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GST invoice rules and IRD compliance
Ensuring your invoices meet IRD standards is the first step to a smooth tax year. Our generator follows the strict requirements of the GST Act 1985.
Contract Labour Invoicing
A plumber completes a job at $80/hr for 10 hours. He uses the generator to list "Labour" at $800. The tool automatically adds $120 GST (15%). He downloads the PDF, sends it to the client, and keeps the itemized record for his 2-monthly filing. Contractors can also read GST for contractors basics.
Mixed Supply Invoices
A web agency invoices for "Website Hosting" ($50/mo) and "Consulting" ($150/hr). By listing these as separate line items, they provide a professional breakdown for their client, ensuring the client's own bookkeeper can easily claim the input tax credit.
Taxable supply information by value
From 1 April 2023 IRD uses taxable supply information (you can still title the PDF “Tax Invoice”). Source: IRD taxable supply information.
| Value of supply (incl. GST) | What you must do |
|---|---|
| $200 or less | You do not have to give the buyer taxable supply information. Seller and GST-registered buyer must still keep records (name, date, description, amount). |
| More than $200 up to $1,000 | Provide taxable supply information: seller name, date, description, total payable, seller GST number, and a clear GST amount or a statement that GST is included. |
| More than $1,000 | All of the above, plus information that identifies the buyer. Show exclusive amount, GST, and inclusive total (or equivalent). |
This generator includes buyer name and address fields so invoices over $1,000 can meet the buyer identification rule.
Why use this generator instead of Excel?
Static Word or Excel invoice files often miss mandatory IRD fields or miscalculate 15% GST. This page is the single invoice tool for GSTCalc.nz:
- Correct maths: Automatic 15% GST on every line.
- IRD fields: Tax Invoice label, GST number, buyer details for higher values.
- PDF export: Download and send without a desktop template file.
For GST add/remove on a figure, use the GST calculator. To register, see how to register for GST. Common invoice mistakes are covered in 10 common GST mistakes in NZ.
No industry template farm. Fill the form above and download the PDF.
Taxable supply checklist
- ✓ The words “Tax Invoice” (or clear GST indication)
- ✓ Seller name and GST number
- ✓ Date of the supply information
- ✓ Description of goods or services
- ✓ Total payable and GST amount (or GST included statement)
- ✓ Buyer identification when the supply is more than $1,000
100% Private and Secure: Your Data Stays Local
Unlike other tools, we do not store your financial data or client details in a database. All calculations and PDF generation happen entirely inside your web browser. This ensures your business information remains 100% private and secure.
Invoicing FAQ
Stay Compliant: 2026 Filing Deadlines
Don't forget to file your GST return and pay any tax due by these dates to avoid IRD interest and penalties. Full dates are on the GST tax due date calendar, and filing steps are in how to file your GST return in myIR.
Record Keeping Reminder
Under the GST Act 1985, you must keep all tax invoices and business records for 7 years. This includes the PDF you just generated.
More NZ GST & Tax Tools
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Tax InvoiceNew Zealand GST tax invoice · GSTCalc.nz |
TAX INVOICE Date: 13 May 2026 |
|
GST Rate 15% |
Invoice # INV-001 |
Reference N/A |
Due Date 27 May 2026 |
|
From (Issuer) Business Name 123 Address St GST: 123-456-789 |
Bill To (Client) Client Name 456 Client Ave |
Invoice Itemisation Log
| Description | Qty | Unit Price | Total (Incl. GST) |
|---|---|---|---|
| Invoice Total | $0.00 | ||
|
Total Excl. GST $0.00 |
Total GST Payable $0.00 |
Total Incl. GST $0.00 |
This report was generated by gstcalc.nz. Free NZ GST invoice tool. Figures checked against IRD GST guidance.
All calculations use the standard 15% GST rate and the official IRD 3/23 fraction method. Amounts rounded to the nearest cent per IRD guidelines.
Disclaimer: This document is provided for informational and record-keeping purposes only. It does not constitute financial or tax advice. Verify figures with a qualified accountant or registered tax agent before filing.
Generated: 13/05/2026