An invoice going quiet is different from an invoice being late.
Late invoices get paid after a nudge. Quiet invoices — the ones where you sent the invoice, they confirmed receipt, and then... silence — those need a different approach.
Here's the sequence I use.
Why invoices go quiet
Before you reach for aggressive language, understand what's actually happening:
- Buried in inbox — your invoice arrived during a chaotic week and got buried. No malice, just volume.
- Approval bottleneck — your contact needs sign-off from finance, who needs sign-off from someone on leave.
- Cash flow gap — they're waiting for their own payment before releasing yours.
- Genuine dispute — something didn't match expectations and they'd rather ghost than say it.
- Hoping you'll forget — this is the minority, but it exists.
The email sequence works differently depending on which category you're in.
Stage 1: The Soft Ping (Day 1 overdue)
Subject: Invoice #[X] — just checking this landed okay
Hi [name], quick check — did invoice #[X] for £[amount] arrive all right? Was due [date]. Happy to resend if it got buried.
Short. No blame. Gives them an easy out. Resolves about 60% of cases.
Stage 2: Direct Question (Day 7)
Subject: Following up on Invoice #[X]
Hi [name], following up on invoice #[X] for £[amount], now 7 days overdue. Can you let me know when payment will be made? If there's any query on the work or the invoice, happy to sort it quickly.
"When will payment be made" is a different question to "please pay." It invites a specific answer.
Stage 3: Formal Notice with Late Payment Act Reference (Day 14–21)
Subject: Formal notice — Invoice #[X] overdue
Dear [name], formal notice that invoice #[X] for £[amount] remains unpaid, [X] days overdue. Under the Late Payment of Commercial Debts (Interest) Act 1998, I'm entitled to charge 8% above Bank of England base rate on overdue commercial debts. I haven't applied this charge yet. Please arrange payment by [date, 7 days from today].
This email changes the conversation. Citing legislation signals you know your rights. Most delayed-but-intending-to-pay clients act immediately.
Stage 4: Letter Before Action (Day 28+)
At this point you're looking at Small Claims (under £10,000 in England and Wales, no solicitor needed) or a formal solicitor's letter. The letter before action is often enough — it shows you're serious and willing to go the legal route.
Prevention beats recovery
- Put payment terms in bold on the invoice itself, not just in the contract
- Take a deposit (25–50%) before starting work
- Set automated payment reminders if your invoicing software supports it
- Add a late payment interest clause to your standard contract — the Late Payment Act applies anyway, but having it written in your contract means clients can't claim they didn't know
The Getting Paid Toolkit has the full seven-stage email sequence, the Late Payment Act interest calculator, deposit policy templates, and the specific contract clause that makes clients take payment terms seriously.
If late payments are a regular problem, having the sequence ready before you need it is worth more than trying to write it when you're frustrated and the invoice is 30 days overdue.
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