Start on the first business day after your documented due date: confirm the invoice matches what the buyer approved, including your IRD number when GST applies, taxable supply information where required, purchase order references, and New Zealand dollar totals. Send a short, factual email with invoice number and balance, then repeat on a predictable cadence. Offer one clear way to pay. If the balance is material and silence continues, call accounts payable, log promises, then brief a lawyer about letters of demand or court pathways. Remember the Disputes Tribunal cannot act as a debt collection agency when someone admits they owe the debt but still will not pay (Disputes Tribunal of New Zealand, What the Tribunal can help with, updated 23 January 2026).
This article is practical guidance only and is not legal advice.
Strategy
Effective follow-up pairs readable invoices with timing that respects your written terms and calm repetition. When you invoice central government agencies, prompt payment rules and published agency results help you benchmark behaviour before you assume bad faith.
Payables teams clear queues in batches. A polite, factual nudge returns your file to the top without sounding adversarial. For government suppliers, agencies report quarterly payment performance to the Ministry of Business, Innovation and Employment, which publishes consolidated results (Ministry of Business, Innovation and Employment, Government agencies' invoice payment times, updated 5 March 2026).
Send a neutral check-in on the first business day after the due date in your contract or invoice, unless you granted a different grace period in writing. Many New Zealand business invoices use twenty-day or end-of-month terms, but only the wording you and the buyer agreed counts. If you are GST registered, fix taxable supply information gaps before you argue about lateness, because metadata errors give payables a legitimate stall (Inland Revenue, taxable supply information guidance hub).
Assume every message may be forwarded. State the amount, invoice number, due date, and bank details or payment link. Ask for a pay date or for the accounts payable contact who owns the ticket. Michael Alp, New Zealand Government Procurement General Manager and co-Chair of the Australian New Zealand eInvoicing Board, told Ministry of Business, Innovation and Employment media in January 2026 that new prompt payment and eInvoicing rules aim to improve cash flow for businesses, especially small businesses, while setting a high standard for financial efficiency and transparency across the public sector.
Most stalls trace back to metadata: wrong trading name, missing purchase order, or a line total that does not match the accepted quote. Tie each line item to the approved scope, keep the same thread for reminders, and fix errors quickly so the due date argument stays on solid ground.
The Tribunal can help with genuinely disputed debts and several contract disagreements, but it cannot help when the person owing the money agrees they owe the debt but simply does not pay, because you cannot use it as a debt collection agency (Disputes Tribunal of New Zealand, What the Tribunal can help with). Civil matters above sixty thousand dollars New Zealand typically head to the District Court unless another pathway applies.
Sources
These points come from MBIE agency reporting and Disputes Tribunal guidance, not generic blog advice. They explain why disciplined follow-up is a cash-flow control, not a personality trait.
For the October to December 2025 quarter, Ministry of Business, Innovation and Employment reporting showed 95.6 per cent of government agency invoices were paid within ten working days across a grand total of 1,748,459 invoices, while ninety-two of one hundred and six surveyed agencies paid more than ninety per cent of invoices within ten working days (Ministry of Business, Innovation and Employment, Government agencies' invoice payment times, updated 5 March 2026).
Ministry of Business, Innovation and Employment (2026). View source
The Disputes Tribunal states it cannot deal with debts when the person owing the money agrees they owe the debt but does not pay anyway, because you cannot use the Tribunal as a debt collection agency, while it can help with disputed debts among the disputes it accepts (Disputes Tribunal of New Zealand, What the Tribunal can help with, updated 23 January 2026).
Disputes Tribunal of New Zealand (2026). View source
Workflow
Work through verification, written reminders, phone contact, documentation, and escalation in order. Adjust for government procurement channels, finance-company payment plans, or sector-specific contracts, but keep the sequence consistent.
Re-open your PDF and confirm the legal or trading name matches the buyer master data, your IRD number is correct, GST lines appear only when your registration status allows it, line items match the accepted quote, and any purchase order or reference fields are complete. If you find errors, send a corrected document and note the change clearly.
Tip: Cross-check mandatory fields with Invoice Mama's New Zealand tax invoice guide so payables cannot park the file for missing taxable supply information.
Use a subject line that includes the invoice number. Paste the New Zealand dollar amount, due date, payment instructions, and ask for confirmation of the pay date or for the accounts payable specialist handling the invoice.
Shorten the body to bullet facts. Note that this is the second notice. Only mention interest or recovery costs if your contract or engagement letter already allows them and you have verified the clause with a lawyer.
On the phone, mirror the email facts. Ask whether the invoice is in the finance system, whether it sits in a dispute queue, and who can commit to a pay date this week. Write down names, extensions, and promised dates.
Store PDF invoices, email threads with time stamps, call notes, and payment promises in your job management or accounting tool. Export accounts receivable ageing monthly so you can show a disciplined history if you later need mediation or court assistance.
After a documented internal cadence fails, brief a New Zealand solicitor about letters of demand, statutory demands where relevant, or District Court pathways for balances above Tribunal limits. Use the Disputes Tribunal when there is a genuine dispute about the debt or contract, not when the buyer admits the balance but delays payment (Disputes Tribunal of New Zealand, What the Tribunal can help with). You usually need to make a Tribunal claim within six years after the event that caused the dispute (Disputes Tribunal of New Zealand, How to make a claim, updated 24 November 2025).
Tip: Citizens Advice Bureau and Community Law Centres can help you understand low-cost options before you commit to filing fees.
Checklists
Use these lists as guardrails before you press send. Swap in your brand voice, but keep the facts intact.
Pitfalls
Most self-inflicted damage comes from skipping preparation, not from sending one extra reminder.
Problem
Long narratives about personalities give payables an excuse to park the ticket while an internal review runs.
Fix
Keep relationship issues on a separate note, but keep the collections thread limited to invoice data and promised pay dates.
Problem
Unilateral penalties you invent mid-contract erode trust and are often unenforceable unless a clause already covers them.
Fix
Only reference fees or interest that already appear in a signed contract or statutory instruments your lawyer confirmed, and show the maths exactly as written.
Problem
Buyers delay payment when GST lines do not match your lawful registration status or when taxable supply information is incomplete for the supply value.
Fix
Fix the document first, apologise once if the delay was your metadata error, then restart the reminder cadence from a clear baseline.
Problem
The Tribunal explicitly excludes debts where the debtor agrees they owe the money but still will not pay, because it is not a debt collection agency (Disputes Tribunal of New Zealand, What the Tribunal can help with).
Fix
Map the dispute first with a lawyer: admitted non-payment usually needs a different enforcement pathway than a contested invoice.
Plain-language answers for New Zealand freelancers, tradies, and office managers who handle their own receivables.
Open with facts: invoice number, balance in New Zealand dollars, due date, and payment instructions. Ask for a pay date or the accounts payable contact. Attach the same PDF again, keep one email chain where practical, and stay neutral in tone so the message can be forwarded without embarrassment.
Send it on the first business day after the due date defined in your contract or invoice unless you documented a different grace period. If you use calendar-day terms, count consistently with what you wrote on the quote and the invoice.
Email first so payables has a searchable record. Call if there is no substantive reply within forty-eight to seventy-two business hours or if the balance is material. On the phone, repeat the same facts as the email and log who owns the next step.
Use a subject line that includes the invoice number, then three short lines for amount due, due date, and a polite request for payment or for the buyer to flag a processing issue. Close with one question such as "Can you confirm the pay date this week?"
Many New Zealand operators pair a day-one email with a second note midweek and a phone call by the end of week one for material balances. Government and enterprise purchase orders can need longer loops, so document those variances in your credit policy.
Only if your contract allows suspension after notice, or if safety or regulatory duties require a pause. Otherwise stopping work can expose you to breach claims. Prefer documented holds on discretionary scope after legal advice.
You can use the Tribunal for genuinely disputed debts among the disputes it accepts, but not when the person agrees they owe the money yet still refuses to pay, because the Tribunal is not a debt collection agency (Disputes Tribunal of New Zealand, What the Tribunal can help with). Take legal advice on admitted debts.
The Tribunal states you usually need to make a claim within six years after the event that caused the dispute, and if you cannot meet that window you should talk with a lawyer (Disputes Tribunal of New Zealand, How to make a claim).
Agency reporting mainly benchmarks Crown behaviour. From 1 January 2026, Procurement Rule 36 lifts the published target so agencies pay ninety-five per cent of domestic invoices within ten working days, with tighter eInvoice timelines also described on New Zealand Government Procurement pages (Ministry of Business, Innovation and Employment, Government agencies' invoice payment times). Use it as a reference when you tender to agencies, not as a private debtor rule.
Store PDF invoices, email threads with time stamps, call logs with names, and payment promises. Export accounts receivable ageing monthly. Consistent records show you made reasonable commercial efforts before you escalated.
Invoice Mama publishes Australian timing, scripts, and Australian Small Business and Family Enterprise Ombudsman context at /guides/au/how-to-follow-up-on-unpaid-invoices when you chase balances under Australian terms.
Keep learning
New Zealand GST and invoicing playbooks plus Tasman habits when you compare regimes.
Taxable supply information tiers, GST numbers, buyer identifiers, and twenty-eight day requests.
Read guideNet periods, due dates on quotes and invoices, and policy context before you chase balances.
Read guideIRD thresholds, myIR registration, and how GST appears on the documents you later chase.
Read guideHow flexible evidence and buyer requests interact with the invoices you send before reminders.
Read guideIRD numbers, NZBN habits, and payment terms before balances age.
Read guideSite references, IR330C, GST lines, Construction Contracts Act notices, and the clean invoices you later chase.
Read guideAustralian reminder cadence, ASBFEO pathways, and Payment Times Reporting context.
Read guideNet terms and Internal Revenue Service adjacent record habits when you bill United States buyers.
Read guideFrom reminders to paid
You set payment expectations in the quote and the bill. Invoice Mama helps you issue branded invoices, keep terms and IRD identifiers visible, and stay consistent when it is time to nudge accounts payable.