How to Register an NZBN: Companies Office NZ Process

The New Zealand Business Number (NZBN) is the single unique identifier for businesses across NZ government systems. For companies registered under the Companies Act 1993, the NZBN is automatically issued at the moment the Certificate of Incorporation is issued under s.12. There is no separate NZBN application for a company. For sole traders, partnerships, and trusts, NZBN registration is a separate, optional step. This guide walks through both paths.

What Is an NZBN?

The NZBN is a 13-digit identifier administered by the NZBN Registry at the Ministry of Business, Innovation and Employment (MBIE). It is the cross-government key that links a business to:

• Inland Revenue (IRD)
• Companies Office
• ACC (Accident Compensation Corporation)
• Local councils
• Many private-sector services (banks, suppliers)

Reference: https://www.nzbn.govt.nz/

Path A — Company Incorporated Under Companies Act 1993

For a company registered under the Companies Act 1993, the NZBN is automatic. There is no separate application.

Step 1. Reserve the company name (s.22)

1. Sign in at the NZ Companies Register: https://companies-register.companiesoffice.govt.nz/
2. Use RealMe to authenticate or create a Companies Office login.
3. Select Reserve a company name from the dashboard.
4. The system checks the proposed name against the Companies Register and the Trade Marks Register.
5. Pay the prescribed fee (NZ$10 + GST). Reservation is valid for 20 working days (s.23).

Step 2. Apply to incorporate

Once the name is reserved:

1. Confirm the reserved name.
2. Enter the registered office address (must be a physical NZ address — s.186).
3. Enter address for service and address for communication.
4. Add directors with full name, date of birth, place of birth, and residential address.
5. Confirm director qualification under s.151.
6. Confirm at least one director satisfies s.10(d).
7. Add shareholders.
8. Adopt or decline a constitution (s.27).
9. Send director consent and shareholder consent links — every consent must be signed before lodgement.
10. Pay the incorporation fee (NZ$118.74 + GST) and submit.

The Registrar reviews the application — usually electronically within minutes — and issues:

• Certificate of Incorporation under s.12.
• NZBN automatically, linked to the company record.

The NZBN appears on the company’s NZ Companies Register entry and at https://www.nzbn.govt.nz/.

Step 3. View and use the NZBN

Sign in to https://www.nzbn.govt.nz/ to:

• View and print the NZBN certificate;
• Update primary business information (trading name, business activities, contact details);
• Link IRD number, GST registration, and other secondary registers.

The NZBN is publicly searchable at https://www.nzbn.govt.nz/.

Path B — Sole Trader, Partnership, Trust

For non-company entities, NZBN registration is optional but recommended. Many counterparties — banks, government agencies, large suppliers — increasingly require an NZBN for verification.

Step 1. Sign in to the NZBN Registry

Authenticate via RealMe at https://www.nzbn.govt.nz/.

Step 2. Add your business

Select Add a business and choose the entity type:

• Sole trader (a natural person)
• Partnership
• Trust
• Charitable trust
• Other entity type

Step 3. Provide identifying information

For sole trader:

• Full legal name;
• Date of birth;
• IRD number (if held);
• Business name (trading name) if used.

For partnership:

• Partnership name;
• Partners’ names and IRD numbers;
• IRD number for the partnership.

For trust:

• Trust name;
• Trustees’ names;
• IRD number for the trust.

Step 4. Confirm primary business information

• Business activity description (BIC code — Business Industry Classification);
• Physical and postal addresses;
• Website (optional);
• Phone and email contacts.

Step 5. Submit

The NZBN is issued instantly on successful submission. There is no fee for NZBN registration.

Updating NZBN Information

Whether for a Companies Act 1993 company or a non-company entity, the NZBN record must be kept current. Update:

• Primary business information at https://www.nzbn.govt.nz/ — trading name, business activities, contact details.
• Company information for a Companies Act 1993 company — registered office, directors, shareholders — through the NZ Companies Register at https://companies-register.companiesoffice.govt.nz/.

Failure to maintain accurate company information may attract Registrar enquiry under the Companies Act 1993 record-keeping provisions and, for a company, may contribute to Registrar-initiated removal under s.318(1)(b).

Linking Other Government Registrations

The NZBN is the cross-agency key. After NZBN issuance:

• Inland Revenue (IRD) number — apply via myIR at https://www.ird.govt.nz/ (typically same-day for resident-director companies). The IRD number links automatically to the NZBN once both are issued.
• GST registration — required if expected annual turnover ≥ NZ$60,000 (Goods and Services Tax Act 1985, s.51). Apply via myIR. Reference: https://www.ird.govt.nz/gst/registering-for-gst.
• PAYE registration — required if hiring employees. Apply via myIR. Reference: https://www.ird.govt.nz/employing-staff.
• ACC — automatic for businesses with employees; for sole traders, ACC business cover is registered separately.

The NZBN appears alongside each of these registrations and is used by counterparties as the verification reference.

Common Mistakes

NZBN vs Other Identifiers

The NZBN does not replace any of the others — it is the linking key across them.

Realistic Timeline

Conclusion

The NZBN is the New Zealand cross-government business identifier — automatically issued on Companies Act 1993 incorporation and optionally registered for sole traders, partnerships and trusts at https://www.nzbn.govt.nz/. There is no NZBN fee. Once issued, the NZBN is the key that links the business across IRD, Companies Office, ACC, councils, and many private-sector counterparties. Maintaining accurate NZBN information is part of ongoing business compliance, alongside the Companies Office annual return for companies under s.214 and tax filings with Inland Revenue.

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Legal information, not legal advice. MmowW Scrib🐮 is operated by a licensed Gyoseishoshi (行政書士) office in Japan. We are not solicitors, barristers, or lawyers.

Sources

• NZBN Registry: https://www.nzbn.govt.nz/
• NZ Companies Register: https://companies-register.companiesoffice.govt.nz/
• Companies Office hub: https://www.companiesoffice.govt.nz/
• Inland Revenue — IRD numbers: https://www.ird.govt.nz/managing-my-tax/ird-numbers/ird-numbers-for-businesses-and-organisations
• Companies Act 1993 (consolidated): https://www.legislation.govt.nz/act/public/1993/0105/latest/whole.html