Can You Have Two ABNs? What Businesses Need To Know

It’s a common growth question for Australian business owners: your first venture is ticking along, you’re launching a new product line, buying a second business, or starting a side project under the same umbrella - and suddenly you’re wondering whether you can have two ABNs.

It’s a smart question to ask early, because your ABN setup can affect everything from invoicing and GST registration to contracts, liability, and even how customers perceive your business.

In this guide, we’ll walk you through what’s possible (and what isn’t), when you might actually need a second ABN, and what to do instead if your real goal is separating brands, activities, or risk.

What Is An ABN, And Why Does It Matter?

An Australian Business Number (ABN) is an 11-digit identifier issued by the Australian Business Register (ABR). It’s used to identify your business to other businesses, customers, and government agencies.

In practical terms, your ABN tends to sit in the middle of a lot of day-to-day business operations, including:

• issuing invoices and tax invoices
• registering for GST and reporting via BAS (where applicable)
• verifying your business details with suppliers, customers, and platforms
• helping other businesses avoid “no ABN withholding” when paying you
• registering business names (in many cases) and building credibility

Importantly, an ABN is generally tied to the entity that runs the business (for example, you personally as a sole trader, a partnership, or a company) - not just to your business “brand”. If you want a deeper understanding of what getting an ABN means for you, the advantages and disadvantages of having an ABN are worth considering as part of your overall setup.

Can You Have Two ABNs In Australia?

For most small business owners, the short version is:

• One entity generally has one ABN.
• You usually can’t have two ABNs for the same entity at the same time.

So, if you’re a sole trader, you typically have one ABN linked to you as an individual. If you run a company, the company typically has one ABN linked to that company.

That’s why many people asking “can you have 2 ABN numbers?” are actually looking for a different outcome, such as:

• running multiple businesses under different names
• separating different product lines
• keeping accounting clearer
• reducing risk exposure (so one business problem doesn’t affect the other)
• appearing as separate brands to customers

The good news is: you often can achieve those goals - but the right solution is usually about your business structure and registrations (not trying to hold multiple ABNs for the same entity).

So When Do People End Up With More Than One ABN?

Usually, it’s because there is more than one legal entity involved.

For example:

• You operate as a sole trader and also have a separate company for a different venture (each entity can have its own ABN).
• You and a business partner run one business as a partnership (the partnership has an ABN), and you also run your own separate sole trader business (you have your own ABN).
• You set up a second company for a second brand (each company can have its own ABN).

If your question is more along the lines of “can a company have multiple ABNs?”, the usual answer is no - but you may be able to run multiple businesses (or brands) under one company ABN using other registrations (like business names).

Common Scenarios: What To Do Instead Of Getting A Second ABN

Before you decide you “need” another ABN, it helps to clarify the outcome you want. Below are common scenarios we see, and what normally works best.

You Want To Run Two Different Brands

If your goal is branding (for example, one brand for weddings and another brand for corporate events), you may not need another ABN at all.

Often, you can operate multiple brands under the same ABN by registering additional business names. This can let you:

• market each brand separately
• open separate social accounts and websites
• invoice under the relevant trading name (while still using the same ABN behind the scenes)

This is where understanding the difference between your legal entity and your trading name becomes important. A helpful reference point is entity name vs business name, because it explains why you can look “separate” to customers while still being one legal entity.

You Want To Separate Liability Or Risk

If you’re expanding into a higher-risk activity (say, importing products, running events, or taking on larger contracts), you might be thinking about “separating” the new venture so it doesn’t endanger your existing business.

This is a classic situation where a second ABN may be part of the solution - but only because you set up a second entity (for example, a new company). The ABN is the output; the key decision is the structure.

Depending on your goals, a Company Set Up can make sense because a company is generally a separate legal entity from you personally (which can provide a layer of protection, though it won’t remove all risk in every circumstance).

That said, setting up multiple entities also brings extra admin, costs, and ongoing compliance. It’s worth getting advice on whether the benefits outweigh the complexity for your stage of business.

You Want Cleaner Bookkeeping (Without Extra Entities)

Sometimes you don’t want a new legal structure - you just want your accounting to be simpler.

In that case, you might consider:

• separate bank accounts for each trading name (even if they sit under the same ABN)
• separate accounting “tracking categories” or cost centres
• separate invoicing templates for each brand
• clear internal policies on allocating expenses and revenue

This can give you much of the “separation” you want without the overhead of running two entities.

You’re Going Into Business With Someone Else (But Keeping Your Existing Business Too)

Let’s say you already have a sole trader business, and now you’re starting a second venture with a co-founder.

In many cases, this is when you genuinely end up operating with more than one ABN - because the joint venture may operate as a separate entity (like a partnership or company), while you keep your original ABN for your existing business.

If you’re setting up as a partnership, it’s crucial to get the relationship documented properly early on. A Partnership Agreement can help you clarify decision-making, profit sharing, what happens if one partner leaves, and how disputes are handled.

Can I Apply For A Second ABN? (And What Happens If I Try?)

If you’re asking “can I apply for a second ABN?” because you want to keep your businesses separate, the key point is this:

You can apply for an ABN for a different entity - but you generally can’t just apply for a second ABN for the exact same entity.

So what does that mean in practice?

• If you are a sole trader, applying for another ABN as a sole trader (still you) will usually not result in having two concurrent ABNs for the same person/entity.
• If you set up a new company, that new company can apply for its own ABN.
• If you form a partnership (with its own structure details), that partnership can apply for its own ABN.

If you’ve previously had an ABN that was cancelled (or became inactive), and you apply again later, you may be issued a new ABN - but that is different to operating two ABNs at the same time.

What If My Details Have Changed?

If your business has evolved (new address, new activities, new contact details), you may not need a new ABN - you may just need to update your ABN details.

If you’re doing due diligence on your own registrations (or a supplier/client), it can also help to understand how to verify ABN information. Checking whether an ABN is active can avoid issues when entering into contracts or paying invoices.

What Legal And Compliance Issues Should You Think About When Running Multiple Businesses?

Even if you stick to one ABN, running multiple business activities (or multiple brands) can create legal risk if your setup isn’t consistent across your contracts, website, and customer communications.

Here are key areas to keep on your radar.

1. Contracts And Who The “Real” Party Is

One of the biggest issues we see is confusion about who is actually contracting with the customer or supplier.

If you trade under multiple business names, your legal documents should clearly identify the entity behind the brand (for example, “XYZ Pty Ltd trading as Brand A”). This is especially important for:

• customer terms and conditions
• service agreements
• supply agreements
• platform terms (if you run a marketplace or subscription product)

Getting the “contracting entity” wrong can create disputes later about who owes what, who can enforce payment, and who is liable if something goes wrong.

2. Australian Consumer Law (ACL) And Marketing Claims

If you sell to customers (whether online or in-store), Australian Consumer Law (ACL) applies to things like:

• refunds, repairs, and replacements
• what you can and can’t say in advertising
• fair contract terms in standard form contracts

When you’re running multiple brands, it’s even more important that your refund policy, warranty statements, and customer service communications are consistent and accurate across each brand.

3. Privacy And Data Handling Across Brands

If you collect personal information (names, emails, delivery addresses, marketing preferences), you should think carefully about privacy compliance - particularly if customers sign up via different brand websites and you want to use that data across the group.

Some Australian businesses are required to comply with the Privacy Act 1988 (Cth) and the Australian Privacy Principles (APPs), but there are also important thresholds and exceptions (for example, many small businesses are exempt unless certain activities apply). Even where an exemption may apply, having clear privacy practices can still be important for customer trust and platform requirements.

Many businesses choose to have a Privacy Policy that explains what data you collect, why you collect it, who you share it with, and how customers can access or correct their information.

This isn’t just a compliance task - it’s also a trust issue. Customers want to know who they’re dealing with, especially if different brands are actually one entity behind the scenes.

4. Employing Staff Across Multiple Trading Names

If you have staff working across two brands, you’ll want to ensure:

• the correct employer entity is named in the paperwork
• pay rates and award coverage are correct for the actual duties performed
• policies apply consistently (like confidentiality, use of company property, or social media conduct)

It’s common to use one set of employment documentation even if staff work across business units - but the documents still need to be legally correct. For example, an Employment Contract should match the entity employing the worker and the role they are performing.

5. Co-Founders And Ownership (If You Create A New Entity)

If you create a second entity to run a second business - especially with a co-founder or investors - it’s important to document how decisions are made and what happens if someone leaves.

That’s where a Shareholders Agreement can be a key risk-management tool. It helps set expectations around ownership, funding, director appointments, and exits, so you’re not trying to negotiate these things when tensions are already high.

How Do I Choose The Right Setup If I’m Running Multiple Businesses?

There’s no one-size-fits-all answer, but a practical way to decide is to ask:

• Is the main goal branding? If yes, registering another business name under the same ABN might be enough.
• Is the main goal risk separation? If yes, consider whether a separate entity (often a company) is appropriate.
• Do you have different owners? If yes, you may need a separate structure (partnership or company) with clear agreements in place.
• Do you need different tax/GST setups? This can sometimes influence structure decisions (it’s worth speaking with an accountant or checking the ATO guidance for your situation).
• Do you want to sell one business later? If yes, separating the venture into its own entity can make a future sale simpler in some cases.

It can also help to map out your “group” structure early - even if you’re not ready to implement it yet. Many businesses start simple, then restructure as revenue grows and risk increases. That’s normal.

What matters is making sure your registrations and contracts reflect what you’re actually doing, so you’re not accidentally creating compliance issues while trying to scale.

Key Takeaways

• In Australia, one entity generally can’t hold two ABNs at the same time - so you usually can’t have 2 ABN numbers for the same entity concurrently.
• People typically end up with more than one ABN when they operate through more than one legal entity (for example, a sole trader ABN plus a company ABN).
• If your goal is simply to run multiple brands, you may be able to do that under one ABN by registering additional business names.
• If your goal is to separate risk, ownership, or operations, you may need a separate business structure (like a second company), which can then have its own ABN.
• Running multiple businesses or brands raises practical legal issues around contracts, consumer law, privacy, and employment - so it’s worth setting up your documents properly from the start.

Note: This article is general information only and doesn’t constitute tax or accounting advice. If you’re unsure about GST, BAS reporting, or your tax position, it’s a good idea to speak with an accountant or check guidance from the ATO.

If you’d like help deciding whether you need a new entity (and how to set it up properly), you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.