A well-timed overdue invoice reminder email is the cheapest, fastest way to get an unpaid invoice paid — and most NZ tradies leave it far too late. The trick isn't writing a clever email; it's having a ready-made sequence you fire off on a schedule, so chasing money never sits at the bottom of your to-do list. Below are three copy-paste templates (friendly first reminder, firm second, and a final notice you can also send as an overdue invoice letter) plus a simple reminder schedule you can run on every job.
Why a sequence beats a one-off email
One polite "just checking in" email rarely gets the money. Customers triage their bills, and the supplier who follows up consistently — without getting nasty — gets paid first. A sequence does three things: it keeps the pressure steady, it documents that you chased (useful if you ever escalate to the Disputes Tribunal), and it removes the emotion. You're not deciding what to say each time; you're sending the next overdue invoice reminder template in the run.
Keep every overdue invoice email short, specific, and easy to action. Always include the invoice number, the amount, the original due date, and a payment link or bank account. Make it a 10-second job for the customer to pay.
The reminder schedule
This is the rhythm that works for most trade invoices on standard 7- or 14-day terms. Adjust the day counts to your own payment terms.
| Day | Channel | Tone | Goal |
|---|---|---|---|
| Day 0 | Invoice issued | Neutral | State due date and payment options clearly |
| Day 1 overdue | Email (reminder 1) | Friendly | Gentle nudge — assume it was just missed |
| Day 7 overdue | Email (reminder 2) | Firm but polite | Get a payment date committed |
| Day 14 overdue | Email + phone call | Direct | Final notice before escalation; pick up the phone |
| Day 21 overdue | Overdue invoice letter / formal demand | Formal | Last written warning before Disputes Tribunal or a recovery agency |
Notice the phone call at day 14. By then, email alone has usually run its course — more on that below.
Template 1 — Friendly first reminder (day 1)
Use this the day after the due date. Assume good faith; people genuinely forget.
Subject: Invoice {INV-1042} — friendly reminder
Hi {First name},
Just a quick reminder that invoice {INV-1042} for ${amount} was due on {date}. It may have slipped through — no stress.
You can pay by bank transfer to {account} or use this link: {payment link}. If you've already paid, please ignore this and thanks.
Any questions about the invoice, just reply here.
Cheers, {Your name}, {Business}
Template 2 — Firm second reminder (day 7)
No more "no stress." You want a payment date in writing.
Subject: Overdue: invoice {INV-1042} — please advise payment date
Hi {First name},
Invoice {INV-1042} for ${amount} is now 7 days overdue (due {date}). I haven't received payment or heard back.
Can you please let me know today when this will be paid? If there's an issue with the invoice or the work, tell me and we'll sort it.
Payment details: {account} / {payment link}.
Thanks, {Your name}, {Business}
This overdue invoice reminder email template does the heavy lifting on most jobs — it's firm, it asks a direct question, and it invites them to flag a genuine dispute early.
Template 3 — Final notice / overdue invoice letter (day 14–21)
This is your last written step. Send it as an email and, for larger amounts, also post or attach it as a formal overdue invoice letter on your letterhead so there's a clear paper trail.
Subject: FINAL NOTICE — invoice {INV-1042} now {X} days overdue
Dear {First name},
Despite previous reminders, invoice {INV-1042} for ${amount}, due {date}, remains unpaid and is now {X} days overdue.
This is a final request for payment. Please pay the full amount by {date — 7 days away} to {account}.
If payment is not received by that date, I'll have no choice but to refer this matter to the Disputes Tribunal or a debt recovery agency, and any costs and interest permitted under our terms may be added.
Payment details: {account} / {payment link}.
{Your name}, {Business}
That closing line only mentions interest if your written terms actually allow it — see our guide on overdue invoice interest in NZ before you threaten to charge it. The same firm-but-fair structure works whether you call it a final unpaid invoices letter, a demand, or an overdue invoice letter; what matters is the clear deadline and the stated consequence.
When to stop emailing and pick up the phone
Email is brilliant for the first two reminders. After that, the law of diminishing returns kicks in: if someone has ignored two emails, a third rarely changes anything. A two-minute phone call gets a yes/no and a date far faster than another overdue invoice email. Ring them at day 14, be friendly, and ask plainly: "When can I expect payment on invoice 1042?"
The problem is that most tradies hate making that call — it's awkward, you're on the tools all day, and the longer the debt drifts the harder it gets to recover. That's the gap a done-for-you calling service fills. At TradeFlow we make those follow-up calls for you, in a professional and friendly way, so you keep the customer relationship and still get paid. For the wider process around all of this, see our guides on how to collect unpaid invoices in NZ and how to write invoices that get paid.
Frequently asked questions
How many overdue invoice reminder emails should I send before escalating?
Two to three is plenty. A friendly first reminder, a firm second, then a final notice or overdue invoice letter. If three written reminders and a phone call don't get a payment date, it's time to escalate to the Disputes Tribunal or a recovery agency rather than send a fourth email.
Is an overdue invoice letter different from an overdue invoice email?
The content is almost identical — same invoice details, deadline, and consequence. The difference is formality and proof. A posted or letterhead overdue invoice letter creates a stronger paper trail for larger amounts, while an overdue invoice email is faster for routine chasing.
Can I just reuse one overdue invoice reminder template every time?
You can, but a short sequence works better. Escalating tone — friendly, then firm, then final — signals you're serious without burning the relationship. Save the three templates above and send the next one in the run on schedule.
What should every unpaid invoices letter include?
The invoice number, amount, original due date, a clear new payment deadline, payment options, and one specific consequence if it isn't met. Keep it short and never abusive — see your obligations in our guide on debt collection laws in NZ.
Sources
- business.govt.nz — getting paid: https://www.business.govt.nz/getting-paid/
- Disputes Tribunal: https://www.disputestribunal.govt.nz/
- Fair Trading Act 1986: https://www.legislation.govt.nz/act/public/1986/0121/latest/DLM96438.html
- Contract and Commercial Law Act 2017: https://www.legislation.govt.nz/act/public/2017/0005/latest/DLM6844033.html
Update log
- 16 June 2026 — Published. Figures fact-checked against New Zealand government sources, including the Disputes Tribunal’s $60,000 jurisdiction limit (effective 24 January 2026, Ministry of Justice) and the six-year limitation period under the Limitation Act 2010. See Sources above.
Last reviewed: 16 June 2026.