| eInvoicing is the exchange of an invoice as structured data, sent from one accounting system straight into another across the Peppol network. Because the invoice arrives as data the receiving ledger can read, nobody prints it, keys it in or reads a bank account number off a page. |
Your supplier emails an invoice as a PDF. An attacker who has been sitting in that mailbox for a fortnight edits two lines on the way through: the bank account number and the payment reference.
Your accounts person has no reason to query it. It is the real invoice, the amount matches the job, the logo is right, and the one altered detail is the one nobody checks.
Say it is a $24,000 progress payment, to use an illustrative figure. It leaves on the Friday. Three weeks later the supplier rings to ask where it has got to, and by then the money is gone, the supplier is still owed, and you pay the same invoice twice.
The National Cyber Security Centre recorded $5.6 million of direct financial loss across New Zealand in the first quarter of 2026. Forty-two incidents of $10,000 or more accounted for $5.4 million of that. Scams and fraud was the second most reported category, carrying about $3.8 million of loss.
Send that invoice as structured data and the mailbox drops out of the journey. It moves between two accredited access points, with no email for anyone to intercept and no bank account number for anyone to retype.
Fraud is one reason owners make the change. The other is cash. Government agencies now work to a five business day payment clock, and the keying and chasing around a paper process comes off your books at the same time.
What Is eInvoicing?
eInvoicing is a way of sending an invoice as structured data so the receiving accounting system can read it without a person in the middle. Every piece of information carries a label the software recognises. The supplier name, the amount, the GST and the payment terms all land in the right fields on arrival.
The difference from a PDF is what it makes the receiver do. Someone has to read a PDF, or an optical character recognition tool has to guess at it. Optical character recognition reads text off a page image, gets most of it right, and hands your bookkeeper the exceptions to fix.
Structured data skips both steps. The invoice arrives matched to a supplier record, carrying its purchase order reference, and it lands in the approval queue within minutes.
You will see it written as e-invoicing or electronic invoicing as well, and an e-invoice is the same document under another name, though NZ government material uses the single-word spelling.
Large firms have swapped invoices as data for decades using electronic data interchange, usually shortened to EDI. EDI needs a bespoke arrangement with every trading partner, so it stayed the preserve of companies with an IT department. Peppol replaces that with one connection reaching every registered participant, and a 20 person business can use it.
How is an eInvoice different from a PDF invoice?
Somebody has to interpret a PDF before it can be processed, and an eInvoice arrives ready to go. The PDF route means a person opens the email, checks the invoice against a purchase order, types the figures into the ledger and files the attachment.
Accounts payable teams call that check the three-way match: the invoice, the purchase order and the delivery record all have to agree. With structured data the match runs on the fields themselves, and only the disagreements reach a person.
What does the invoice data contain?
An eInvoice carries the same information a paper invoice does, written as labelled fields the software can act on. Supplier identity, invoice number, dates, line items, GST, totals and payment terms all travel as named values.
New Zealand and Australia share a specification for this called PINT A-NZ, the trans-Tasman version of the Peppol International, or PINT, billing specification. It fixes which fields an invoice must carry and how they are written. A ledger on either side of the Tasman then reads the same document the same way.
Nobody in your office will read that specification. It matters to the developer connecting a bespoke system, and to nobody else in the building.
How Does an eInvoice Travel Between Two Businesses?
An eInvoice travels through what the framework calls a four-corner model, where each party connects by way of its own gateway. Your software hands the invoice to your access point, that access point delivers it to the buyer’s access point across the network, and the buyer’s system receives it ready to process.
Peppol stands for Pan-European Public Procurement Online, and it is the framework New Zealand and Australia adopted for the job. MBIE became a Peppol Authority in October 2019 and accredits every access point provider operating here, due diligence and security checks included.
Peppol runs across dozens of countries, so one connection reaches your Australian customers without a second arrangement.
What is a Peppol access point?
A Peppol access point is the accredited gateway that puts a business on the network. Most small businesses never deal with one directly, since the accounting platform bundles it into the subscription they already pay for.
Where a platform has no built-in connection, a specialist provider supplies the access point and passes documents through on your behalf. MBIE keeps the register of accredited providers and monitors how they perform.
Behind the network sits a directory called a service metadata publisher, the address book one access point uses to find another.
Who can see the invoice on the way?
Only four parties see it: the sender, the receiver and the two access points carrying the document. MBIE states that neither the government, including Inland Revenue, nor any other third party has visibility of eInvoices crossing the network.
Owners ask this in most conversations about the change, usually assuming a government-adopted network means government eyes on the ledger. It does not work that way. The two gateways are commercial businesses operating under contract, and the invoice is visible to nobody else along the route.
What Do You Need to Start Sending eInvoices?
You need three things: accounting software that can send eInvoices, your own New Zealand Business Number, and your customer’s number so the invoice can be addressed. Most businesses already hold two of the three without realising it.
The New Zealand Business Number, or NZBN, is the identifier that routes the document. Receiving from a government agency depends on that agency holding your NZBN, and sending to one depends on you holding theirs plus whatever invoice reference that agency requires.
Your customer records are the third piece, and they cause most of the trouble. A record carrying a stale trading name or no number at all routes nowhere. The data tidy-up your bookkeeper keeps postponing turns out to be the first job.
Which accounting platforms can send an eInvoice?
Most of the mainstream cloud platforms can, with Xero and MYOB the two New Zealand small businesses already run. MBIE publishes a list of enabled software products, and there are more than sixty of them.
Turning the capability on is a settings change. The work sits in the checking that follows. An invoice addressed to a customer who cannot receive it bounces back as a failed delivery.
Older desktop accounting software is the common blocker. On a system with no Peppol path the choice is between upgrading the platform and bolting an access point onto the side.
The checklist above covers what has to be in place before the first one goes out.
Do Government Agencies Pay eInvoices Faster?
Yes. Under the New Zealand Government Procurement Rules, now in their fifth edition, mandated agencies had to be able to send and receive eInvoices by 1 January 2026. Under the same prompt payment rules they must pay 95 percent of supplier eInvoices within five business days, against 10 business days for other domestic trade invoices.
If you are used to waiting until the twentieth of the following month, do the arithmetic on that. On $40,000 of monthly government billing, moving from a 45 day wait to a 5 day wait releases about $53,000 of cash that had been sitting in receivables.
MBIE publishes the full list of agencies with each one’s NZBN and whether it can send, receive or both. Check a customer against that list before you try to send, since capability still varies from agency to agency.
The rules moved again in October 2025. From 1 January 2027 agencies have to require their large suppliers, meaning entities with total annual revenue above $33 million, to send eInvoices.
If you subcontract to one of those large suppliers, you will feel it second-hand. Head contractors push the requirement down the chain once they have a date of their own to meet.
Councils are on it too. Christchurch City Council and Wellington City Council both appear as able to receive, so any business invoicing either one is already inside the change.
Is eInvoicing mandatory in New Zealand?
No, not for a small business. There is no general mandate covering business-to-business invoicing in New Zealand, and nothing obliges you to send or receive one today. The obligations sit on government agencies, and from 1 January 2027 those agencies have to require it of their large suppliers.
Can eInvoicing Stop Invoice Redirection Fraud?
Yes, on any invoice that travels across the network. There is no email in the path to intercept and no bank account number for anyone to retype. An invoice arriving through an accredited access point comes from a registered participant and lands in the ledger unaltered.
How does invoice redirection fraud work?
An attacker gets into a mailbox, watches the invoice traffic for a while, then either edits a genuine invoice in transit or sends a convincing new one carrying different bank details. The industry calls the wider technique business email compromise, usually shortened to BEC, and invoice redirection is its most profitable form.
The attacker needs no further access after the mailbox. Everything that follows uses your own documents and your own supplier relationships, which is why your finance person sees nothing out of the ordinary.
Email controls stay the first line of defence for everything still arriving by email, and the practical steps for that sit with email security best practices.
One habit survives the change to structured data. Verify any bank account change by ringing a number you already hold, whatever channel the request came in on.
Insurers ask about this now. When a cyber policy application asks how you verify a change to a supplier’s bank account, your answer has to cover a phone call as well as an email.
How Much Does eInvoicing Cost a Small Business?
Very little in software and a day or two in setup. For most small businesses the capability already sits inside the accounting subscription they pay for. The figures below are indicative ranges for a South Island business of around 30 staff.
| What you pay for | What it covers | Typical range |
|---|---|---|
| Accounting platform capability | Sending and receiving through the platform’s built-in Peppol connection | No extra charge on Xero Business Edition or MYOB Business |
| Access point subscription | A gateway for a system with no built-in connection of its own | Commonly $20 to $80 a month, banded by document volume |
| Setup and testing | Switching on receiving, checking the NZBN and running one live invoice with a customer | Half a day to two days of provider time, around $600 to $2,400 |
| Trading partner onboarding | Confirming which customers and suppliers can exchange, and correcting their records | A few hours of internal time across the first month |
| Ongoing running | Watching for failed deliveries and adding new trading partners | No new line item, folded into normal bookkeeping |
Where does the saving come from?
The saving comes from keying time on the payables side and waiting time on the receivables side. Picture an illustrative business handling 200 supplier invoices a month.
MBIE puts the saving from switching an emailed PDF invoice to an eInvoice at a conservatively estimated $11 each. On 200 invoices a month that is $26,400 a year, before you count the miskeyed invoice number that stalls an approval or the duplicate payment somebody has to claw back.
New Zealand exchanges more than 300 million business to business invoices a year, and MBIE puts the productivity gain at a conservatively estimated $800 million a year.
The receivables side is harder to price and usually the bigger number. A New Zealand small business waits around 24 to 25 days on average to be paid. Get paid in five days by a government customer and you can commit the following month to things you would otherwise defer.
How Do You Set Up eInvoicing?
Switch on receiving before you start sending, then move one trading partner at a time. Send an invoice nobody can receive and you get a failure notice and a phone call, so get the receiving side working first.
- Check your accounting platform’s Peppol capability and turn on receiving. On the mainstream cloud platforms you will find the switch under the organisation settings.
- Confirm your NZBN is correct and current on the Business Register, since that identifier is what routes documents to you.
- Tell your largest customers you can receive eInvoices, and ask which of them are able to send.
- Send one live invoice to a single willing customer and watch it arrive in their ledger before you go wider.
- Work through the customer list in order of invoice volume, collecting the ones that cannot receive yet.
- Keep those exceptions on a written list with a review date, since platform capability shifts every few months.
Everybody skips the exception list. Write it down, or you end up running two processes with nobody sure which customers sit in which.
What should you do this week?
Open your accounting platform and check whether receiving is switched on. It takes about five minutes and there is no cost attached to the receiving side.
Then look at your top ten customers and count how many are government agencies or suppliers above the $33 million threshold. Anyone in that count has a 1 January 2027 deadline of their own.
What Does eInvoicing Not Fix?
eInvoicing does not fix approval delays, disputed invoices or a customer who has decided to pay late. The network delivers the document faster, and everything downstream of delivery stays a business process with people in it.
- An invoice still needs approving, so an approval queue that takes three weeks will take three weeks with better input data.
- A customer on 60 day terms will still pay on 60 day terms, since payment terms are a contract question and no network overrides them.
- Systems inside the business still have to talk to each other, and wiring a ledger to a job management or payroll system belongs to business software integration.
- A vertical platform that already issues its own invoices needs its own assessment, which applies to dispatch systems of the kind covered in freight software.
Accounting practices feel the shift before their clients do. They touch more ledgers in a week than any one business does in a year, and the technology behind that workload is covered in IT for accounting firms.
None of that is an argument for waiting. The receiving side costs nothing to enable and the sending side gets easier every month as more customers register.
Get Your Invoices Out of the Inbox
Exodesk has supported South Island businesses since 1989 and works with organisations across Canterbury, Otago and Southland from offices in Christchurch and Dunedin. We check your accounting platform, connect an access point where one is needed, and get you running with your biggest trading partners first. Our business software work covers the wider finance workflow while we are in there.
Contact us today to discuss how we can help your business or connect with us on LinkedIn to stay updated with more insights.
Frequently Asked Questions
What is an eInvoice in simple terms?
An eInvoice is an invoice delivered as computer-readable data straight into the buyer’s accounting software, with no PDF and no manual entry. The buyer sees it appear in their ledger already filled in and waiting for approval.
Does emailing a PDF count as eInvoicing?
No. A PDF attached to an email is a picture of an invoice that a person or a scanning tool still has to interpret, so the manual work and the vulnerable mailbox both stay in the process. eInvoicing means the invoice itself moves as structured data across the Peppol network.
Do I need new software to send an eInvoice?
Most businesses do not, because the major cloud accounting platforms include the capability in the business plans they already pay for. A business running older desktop software or a bespoke system needs either an upgrade or a connection through an accredited access point.
What is an NZBN and why does an eInvoice need one?
The NZBN is the New Zealand Business Number, a unique identifier held by every registered New Zealand business. An eInvoice needs it the way a letter needs an address, because the network uses the NZBN to work out which participant a document belongs to. Sending to a government agency also depends on holding that agency’s own NZBN. The numbers are free to look up on the New Zealand Business Register.
Which government agencies can receive an eInvoice?
Most central government agencies can, along with a number of councils including Christchurch City Council and Wellington City Council. MBIE publishes the current list with each agency’s NZBN and whether it can send, receive or both. Agencies covered by Government Procurement Rule 44 were required to have the capability in place by 1 January 2026.
Is there a fee for each eInvoice sent?
On the major accounting platforms there is no per-invoice charge, because sending and receiving form part of a subscription the business already holds. Firms connecting through a standalone access point provider usually pay a monthly fee, sometimes banded by document volume. Ask a provider how its pricing behaves in your busiest month. Most small businesses never reach a volume where the fee becomes material.
Can a customer who is not on the Peppol network receive our eInvoice?
No. Both parties have to be reachable on the network, so an invoice addressed to a customer who has never registered comes back as a failed delivery. Keep those customers on the old process and check again every few months, because registrations are climbing steadily.
What happens if a supplier sends a fake eInvoice?
A fake eInvoice is far harder to send than a fake email, because the sender has to be a registered network participant reachable through an accredited access point. The control that matters is unchanged: verify any change to a supplier’s bank account by ringing a number you already hold.
How long does it take a small business to get set up?
About a week of elapsed time for a small business on a mainstream cloud platform, and only a few hours of anybody’s actual attention. Switching on receiving takes minutes, the NZBN check takes minutes, and the rest is one test invoice followed by a walk down the customer list.
Can a Christchurch or Dunedin business get help with eInvoicing?
Yes. Exodesk works with businesses across Canterbury, Otago and Southland from offices in Christchurch and Dunedin, and has operated in the South Island since 1989. We handle the platform settings, the access point connection where one is needed, and the trading partner testing that catches problems early.
Do I have to use eInvoicing if I do not sell to government?
No. A business that never invoices a government agency is under no obligation to send eInvoices, and New Zealand has no general business-to-business mandate. The pressure comes from customers, and large buyers are adding the requirement to their contracts.
Where should a business start with eInvoicing?
Start by switching on the ability to receive, because it costs nothing and puts the business on the network for every customer already sending. Then check the NZBN, pick one cooperative customer and send a single live invoice before touching the rest of the ledger. The first step fits inside an afternoon.
