Overdue Invoice Email Template (First, Second, and Formal Notice)

An overdue invoice does not always mean the client has decided not to pay. Often the invoice never reached accounts payable, a payment run was missed, or the email sat unopened. The overdue invoice email template you send should assume that first, then get firmer if you still have no payment date.

This page is only about invoices that are already past due. For a heads-up before the due date and a full follow-up schedule, see how to follow up on an unpaid invoice. For situation-specific notes (accounts payable, missed promises, partial payments), use the payment reminder email templates. If a formal notice still gets silence, use what to do when a client doesn't pay.

If you want a draft shaped by how many days late the invoice is, Payment Watch's free payment reminder email generator will write one you can copy, with no signup. The templates below are ready to paste as they are.

When to send each overdue email

A simple pattern is enough:

• A few days late: a first overdue note. Assume it was missed. Resend the invoice and the payment link.
• About a week late, or after no reply to the first note: a second overdue email that asks for a specific payment date.
• About two weeks late, or after two ignored follow-ups: a formal overdue notice with a deadline and a next step you will actually take.
• If work is still in progress: say clearly, in writing, that new work is paused until the invoice is paid.

Do not jump to the formal notice on day two, and do not send five "just checking in" emails instead of one clear notice. Match the template to the stage, then stop adding extra messages in between.

What every overdue invoice email should include

Every version, including the first, should have:

1. The invoice number
2. The exact amount still due
3. The original due date and how many days overdue it is
4. A payment link or payment details
5. One request (pay now, confirm a date, or tell you what is wrong)
6. A way for them to say the invoice is incorrect, so a real dispute can surface

Write in the same thread if you can, so the history travels with the message. If you have only been emailing a project contact at a company, copy accounts payable on the second email.

Template 1: First overdue invoice email

Send this a few days after the due date, when you have not yet had a useful reply. The tone is matter-of-fact, not stern.

Subject: Invoice [INV-3180] for [amount] is now past due

Hi [Name],

Invoice [INV-3180] for [amount] was due on [due date] and is now [3] days past due. I wanted to make sure it reached you and that nothing on the invoice needs to be corrected.

You can view and pay it here: [payment link]

The invoice is attached again for convenience. If payment has already been sent, please ignore this and, if it is easy, forward the payment reference so I can match it. If this should go to a different billing contact or needs a PO, reply and I will update it today.

Thanks, [Your name]

Template 2: Second overdue email — ask for a date

Use this about a week after the due date, or a few days after the first overdue note has gone unanswered. The point of this email is to get a date, not another soft acknowledgment.

Subject: Please confirm a payment date for overdue invoice [INV-3180]

Hi [Name],

I am following up on invoice [INV-3180] for [amount], originally due [due date] and now [7] days overdue. I emailed on [date of first overdue note] and have not received payment or a date.

Please confirm one of the following by [date, 3 business days out]:

• The date payment will be made, or
• What needs to change on the invoice if it is being held

Payment link: [payment link]

If I do not hear back by then, I will send a formal notice on this invoice. If we have other work open, I will also need to pause it until this balance is cleared.

Thanks, [Your name]

If they reply with a date, send one short confirmation ("Thanks, I will look for payment on [date]") and wait until that date before you write again.

Template 3: Formal overdue notice

Use this when earlier overdue emails have produced neither payment nor a credible date. Keep it short. Only name a next step you will follow through on.

Subject: Formal notice: invoice [INV-3180] ([amount]) is [14] days overdue

Hi [Name],

This is formal notice that invoice [INV-3180] for [amount], due [due date], remains unpaid and is now [14] days overdue. I followed up on [date] and [date] without receiving payment or a payment date.

Please arrange payment in full by [date, 7 days out]. If the balance is not received by that date, I will [pause all remaining work / apply the late fee stated in our agreement / send a demand letter]. I would prefer to resolve this directly.

Pay here: [payment link]

If payment has been made in the last few days, please send confirmation so I can close the invoice.

[Your name] [Business name]

Do not mention collections, a court, or a late fee unless that step is real — already in your agreement, or a step you are prepared to take. An empty threat is worse than a quiet deadline.

If this is a UK business-to-business invoice and you are considering statutory interest or recovery costs, read the current official guidance on GOV.UK before you mention them. That is not legal advice, and those rights do not apply to every invoice. Outside the UK, only refer to fees that are already in your terms or clearly allowed where you work.

Template 4: Pause work until the overdue invoice is paid

Send this when you still have work in progress, or when the client has asked for the next round of files. It can go on its own, or as a short addition after the formal notice.

Subject: Pausing work on [project name] until invoice [INV-3180] is paid

Hi [Name],

I still have invoice [INV-3180] for [amount] outstanding, originally due [due date] and now [X] days overdue.

I need to pause further work on [project name] until that invoice is settled. I will pick the work back up as soon as payment is received. The invoice is here if you want to take care of it today: [payment link]

If there is a problem with the invoice, tell me what needs to change and I will fix it. Otherwise I will wait to hear that payment has been sent.

Thanks, [Your name]

This is a boundary, not a punishment. Continuing to deliver while an overdue invoice sits unpaid usually makes the balance larger and the conversation harder.

Mistakes that weaken an overdue invoice email

Leaving out the amount or the due date. "Following up on my last email" forces the client to go hunting. Put the invoice number, amount, and days overdue in the first two lines and in the subject.

Apologizing for the follow-up. You do not need "sorry to bother you" in an overdue invoice email. A brief, factual note is more professional.

Stacking three asks in one message. Ask for payment, or a date, or a correction. One of those is enough.

Changing the story each time. If your first email said the invoice was due on the 10th, the formal notice should use the same date and amount. Inconsistencies give people a reason to delay.

Sending the formal notice too early, or never sending it at all. The first overdue email should still leave room for a simple mistake. The formal notice should come after you have given that room, and then you should mean the deadline.

After you hit send

Log the date, the template you used, and any reply. If they promise a date, put a reminder on your calendar for the following morning. If the formal-notice deadline passes with silence, stop sending variations of the same email. That is the moment to call, to send a letter that creates a delivery record, or to decide whether the amount is worth a claim — the steps in what to do when a client doesn't pay.

If you would rather not draft the first and second overdue notes from a blank page each time, you can start from the payment reminder email generator and then add the payment date, the pause-work line, or the formal deadline yourself.

A note on Payment Watch

Payment Watch can send the regular overdue sequence for you: a gentle follow-up a few days late, a firmer reminder at a week, and a final notice at two weeks, in your name, from Stripe, QuickBooks, or invoices you add yourself. It stops when the invoice is marked paid, and you can pause a client if you are already on the phone. It is free for 3 open invoices, with no card required to start.

It is not a collections tool, and it will not send a legal demand letter for you. Use the formal notice and pause-work templates above when you have reached that point. For the earlier overdue emails, having them go out on a schedule is usually what keeps a three-day delay from becoming a thirty-day one.