Overdue Invoice Email: 7 Templates From Friendly to Final
A good overdue invoice email is short, polite and specific. It states the invoice number, the amount still owed, the due date and how to pay, then asks for one clear thing. Send the first one a day or two after the due date, and get firmer on a fixed schedule.
Late payment is common enough that nobody should take it personally. Xero's small business data for the June 2026 quarter shows US small businesses waiting 29.3 days to be paid, and being paid 8.5 days late on average. Those are Xero customers, not a national sample, but they match what most owners already know. In our experience, many late invoices are forgotten or stuck in someone's process, and a clear email fixes them.
Below are seven templates you can copy, in the order you would send them. Change the words so they sound like you.
When to send each overdue invoice email
| Stage | Timing | Tone | Goal |
|---|---|---|---|
| 1. Before the due date | 3 days before | Helpful | Stop it going late |
| 2. Just late | 1 to 2 days after | Friendly | Assume it was missed |
| 3. A week late | 7 days after | Direct | Get a payment date |
| 4. Two weeks late | 14 days after | Firm | Find what is blocking it |
| 5. A month late | 30 days after | Serious | Escalate to a decision maker |
| 6. Final notice | 45 days after | Formal | Set a deadline and a next step |
| 7. Part paid | When it happens | Neutral | Confirm the balance |
These dates suit 30-day terms. If a client pays on a monthly run, match your emails to it, because a reminder the day after their payment run is wasted.
Template 1: a reminder before it is due
Subject: Invoice {number} is due on {date}
Hi {name},
A quick note that invoice {number} for {amount} is due on {date}. You can view and pay it here: {link}.
If anything needs correcting, let me know this week and I will sort it out.
Thanks, {your name}
This email gets invoices paid on time, and it brings disputes up early. A client who says "that should go to our accounts team" two days before the due date has saved you two weeks.
Template 2: one or two days late
Subject: Invoice {number} is now due
Hi {name},
I can't see a payment yet for invoice {number}, for {amount}, which was due on {date}. It may already be on its way, in which case please ignore this.
Here is the link again: {link}.
Thanks, {your name}
Template 3: a week late
Subject: Invoice {number}: 7 days overdue
Hi {name},
Invoice {number} for {amount} is now a week overdue. Could you let me know the date you expect to pay it?
I've attached a copy and the payment link is here: {link}.
Thank you, {your name}
Asking for a date works better than asking for payment. A date is a small promise, and it gives you something to follow up on.
Template 4: two weeks late
Subject: Overdue invoice {number}: is something holding this up?
Hi {name},
Invoice {number} for {amount} is 14 days overdue, and I haven't had a reply to my earlier emails.
If there's a problem with the work or the invoice, please tell me and I'll deal with it. If it's waiting on someone else, could you tell me who to speak to?
Otherwise, please send payment by {date}: {link}.
Thank you, {your name}
Template 5: a month late
Subject: Invoice {number} is 30 days overdue
Hi {name},
Invoice {number} for {amount} is now 30 days overdue. Our agreement says payment is due within {terms}, so I need to resolve this.
Please pay in full by {date}, or call me on {phone} this week so we can agree a plan. {If it applies: under our terms, further work is paused until the account is up to date.}
Regards, {your name}
Send this one to the person who signed the agreement as well as the accounts contact. Only mention a pause, interest or a late fee if your agreement allows it.
Template 6: final notice
Subject: Final notice: invoice {number}, payment required by {date}
Dear {name},
Despite our earlier reminders, invoice {number} for {amount}, due on {date}, remains unpaid.
Please pay in full by {deadline}. If we have not received payment or heard from you by then, we will {next step: refer the debt to a collection agency, or begin a small claims action}.
Payment link: {link}.
Regards, {your name}
Only write a next step you will really take. An empty threat teaches a client to ignore you, and for larger sums it is worth asking a lawyer before you send anything like this.
Template 7: after a part payment
Subject: Thank you for your payment on invoice {number}
Hi {name},
Thank you for your payment of {amount paid}. That leaves {balance} on invoice {number}.
Could you let me know when you expect to pay the balance? You can use the same link: {link}.
Thanks, {your name}
Always state the balance, never the original total. Chasing someone for the full amount after they have paid half is the fastest way to damage the relationship.
Mistakes that slow payment down
- Leaving out the link. Every step you add gives them a reason to put it off. Include the link in every email.
- Sending it to the wrong person. If you have had no reply twice, ask who handles payments.
- Writing a long story. Explanations give people something to reply to other than the invoice.
- Apologising for asking. You did the work. "Just checking in, so sorry to bother you" makes it easy to ignore.
- Getting angrier instead of clearer. Each email should change the deadline or the consequence, not the temperature.
- Going silent. QuickBooks' 2026 late payments report found 59% of small businesses say they have invoices 30 or more days overdue. That is a survey from a company selling payment tools, but the habit it points to is real: chase on a schedule.
Send it the same day each week
The simplest system is a weekly slot. Each Friday morning, open your list of unpaid invoices, oldest first, and send the next email for each one. Note the date a client promises and check it. Twenty minutes a week beats a monthly panic.
You can do this from a spreadsheet, though it helps if the list works itself out. In Pacten, receivables show who owes what and how late they are, and past-due invoices appear in your Needs you list without a spreadsheet to maintain.
From an unpaid invoice, the row menu has a Send reminder action that emails the invoice to your client. You can also send a written reminder from New document. All of these are by hand: there is no automatic schedule to set up, so you decide when to send. It also quotes the invoice's full amount, so for a part-paid invoice, use Template 7 instead and write the balance yourself. Pacten does not add late fees either, so any fee is one you agree and raise by hand as a debit note. Pacten sits alongside whatever your accountant uses, and the guide to creating and sending an invoice covers raising and sending one. See recording money in for how a payment updates the balance.
Frequently asked questions
- How do you politely write an overdue invoice email?
- State the invoice number, amount and due date, assume it was missed, include the payment link and ask for one thing. Keep it to three or four lines. Polite does not mean vague, so name the amount.
- How soon should I send an overdue invoice email?
- Send the first one a day or two after the due date. Many invoices are simply forgotten, and an early, friendly note usually settles them. Waiting weeks tells the client the date did not matter.
- What should the subject line be?
- Put the invoice number in it, plus the state of the invoice: "Invoice 1042 is now due" or "Invoice 1042: 7 days overdue". A clear subject can be searched for later and passed to an accounts team.
- Can I add a late fee to an overdue invoice?
- Only if your agreement with the client allows it, and the rules vary by place and by whether your client is a business or a person. Check your terms and ask a local adviser before you charge one.
- What do I do if a client ignores every email?
- Phone them, write to whoever signed the agreement, and pause further work if your terms allow it. After that, consider a collection agency or small claims, depending on the amount.