How to Write a Late Payment Reminder (With Examples)

A payment reminder is a short business email, not a confrontation. Its job is to make paying you the easiest thing on someone’s to-do list — which means being specific, being easy to act on, and escalating gradually.

Here are four templates covering the whole sequence, and the rules that make them work.

Five rules for every reminder

1. Attach the invoice again. Never make someone search their inbox for it.
2. Reply on the original thread, so the full history sits in one place.
3. Put the facts in the subject line — invoice number and status.
4. Ask a specific question. “Can you confirm the payment date?” gets a reply; “just checking in” does not.
5. Stay polite. The person reading it is usually not the person who caused the delay.

1. Before the due date (3 days ahead)

The most valuable reminder is the one you send before anything is late. It catches missing PO numbers and approval problems while there is still time.

Subject: Invoice INV-0042 — due Friday 15 August

Hi Sarah,

Hope things are going well. Just a quick note that invoice INV-0042 for $2,400 is due this Friday, 15 August. I’ve attached it again for convenience.

If you need anything from me to process it — a PO number or any additional detail — just let me know and I’ll send it over today.

Thanks! Alex

2. On the due date

Neutral in tone. At this point it is almost certainly an oversight.

Subject: Invoice INV-0042 — due today

Hi Sarah,

Invoice INV-0042 for $2,400 is due today. I’ve attached a copy here.

If it’s already scheduled for payment, please ignore this — otherwise, could you let me know when I can expect it?

Many thanks, Alex

3. One week overdue

Firmer, still friendly, and now asking for a commitment to a date rather than a general acknowledgement.

Subject: Overdue: Invoice INV-0042 (7 days)

Hi Sarah,

Invoice INV-0042 for $2,400 was due on 15 August and is now a week overdue. I’ve attached it again.

Could you confirm the payment date, or let me know if there’s a problem with the invoice I can help resolve? If it’s stuck with accounts payable, I’m happy to contact them directly — just point me in the right direction.

Thanks, Alex

4. Formal final notice (30 days overdue)

Formal, factual and specific about what happens next. Only include consequences you will genuinely act on.

Subject: FINAL NOTICE — Invoice INV-0042, 30 days overdue

Dear Sarah,

Despite several reminders, invoice INV-0042 for $2,400 — issued 16 July and due 15 August — remains unpaid and is now 30 days overdue.

Under our agreed terms, overdue balances are subject to interest at 1.5% per month.

I’m requesting payment in full by 22 September. If payment or a written payment plan isn’t received by that date, I will begin formal recovery proceedings.

I’d much rather resolve this directly — please call me on 555-0142 if there is an issue I’m not aware of.

Regards, Alex Rivera

Adapting the tone

These are starting points, not scripts. A long-standing client who has always paid on time deserves a warmer note and more benefit of the doubt than a new client who has gone silent from the beginning. Match the escalation to the relationship and to the amount at stake.

One thing not to do is apologise for asking. “Sorry to bother you about this” invites the reader to treat the request as optional. You are following up on an agreed payment for delivered work — that is ordinary business, and it does not need softening.

If reminders stop working

After a final notice has been ignored, you are into recovery rather than reminding: a phone call, a formal demand, and then options such as a solicitor’s letter or small claims. What to do when a client doesn’t pay walks through that escalation.

Better still is not needing the sequence at all. Clear invoices with real due dates, agreed terms and a deposit where it is warranted prevent most late payments outright — see how to get clients to pay on time. You can create clean, professional invoices free with the Invora invoice generator.