Overdue invoice email templates: 5 polite reminders that get you paid

An invoice is past due and you have heard nothing. It is an awkward moment: you want your money, and you also want to keep the customer.

Most late payments are not bad faith. The invoice went to the wrong person, got buried in an inbox, or is waiting for someone’s approval. A short, clear email fixes most of them. Below are five templates to copy, with the right moment to send each one.

Before you send anything

Take two minutes to check your own side first. It saves embarrassment.

• Is it really overdue? Check the due date against the payment terms on the invoice. Net 30 means 30 days from the invoice date, not from the delivery.
• Did it go to the right address? Many companies have a separate accounts payable email.
• Has the payment already arrived? Look at your bank account and your payment processor before you write.
• Is the invoice complete? A missing purchase order number or tax detail is a common reason an invoice is quietly set aside. Compare it with our invoice template.

When to send each reminder

A fixed schedule takes the emotion out of it. You are not chasing anyone: you are following your process.

When	Email	Tone
3 days before the due date	1. Friendly heads-up	Helpful
1 to 3 days after the due date	2. First reminder	Polite, assumes an oversight
7 to 10 days overdue	3. Second reminder	Direct, asks for a date
21 to 30 days overdue	4. Firm reminder	Firm, mentions consequences
45 to 60 days overdue	5. Final notice	Formal, states the next step

Adjust the gaps to your business. If you sell on Net 15, tighten them. If your customer is a large company that pays on fixed dates, loosen them.

What every reminder should contain

• The invoice number, the amount and the due date, in the first lines.
• The invoice attached again, as a PDF. Never make the customer search for it.
• How to pay: a payment link or your bank details.
• One clear request: pay, or tell me when you will pay.
• A way to reach you if something is wrong with the invoice.

Keep each email short enough to read on a phone without scrolling much.

Template 1: friendly heads-up, before the due date

Subject: Invoice [number] is due on [date]

Hi [name],

A quick note to let you know that invoice [number] for [amount] is due on [date]. I have attached a copy for convenience.

You can pay by [payment method or link]. If you need anything from me to process it, such as a purchase order number, just let me know.

Thank you, [Your name]

This one is optional, but it works well with customers who have paid late before. It also surfaces problems while there is still time to fix them.

Template 2: first reminder, just after the due date

Subject: Reminder: invoice [number] was due on [date]

Hi [name],

I hope you are well. Our records show that invoice [number] for [amount] was due on [date] and has not been paid yet. It may simply have been missed, so I am attaching it again.

You can pay by [payment method or link]. If the payment is already on its way, please ignore this message.

Thank you, [Your name]

Assume an oversight. It usually is one, and it lets the customer fix it without losing face.

Template 3: second reminder, 7 to 10 days overdue

Subject: Invoice [number] is now [X] days overdue

Hi [name],

I am following up on invoice [number] for [amount], which was due on [date] and is now [X] days overdue. A copy is attached.

Could you let me know when we can expect the payment? If there is a problem with the invoice or the order, tell me and I will sort it out quickly.

Thank you, [Your name]

The key line is the question. Asking for a date gets an answer more often than asking for payment “as soon as possible”.

Template 4: firm reminder, 21 to 30 days overdue

Subject: Overdue: invoice [number], [amount], due [date]

Hi [name],

Invoice [number] for [amount] is now [X] days overdue, and I have not had a reply to my previous messages of [dates].

Please arrange payment by [specific date, about 7 days away]. As set out in our terms, [a late fee of X applies to overdue invoices / new orders will be on hold until the account is settled].

If you cannot pay the full amount now, call me on [phone] so we can agree on a payment plan.

Regards, [Your name]

Only mention a late fee if it was in the terms the customer agreed to before the sale. Offering a payment plan is not weakness: part of the money now is better than none of it later.

Template 5: final notice, 45 to 60 days overdue

Subject: Final notice: invoice [number], [amount]

Dear [name],

This is a final notice for invoice [number] for [amount], due on [date] and now [X] days overdue. We have sent reminders on [dates] without receiving payment or a reply.

If payment is not received by [specific date], we will [suspend your account / pass the debt to a collection agency / start a formal recovery process].

We would much prefer to settle this directly. You can pay by [payment method or link] or contact me on [phone] today.

Regards, [Your name]

Only write a consequence you are really prepared to carry out. The rules on late fees, interest and debt collection differ from one place to another, so check what applies to you, or ask a professional, before you take the formal step.

Subject lines that get opened

A good subject line contains the invoice number and says what the email is about. It should still make sense in a crowded inbox.

• Invoice [number] is due on [date]
• Reminder: invoice [number] was due on [date]
• Invoice [number] is now 10 days overdue
• Overdue: invoice [number], [amount]
• Final notice: invoice [number]

Avoid vague subjects such as “Following up” or “Quick question”, and avoid capital letters and exclamation marks. They look like spam.

If the emails get no answer

• Pick up the phone. A two-minute call often does what four emails did not. Ask who handles payments and when the next payment run is.
• Write to someone else. Your contact may have left. Try the accounts payable address or the owner.
• Send a statement. If several invoices are open, one statement listing them all is clearer than several emails.
• Stop new work. Put new orders on hold until the account is settled, and say so plainly.
• Decide what the debt is worth. For a small amount, a collection agency or a small claims court can cost more in time than you recover. For a large one, get advice.

How to get fewer late payments

Chasing is the cure. Prevention is cheaper.

• Send the invoice the same day you ship or finish the work. Every day you wait is added to the delay.
• Put the due date in plain words: “Due on March 15”, not only “Net 30”.
• Offer an easy way to pay. A payment link on the invoice removes the most common excuse.
• Ask for a deposit on large or first-time orders.
• Automate the reminders. Most invoicing software can send reminders on a schedule and show you which invoices are overdue. Check which plan includes it: see our comparison of the best invoicing software for small business.
• Review open invoices every month, as part of your monthly bookkeeping checklist.

Common questions

How soon can I send a reminder for an overdue invoice?

The day after the due date is fine. A polite first reminder one to three days late is normal business practice, and nobody reasonable is offended by it.

How do I ask for payment without sounding rude?

State the facts, attach the invoice, and assume it was an oversight. “Our records show that invoice 1042 has not been paid yet” is neutral. Avoid blame (“you failed to pay”) and avoid apologizing for asking (“sorry to bother you”).

Can I charge a late fee?

Usually only if the fee was part of the terms the customer accepted before the sale, and within the limits set where you do business. If it was not in your terms, add it for future invoices rather than this one.

Key takeaways

• Check your own side first: due date, recipient, bank account.
• Follow a fixed schedule of five emails, from friendly to final.
• Every reminder repeats the invoice number, amount and due date, and attaches the invoice.
• Ask for a payment date, not just for payment.
• Automatic reminders and same-day invoicing prevent most of the problem.