An invoice goes out on the first of the month with 14 days to pay. On day 15 nothing has arrived. The owner is busy, the customer is a good one, and nobody wants to sound pushy. So the invoice sits for another two weeks, then another, and by the time someone writes, the message is awkward and the tone is cold.
This article is for the owner or finance-minded person in a small company who sends invoices and wants a calm, repeatable way to follow them up. It is a routine, not a collections strategy. For the wider picture of how payment delays affect cash, see our article on a late customer payments collection routine.
Why a routine beats good intentions
Late payment is usually ordinary. The invoice went to the wrong person, waits for an approval, or was simply forgotten. A routine helps for three reasons:
- Timing is fixed. You do not have to decide each time whether it is "too soon" to write.
- Tone is neutral. The same short wording goes to every customer, so nobody is singled out.
- Nothing depends on memory. Whoever is in the office that day can follow the steps.
Step 0: a note before the due date
The cheapest reminder is the one that is not a reminder. Three to five days before the due date, send a short message:
Hello Anna, a quick note that invoice 2026-114 for 1,200 EUR is due on 15 November. The payment details are on the invoice. If it needs a purchase order number or has to go to a different person, tell me and I will resend it today.
This catches wrong addresses, missing order numbers and approvals that have not started. It also shows that you keep track, which many customers quietly respect. If you already have a clear invoice approval process on your side, you will know how much these small gaps cost; our article on invoice approval in a small company describes the customer's side of the same problem.
Step 1: the first reminder (2 to 3 days after the due date)
Keep it short, factual and friendly. Include the invoice number, amount, due date and how to pay.
Hello Anna, I do not see payment for invoice 2026-114 (1,200 EUR, due 15 November) yet. I have attached a copy in case the original did not reach the right person. If it has already been paid, please ignore this note and let me know the date. Thank you.
Two details matter. Attach the invoice again, so the reader does not have to search for it. And give an easy way out ("already paid, please ignore"), so the message cannot feel like an accusation.
Step 2: the second reminder (about 7 days after the first)
If there is no reply, write again with the same facts and one new element: a clear question.
Hello Anna, I am following up on invoice 2026-114, now 10 days past due. Could you tell me when we can expect payment, or whether something is holding it up on your side? If it helps, I can call you this week to sort it out.
Asking for a date is the key change. A date gives you something concrete to record and check. "Soon" does not.
Step 3: the phone call (about 7 days after the second reminder)
By now two emails have gone unanswered or have produced a vague promise. Pick up the phone, or arrange a short call. Say it plainly:
- You are calling about invoice 2026-114, which is three weeks past due.
- You would like to know if there is a problem with the invoice or the work.
- You would like an agreed payment date, and you will confirm it in writing straight after the call.
Then send a two-line confirmation: "Thank you for the call. As agreed, payment of 1,200 EUR will arrive by 28 November." A confirmed date is much easier to follow up than a conversation nobody wrote down.
Listen as well as ask. Sometimes the call reveals a real dispute, such as a deliverable the customer thinks is incomplete. That is a different problem, and chasing it as a late payment will make it worse. Pass it to whoever owns the customer relationship and pause the reminders until it is resolved.
The escalation point
Decide before the first invoice goes out when the matter leaves the routine. A simple rule for a small company:
- Date missed after a confirmed promise, or no answer to the call and the second reminder - the invoice goes to the owner, who contacts the customer's decision maker directly.
- After that, the owner decides on the next step: a formal written notice, a payment plan, stopping new work until the account is settled, or involving a lawyer or collection agency.
The point of writing this down is not to be harsh. It is to avoid the situation where each late invoice is a new debate about what to do. Check your contract terms and local rules on late-payment interest and fees before you mention them to a customer; they differ by country and by agreement.
What to record
Add a small log to every open invoice. A spreadsheet column or a note in your accounting tool is enough:
- date and channel of each contact (email, call)
- who you spoke to
- the payment date they promised
- the current step: before due, reminder 1, reminder 2, call, escalated
When someone else has to take over, they should be able to read the log and continue without asking you what happened. If you already keep quoting and sales follow-ups in a routine, as described in our article on quoting and follow-up routine for a small sales team, you can use the same habits here.
Common mistakes
- Waiting for a "good moment". The longer the delay, the harder the first message becomes.
- Changing the tone for favourites. Good customers also pay late; the routine protects the relationship because it is the same for everyone.
- Threatening in the first message. Save formal language for the escalation point.
- Accepting "soon". Always ask for a date.
- Forgetting to close the loop. When payment arrives, send a short thank-you and mark the invoice as paid in the log.
A short plan for this week
- List your unpaid invoices and mark each with its current step.
- Copy the four message templates above into a document and adjust the wording to your voice.
- Write down the escalation rule and who owns it.
- Add the contact log to your invoice list.
- Schedule a weekly 15-minute slot to send the reminders that are due.
You do not need special software for this. A few honest sentences, fixed timing and one agreed point of escalation will turn an uncomfortable chore into a routine your team can run without stress.
Sources
- Practical guidance based on common small-business accounts-receivable practice, offered as a planning aid. The timings, amounts and wording are illustrations to adapt to your own contracts, customers and local rules. The example invoice, names and figures are invented. No client results or performance figures are claimed in this article.
