When an invoice is overdue, start by checking the facts. Has it reached the right person? Is it correct? Has payment already arrived under an unexpected reference? Is the customer waiting for a document, disputing an item or having difficulty paying?
A firm, factual message can preserve the relationship while making the next step clear.
Invoice [number] for [project] was due on [date], and our records show [amount] outstanding. Could you confirm the payment date, or let me know if there is an issue we need to resolve? I have attached the invoice for convenience.
Record the response
If the customer gives a payment date, record it and review it when due. If they report a problem, identify the disputed item and assign someone to resolve it. Pause automated reminders that would misrepresent the situation while a human handles the issue.
For a business customer, find out where the invoice sits in the approval process. “Accounts has it” may mean it is waiting for a project manager's confirmation. Ask what is missing and who can provide it.
Agree exceptions deliberately
If you consider a payment plan, assess the cash impact and document the amounts, dates and agreed terms through an appropriate process. Do not casually finance new work because an existing balance is unpaid.
Any late fees, collection action, work suspension or termination must be supported by the agreement and applicable rules. Get local advice before using those steps. Threatening a remedy you cannot use damages trust and can create a larger problem.
Learn without blaming every customer
Track causes of late payment. Wrong billing details call for better onboarding. Repeated scope disputes call for clearer approval. Delayed invoice issuance calls for an internal trigger. Genuine inability to pay may call for a different commercial decision before future work is accepted.
Keep private financial details limited to the people who need them. Team members preparing a delivery may need to know whether the booking is cleared, without needing the entire payment conversation.
A practical review: for each overdue balance, write one sentence stating what is known and the next dated action. If the sentence is only “chase again,” find out what you need to learn from the contact. Repeated reminders with no new information can consume time without bringing the invoice closer to resolution.