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Payment Reminder Email Templates: 7 Polite Overdue Invoice Emails (Before, On and After the Due Date)

Updated 2026-10-26 · AI Agent Starter Kit

You did the work, sent the invoice, and the due date came and went. Now you have to ask for your money, and it feels awkward. Most owners either wait too long because they don't want to seem pushy, or send one annoyed email and then nothing.

The fix is a simple, polite, pre-written sequence. When the words are ready and the dates are planned, chasing an invoice stops being a mood and becomes a routine. This guide gives you a reminder schedule, subject lines, seven templates for each stage, and the few things you should never put in a payment email.

Why invoices go unpaid (it's usually not personal)

Most late payments are not refusals. The invoice slid down a busy inbox, went to someone who doesn't pay the bills, landed in spam, or raised a small question the customer hasn't asked yet. Sometimes cash is tight on their side and they intend to pay, just not yet. That is why the first reminders should assume good faith. Your tone can firm up later, but starting friendly gets most invoices paid without any tension.

Set it up so you chase less

A few habits before the invoice goes out cut down the chasing a lot:

A simple payment reminder schedule

Here is a schedule that is polite but doesn't let anything drift. Adjust the days to match your terms.

When Email Tone
3 days before due Friendly heads-up Helpful
Due date Due today Neutral
3 days overdue First overdue reminder Friendly, assume an oversight
14 days overdue Second reminder Direct, ask for a date
30 days overdue Firm reminder Firm, mention terms
45 days or more Final notice Firm and clear about next steps
Any time they reply "can't pay yet" Payment plan Practical

Stop the sequence the moment they pay or reply. Nothing damages a relationship faster than a stern reminder that arrives after the money did.

Subject lines that get opened

Keep them plain, include the invoice number and make them easy to search:

7 payment reminder email templates

Replace the brackets. Check every amount, date and invoice number yourself before sending. A wrong number in a payment email is worse than a late one.

1. Friendly reminder 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]. Here's the payment link in case it's handy: [PAYMENT LINK].

Thanks again for the work on [JOB]. Let me know if you have any questions.

[Your name]

2. Due today

Subject: Invoice [NUMBER] due today

Hi [Name], a reminder that invoice [NUMBER] for [AMOUNT] is due today. You can pay here: [PAYMENT LINK]. If it's already on its way, thank you and please ignore this.

The "please ignore this" line matters. It tells a customer who already paid that you are not accusing them.

3. First overdue reminder (about 3 days late)

Subject: Reminder: invoice [NUMBER] for [JOB]

Hi [Name],

I hope things are going well. I noticed invoice [NUMBER] for [AMOUNT] was due on [DATE] and I haven't seen the payment come through yet. It may well have slipped through the cracks, so here's the link again: [PAYMENT LINK].

If anything on the invoice looks off, or it should go to someone else, just let me know and I'll sort it out.

[Your name]

Offering to fix the invoice or redirect it handles two of the most common reasons for late payment in one line.

4. Second reminder (about 14 days late)

Subject: Invoice [NUMBER] is now 14 days overdue

Hi [Name], following up on invoice [NUMBER] for [AMOUNT], which was due on [DATE]. Could you let me know when you expect to pay it? A date is all I need for now. The link is here: [PAYMENT LINK].

A date is easier to answer than "please pay," and gives you something specific to follow up on.

5. Firm reminder (about 30 days late)

Subject: Invoice [NUMBER]: 30 days overdue

Hi [Name],

Invoice [NUMBER] for [AMOUNT] is now 30 days past its due date of [DATE]. I've sent reminders on [DATE] and [DATE]. Under the terms we agreed, [LATE FEE TERMS, only if they were in your quote or invoice].

Please pay by [DATE] using [PAYMENT LINK], or reply today if there's a problem so we can find a solution.

[Your name]

Only mention a late fee if it was in your agreed terms.

6. Final notice

Subject: Final notice: invoice [NUMBER]

Hi [Name],

This is my final reminder about invoice [NUMBER] for [AMOUNT], due [DATE]. I'd like to settle this directly with you. If I don't receive payment or hear from you by [DATE], I'll [NEXT STEP: pause further work / pass it to a collections service / take the next step allowed under our agreement].

You can pay here: [PAYMENT LINK]. If something has changed on your side, call me at [PHONE] and we'll work it out.

[Your name]

Only name a next step you will actually take. Empty threats teach customers that your deadlines don't mean anything. If the amount is large, a short chat with an accountant or lawyer about your options is worth it before you send this one.

7. Offering a payment plan

Subject: Re: invoice [NUMBER]

Hi [Name], thanks for letting me know, I appreciate you being upfront. I can split the [AMOUNT] into [NUMBER] payments of [AMOUNT EACH], due on [DATES]. If that works, reply "yes" and I'll send updated payment links for each one.

A customer who says "I can't pay right now" is still a customer who wants to pay. A clear plan usually gets you more, sooner, than a standoff.

What not to say in a payment reminder

When to pick up the phone

Email is fine for the first three reminders. After 14 days, or for any large amount, a short call is often faster. Keep it friendly: "I'm calling about invoice [NUMBER]. Is there anything holding it up?" Then send a one-line email confirming whatever date they gave you.

Keep a simple overdue list

You can't chase what you can't see. Once a week, list every unpaid invoice with the customer, amount, due date, days overdue and the last reminder sent. That list belongs in your weekly review, and the total overdue is one of the first lines in a simple cash flow forecast, because money you are owed is not money you can spend yet.

Let AI draft the reminder, you send it

AI is good at turning "invoice 1042, $850, due the 3rd, second reminder" into a polite email. The safe setup:

Writing them one at a time for now? The free AI email reply prompt generator has a "late payment" type that builds a safe ChatGPT, Claude or Gemini prompt with those rules built in. For more ready-made wording, see the customer email reply templates and these ChatGPT prompts for business emails.

Skip the busywork

To be clear about what our kits do: they don't send invoices or chase payments on their own, and money emails always come to you by design. What they do is take the rest of the inbox off your plate so you have time for the emails that pay you.

The Inbox + Leads Starter Pair runs in n8n. Inbox Chief of Staff sorts every email (invoices and payment confirmations get their own label), drafts replies to customer questions in your voice, routes anything about money movement or bank details straight to you with no AI draft, and sends you a 6 PM digest of what still needs you. Speed-to-Lead logs every new inquiry to a Google Sheet, drafts a first reply within about 5 minutes, and drafts Day 2, 5 and 10 follow-ups that stop when the customer answers. Nothing sends without you. Get the bundle

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