Invoice Reminder Emails: When to Send Them and Templates That Get You Paid

An invoice reminder email is a short, polite message that prompts a customer to pay an invoice, sent on a schedule around the due date. Send the first one a few days before the invoice is due, another on the due date, then follow up roughly every 7 to 14 days after, getting a little firmer each time. Below are the timing, the wording, and five ready-to-use templates for each stage, from the friendly pre-due nudge to the final notice.

When should you send an invoice reminder?

Send invoice reminders on a fixed cadence tied to the due date, not whenever you happen to remember. A reliable schedule is: one reminder 3 to 7 days before the due date, one on the due date itself, then follow-ups at roughly 7, 14, 30, and 60 days past due. The pre-due reminder is the one most businesses skip and the one that prevents the most late payments, because it catches the invoice while it is still top of mind and easy to pay.

The exact spacing should match your terms and your customers, but the principle holds everywhere: consistent, predictable timing beats sporadic chasing. Customers learn quickly whose invoices get followed up on, and they pay those first.

How do you politely remind a client to pay an invoice?

Keep it short, specific, and easy to act on. A good reminder names the invoice number and amount, states the due date plainly, includes a one-click payment link, and makes a single clear ask, without apologizing for asking. You are reminding someone of a commitment they already made, so there is no need to soften it into vagueness. Politeness comes from the tone and the benefit of the doubt, not from burying the request.

The firmness should track the age of the invoice. Early reminders assume good faith and read like a helpful heads-up. Later ones stay respectful but get direct, reference the prior messages, and ask for a specific payment date. This progression from soft to firm is the heart of a dunning sequence, and getting it right is what keeps you paid without damaging the relationship.

Invoice reminder email templates

Here are five templates you can adapt. Swap in your details, keep them short, and always include a payment link.

1. Before the due date (3 to 7 days out)

Subject: Invoice 2047 due June 15
Hi Sam, a quick heads-up that invoice 2047 for $4,820 is due on June 15. You can pay securely here: [payment link]. Thanks so much, and just reply if you have any questions.

2. On the due date

Subject: Invoice 2047 is due today
Hi Sam, invoice 2047 for $4,820 is due today, June 15. Here is the payment link for convenience: [payment link]. If it is already scheduled, please ignore this note. Thanks, Sam.

3. Gently past due (7 days late)

Subject: Invoice 2047 now past due
Hi Sam, invoice 2047 for $4,820 was due on June 15 and is now 7 days past due. You can pay here: [payment link]. If it is on its way, thank you, and if anything is holding it up, just reply and let me know.

4. Firm follow-up (30 days late)

Subject: Action needed: invoice 2047, 30 days past due
Hi Sam, invoice 2047 for $4,820 is now 30 days overdue, and my earlier reminders on June 12 and June 22 may have been missed. Could you let me know a date we can expect payment, or pay directly here: [payment link]? Happy to sort out anything that is blocking it.

5. Final notice (60+ days late)

Subject: Final notice: invoice 2047, 60 days past due
Hi Sam, invoice 2047 for $4,820 is now 60 days past due despite several reminders. Please arrange payment by June 30 using this link: [payment link], or reply to set up a payment plan. If we do not hear back, the account will move to our next collections step. I would much rather resolve this directly with you.

How often should you send payment reminders?

Follow up about every 7 to 14 days once an invoice is overdue, tightening the cadence as it ages. The table below is a reliable default you can adjust to your terms:

Notice how the channel widens as the invoice ages. Email carries the early stages, but a single channel stops working on the invoices that matter most, so a strong process adds SMS and then a phone call for the stragglers. Layering channels this way is what separates reminders that get ignored from automated payment reminders that actually get you paid.

What do you say when email stops working?

When two or three emails go unanswered, change the channel, not just the wording. A short SMS ("Hi Sam, invoice 2047 for $4,820 is 21 days past due, here is the payment link") often gets a response the same day, because it lands somewhere different. If that fails, a brief, respectful phone call to confirm the invoice and ask for a payment date is the most effective single step in collections. The goal of every one of these touches is the same: a specific commitment to pay, and prompt follow-up if that commitment slips. For the full playbook, see how to get customers to pay invoices faster.

Automating the whole reminder sequence

Sending these emails by hand, on time, every time, for every invoice, is where good intentions quietly break down. It is easy to write the templates and hard to run them consistently when month-end gets busy. That is exactly the work an AI accounts receivable agent takes over: it reads your live invoices from QuickBooks, Xero, or NetSuite, sends the right reminder at the right time, escalates from email to SMS to a live AI phone call as an invoice ages, captures promises-to-pay, and applies the cash when it lands. The templates above stop being a to-do list and become a sequence that just runs.

The same discipline pays off on the other side of the ledger, too. If chasing what customers owe you is one half of clean cash flow, staying on top of what you owe suppliers is the other, and the same kind of automation now handles the bills you need to pay so nothing slips there either. Get both directions running on schedule and your cash position stops being a monthly surprise. To put your receivables reminders on autopilot, start with our collections automation software.