How to politely chase an unpaid invoice (email templates)
Five email templates for chasing an unpaid invoice without sounding awkward or aggressive, plus when to send each one and what to do if there's still no reply.
Nobody enjoys sending a "just following up on this invoice" email. It feels like nagging, even when you're simply asking to be paid for work you've already done. The good news is that chasing an unpaid invoice doesn't need to feel personal or awkward if you have a clear sequence ready to go — the same handful of messages, sent at the same points, every time.
Why the wording matters more than you'd think
Most late payments aren't a client refusing to pay — they're a client who's forgotten, who's waiting on their own customer to pay them first, or whose invoice got buried in someone else's inbox. A good chasing email assumes the best of the client while still being specific and easy to act on. Vague ("just checking in!") wastes a message; aggressive ("this is now seriously overdue") burns a relationship you probably still want. The templates below sit in between: warm, direct, and impossible to misread.
Before you chase, get the basics right
A few things make every message below land better, regardless of how it's worded:
- Always include the invoice number, amount and due date in the email itself, not just as an attachment — busy people act on what's in front of them.
- Attach or link the invoice again every time. Don't assume they can find the original.
- Send from a real person, not a no-reply address, so a reply is easy and natural.
- Keep a record of what you've sent and when — you'll want it if the invoice keeps sliding and you need to escalate.
The five-message sequence
Sending the same shape of message at the same points, every time, is what makes chasing feel routine rather than confrontational — for you and for the client.
1. A few days before the due date
This isn't really a chase — it's a friendly heads-up that also serves as proof the client had every chance to notice.
Subject: Invoice #1042 due Friday
Hi Sam,
Just a quick heads-up that invoice #1042 for $840 is due this Friday, 3 October. I've attached it again in case it's easier to find than the original email.
Let me know if anything's needed from my end to get it processed.
Thanks, Priya
2. On the due date
Short, neutral, and easy to ignore if payment is already on its way — which is exactly the point.
Subject: Invoice #1042 — due today
Hi Sam,
Invoice #1042 for $840 is due today. If it's already been paid, please ignore this — otherwise, here's the invoice again for reference.
Thanks, Priya
3. One week overdue
Still friendly, but now naming the fact that it's late and asking a direct question rather than just restating the invoice.
Subject: Invoice #1042 — now a week overdue
Hi Sam,
Invoice #1042 for $840 was due last Friday and I don't see it come through yet. Could you let me know where it's at, or flag if there's an issue with the invoice I should sort out?
Happy to resend to a different contact if that helps.
Thanks, Priya
4. Two to three weeks overdue
This is where the tone shifts slightly: still polite, but stating the impact plainly and asking for a specific commitment rather than an open-ended update.
Subject: Invoice #1042 — overdue, need a payment date
Hi Sam,
Invoice #1042 for $840 is now three weeks past its due date. I understand things get busy, but I do need to know when I can expect payment, since it affects my own planning.
Could you confirm a date this week? I'm glad to discuss a part-payment now with the balance to follow, if that's easier on your end.
Thanks, Priya
5. Final notice before you escalate
Reserve this for invoices that have gone genuinely quiet — no response to two or three earlier messages. State what happens next, and actually follow through on it if you say it.
Subject: Invoice #1042 — final notice
Hi Sam,
This is a final follow-up on invoice #1042 for $840, now over a month overdue, with no response to my last two emails. I'd like to resolve this without it going any further — can you confirm a payment date by Friday?
If I don't hear back, I'll need to consider next steps, including a late fee as noted in my terms and, if necessary, referring the debt on.
Thanks, Priya
If there's still no reply
A phone call often gets a response an email doesn't — people find it harder to ignore a live conversation, and it's a chance to hear the real reason for the delay. If a call doesn't help either, consider a firm final letter (email plus a physical letter for larger amounts), and only then look at formal debt recovery or small claims processes, which vary by country — a local small-business advisor or your accountant can point you to what's actually worth pursuing for the amount involved.
Where a late fee fits in
If your invoice or quote mentioned a late payment fee upfront, the final-notice stage is usually the natural point to actually apply it, rather than threatening it earlier and not following through. What you're allowed to charge differs by country and generally needs to have been agreed before the job started — see late payment fees explained for the specifics, and check anything genuinely borderline with your accountant.
Let the first few messages send themselves
The templates above work well precisely because they're sent consistently and on time — which is exactly the part that's easy to let slip when you're busy running the actual job. InvoiceCharlie sends automatic reminders on a schedule you set, so the friendly nudge and the one-week follow-up go out on their own, and you only need to step in personally once things reach the final-notice stage. It also gives clients a portal to pay directly by card, which removes "I'll do a bank transfer later" as a reason for the invoice to keep sliding.
For getting the terms right in the first place — so fewer invoices need chasing at all — see payment terms explained and how to get paid faster. Need to send a one-off invoice right now with no account? The free invoice generator will have one ready in a couple of minutes.