Templates

8 invoice reminder email templates you can actually use

Guides · 7 min read · Updated September 2026

Eight original templates covering every stage of a reminder sequence, from a friendly heads-up before the due date to a firm final notice — written to be genuinely usable, not filled with filler.

These templates are meant to be a starting point, not a script — swap in your own details, adjust the wording to sound like you, and skip any that don't fit a particular client. For guidance on how to choose tone and structure a reminder from scratch, see how to write an invoice reminder email.

Before the due date

A light, low-pressure heads-up — not a chase.

Send: 3–5 days before the due date

Subject: Invoice #[number] — due [date]

Hi [name], Just a quick heads-up that Invoice #[number] for [amount] is due on [date]. No action needed if it's already scheduled — just wanted to flag it in case it's slipped past. Let me know if you have any questions. Thanks, [your name]

Due today

Still friendly, but slightly more present-tense.

Send: on the due date

Subject: Invoice #[number] is due today

Hi [name], Just confirming Invoice #[number] for [amount] is due today. If it's already on its way, please disregard this — otherwise, let me know if there's anything you need from me to process it. Thanks, [your name]

3 days overdue

Direct, but still assumes good faith.

Send: 3 days after the due date

Subject: Following up on Invoice #[number] (3 days overdue)

Hi [name], Invoice #[number] for [amount] was due on [date] and I haven't seen a payment come through yet. Could you let me know when I should expect it, or flag if there's an issue I should know about? Thanks, [your name]

7 days overdue

More explicit about the timeline, still professional.

Send: 7 days after the due date

Subject: Invoice #[number] — now 7 days overdue

Hi [name], Invoice #[number] for [amount] was due on [date] and is now a week overdue. Could you confirm a payment date, or let me know if something's holding it up on your end? I appreciate you sorting this out. [your name]

14 days overdue

Firmer in tone, without being aggressive.

Send: 14 days after the due date

Subject: Invoice #[number] — 14 days overdue, please advise

Hi [name], Invoice #[number] for [amount], due on [date], is now two weeks overdue and I haven't had a response to my earlier follow-ups. I'd appreciate a payment date, or a call this week to discuss it if there's a problem. Please treat this as a priority. [your name]

Final notice

Formal and unambiguous, without threatening language.

Send: after earlier reminders have gone unanswered

Subject: Final notice: Invoice #[number]

Hi [name], This is a final reminder that Invoice #[number] for [amount], originally due on [date], remains unpaid despite previous follow-ups. Please arrange payment by [final date]. If there's a genuine issue preventing payment, I'm open to discussing it — please get in touch before that date so we can find a way forward. [your name]

Friendly client (softer version)

For a client with a strong track record who's simply running late.

Use in place of any overdue stage above, for trusted clients

Subject: Quick nudge on Invoice #[number]

Hi [name], I know things get busy — just flagging that Invoice #[number] for [amount] is a little overdue. No rush on my end if it's already in progress, just wanted to make sure it hadn't been missed. Thanks as always, [your name]

Firm professional reminder

For a formal client relationship or a larger invoice, where a more corporate tone fits better than the standard sequence.

Use for formal accounts or larger invoices

Subject: Overdue payment — Invoice #[number]

Dear [name], I am writing regarding Invoice #[number], for [amount], which was due for payment on [date] and remains outstanding. Please arrange payment at your earliest convenience, or contact me if there is a query I can assist with. I look forward to your response. Regards, [your name]

Common template mistakes to avoid

Leaving placeholders unreplaced. An email that still says "[amount]" reads as careless, and undermines the professionalism the template is meant to project.
Using the firm template too early. Sending the "final notice" wording as a first reminder skips the escalation that makes a genuine final notice feel serious when it matters.
Keeping the same subject line across every stage. A subject that doesn't change makes it hard for a busy recipient to tell how urgent a given email actually is at a glance.
Copying a template word-for-word every time. A little variation — a name, a specific detail about the invoice — keeps reminders from reading as obviously automated, even when they are.

Making these your own

Keep the structure — invoice details, a clear ask, and a tone matched to the stage — and adjust the wording until it sounds like you rather than a form letter. Once you're happy with a set, they work just as well as the basis for an automated sequence as they do sent one at a time.

FAQ

Using these templates, answered

Yes — each one is written to work with minimal editing. Just replace the bracketed placeholders (invoice number, amount, dates, names) with your own details.

Start with the "before due date" or "due today" template — a light-touch reminder before anything is actually late sets a professional tone and catches simple oversights early.

As a rough guide: friendly up to the due date, professional and direct once it's a few days to a week overdue, and firmer from two weeks overdue onward. Adjust based on the client relationship and how they've responded so far.

It's often worth it. A client with a long, reliable payment history can usually be given a softer, more personal version — the "friendly client" template — even a little later than you'd otherwise send it.

Yes — once you're happy with the wording, they translate directly into an automated reminder sequence, so the right one goes out at the right stage without you sending it manually each time. See how to automate invoice reminders.

Send these automatically, in your own words

Duevaro's AI adapts reminders like these to your invoice and your tone. Start your 14-day free trial.

Read the full writing guide · Automatic invoice reminders · Contact us