Guide · 7 min read

How to follow up on an unpaid invoice

Most late invoices aren't refused, they're forgotten. A short, regular follow-up gets most of them paid. Here is a schedule and the messages to send.

Updated · by the Kanvo team

First, check the invoice itself

Many invoices are paid late because something is missing: a due date, a purchase order number, the right company name, or the bank details. Before you chase, check the invoice has a clear due date, the total and how to pay. The free invoice generator covers all of these.

A follow-up schedule

WhenWhat to send
3 days before the due dateA friendly reminder (optional, but it works)
On the due date"Due today" reminder
7 days lateA firmer reminder that restates the amount and date
14 days lateA call or voice message, plus a written follow-up
30 days lateA final notice stating what happens next

Templates

Before or on the due date

Hi [name], a quick reminder that invoice [number] for [amount] is due on [date]. The details and payment link are attached. Thanks!

7 days late

Hi [name], invoice [number] for [amount] was due on [date] and I haven't received payment yet. Could you let me know when it will be paid? I've attached it again in case it got lost.

14 days late

Hi [name], I'm following up on invoice [number] for [amount], now two weeks overdue. Is anything holding it up on your side, like a missing PO number? I'd like to get this settled this week.

30 days late

Hi [name], invoice [number] for [amount] is now 30 days overdue. Please arrange payment by [date]. If I don't hear back by then, I'll pause any ongoing work and [next step you're prepared to take].

Only state a next step you will actually take, and check the rules where you work before mentioning late fees or legal action.

Tips that make a difference

  • Message the right person. If someone else pays, ask who, and copy them in.
  • Keep it short and specific. Amount, invoice number, due date, how to pay.
  • Use the channel they answer. For many small clients, WhatsApp gets a faster reply than email.
  • Stay friendly. You may want to work with them again.

Make the next invoice get paid on time

  • Take a deposit before you start (see how much deposit to ask for).
  • Use short, specific terms: a real due date, not just "Net 30".
  • Invoice the day the work is delivered, while the client is happy with it.

Kanvo shows every overdue invoice on your home screen and turns a reminder into two taps by WhatsApp or email, with the amount and invoice number already filled in.

Free tool: Make a clean invoice and download it as a PDF.

Open the free tool

Questions

How long should I wait before following up on an unpaid invoice?

Send a reminder on the due date, a firmer one about a week later, and call after two weeks. Waiting a month before the first follow-up makes late payment more likely.

How do I politely ask for payment?

Keep it short and specific: the invoice number, the amount, the due date and how to pay. Ask whether anything is holding it up, such as a missing purchase order number.

Can I charge a late fee?

Often yes, if it was in your terms before the work started, but the rules differ by country. Check what applies where you and your client are.

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