How to chase a late invoice without losing the client

Most late invoices are not refusals. They are an invoice sitting in the wrong inbox, a person who pays suppliers on the last Friday of the month, or an accounts system that never received it. Almost every chase that works starts from that assumption and only stops assuming it when the evidence changes.

Before the first chase

• Check it was actually sent, to the right address, with the invoice attached — this is the cause more often than anyone admits.
• Check your own terms: what did you agree, and is it genuinely late yet?
• Check the invoice has everything their system needs — a purchase order number, a reference, the right company name. Missing details are the commonest reason a payment silently never gets scheduled.

The four messages

1. 1Day one late: a short, friendly nudge. "Just checking this reached you — invoice 104, £480, was due Friday. Attaching it again in case." No apology, no accusation.
2. 2One week late: same tone, but ask a question that needs an answer. "Can you let me know when it's scheduled for payment?" A question is harder to ignore than a reminder.
3. 3Two weeks late: pick up the phone, then follow with an email confirming what was said and the date agreed. Almost everything gets resolved at this step, and almost nobody does it.
4. 4Three to four weeks: the formal one. The invoice, the dates, the amount, a clear deadline, and what happens next — late fees, work paused, or a formal demand.

Space them out and keep every one of them in writing. The pattern that gets paid is regular, unemotional and impossible to lose track of; the pattern that does not is one furious email six weeks later.

What actually moves money

• Talking to the person who processes payments rather than the person who hired you. They are rarely the same person and only one of them can pay you.
• Asking for a date instead of asking for payment. A date is a commitment you can follow up on.
• Making paying easy — the bank details in the email itself, or a payment link.
• Pausing work, where there is ongoing work. Said calmly and in advance, it is the most effective step there is.

Stopping the next one

Put the terms on the invoice in plain words — when it is due, how to pay, what happens if it is late. Take a deposit on new clients and on anything large. Invoice the day the work finishes rather than at month end, because the clock only starts when the invoice exists.

Then keep one list of what is owed, by whom, and since when. Chasing works when it is a two-minute weekly job off a list, and it stops working when it depends on remembering.

Where a client goes properly silent, most countries give small businesses a route — statutory late-payment interest, a formal letter before action, a small claims process. Look up the rules where you are before you need them, once, and keep the note.