NZ Company GST Invoice Requirements: What New Business Owners Must Know
New NZ companies often get GST wrong in their first months. This guide covers registration thresholds, valid tax invoice rules, and when to call an accountant.
When you register a new company in New Zealand, GST compliance is one of the first real administrative hurdles. Get it wrong and you face IRD penalties; get it right and you can claim back thousands in GST on early expenses.
Do You Need to Register for GST?
GST registration is compulsory once your taxable turnover exceeds — or is expected to exceed — NZ$60,000 in any 12-month period. If you are below that threshold you can register voluntarily, which is usually worth it if you have significant business expenses (you can claim back the GST component).
Register online via IRD myIR. You will need your IRD number and your company number from the Companies Register.
What Makes a Valid GST Tax Invoice?
Under the GST Act 1985, a tax invoice (required for any GST claim over $50) must show:
- The words "Tax Invoice" prominently displayed
- Supplier name and GST registration number
- Date of issue
- Description of the goods or services supplied
- Amount charged, clearly showing the GST component (or stating it is GST-inclusive at 15%)
- For invoices over $1,000: the buyer name and address as well
Simplified invoices (under $50 GST-inclusive) do not need all of the above but must still show supplier name, date, description, and price.
GST Filing Periods
IRD will assign you a filing frequency: monthly (turnover over $24M), two-monthly (most new businesses), or six-monthly (turnover under $500k by election). Two-monthly is most common for growing SMEs. Returns are due the 28th of the month following the end of the period.
Common Mistakes New Companies Make
- Forgetting to register — once you hit $60k you are legally required to register from that date, and you are liable for GST on all sales in that period whether invoiced or not.
- Claiming GST on non-business expenses — private use portions must be apportioned out.
- Issuing non-compliant invoices — suppliers can refuse to pay if your invoice is missing required fields.
- Missing the registration date — you must collect GST from the date you were required to register, not from when you actually lodged the form.
How an Accountant Helps With GST
An experienced NZ accountant will handle your GST registration, set up your accounting software (Xero or MYOB) correctly, reconcile your GST returns, and advise on the right filing period. For most new companies, this pays for itself in avoided IRD penalties and legitimate GST claims on setup costs.
If you are looking for an accountant who specialises in new NZ companies, find a local professional through FreshFirms Connect.
For Accountants: Reaching New Companies at the GST Registration Window
The period between company registration and GST registration is a live advisory window. A new director who has just incorporated but not yet registered for GST needs guidance now — before they issue their first invoice incorrectly. FreshFirms alerts accountants to newly-registered NZ companies in their region every day, with director contact details, so they can reach out at exactly this moment. See how FreshFirms works for accountants.