A New Tax System (Australian Business Number) Act 1999

The ABN Act casts a wide net. The term “you” is defined to apply to entities generally unless expressly limited (s 41). “Entity” adopts the GST Act definition (s 184-1 of the A New Tax System (Goods and Services Tax) Act 1999), which includes individuals, bodies corporate, partnerships, trusts, unincorporated associations, and any other entity capable of suing or being sued (s 41). “Enterprise” likewise imports the GST meaning (s 9-20 of the GST Act), encompassing business, trade, profession, vocation, calling and, importantly, activities of religious practitioners when performed in pursuit of their vocation as a member of a religious institution (s 5A and the note to that section).

Corporations Act companies receive an automatic entitlement (s 8(2)). Government entities, non-profit sub-entities and superannuation funds are treated as if they were carrying on an enterprise in Australia (s 5(1)). Groups of individual trustees who are RSE licensees or applicants for an RSE licence are likewise deemed to be entities carrying on an enterprise (s 5(2)). Religious practitioners are relieved of separate registration where their activities fall within the statutory criteria; the religious institution is treated as the relevant entity (s 5A).

The Act binds the Crown in all capacities but does not expose the Crown to prosecution (s 4). It extends to every external Territory (s 7).

Once registered, the obligations in Division 5 fall on the registered entity. Where the entity is a partnership, each partner is liable but any partner may discharge the obligation (s 16(1)). For unincorporated associations or bodies, each member of the committee of management is liable, again with discharge by any member (s 16(2)). For RSE licensees that are groups of individual trustees, each individual is liable (s 16(2A)). Statutory defences protect persons who did not aid, abet or knowingly participate in the contravention (s 16(3)). Government entities headed by a single responsible person have the obligation imposed on that person alone (s 16(4)–(5)).

Access and evidentiary provisions affect any person who seeks a copy of Register information or who relies on the Register in proceedings (ss 26–27). Confidentiality obligations bind “entrusted persons” — anyone who obtains protected information in the course of official employment (s 30(1)), which itself is broadly defined to include Commonwealth, State, Territory and local government employees and delegates (s 41).

Review rights are available to any entity dissatisfied with a reviewable ABN decision (s 21(1)). Offence provisions apply to any person who misuses an ABN or falsely claims representative status (s 23).

In practice the ABN regime therefore touches every Australian business, not-for-profit, government body, superannuation fund, religious institution and their representatives, as well as any third party who deals with the Register or relies on an ABN in commercial or regulatory contexts.

Duties of registered entities

1. Notification of changes — If information previously supplied and recorded in the Register becomes incorrect, the entity must notify the Registrar within 28 days of becoming aware of the change (s 14(1)). The notice must be lodged in the approved form (s 14(2)). Breach constitutes an offence under s 8C of the TAA 1953.

2. Response to requests for information — The Registrar may issue a written notice requiring an entity, its associate or its registered representative to supply information relevant to entitlement, identity or Register details (s 15(1) and the table). The notice must allow at least 14 days (s 15(2)). Information requested in writing must be lodged in the approved form (s 15(3)). Again, breach is an offence under s 8C of the TAA 1953.

3. Joint-and-several liability for partnerships and associations — The obligations in ss 14 and 15 are imposed on each partner or each committee member but may be discharged by any one of them (s 16(1)–(2)). Similar rules apply to groups of individual trustees of RSE licensees (s 16(2A)). A defence is available in prosecution if the person proves they did not aid, abet or knowingly participate in the contravention (s 16(3)).

4. Correct address for service — Notices under the Act may be left at or posted to the address shown in the Register as the address for service (s 12(1)). This does not displace other laws or court orders authorising alternative service (s 12(2)).

Rights of applicants and registered entities

1. Entitlement to registration — Provided the statutory conditions in s 10(1) are met, the Registrar must register the applicant (s 10(1)). The Registrar may request further information or documents to satisfy himself of entitlement or identity (s 10(2)).

2. Back-dating — The date of effect of registration may be any date, including a date before the application was made (s 11(2)).

3. Notice of registration — The Registrar must give written notice of registration, the ABN, the date of effect and all other Register details (s 11(3)).

4. Voluntary cancellation — An entity may apply in the approved form for cancellation of its own registration or that of its representative (s 18(4)).

5. Reinstatement — If the Registrar is satisfied registration should not have been cancelled, he must reinstate it with effect from the cancellation date (s 19).

6. Objection rights — Any dissatisfied entity may object under Part IVC of the TAA 1953 against the seven classes of reviewable ABN decision listed in the table in s 21(2). The Registrar stands in the place of the Commissioner for objection purposes (s 21(3)).

7. Non-disclosure applications — An entity may apply for any detail listed in s 26(3) or prescribed by regulation not to be disclosed. If the Registrar is satisfied disclosure is inappropriate, the detail must be excised from copies and omitted from evidentiary documents (ss 26(4), 27(7)). Refusal of such an application is itself reviewable (item 7 of the s 21(2) table).

Duties and rights of the Registrar

The Registrar (the Commissioner of Taxation — s 28(2)) has the general administration of the Act (s 28(3)). Specific duties include establishing and maintaining the Register (s 24), registering compliant applicants (s 10), issuing notices, cancelling or reinstating registration where statutory criteria are met, preparing an annual report (s 29), and adjusting incorrect details when correct information is available (s 29A). The Registrar may also change an ABN at any time (s 17) and must excise protected information before releasing copies (s 26(2)).

The Registrar enjoys broad information-gathering powers (s 15) and is protected by strict confidentiality rules (s 30). Delegation is possible under s 8 of the TAA 1953 (note to s 28(2)).

The ABN Act itself contains only three offence provisions, all carrying a maximum penalty of two years’ imprisonment:

• Purporting to identify oneself with a non-ABN number or another entity’s ABN (s 23(1)).
• Purporting to identify an associate with a non-ABN number or the associate’s ABN when it is not theirs (s 23(2)).
• Purporting to be a registered representative of an entity when not so registered (s 23(3)).

The bulk of day-to-day enforcement occurs through the taxation offence regime. Both the change-notification obligation (s 14) and the obligation to respond to information requests (s 15) are “taxation laws” for the purposes of the TAA 1953. Failure to comply therefore triggers the strict-liability offence in s 8C of the TAA 1953, which carries substantial administrative penalties and, in serious cases, prosecution.

Joint-and-several liability for partnerships, unincorporated bodies and trustee groups (s 16) extends the reach of these offences. The statutory defence in s 16(3) protects passive partners or committee members who can prove they did not aid, abet or knowingly participate in the contravention.

Cancellation of registration (s 18) is an administrative rather than punitive measure, but it has serious commercial consequences: loss of the ABN immediately ends the entity’s ability to quote it for GST, withholding tax and other purposes. Decisions to cancel or to refuse voluntary cancellation are reviewable (s 21(2)), providing a safeguard against erroneous or oppressive action.

Confidentiality breaches by entrusted persons attract their own two-year imprisonment penalty (s 30(2)). The exceptions in s 30(3) are narrowly drawn and do not permit disclosure to Ministers or elected members (s 30(4)). Courts cannot compel production of protected documents or information except where necessary to give effect to a taxation law (s 30(5)).

The Register’s evidentiary status (s 27) indirectly supports enforcement: a certified extract is prima facie evidence, easing proof of registration status or cancellation in prosecution or civil recovery proceedings.

No civil penalty regime sits alongside the criminal offences; enforcement therefore relies on administrative sanctions (cancellation, penalty notices under the TAA 1953) and, where appropriate, criminal prosecution.

The ABN Act is deliberately interwoven with the GST, income tax and business names regimes.

• GST Act — Entitlement to an ABN largely tracks GST enterprise and supply concepts (ss 8(1)(b), 41 definitions of “enterprise”, “supply”, “connected with the indirect tax zone”, “indirect tax zone”). Limited registration entities under the GST Act are barred from obtaining an ABN (s 8(3)). GST registration and cancellation dates must be entered in the Register and are publicly available (s 26(3)(e)–(f)). Non-profit sub-entities are deemed to be carrying on an enterprise (s 5(1)).

• Income Tax Assessment Acts — The objects clause expressly includes reliable identification for taxation laws (s 3(2)). The Register must record deductible-gift-recipient status (note to s 25 referring to s 30-229 of the ITAA 1997) and endorsement details under the TAA 1953 (note referring to s 426-65). “Associate” adopts the broad ITAA 1936 s 318 definition (s 41). “Approved form” takes its meaning from the ITAA 1997 (s 41).

• Taxation Administration Act 1953 — The ABN Act is a taxation law (note to s 14(1)). Obligations under ss 14 and 15 are therefore enforceable under TAA 1953 s 8C. Review of reviewable ABN decisions occurs under Part IVC of the TAA 1953, with the Registrar substituted for the Commissioner (s 21(3)). Confidentiality and court-non-compulsion rules mirror those in other taxation laws (s 30). The Commissioner’s dual role as Registrar is confirmed (s 28(2)), and delegation is authorised by TAA 1953 s 8 (note to s 28(2)).

• Business Names Registration Act 2011 — Business names registered to an entity on the Business Names Register must be entered in the ABN Register and are publicly available (s 26(3)(d)).

• Corporations Act 2001 — Corporations Act companies receive an automatic ABN entitlement (s 8(2)). ACN and ARBN must be recorded and disclosed (s 26(3)(h)).

• Superannuation Industry (Supervision) Act 1993 — RSE licensees and registrable superannuation entities receive tailored Register entries (s 26(3)(ja)–(jb)) and are deemed to be carrying on an enterprise (s 5).

• Evidence Act 1995 — The Register’s admissibility rules operate without limiting the Evidence Act 1995 (s 27(6)).

• Public Governance, Performance and Accountability Act 2013 and Public Service Act 1999 — These statutes supply definitions for “Agency Head”, “non-corporate Commonwealth entity” and “official employment” used in the confidentiality exceptions (s 30(3)).

The net effect is that the ABN Register functions as a hub through which information collected for one statutory purpose (ABN registration) can lawfully be used or disclosed for a wide range of Commonwealth, State and Territory regulatory purposes, subject only to the privacy and non-disclosure safeguards in ss 26, 27 and 30.

Although the core of the ABN Act remains the 1999 text, several important amendments illustrate its evolution from a tax-system simplification measure to a broader digital-government platform.

• Introduction of representatives (ss 9A, 10A, 11A, 18(1A), 25(3)–(4)): Added to facilitate electronic dealings with government entities. The Registrar now records nominated individuals’ names, email addresses and authorisation scope. This change responded to the growth of online portals requiring verified signatories separate from the legal entity.

• Religious practitioners (s 5A): Inserted to prevent individual ministers, priests or members of religious orders from needing separate ABNs for vocational activities. The religious institution is treated as the enterprise. This clarified compliance for charities and faith-based organisations.

• Superannuation and RSE licensee details (s 26(3)(ja)–(jb)): Expanded public data fields to include APRA-recorded addresses, classes of RSE licence, contact persons and RSE licensee identity. These amendments support the integrated prudential and tax supervision of the superannuation industry.

• Adjustments to details (s 29A): Permits the Registrar to correct Register entries when satisfied that held information is incorrect and better information is available. This provides an administrative correction power without the need for formal cancellation and re-registration.

• Updated confidentiality exceptions (s 30(3)): References to the Administrative Review Tribunal (formerly AAT), the Public Governance, Performance and Accountability Act 2013 and modernised agency terminology reflect machinery-of-government and tribunal reforms.

• Business Names Register cross-reference (s 26(3)(d)): Updated from the pre-2012 State-based business names system to the national Business Names Register maintained under the Business Names Registration Act 2011.

These changes were driven by three policy imperatives: (1) reducing regulatory burden through greater use of digital identities; (2) ensuring the ABN regime kept pace with prudential and not-for-profit regulation; and (3) modernising administrative and privacy safeguards. The result is an Act that, while still anchored in its 1999 objects, now underpins a far broader ecosystem of government service delivery.

Because most ABN decisions are reviewable under Part IVC of the TAA 1953, disputes ordinarily surface in the Administrative Review Tribunal or Federal Court rather than as standalone ABN Act litigation. Key themes include:

• Entitlement disputes — Courts have emphasised that “carrying on an enterprise” requires a genuine business or commercial activity, not merely isolated or hobby transactions. Decisions refusing ABNs to entities that fail the s 8 test are routinely upheld where the applicant cannot demonstrate ongoing enterprise activity.

• Identity and fraud cancellations — Cancellation under s 18(1)(a) for registration under a false identity has been contested where the applicant argues that an error in the application was inadvertent. The Registrar’s satisfaction is reviewed on ordinary administrative-law grounds; courts will intervene only if the decision is legally unreasonable or procedurally unfair.

• Date-of-effect challenges — Because the Registrar may set any date (including a pre-application date), disputes arise when an entity seeks an earlier effective date for input-tax-credit or deduction purposes. The reviewable nature of the decision (item 1 of the s 21(2) table) allows merits review, but the Tribunal has generally deferred to the Registrar’s discretion where it is rationally connected to the evidence.

• Non-disclosure applications — Refusals under ss 26(4) and 27(7) have generated controversy where entities argue that disclosure of principal-place-of-business details exposes them to harassment. The Registrar’s satisfaction that disclosure is “appropriate” is given weight, but the Tribunal will examine whether privacy or safety risks were properly weighed.

• Confidentiality prosecutions — Although rare, breaches of s 30 have been prosecuted where officers disclosed protected information to unauthorised persons. Courts have stressed that the exceptions in s 30(3) are exhaustive; disclosure to a Minister outside those exceptions remains criminal even if motivated by public-interest considerations.

No High Court decision has yet settled a pure ABN Act question, but the legislation’s interaction with the GST Act has been considered in several GST cases where ABN status was a threshold issue. The Federal Court has consistently treated the Register as prima facie evidence, placing an evidential burden on any party asserting that an entity is not registered or has had its registration cancelled.

Controversies have also arisen administratively. Small businesses and sole traders have complained that the 28-day notification obligation (s 14) is burdensome when address or contact details change frequently. Privacy advocates have criticised the breadth of permissible disclosures under s 30(3), particularly to State and Territory bodies. Successive annual reports by the Registrar have acknowledged these concerns and noted incremental improvements in online update tools and privacy impact assessments.

Most practitioners are aware of the core registration and cancellation rules, but several subtleties repeatedly catch even experienced advisers:

1. Back-dating is not automatic — While s 11(2) permits any date of effect, the Registrar’s decision setting that date is itself reviewable. Entities that assume an ABN will be back-dated to the commencement of business activity frequently discover that the Registrar has chosen the application date or a later date. Evidence of when the enterprise actually commenced must be placed before the Registrar at the time of application.

2. TFN is never compulsory on application — Section 9(3) and 9A(3) expressly state that the approved form may request but not compel a TFN. Inclusion is protected from the general prohibition on unauthorised TFN requests (Taxation Administration Act 1953 s 8WB(1A)(a)). Many applicants nevertheless feel pressured to supply it; refusal cannot lawfully result in registration being denied on that ground alone.

3. Associates on the Register — If the approved form requests associate details, the Registrar must be satisfied as to the associate’s identity (s 10(1)(ca)). Failure to establish associate identity can block registration even if the primary entity’s identity is clear. This is particularly relevant for trusts and partnerships.

4. Religious practitioner deeming is one-way — Section 5A deems the religious institution to have done the activity; it does not prevent the institution from also registering in its own right. Dual registration can create compliance confusion when the institution and the practitioner both quote ABNs for the same supplies.

5. Cancellation can be retrospective — The date of effect of cancellation may pre-date the notice (s 18(3)(c) and s 18(6)(c)). An entity that continues to quote a cancelled ABN during the period between the deemed cancellation date and actual notice may inadvertently commit identification offences under s 23.

6. The Register is only prima facie evidence — Section 27(1) does not make the Register conclusive. A party can lead evidence that an entry is wrong, but the evidential burden is heavy. In practice, courts treat the Register as highly persuasive.

7. Representatives are not delegates — A registered representative under s 9A is recorded for electronic-dealing purposes only. The representative does not automatically acquire authority to bind the entity under general agency law; separate corporate authority or power of attorney may still be required.

8. Protected information survives cancellation — Confidentiality obligations under s 30 continue after an entity’s registration is cancelled. Former registrants cannot demand that all their data be deleted from the Register; only non-disclosure applications under s 26(4) or s 27(7) can limit future release.

9. State and Territory bodies can receive information — The exceptions in s 30(3)(c)(vi)–(vii) and (d) permit disclosure to State and Territory departments and public-purpose bodies. Practitioners should assume that ABN data provided to the Commonwealth may lawfully flow to State regulators unless a successful non-disclosure application has been made.

10. Annual report is more than formal — Section 29 requires a report on the “working” of the Act. The reports have repeatedly flagged compliance rates, cancellation volumes and privacy complaints. They are a useful source of de facto administrative policy that is not always reflected in the formal guidance on the ABR website.

Pre-registration

• Confirm the entity meets the s 8 entitlement test. Maintain contemporaneous records showing the commencement of an enterprise (invoices, contracts, advertising, bank statements).

• For religious practitioners, document that activities are in pursuit of vocation as a member of a religious institution and are not performed as employee or agent.

• Prepare associate information if the online form requests it; identity documents will be required.

Application

• Use the official ABR online portal or the approved paper form. Voluntary inclusion of TFN is permitted and simplifies future tax interactions.

• If applying for a representative, nominate an individual with an email address that will be used for all future electronic correspondence. Decide whether the representative may nominate further representatives.

Post-registration

• Treat the registered address for service as the single official address (s 12). Update it immediately upon change.

• Implement internal procedures to ensure that any change to name, address, associates or other Register data triggers a s 14 notification within 28 days of awareness.

• Respond to any s 15 notice within the specified time (never less than 14 days). If the request is for information in writing, lodge via the approved form.

• For partnerships, unincorporated bodies and trustee groups, designate a single person to handle ABN compliance so that the joint-and-several obligation is discharged efficiently.

Ongoing management

• Monitor the public version of the Register (abr.business.gov.au) to ensure only permitted details are displayed. If sensitive information appears, lodge a non-disclosure application under s 26(4) immediately.

• Quote the ABN on all tax invoices, BAS, and Commonwealth tender documents. Never quote a cancelled ABN or another entity’s ABN.

• If cancellation is proposed by the Registrar, respond promptly with evidence of ongoing entitlement. If cancellation occurs, apply for reinstatement under s 19 if the decision was erroneous, or lodge a fresh application once entitlement is restored.

• For entities with representatives, maintain accurate records of who is authorised to act electronically. Cancel representative registration promptly when the individual ceases to represent the entity (s 18(1A)(b)).

Record-keeping and audit readiness

• Retain evidence of all s 14 notifications, s 15 responses, and non-disclosure applications for at least five years.

• Ensure internal delegations and authority documents align with the representative details recorded on the Register.

• Conduct periodic self-audits of the Register entry against current business details, especially after corporate restructures, changes of trustee or changes of principal place of business.

By treating the ABN Register as a living compliance document rather than a “set-and-forget” identifier, entities avoid the most common pitfalls: late notification, use of outdated details, and failure to respond to Registrar requests. The regime is fundamentally administrative; timely, accurate engagement with the Registrar almost always resolves issues before they escalate to cancellation or penalty.