What to do when a client pays late — and what to say

The payment was due on the 15th. It’s the 25th. You’ve said nothing.

That gap — the silence between due date and follow-up — is where most freelance money disappears. Not because clients are dishonest. Because no one is pushing back, and invoices sit in queues until someone does.

Why invoices go unpaid

Your client contact — the person you actually worked with — usually isn’t the one approving payment. They handed the invoice to someone else and moved on. When payment doesn’t arrive, they assume it did. When it does arrive but payment hasn’t come through, they assume it’s in progress.

Accounts departments process payment in batches and respond to friction. An unpaid invoice with no follow-up creates no friction. It waits.

The follow-up isn’t awkward. It’s the trigger that starts the process.

The escalation sequence

Day 1 (due date, no payment). Do nothing. Give the day. Bank transfers often clear overnight — “due today” regularly means “paid tonight.”

Day 2–3: short neutral reminder.

Subject: Invoice #[number] — payment due [date] Hi [name], just checking in on invoice #[number] for [amount], due [date]. Let me know if anything’s needed on my end.

One sentence. Invoice number, amount, date. No “I hope this finds you well,” no apology for asking.

Day 7: firmer follow-up. Reference the first reminder.

Subject: Invoice #[number] — 7 days overdue Hi [name], following up on invoice #[number] for [amount], now 7 days past the due date. Can you confirm when payment will be processed?

“Overdue” is factual, not aggressive. Asking for a confirmation date either produces one — useful — or forces the client to actively avoid answering, which also tells you something.

Day 14: formal notice. Different register. State the late interest clause if it’s in your contract.

Subject: Formal notice — invoice #[number] overdue 14 days This is a formal notice that invoice #[number] for [amount] is now 14 days overdue. Per our agreement, late payments accrue interest at [rate]% from the due date. Please confirm payment within 48 hours to avoid further action.

This puts the non-payment on record. In most jurisdictions, a formal notice also strengthens your position if it goes further.

Day 21+. Decide between small claims court (viable for smaller amounts, often £50–£100 to file) or a solicitor’s letter before action. The letter alone resolves most cases — it signals that you know the next step and will take it. Most clients pay rather than deal with it.

What not to do

Don’t get emotional in writing. Every email you send is a potential exhibit if this ends in court. Keep the register factual.

Don’t threaten what you won’t follow through on. If you say legal action by Friday, file by Friday. Empty threats devalue every future message.

Don’t keep working. If a client owes you money and you’re starting a second phase, stop. Delivering more work to a non-paying client increases your exposure without changing the dynamic.

The contract clause that makes this easier

If your contract includes a late payment clause, the conversation is procedural, not personal. “Per our agreement, interest accrues after 14 days” is information, not confrontation. The client already agreed to it.

One sentence is enough: “Invoices unpaid after [X] days accrue interest at [rate]% per month.” It doesn’t need to be enforced regularly to work — its presence alone changes behaviour.

The root cause worth fixing

Most late payments aren’t bad faith. They’re process failures — yours or theirs. Missing bank details, no due date, vague line items that accounts flagged for clarification. A complete invoice with unambiguous payment information removes the most common reasons payment stalls before it even starts.

Chase the overdue invoice. Then fix the terms so the next invoice has real enforcement behind it — what to set in your contract and on your invoices before work begins is what makes this escalation less necessary.

Timescanner keeps a complete record of hours, periods, and billing by client — so when an invoice is disputed or a client requests backup, the documentation is already there. Works with any iCal-compatible calendar.