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How to Invoice Clients in New Zealand: The Complete 2026 Guide

March 26, 202622 min read

To invoice clients in New Zealand, include your business name, GST number (if registered), the client's details, an invoice date and number, a clear description of goods or services, the amount, and how GST applies. GST-registered businesses must show GST separately and supply taxable supply information that meets Inland Revenue rules.

If you run a business, freelance, or contract in Aotearoa, knowing how to invoice clients in New Zealand correctly is one of the most practical skills you can master. A compliant invoice gets you paid faster, keeps Inland Revenue happy, and protects you if a payment is ever disputed. Yet the rules around Goods and Services Tax (GST), taxable supply information, and record-keeping trip up a lot of new sole traders and small business owners.

This guide breaks down exactly what a New Zealand invoice needs, how GST shows up on it, when you have to register, and how to handle overseas clients. It is written for freelancers, consultants, agencies, contractors, creators and small businesses operating in or billing into New Zealand. This is educational information, not tax or legal advice - always confirm current rates, thresholds and rules directly with Inland Revenue (IRD) or a qualified accountant.

Invoicing in New Zealand: The Basics

New Zealand's invoicing system is refreshingly straightforward. There is no federal-versus-state patchwork, just one broad consumption tax - GST - applied at a single national rate to most goods and services.

The central authority is the Inland Revenue Department (IRD). IRD administers income tax, GST and the rules around what your invoices and records must contain. If you are GST-registered, the document you issue is what New Zealand law now calls taxable supply information, though most people still call it a "tax invoice" in day-to-day conversation.

A key thing to understand early: your invoicing obligations change depending on whether you are registered for GST. If you are not registered, you issue a clear commercial invoice and charge no GST. If you are registered, you charge GST on most sales and provide information meeting IRD's standards so customers can claim it back where eligible.

Throughout this guide, "invoice" refers to the bill you send a client. Where the rules specifically concern GST documentation, we will say so.

New Zealand's system rhymes with its neighbours - Australia runs GST through the ATO, the UK runs VAT through HMRC - but rates, thresholds and exact wording differ, so never assume an Australian or British template is automatically NZ-compliant.

What a Compliant New Zealand Invoice Must Include

Even if you are not GST-registered, a professional invoice should always carry enough information to identify the parties, the work, and the amount owed. Once you are registered, IRD's taxable supply information rules add specific requirements that scale with the value of the sale.

Core details every invoice should have

Your business name and contact details - trading name, email, phone and ideally your physical or postal address.
Your GST number - required if you are GST-registered; omit it entirely if you are not (never display a fake or "pending" number).
The word "Invoice" clearly shown, so it is not mistaken for a quote or statement.
A unique invoice number for your own records and reconciliation.
The invoice date and, separately, the due date or payment terms.
Your client's name and, for higher-value GST supplies, their details too.
A clear description of the goods or services supplied, with quantities and unit prices where relevant.
The total amount payable, and how GST has been treated (more on this below).
Payment instructions - bank account number, or a payment link if you accept cards.

What GST registration adds

When you are GST-registered, the document must let your buyer support a GST claim. New Zealand modernised these rules so the level of detail depends on the value of the supply - small sales need less, larger sales need more, including the buyer's identifying information for higher-value transactions. Because the specific dollar tiers can change, confirm the current thresholds on the IRD website rather than relying on a figure you read once.

If you want a deeper grounding in the universal anatomy of an invoice before layering on the NZ specifics, our guide on how to write a professional invoice walks through every element line by line.

GST and How It Appears on Your Invoice

GST is New Zealand's value-added consumption tax. It is charged at a single standard rate on most goods and services sold by GST-registered businesses. Because the exact percentage is set by government and can be adjusted, this guide deliberately avoids quoting a hard number - check the current rate on IRD before you set your prices.

GST-inclusive vs GST-exclusive pricing

You can present prices two ways, and choosing one consistently avoids confusion:

GST-inclusive - the headline price already contains GST. Common when selling to consumers, who only care about the final figure.
GST-exclusive - you show the net price, then add GST as a separate line. Common in business-to-business work, where clients reclaim the GST anyway.

Whichever you choose, your invoice should make the GST component visible. A typical layout shows the subtotal, the GST amount, and the total payable. This transparency is exactly what lets a GST-registered client claim the input tax credit.

How GST treatments differ

Not every supply is taxed the same way. The three broad categories you will encounter are:

Treatment	What it means	Typical examples
Standard-rated	GST charged at the standard rate	Most domestic goods and services
Zero-rated	Taxable but at 0% - you still record it	Exported goods, many services to overseas clients
Exempt	No GST charged and generally no input claim	Certain financial services, residential rent

The distinction between zero-rated and exempt matters more than beginners expect. Zero-rated supplies stay inside the GST system, so you record them and can usually still claim GST on related expenses; exempt supplies sit outside it. For most freelancers and agencies, the important case is zero-rating services supplied to overseas clients, covered below. If GST is new to you, our primer on VAT explained for beginners covers the same value-added-tax mechanics.

Do You Need to Register for GST?

This is the single biggest question for new NZ business owners, and it shapes how every invoice you send must look.

The turnover test

New Zealand uses a turnover threshold. If your taxable activity's turnover over a 12-month period reaches or is expected to reach a set amount, registration becomes compulsory. Below that level, registration is voluntary. The exact dollar threshold is set by IRD and can change, so verify the current figure before deciding - do not rely on a number a friend quoted you two years ago.

Compulsory vs voluntary registration

Compulsory - once your turnover hits the threshold (or you reasonably expect it to within the next 12 months), you must register and start charging GST.
Voluntary - even below the threshold, you may choose to register. This can make sense if you have significant GST-bearing expenses you want to claim, or if business clients expect a GST invoice.

Registering means you charge GST on sales, file GST returns on a chosen frequency, and can claim GST on eligible purchases. It also adds admin, so weigh it up honestly.

How to register

You register through your myIR account with Inland Revenue. You will need an IRD number for your business, and a New Zealand Business Number (NZBN) helps. Once registered, your GST number must appear on every taxable supply invoice you issue.

Invoice Numbering and Record-Keeping in New Zealand

Good numbering and record habits are not just tidy - they keep you compliant and audit-ready.

Numbering your invoices

New Zealand does not mandate a single official numbering format, but your numbers should be unique and sequential so nothing is duplicated or missing. A gap-free sequence makes reconciliation simple and signals professionalism. Common approaches:

Plain sequential: `INV-1001`, `INV-1002`, `INV-1003`.
Date-prefixed: `2026-001`, `2026-002`.
Client-coded: `ACME-001`, `ACME-002` for per-client tracking.

Pick one system and stay consistent. Our walkthrough on invoice numbering systems and rules covers the trade-offs.

Record-keeping rules

IRD requires businesses to keep financial records - invoices, receipts and GST workings - for a set minimum period. Confirm the current requirement with IRD, but the safe habit is to keep everything for several years and never delete a sales record early. Records can generally be kept electronically, which is why cloud storage and digital invoicing tools are so valuable for Kiwi businesses.

Keep both the invoices you issue and the supplier invoices you receive, since the latter support your GST and expense claims. Storing them digitally, backed up and searchable saves hours at tax time.

Currency and Cross-Border Invoicing

New Zealand businesses increasingly serve clients in Australia, the US, the UK and beyond. Here is how to handle the currency and GST angles.

Which currency to invoice in

For domestic clients, invoice in New Zealand dollars (NZD). For overseas clients, you can usually invoice in their currency (USD, AUD, GBP) if that is what you have agreed - but be clear about who absorbs exchange-rate movement and conversion fees. If you are GST-registered, you may still need to record the NZD equivalent for your GST return, so capture the exchange rate used.

Zero-rating services to overseas clients

This is the big one for freelancers and agencies. Many services supplied to clients who are outside New Zealand can be zero-rated for GST - meaning you charge 0% but the supply still sits inside the GST system. The eligibility rules hinge on where your client is and where the service is consumed, and they have nuances, so confirm your specific situation with IRD or an accountant before applying zero-rating.

The practical upshot: you generally do not add GST to a qualifying export of services, but you still record the sale and can usually claim GST on related costs. For the broader playbook, see our guides on how to invoice international clients and multi-currency invoicing best practices.

A Real-World Example: Invoicing as a Wellington Freelancer

Meet Aroha, a freelance UX designer based in Wellington. In her first year she stayed below the GST turnover threshold, billed two local startups and one client in Sydney, and was not GST-registered.

Her domestic invoices were simple: business name, IRD details, invoice number `INV-0007`, a clear description ("UX audit and prototype, 22 hours"), the NZD total, no GST line, and her bank account. Clean and compliant for a non-registered sole trader. For her Sydney client she invoiced in AUD, agreed the client covered conversion fees, and kept the exchange rate on file. No GST applied because she was not registered.

By year two, Aroha's bookings grew and she expected to cross the turnover threshold, so she registered for GST through myIR. Now her local invoices show her GST number, the net fee, a separate GST line and the GST-inclusive total. Her Australian work she now treats as a zero-rated export of services - confirmed with her accountant first - adding the explanatory note and recording the NZD equivalent for her GST return.

The lesson: Aroha's invoice format had to evolve the moment her tax status changed. The freelancers who get caught out keep using their old non-registered template after registering. Our guide for freelancers on getting paid faster pairs well with these compliance basics.

Pros and Cons of GST Registration for Small Businesses

Because registration reshapes your invoicing, it is worth weighing deliberately rather than drifting into it.

Pros

You can claim GST back on eligible business expenses - software, equipment, subscriptions and more.
A GST number signals an established, credible business to corporate clients.
B2B clients reclaim the GST you charge, so your real price to them is unchanged.
You are already set up the moment you cross the compulsory threshold - no scramble.

Cons

More admin: you must file GST returns on a regular cycle.
You must charge GST to consumers who cannot reclaim it, effectively raising your headline price.
Cash-flow timing matters - you collect GST and must remit it on schedule.
Mistakes carry real consequences, so you may need accounting help or solid software.

For a fuller decision framework, our overview of VAT/GST-style invoices and how to issue them is a useful companion.

When voluntary registration pays off

The voluntary-registration decision is rarely about the rules and almost always about your client mix and cost base. Run through these questions before you commit:

Who are your clients? If they are mostly GST-registered businesses, charging GST costs them nothing in real terms because they reclaim it. If they are mostly consumers, your headline price effectively rises.
How much GST do you pay out? Designers, developers and consultants with heavy software and subscription spend can claim meaningful GST back once registered.
How fast are you growing? If you can see the compulsory threshold approaching, registering early avoids a mid-year scramble and a confusing change of invoice format.

There is no universally right answer. A consultant billing large corporates usually registers without a second thought; a hobbyist selling small items to consumers may sensibly stay out until they have to join.

Payment Terms, Due Dates and Getting Paid On Time

Compliance gets you a valid invoice; clear terms get you actually paid. New Zealand does not impose a single statutory payment period for private contracts, so your terms are largely what you and your client agree - which means you should set them deliberately rather than leaving them blank.

Setting terms that work

Be specific. "Due within 14 days of invoice date" beats "on receipt" with no anchor. A concrete date prompts action.
Match terms to the relationship. New or one-off clients may warrant a deposit or shorter terms; trusted long-term clients can have more room.
Spell out late consequences in advance. If you intend to charge interest or a late fee, state it on the invoice and in your engagement agreement first.
Make paying effortless. Show your bank account clearly and offer an online payment option. Friction is the enemy of fast payment.

Following up without the awkwardness

Most late payments are not malicious - they are forgotten. A short, polite reminder a day or two before the due date, and again just after, recovers a large share of overdue invoices. Automating these reminders removes the emotional labor of chasing and keeps your tone consistently professional.

If late payment is a recurring pain, our guide on how businesses can reduce late payments lays out low-friction tactics.

Withholding Tax and Schedular Payments for Contractors

A New Zealand-specific wrinkle that catches many independent contractors is the schedular payment regime. Certain types of contract work have tax deducted at source by the payer before you are paid - similar in spirit to PAYE, but for contractors rather than employees.

If your work falls into a schedular payment category, the business paying you may be required to withhold tax and pass it to Inland Revenue on your behalf. Your invoice still shows your full fee (and GST if you are registered), but the amount you receive will be net of the withheld tax, which you reconcile against your income tax at year end.

Practical points:

Know your rate. Contractors can often elect a withholding rate within IRD's allowed range; getting this right avoids a nasty year-end bill or an oversized deduction.
GST is separate. If you are GST-registered, you still charge GST on the invoice as normal - withholding applies to the underlying payment, not the GST.
Keep the records. The payer should document what was withheld; keep it for your income tax return.

Because schedular payment rules are specific to the type of work and change periodically, confirm whether they apply to you with IRD or your accountant rather than assuming.

Quotes, Estimates and Credit Notes in the NZ Context

Invoicing rarely lives alone. Most New Zealand service businesses also issue quotes or estimates before the work and, occasionally, credit notes afterwards.

Quotes and estimates

A quote is a fixed price you commit to; an estimate is an informed best guess that may move. Being clear which one you are sending protects you from disputes when the final invoice lands. If you are GST-registered, show how GST will apply on the quote too. Our breakdown of quote vs estimate vs invoice is worth a read if these blur together.

Credit notes

When you need to reduce or reverse a previously issued invoice - a refund, an overcharge, or a canceled item - you issue a credit note rather than editing or deleting the original. For GST-registered businesses this matters: the credit note adjusts the GST you have accounted for, and IRD expects the supply information to reflect the corrected amount. Never simply delete a sent invoice; the gap in your sequence and the missing GST trail cause problems. Our guide to credit notes explained covers when and how to issue one.

Treating quotes, invoices and credit notes as one connected document trail keeps your records clean and your GST position accurate.

Common Mistakes When Invoicing in New Zealand

Avoiding these will keep you compliant and your cash flow healthy.

Charging GST when you are not registered. Never add a GST line or display a GST number unless you are actually registered. This is a serious error.
Forgetting your GST number once registered. If you are registered, every taxable supply invoice must carry it.
Mishandling overseas supplies. Wrongly standard-rating a service that qualifies for zero-rating (or vice versa) is common - confirm before you assume.
Reusing an old template after registering. Update your invoice the day your GST status changes.
Non-sequential or duplicate invoice numbers. Gaps and repeats undermine your records and look unprofessional.
Vague descriptions. "Consulting services" alone invites disputes; specify what, when and how much.
No clear due date. "Payable on receipt" with no date drags out payment - set explicit terms.
Poor record retention. Deleting or losing invoices before the required period is a compliance risk.

Our roundup of common invoice mistakes and how to avoid them expands on the universal pitfalls beyond the NZ-specific ones.

Best Practices for Invoicing Clients in New Zealand

Follow these steps to invoice cleanly and get paid on time.

Confirm your GST status first. Decide whether you are registered, and build your invoice template to match. Re-check whenever your turnover grows.
Use one consistent, gap-free numbering system. Sequential numbers make reconciliation and any IRD review painless.
Show GST transparently. When registered, display the net amount, the GST, and the total - never bury it.
State clear payment terms and a due date. Specify days (e.g. "due within 14 days") and your bank details or a payment link.
Handle overseas clients deliberately. Agree the currency, who covers fees, and confirm zero-rating eligibility before applying it.
Send invoices promptly. The sooner you bill after delivery, the sooner you are paid. Same-day beats end-of-month.
Keep digital copies of everything. Store issued and received invoices securely for the full retention period.
Automate reminders. Polite, scheduled follow-ups dramatically cut late payments without awkward chasing.
Verify current figures with IRD. Rates and thresholds change - confirm them at the source rather than from memory.

For tightening up the whole getting-paid process, our invoice best practices for getting paid on time guide is the natural next read.

Summary

To invoice clients in New Zealand properly, the essentials are: identify yourself and your client clearly, use unique sequential numbers, describe the work precisely, and handle GST correctly for your registration status. If you are not GST-registered, you issue a clean commercial invoice with no GST. If you are registered, you charge GST on most domestic sales, show it transparently, include your GST number, and provide taxable supply information that meets IRD's rules - while treating qualifying overseas services as zero-rated.

Because GST rates, thresholds and retention periods are set by government and can change, always confirm current figures with Inland Revenue or a qualified accountant. Get the fundamentals right and keep good digital records, and your invoicing stays compliant, professional and fast to pay.

Frequently asked questions

Do I need to be GST-registered to invoice clients in New Zealand?

No. You can invoice clients in New Zealand without being GST-registered, as long as your invoice clearly identifies you and your client, the work, and the amount. If you are not registered, you simply do not charge GST or display a GST number. Registration becomes compulsory only once your turnover reaches the threshold set by Inland Revenue, which you should confirm directly with IRD.

What information must a New Zealand tax invoice include?

A compliant invoice should show your business name and contact details, an invoice number and date, a clear description of the goods or services, and the total payable. If you are GST-registered, you must also include your GST number and supply taxable supply information that meets IRD's rules, with the level of buyer detail increasing for higher-value supplies. Always show GST as a visible component.

How do I charge GST on invoices to overseas clients?

Many services supplied to clients outside New Zealand can be zero-rated, meaning you charge GST at 0% but still record the supply. Eligibility depends on where your client is located and where the service is consumed, so confirm your specific case with IRD or an accountant. Add a note explaining the zero-rating and record the NZD equivalent of any foreign-currency amount for your GST return.

How long do I need to keep my invoices and records in New Zealand?

Inland Revenue requires businesses to keep financial records, including issued and received invoices and GST workings, for a set minimum period. The exact length is defined by IRD and can change, so confirm the current requirement. The safest habit is to retain everything for several years, store it digitally with backups, and never delete a sales record early in case of a review.

What is taxable supply information and how does it differ from a tax invoice?

Taxable supply information is the modern term New Zealand uses for the details a GST-registered seller must provide so buyers can support a GST claim. It replaced the older fixed "tax invoice" format with a more flexible, value-based set of requirements. In everyday use people still say "tax invoice," but the underlying obligation is to supply the right information for the size of the sale.

Can I invoice New Zealand clients in a foreign currency?

For domestic clients, invoice in New Zealand dollars. For overseas clients you can usually invoice in their currency if agreed, but be explicit about who absorbs conversion fees and exchange-rate movement. If you are GST-registered, you may still need to record the NZD equivalent and the exchange rate used for your GST return, so always capture that information at the time of invoicing.

When does a New Zealand business have to register for GST?

Registration is compulsory once your taxable turnover over a 12-month period reaches the threshold set by Inland Revenue, or when you reasonably expect to cross it within the next 12 months. Below that level you can register voluntarily, which can be worthwhile if you have significant GST-bearing expenses or B2B clients who expect a GST invoice. Confirm the current threshold with IRD before deciding.

Should I charge GST-inclusive or GST-exclusive prices?

Both are valid. GST-inclusive pricing shows the final figure and suits consumer sales, while GST-exclusive pricing shows the net amount with GST added separately and suits business-to-business work where clients reclaim GST. Whichever you choose, apply it consistently and make the GST component visible on the invoice so registered clients can claim their input tax credit cleanly.

How should I number my invoices in New Zealand?

There is no single mandated format, but your invoice numbers should be unique and sequential so none are duplicated or missing. Common systems include plain sequential numbers, date-prefixed numbers, or client-coded numbers. Pick one approach and stay consistent. A gap-free sequence makes reconciliation simple, supports your records, and signals a professional, well-run business to your clients.

Is this invoicing information official tax advice?

No. This guide is educational and explains how invoicing and GST generally work in New Zealand. It does not state current rates or thresholds as fact because those are set by government and change over time. For your specific situation, and to confirm any figure, consult Inland Revenue directly or engage a qualified New Zealand accountant or tax adviser.

Conclusion

Learning to invoice clients in New Zealand well comes down to two things: matching your invoice format to your GST status, and keeping clean, sequential, well-stored records. Whether you are an unregistered sole trader sending a simple NZD invoice or a registered agency zero-rating exported services, the principles are the same - be clear, be consistent, and be transparent about GST.

Because IRD sets the rates, thresholds and retention rules, and because they can change, treat this as a starting framework rather than the final word, and confirm the current figures with Inland Revenue or an accountant. Get the foundations right and your invoicing becomes a quiet, reliable engine for getting paid - instead of a source of stress at tax time.