent disputes later. A Shareholders Agreement can set out how decisions are made, what happens if someone leaves, and how equity is handled.

3. Your Partnership Changes

Partnerships are a common structure for family businesses and professional services, but they can be fragile when the partner mix changes.

If one partner exits or a new partner joins, the partnership may be treated as a new partnership for ABN purposes in some cases (even if the trading name looks identical from the outside). That can mean a new ABN is required.

This is also a good moment to review or put in place a Partnership Agreement, because partnership changes tend to be when misunderstandings surface.

4. You’re Selling “The Business Name” To Someone

A business name registration is not the same thing as an ABN, and selling a business name doesn’t mean transferring the ABN.

Business names are registered to an ABN holder, but the ABN itself stays with the entity. If you sell a business name, you’re typically arranging for the buyer to register that business name to their ABN (or to their company’s ABN) after the transfer process.

It’s also worth remembering that a business name is not the same as trade mark protection. If the brand is valuable, it may be worth considering trade mark protection separately.

What You Need To Update When The ABN Changes (So You Don’t Get Caught Out)

If you’ve worked out that you can’t transfer the ABN (and you need a new one), the next step is making sure your business operations reflect that change.

ABN changes can create admin headaches if they’re handled late. The good news is that with a checklist approach, it’s very manageable.

Key Places ABN Changes Need To Be Reflected

• Invoices and quotes: make sure the entity name and ABN displayed are correct (and match the contracting party).
• Customer contracts / terms: the legal entity providing the goods/services should match the ABN shown on invoices.
• Supplier agreements: suppliers may need a new credit application and updated terms under the new entity.
• Employment arrangements: if the employing entity changes, employment documentation may need updating and the transition must be handled carefully.
• Website footer and policies: ABN and entity details often appear in website terms, checkout pages and privacy disclosures.
• Payment providers and marketplaces: most platforms require verification and may freeze payments if business details don’t match.
• Insurance: policies need to be in the correct legal name, especially public liability and professional indemnity.
• Banking and finance: business bank accounts, merchant facilities, loans and security documents must match the correct entity.

This is also a good time to ensure your customer-facing terms are fit for purpose. Many businesses use online terms to set expectations, limit disputes, and explain payment/refund processes. Depending on your business model, you might need Business Terms that align with how you actually deliver your product or service.

Be Careful With “Old ABN” Invoices

A common mistake is continuing to invoice under the seller’s ABN (or your old ABN) “just for a little while” while you sort things out.

This can create real issues, including:

• incorrect contracting party (which can make it harder to enforce payment terms)
• GST reporting mismatches
• customer confusion about who they’re legally dealing with

Even if it seems like a minor admin detail, your ABN ties directly to legal responsibility, so it’s worth getting right early.

What Legal Documents Should You Review When A Business Changes Hands Or Structure?

ABN questions usually come up during a bigger transition: sale, restructure, new co-founder, or a growth stage where you’re formalising your startup.

Here are some of the most common legal documents to consider reviewing or putting in place.

• Sale documentation: if you’re buying or selling, your contract should clearly set out what is being sold (assets vs shares), what’s included, and what happens after completion.
• Customer terms or service agreement: clarify who the supplier is (the correct entity), payment terms, delivery, limitations, and dispute handling.
• Privacy Policy: if you collect personal information (even just online enquiries), you’ll often need a Privacy Policy that reflects the right entity and your actual data practices.
• Employment contracts: if you have staff, a correctly drafted Employment Contract helps set expectations and reduce disputes, especially during transitions.
• Founders / ownership documents: if more than one person owns the business, document the commercial deal and decision-making rules (often via shareholders or partnership arrangements).
• IP ownership and assignments: if the brand, software, designs, or content are valuable, make sure they’re actually owned by (or licensed to) the right entity after the restructure or sale.

These documents are where a lot of “hidden” risk sits. If the paperwork doesn’t match how the business is operating, it’s easy to end up with disputes about who owes what, who owns what, and who is responsible when something goes wrong.

If you’re planning a restructure or sale, it can also help to think about asset security and financing arrangements, especially if equipment or inventory is financed. Depending on how the business is funded, a lender may register a security interest. Understanding that ecosystem (and checking it properly) can be important during a business purchase.

Key Takeaways

• In most cases, you can’t transfer an ABN because it belongs to a specific legal entity, not the “business” concept or brand.
• If you buy the shares in a company, the ABN usually stays the same because the company is the same entity (only the ownership changes).
• If you buy the business assets (an asset sale), you usually need to use your own ABN (or register a new one), because the seller keeps their ABN.
• Common changes like moving from sole trader to company, partnership changes, or bringing on a co-founder can mean a new ABN is required.
• When an ABN changes, update invoices, contracts, supplier accounts, website policies, and employment arrangements so your paperwork matches your legal reality.
• Transitions are a great time to review key documents like sale agreements, customer terms, privacy policies, and founder/ownership documents to reduce risk.

If you’d like help with a business purchase, restructure, or getting your startup set up under the right entity, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.