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How to get New Zealand business number (NZBN)?

Last update: August 13, 2025

Contents

Getting a New Zealand Business Number (NZBN)? Learn how to apply, key requirements, and how it could potentially help your business.

Key takeaways

An NZBN is a unique identifier for your business in New Zealand
Requirements for an NZBN vary by business type, including IRD numbers and identification for sole traders, partnerships, and trusts
Registered companies in New Zealand automatically receive an NZBN upon completing their Companies Office registration

Getting a New Zealand Business Number (NZBN) might seem confusing at first, but it’s actually a simple process. Whether you’re a sole trader, partnership, trust, or company, having an NZBN can make running your business much easier. This unique number helps manage your business information, deal with government agencies, and interact with other businesses in a hassle-free way.

In this guide, we’ll walk you through everything you need to know about the NZBN—what it is, how to apply, the requirements for different types of businesses, and more.

What is a New Zealand Business Number (NZBN)?

A New Zealand Business Number (NZBN) is a special number that identifies your business in New Zealand. It’s like a unique ID for your business, making it easier to share your details with other businesses and government agencies. Whether you’re a sole trader, a company, or a partnership, you can apply for an NZBN.

If you’re an Australian business selling in New Zealand, you can also get a New Zealand Business Number (NZBN) to make operating in NZ smoother. The NZBN helps with invoicing, building trust with customers, and handling paperwork. It’s recognised across New Zealand, so having this business number makes doing business much easier.

What are the requirements to get an NZBN?

The requirements to get an NZBN depend on your business type. First, you need to identify whether your business is:

Self-employed
Partnership
Trust
Charity or other organisation

Once you have identified your business type, here are the requirements for each:

Sole traders

Eligibility: If you’re self-employed and operating in New Zealand, you’re eligible for an NZBN.

Requirements:
- IRD number: Your personal IRD number is necessary
- Proof of identity: A New Zealand driver’s licence or passport facilitates instant processing. Without these, alternative identification may extend processing to up to three working days

Partnerships

Eligibility: Businesses formed by two or more individuals sharing profits, debts, and responsibilities qualify for an NZBN.

Requirements:
- Partnership IRD number: The partnership’s IRD number is required
- Proof of partnership: Details of all partners, including full names and appointment dates, and possibly a partnership agreement or meeting minutes
- Partner identification: A New Zealand driver’s licence or passport for one partner aids verification

Trusts

Eligibility: Trusts operating in New Zealand can obtain an NZBN.

Requirements:
- IRD number: The trust’s IRD number is needed
- Trustee details: Information about trustees, including names and appointment dates
- Proof of identity: Identification documents for trustees, such as a New Zealand driver’s licence or passport

Companies

Eligibility: Registered companies in New Zealand are automatically assigned an NZBN upon registration with the Companies Office.

Requirements:
- Registration: Ensure your company is registered with the Companies Office
- Company IRD number: While the NZBN is assigned automatically, having your company’s IRD number is essential for tax purposes

How to get an NZBN

Here’s a step-by-step guide to help you through the registration process:

Step 1: Identify your business type

Before starting, confirm whether your business is a sole trader, partnership, trust, or company. The application process and requirements vary based on your business structure.

Step 2: Visit the NZBN website

Go to the official NZBN website. Each business type has a dedicated section to guide you through the registration process.

Step 3: Log in or create an account

To apply for an NZBN, you need to log in using the appropriate account:

Sole traders: Use your RealMe login to access your MyNZBN account
Other business types: Use the company or organisation’s account details as needed

You can create one on the website if you don’t already have a RealMe account.

Step 4: Add the required documents

Upload the required documents through the online portal. Ensure that all details are accurate, as mistakes can delay the process. If you’re providing alternative identification instead of a New Zealand passport or driver’s licence, processing may take longer.

Step 5: Submit the application and wait for Confirmation

If you’ve provided all required information and used RealMe for verification, your NZBN is typically issued immediately
If manual verification is needed (e.g., if alternative identification was submitted), it may take up to three working days to process your application

Step 6: Start Use Your NZBN

Once approved, your NZBN will be emailed to you, and you can find it by logging into your MyNZBN account. You can use the NZBN Lookup tool to verify your business details and share your NZBN with others.

Are there any costs to apply for an NZBN?

No, applying for a New Zealand Business Number (NZBN) is free of charge for all types of businesses, including sole traders, partnerships, trusts, and companies.

What is the difference between an IRD number and an NZBN?

While both an IRD number and a New Zealand Business Number (NZBN) are essential for businesses in New Zealand, they serve very different purposes.

An IRD number is issued by Inland Revenue and is used to manage your business’s tax responsibilities. It’s needed for tasks such as filing income tax, registering for GST, and paying employee taxes. Think of it as a tax-specific identifier for your business or individual account. Every business structure, whether a sole trader, partnership, trust, or company, needs an IRD number to meet its tax obligations.

Key difference: The IRD number is used solely for tax-related purposes, while the NZBN is a broader identifier that streamlines business operations and communication. They complement each other in supporting your business’s tax compliance and daily operations.

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Disclaimer: The information contained is general only and largely our views. Before acting on the information you should consider whether it is appropriate for you, in light of your objectives, financial situation or needs. Although information has been obtained from and is based upon multiple sources the author believes to be reliable, we do not guarantee its accuracy and it may be incomplete or condensed. All opinions, estimates, mentioned products/services and referenced material constitute the author’s own judgement as of the date of the briefing and are subject to change without notice. WorldFirst shall not be responsible for any losses or damages arising from your reliance of such information.

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