A tradie invoice in New Zealand is the document that connects your quote, site work, and purchase order trail to the dollars a homeowner, head contractor, or facilities manager will pay, while still satisfying Inland Revenue when you are GST registered. You start with a trading name and IRD number that match what the buyer already approved, add a New Zealand Business Number when you have one so enterprise payers can reconcile vendor data, and only show fifteen percent GST lines once registration is effective. Many labour-heavy engagements are paid as schedular payments, so Inland Revenue expects a completed IR330C tax rate notification before payers use your declared rate instead of the forty-five percent non-notified default in most cases. On commercial construction contracts that fall under the Construction Contracts Act 2002, payment claims may need the prescribed notice that Building Performance describes for contracts entered into on or after 1 December 2015. Taxable supply information tiers still control buyer identifiers on higher value supplies. This guide is general information, not personal tax or legal advice.
At February 2024, Stats NZ reported that seventy-three percent of enterprises in New Zealand did not have any paid employees, which shows how many lean trade firms depend on disciplined invoicing to keep cash flow steady (Stats NZ, New Zealand business demography statistics: At February 2024, 2024). Allan Bullot, partner at Deloitte, told RNZ in 2024 that with tools such as Xero and MYOB, doing GST has become much simpler for many firms, which is why compliance debate often focuses on thresholds and behaviour rather than invoice titles alone (RNZ, Small businesses restrict sales to avoid GST, 2024).
What is different about tradie invoices compared with a retail receipt?
Trade billing usually carries quotes, site addresses, progress payments, variations, and sometimes retention, so your invoice must satisfy both commercial matching rules and IRD identity and GST rules. The points below join IRD registration and taxable supply guidance with habits builders expect in accounts payable.
01
Why does a tradie invoice need to match the quote and the purchase order?
Head contractors and councils often three-way match the purchase order, completion evidence, and invoice before they pay. Your line descriptions, quantities, rates, and job or cost code should mirror the approved quote or variation so the payment run does not stall. IRD still cares about identity, dates, and GST fields on the tax invoice or taxable supply record, while your commercial customer cares about the site reference (Inland Revenue, How tax invoices for GST work, last updated 2025).
02
When should you show fifteen percent GST on a progress payment?
If your business is GST registered, each taxable progress payment follows the same GST story as a final invoice, so the document should meet IRD rules for the amount you bill now, including correct wording and the extent to which each supply is taxable when you mix lines (Inland Revenue, How tax invoices for GST work).
03
How do schedular payments change what you send before the first pay run?
IRD explains that contractors who receive schedular payments must give payers a completed IR330C form, otherwise payers must deduct tax at twenty percent for non-resident companies or the forty-five percent non-notified rate in most other cases (Inland Revenue, Deductions from payments to contractors, last updated 16 Apr 2026). Labour-heavy plumbing, electrical, and scaffolding flows into many schedular examples, so treat the form as part of your onboarding pack.
04
What does Building Performance say must travel with certain construction payment claims?
MBIE's Building Performance guidance explains that all payment claims must be accompanied by a prescribed notice, Form 1, information that must accompany all payment claims, for construction contracts entered into on or after 1 December 2015 (Building Performance, Other Construction Contracts Act 2002 requirements). That is separate from your GST story, yet it still affects how commercial construction invoices are read on site.
05
Why does disciplined follow up still matter once the invoice looks perfect?
Katherine Rich, chief executive of BusinessNZ, welcomed updated government procurement rules in 2024 by noting that businesses can look forward to their invoices being paid within ten business days, given explicit requirements now placed on government agencies, which highlights how written payment expectations and clear documents still anchor cash flow even outside construction adjudication (Scoop, Small Business Welcome New Procurement Rules, 11 November 2024).
Sources
What official New Zealand sources stress about trade invoices and cash flow
These points come from Inland Revenue, Stats NZ, and Building Performance. They are the facts behind your template, whether you bill a homeowner or a tier one head contractor.
Inland Revenue states that you must register if you are an entity and either you carry out a taxable activity and your turnover was at least sixty thousand dollars in the last twelve months or you expect it will be at least sixty thousand dollars in the next twelve months, or you carry out a taxable activity and add GST to the prices of goods or services you sell (Inland Revenue, Registering for GST, last updated 13 Feb 2025).
Inland Revenue, Registering for GST (2025). View source
Stats NZ reported that at February 2024 seventy-three percent of enterprises in New Zealand did not have any paid employees, illustrating how many lean trade entities rely on clear payment documentation (Stats NZ, New Zealand business demography statistics: At February 2024, 2024).
Stats NZ, New Zealand business demography statistics: At February 2024 (2024). View source
Workflow
How do you invoice as a tradie from quote to IRD-ready archives?
Lock identity, align commercial artefacts, choose the correct GST treatment, respect schedular and Construction Contracts Act layers where they apply, then store evidence for seven years.
1
Align your IRD number, trading name, licence branding, bank details, and NZBN
Match the name your builder or homeowner already contracted with, confirm the IRD number you will print, and add your New Zealand Business Number when you have one so enterprise accounts payable can reconcile vendor master data (business.govt.nz, New Zealand Business Number).
2
Carry job numbers, site addresses, purchase orders, and variation references into the invoice body
Copy the customer purchase order, cost code, and any written variation into the invoice so finance teams can tie your bill to an approved budget line without a phone chase.
3
Deliver IR330C before the first schedular payment when your engagement qualifies
If the payer treats your fees as schedular payments, hand over the completed IR330C tax rate notification before the first pay run so withholding follows your declared rate instead of the forty-five percent non-notified default in most cases (Inland Revenue, Deductions from payments to contractors).
4
Pick GST wording and line items that match your registration for this period
If you are not GST registered, avoid GST line items that imply you collected GST. Once registered, issue taxable supply information that satisfies IRD tier rules for each supply value and use tax invoice wording that matches IRD guidance for your workflow (Inland Revenue, How tax invoices for GST work; Inland Revenue, How taxable supply information for GST works, last updated 31 Mar 2026).
5
Add Construction Contracts Act wording and Form 1 notices when your contract requires them
For eligible commercial construction contracts entered into on or after 1 December 2015, ensure payment claims carry the prescribed Form 1 notice Building Performance describes, then keep copies with your invoice PDF so disputes reference the same package (Building Performance, Other Construction Contracts Act 2002 requirements).
6
Number the document, split labour and materials when it helps, and show New Zealand dollars clearly
Use a unique invoice number, the issue date, and enough line detail for both the homeowner and a quantity surveyor style review. Follow Invoice Mama's New Zealand tax invoice guide for tiered fields, including buyer identifiers above one thousand dollars and the twenty-eight day response expectation for GST registered buyers on supplies over two hundred dollars (Inland Revenue, How taxable supply information for GST works).
7
Close with due dates, retention references if your contract uses them, and remittance data
State how you want to be paid, the due date, and any reference the payer must use. If your contract includes retention or a payment schedule, mirror the same words your signed agreement uses so disputes go back to the contract, not to a vague description.
8
File GST and income tax obligations, then store PDFs, IR330C copies, and bank confirmations for seven years
Meet GST return deadlines, reconcile schedular statements to your tax return with your accountant, and retain issued and received documents for seven years as IRD describes for income and expense records (Inland Revenue, Records of income and expenses, last updated 1 Apr 2023).
Checklists
Checklists: tradie invoices before you send the PDF
Use this list for a final read. It joins site commercial habits with IRD fields for GST registered work.
Identity and the job trail
The IRD number and trading name on the invoice match the entity named on the quote and contract
Job name, site address, customer purchase order, and variation references appear where your payer expects them
The business bank account and remittance reference match what you already gave the head contractor or owner
Line items and payment story
The invoice number is unique, the date is the issue date, and currency is in New Zealand dollars unless a written contract says otherwise
Labour, materials supplied, equipment hire, and call-out or travel lines each have a clear description and rate
Payment terms, due date, and retention references mirror the signed agreement when you use those mechanisms
If you are GST registered
Taxable supply information satisfies IRD tier rules for each supply amount, including buyer GST numbers and identifiers above one thousand dollars when required (Inland Revenue, How taxable supply information for GST works)
GST return periods label the folder where PDFs, schedular remittances, and bank confirmations live
Credit or debit adjustments reference IRD supply correction guidance when mistakes surface (Inland Revenue, Taxable supply information for GST)
Pitfalls
What trips up tradies on New Zealand invoices?
The expensive patterns are mismatched trading names, missing IR330C leading to high withholding, charging GST before registration, and weak buyer identifiers on large taxable supplies.
You invoice from a different entity than the quote without explaining why
Problem
Builders freeze payments when the IRD number on the invoice does not match the entity that tendered, because compliance teams treat it as a potential subcontractor substitution risk.
Fix
If you genuinely moved the work to another entity, reissue the quote in that entity name before you bill, and ask your adviser if you need a formal novation rather than a quiet swap.
You show fifteen percent GST while Inland Revenue has not confirmed registration
Problem
IRD ties lawful GST collection to registration status and taxable supplies. Charging GST early can create rework with buyers and registration timing questions (Inland Revenue, Registering for GST).
Fix
Issue non-GST invoices until your effective registered date is clear, then reissue corrected taxable supply information if quotes shifted.
You skip IR330C because you think a tax invoice replaces the form
Problem
IRD requires the completed IR330C for payers to use declared schedular rates instead of the forty-five percent non-notified default in most cases (Inland Revenue, Deductions from payments to contractors).
Fix
Send IR330C with your first invoice pack, then resend whenever tailored tax certificates renew.
You omit buyer identifiers on supplies over one thousand dollars to GST registered buyers
Problem
IRD requires buyer name or trade name, GST number, and identifier detail for those supplies, otherwise their GST credit evidence fails (Inland Revenue, How taxable supply information for GST works).
Fix
Validate buyer GST numbers and at least one identifier field before you email large milestone invoices.
Frequently asked questions
Electricians, plumbers, builders, and other trade businesses that bill homeowners, head contractors, and councils across New Zealand.
Do New Zealand tradies have to put an IRD number on every invoice?
In practice almost every paid engagement needs a correct IRD number because schedular payers, companies, and trusts map withholding and GST credits to that identifier. Domestic homeowners may pay from a personal account, yet clear identity still speeds payment. If you are unsure, ask a chartered accountant or tax agent.
How should I show GST on materials I on-sell to the client?
If you are GST registered and the supply is taxable, you show fifteen percent GST on the line in the way IRD describes for tax invoices, either as a separate GST column or, when the GST is exactly three twenty-thirds of the price, with a statement that the total price includes GST, and you show the extent to which each sale is taxable when you mix taxable and non-taxable lines (Inland Revenue, How tax invoices for GST work).
Can I email a PDF tax invoice from the van?
Yes. IRD accepts electronic tax invoices when they contain all required fields and can be produced in a readable form if Inland Revenue or your customer asks for them (Inland Revenue, How tax invoices for GST work).
What gross amount should appear on the invoice when payers withhold schedular tax?
Show the agreed professional fee or contract rate as the gross charged for the service. Withholding sits on the payer side, so your narrative should still let finance teams reconcile gross, withheld tax, and net cash without guessing.
Does a Construction Contracts Act payment claim replace my GST invoice?
No. Payment claims and Form 1 notices deal with construction payment timing and process under the Construction Contracts Act 2002, while GST and taxable supply information follow the Goods and Services Tax Act 1985 rules IRD administers. Keep both threads accurate in the same job file (Building Performance, Other Construction Contracts Act 2002 requirements).
How soon must I give taxable supply information after a GST buyer asks?
IRD explains that for supplies over two hundred dollars you must provide taxable supply information within twenty-eight days of a request unless another date is agreed (Inland Revenue, How taxable supply information for GST works, last updated 31 Mar 2026).
Where should I read IRD field lists beside this tradie overview?
Open Invoice Mama's guides on what to include on a New Zealand tax invoice, taxable supply information, and how to register for GST in New Zealand, then add how to follow up on unpaid invoices in New Zealand when balances age past due.
How does this compare with Australian tradie invoicing?
Australia uses Australian business numbers, ten percent GST, and Australian Taxation Office tax invoice rules, while New Zealand uses IRD numbers, fifteen percent GST, and taxable supply information tiers. If you also work across the Tasman, read Invoice Mama's Australian how to invoice as a tradie guide for side by side habits.
Keep learning
Related guides
Layer IRD registration guidance with field-by-field taxable supply rules, then add collections habits.
Send trade invoices with IRD-ready fields and clear job references
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