Getting a IRD number in New Zealand on myIR: who needs one, how to register, what the number looks like, how to find or check one, and where it goes on your invoices.
The IRD number is the number Inland Revenue (IRD) assigns to a taxpayer in New Zealand. It follows you across every tax you deal with: GST, income tax and withholding. Businesses that pay you will ask for it before they release payment, because they report their suppliers to Inland Revenue (IRD) by this number.
Who needs one
Everyone has an IRD number; companies and partnerships get their own; GST registration follows once turnover hits the threshold.
How to register, step by step
Apply for an IRD number online at ird.govt.nz with your passport or NZ ID and proof of address.
Companies: apply for the IRD number as part of Companies Office registration.
Register for GST in myIR once turnover exceeds $60,000 in 12 months.
Written from published tax-authority guidance and reviewed on 2026-10-11. Everything here is indicative rather than a ruling on your circumstances, and rules change. Confirm anything you rely on with Inland Revenue (IRD) before acting on it, and tell us if you find something out of date so we can correct it.
This guide explains the rules in general terms and is not tax advice for your circumstances. Confirm your position with a qualified adviser or with Inland Revenue (IRD).