Following up on unpaid invoices

TL;DR:

• Most late invoices are forgotten, not refused, so the first message should be short, friendly and complete.

• Every reminder repeats the invoice details so the reader never has to look anything up.

• Follow a fixed ladder: a friendly note, a firmer note, a phone call, then a formal step, each with a date.

You sent the work, you sent the invoice, and the due date has passed with no payment. Asking for money you are owed feels awkward, so many people wait too long or send something that sounds angry. A better habit is a simple ladder of messages, each clear, polite and easy to act on.

When to start chasing

Your clock starts at the due date on the invoice, not the day you sent it. If the invoice said it was due on October 15, then October 16 is the first day it is overdue. Check first that you actually have the right to chase: confirm that the client received the invoice, that it went to the right address, and that no one told you about a dispute.

Gather the facts before you write

A reminder that makes the reader hunt for the invoice does not get paid. Collect these in one place so you can paste them into every message:

• The invoice number, the date it was issued and the due date.

• The amount owed, in the currency on the invoice, and whether any part has been paid.

• What the invoice is for, in a few words.

• How to pay: the same bank details or payment link that were on the invoice.

• The invoice itself as an attachment, so it is one click away.

Never put anything in a reminder you have not double checked. Quoting the wrong amount gives the client an easy reason to delay.

Track overdue invoices in one sheet

A small tracking sheet keeps you from forgetting who has been chased. Use the columns Invoice, Client, Amount, Due date, Days overdue, Status and Last contact. In the Days overdue column enter a formula that works in both Excel and Google Sheets:

=MAX(0, TODAY() - D2)

D2 holds the due date as a real date, not text. The MAX keeps invoices that are not yet due at 0 instead of showing a negative number. Sort by this column each week and the invoices that need action rise to the top.

The ladder: tone changes, facts do not

1. A friendly check, a few days after the due date: Assume it slipped through. Ask if the invoice arrived and whether they need anything from you to pay.

2. A clear reminder, about two weeks overdue: Still polite, now more specific: the invoice number, the amount, the date it was due and how to pay. Ask for a payment date.

3. A call or a firmer email, around a month overdue: Ask directly whether there is a problem with the invoice or the work. A conversation often surfaces the real reason. Write down what was agreed.

4. A formal notice: If you still hear nothing, send a written notice that states the amount, the original terms and a final date. Before you take any step that has legal or fee consequences, such as adding late fees or involving a collection agency, check your contract and check with a professional, because the rules differ by place.

Those timings are a sensible default, not a rule. Adjust them to your agreement and your relationship with the client, and write your chosen ladder down so you apply it the same way to everyone.

Worked example: a friendly reminder after 15 days

Say you sent invoice 1047 for 1,850.00 on October 1 with payment due on October 15. By October 30 it is Oct 15 + 15 days = Oct 30, so the invoice is 15 days overdue and your sheet shows 15 in the Days overdue column. The client has not replied to anything. This is the moment for the clear but friendly reminder.

Subject: Invoice 1047 for 1,850.00, due October 15

Hi Priya,

A quick note about invoice 1047 for the website update, issued
October 1. It was due on October 15, and I don't see the payment
on my side yet, so it is now 15 days past due.

The invoice is attached again for convenience. The amount is
1,850.00, and the payment details are the same as on the invoice.

If it has already gone out, thank you, and please ignore this.
If something is holding it up, such as a missing PO number or a
change in who approves it, let me know and I will sort it out.

Could you tell me by Friday when I can expect it?

Thanks,
Sam

Notice what this message does. The subject line holds the invoice number, amount and due date, so it can be found later. The body gives the three facts, offers a way out without blame (maybe it was paid, maybe there is a snag) and asks for one specific thing: a date. Priya and Sam are invented names for the example.

After sending, set the Status in your sheet to Reminder 2 sent, write today's date under Last contact and add a calendar reminder for the date you asked for. If that date passes in silence, you move to the next rung.

Getting the tone right

• Write as a colleague, not a bill collector. "Could you let me know when" works better than "You must pay immediately".

• Keep each email to one request. A single clear question gets a single clear answer.

• Stay factual when you get firmer. Add dates and amounts, not adjectives.

• Reply to the same email thread so the history stays together.

Mistakes to avoid

• Waiting months and then sending an angry message. A routine prevents this.

• Sending a reminder without the invoice attached.

• Mentioning consequences you do not intend or are not entitled to carry out.

• Chasing an invoice that was already paid. Check your bank first.

• Letting a verbal promise replace a date in writing.

Doing it faster

Keep your three reminder messages as saved templates, so a chase takes two minutes: paste, fill in four details, send. DuckyHelper can also read an email draft on your screen and talk through whether the tone sounds right before you send it; sending stays your decision.

Frequently asked questions

Should I charge a late fee?

Only if your agreement or terms already say so and the rules where you work allow it. Check the contract, and check with a professional before you add fees.

What if the client says they never got the invoice?

Resend it right away to the correct address, and agree on a new payment date in writing. Note that the original due date and the date it was actually received may need discussing.