Starting a business, taking on contract work or setting up an investment structure often raises the same practical question: do you need an Australian Business Number, commonly called an ABN?

An ABN can be an important part of operating an enterprise in Australia, but it is not available simply because someone wants to issue invoices or be paid as a contractor. Eligibility depends on the nature of the activities being carried on, the entity involved and whether there is a genuine enterprise rather than employment or a hobby.

What an ABN is, and what it is not

An ABN is a unique identifier used by businesses and other eligible entities when dealing with government agencies, customers, suppliers and other organisations. It helps identify the entity that is carrying on the enterprise.

For many sole traders, an ABN is one of the first registrations completed before they begin trading. It may be used on invoices, applications, business records and registrations for taxes such as GST or PAYG withholding.

However, an ABN is not the same as:

    • a business name
    • a company registration
    • a trade mark
    • a business licence or permit
    • automatic GST registration
    • proof that a person is an independent contractor rather than an employee.

These are separate matters and may each involve different obligations. For example, a person may have an ABN without being registered for GST. Equally, a company needs to be properly registered as a company before it can operate in that structure, even where it will later apply for an ABN.

The key issue is not whether having an ABN would be convenient. The question is whether the applicant is entitled to one.

The central requirement: carrying on, or genuinely starting, an enterprise

The main requirement is that the applicant is carrying on an enterprise in Australia. An entity may also be eligible where it makes supplies connected with Australia’s indirect tax zone in the course of carrying on an enterprise. Companies registered under the Corporations Act can also be entitled to an ABN.

The term “enterprise” is broader than simply running a conventional shop, trade or professional practice. It can include activities undertaken:

    • in the form of a business
    • as a commercial venture or isolated transaction with a trading character
    • on a regular or continuous basis through leasing, licensing or granting interests in property
    • by certain charities, deductible gift fund trustees and superannuation entities
    • by government bodies and some non-profit organisations.

For many small business owners, the most relevant category is an activity carried on in the form of a business. There is no single factor that decides whether an activity is a business. Instead, the overall facts matter.

Features that can support the existence of a business or enterprise include:

    • an intention to earn income or make a profit
    • a genuine commercial purpose
    • regular, repeated or ongoing activities
    • a business-like approach to planning, quoting, invoicing and record keeping
    • relevant skills, experience, tools or systems
    • advertising, marketing or efforts to obtain customers
    • operating in a way that resembles other businesses in the same industry.

A business does not need to be large, employ staff or operate from commercial premises to qualify. Many legitimate sole traders work from home, provide services remotely or begin on a small scale.

What matters is whether the activity has moved beyond an idea, personal pastime or occasional private transaction and is being carried on as an enterprise.

You may apply before trading begins, but you need evidence of real steps

You do not always need to have made your first sale before applying for an ABN. A person can be entitled to register where they are likely to be entitled by the date stated in their application.

This is particularly helpful for people who are preparing to launch a new venture. However, a future business needs to be more than a vague intention to “see how it goes”. The Australian Business Register may ask for evidence that genuine commencement activities have occurred.

Depending on the type of business, useful evidence may include:

    • preparing a business plan or budget
    • purchasing equipment, stock or software
    • arranging insurance
    • obtaining licences, permits or professional registrations
    • entering into a lease or arranging a workspace
    • setting up a business website, social media profile or advertising campaign
    • ordering business cards or stationery
    • seeking finance
    • preparing quotes or tenders
    • negotiating with potential customers or suppliers
    • buying an existing business.

Not every new business will take all of these steps. A freelance consultant, for example, may not need premises or inventory. But they may have prepared service packages, arranged professional indemnity insurance, set up a website and started seeking work.

The activities should match the proposed enterprise. Being able to explain what the business will do, who it will serve and how it expects to earn income is important.

A practical example

Consider someone who has worked as an experienced graphic designer and decides to start offering design services directly to clients.

Before applying for an ABN, they prepare a portfolio, obtain appropriate insurance, purchase design software, establish a professional email address, create a website and send quotes to prospective clients. They intend to charge for projects and keep records of income and expenses.

Those steps are consistent with genuinely commencing a sole trader enterprise.

By contrast, someone who applies for an ABN simply because they may occasionally sell unwanted household items online, without plans for a commercial activity, may not meet the enterprise requirement.

Activities that do not usually support ABN entitlement

Having an ABN can be useful, but it should not be obtained for activities that do not amount to an enterprise. Several common situations cause confusion.

Employment is not the same as contracting

A worker is not entitled to an ABN merely because an employer asks them to get one, pays them against invoices or describes them as a contractor.

The real working arrangement needs to be considered. An ABN does not decide whether someone is an employee or independent contractor.

A person may be more likely to be an employee where the engaging business controls how, when and where work is performed, provides the main equipment, requires the person to perform the work personally, bears the commercial risk and integrates the worker into its business.

On the other hand, a genuine contractor may operate their own business, negotiate their services, work for multiple clients, use their own tools, bear responsibility for business costs and have greater control over how the work is completed.

The answer depends on the full arrangement, including the contract and the practical reality of the relationship. Calling a worker a contractor does not make it so.

This distinction matters beyond ABN entitlement. It can affect income tax withholding, superannuation, workplace rights, insurance and other compliance obligations.

A hobby is not automatically a business

Many people make items, provide services or sell goods recreationally. A hobby can sometimes grow into a business, but there needs to be a genuine commercial transition.

For example, a person who occasionally sells handmade items to friends may be pursuing a hobby. If they begin advertising widely, buying materials for resale, pricing products commercially, keeping business records and consistently seeking customers, the activity may have developed into an enterprise.

The absence of a profit in the early stages does not automatically prevent an enterprise from existing. Start-up businesses may incur losses. However, an individual or partnership generally needs a reasonable expectation of profit or gain from its activities.

Private investments and isolated personal dealings

Some investment activities may amount to an enterprise, while others may not. The position depends on the activity and the entity involved.

For instance, leasing property on a regular or continuous basis can be an enterprise. However, a person who owns a residential investment property will not necessarily need an ABN simply because they receive rent. Their broader tax and GST position should be considered before applying.

Similarly, selling a private car, household furniture or other personal possessions does not generally mean a person is carrying on a business.

Choose the right entity before applying

An ABN belongs to the entity carrying on the enterprise. This makes the choice of structure important.

Common structures include:

    • sole trader
    • partnership
    • company
    • trust
    • incorporated association
    • self-managed super fund
    • charity or other non-profit organisation.

A sole trader is the individual who owns and runs the business. The individual and the business are not separate legal entities, even if the business uses a trading name.

A company is a separate legal entity. It has its own obligations and generally needs its own ABN. Directors should not use their personal sole trader ABN for income that is properly earned by the company.

Trust arrangements require particular care. A trust is not simply a label added to a personal business. The trustee carries on activities in its capacity as trustee, and the ABN registration needs to reflect the correct entity and capacity.

Partnerships also have their own registration considerations. Partners may have separate ABNs for their individual businesses, but that does not replace the need to correctly register a partnership that carries on an enterprise.

Changing from a sole trader to a company, or moving a business into a trust, can therefore have ABN consequences. The structure, contracts, assets, tax registrations and invoicing arrangements may all need attention. It is often worthwhile obtaining advice before making the change rather than trying to correct registrations later.

Information you will generally need for an ABN application

The application process requires the applicant to provide information about the entity and its activities. The exact details depend on the chosen structure.

Before applying, it is sensible to have the following information ready:

    1. Entity details

      This includes the legal name, structure and contact details of the person or organisation applying.

    1. Identity information

      The Registrar needs to be satisfied that the applicant’s identity has been established. Details relating to associates may also be required, depending on the entity type.

    1. Tax file number details

      An application may request the tax file number of the applicant or relevant associates. While a tax file number is not compelled merely because it is requested in the application form, providing the appropriate details can assist with processing and identity verification.

    1. Business commencement date

      The date should reflect when the enterprise has started, or is genuinely expected to start. It should align with the applicant’s actual commencement activities.

    1. Main business activity

      Applicants should be able to clearly describe the main source of income expected from the enterprise. For example, this may be bookkeeping services, construction work, online retail, consulting, transport or property leasing.

    1. Business locations and contact details

      The application may require physical business locations, postal address, email address and phone number.

    1. Associate information

      Companies, trusts, partnerships and other entities may need details of directors, partners, trustees, office holders or other relevant associates.

Applicants should ensure the information is accurate and consistent with other records. The Registrar can request further documents or information before registering an entity.

False or misleading information can have serious consequences. It is better to pause, clarify the structure or seek professional advice than to make assumptions in an application.

An ABN brings ongoing responsibilities

Receiving an ABN is not a one-off administrative step. The entity must continue to be entitled to hold it and keep its Australian Business Register details current.

If information recorded on the register changes, the entity must notify the Registrar within 28 days after becoming aware of the change. This can include changes to contact details, business addresses, business activities or associates.

If the business is sold, closes or stops carrying on an enterprise, the ABN may need to be cancelled. A change in legal structure may also require a new ABN rather than an update to the existing registration.

It is also important to understand that an ABN does not remove ordinary tax obligations. Depending on the circumstances, a business may need to:

    • report business income in an income tax return
    • keep appropriate records
    • register for GST where required or choose to register voluntarily where appropriate
    • lodge BAS statements if registered for relevant tax obligations
    • withhold tax and meet reporting obligations if it employs workers
    • meet superannuation, workplace and state tax obligations where applicable.

The obligations will vary depending on the business structure, industry, turnover, workers and registrations.

Getting the foundations right

The ABN requirement is straightforward in principle: the applicant must be carrying on, or genuinely preparing to carry on, an eligible enterprise. In practice, the difficult areas are often deciding whether an activity is a business rather than a hobby, confirming whether a worker is truly a contractor and choosing the correct entity before registration.

Applying under the right structure and with a clear understanding of the business activity can help avoid issues later with invoicing, tax reporting, GST and business records.

This article is general information only and is not personal financial or tax advice. Your circumstances, structure and proposed activities should be considered carefully. If you are unsure whether you are entitled to an ABN, or which entity should apply, speak with a registered tax agent or accountant, such as, for advice tailored to your situation.