Chasing Without the Cringe: A UK Sole Trader’s First Late-Invoice Routine

Your first late invoice can feel oddly personal. You did the work, you sent the PDF, and now the due date has slid past with no money and no message. The temptation is either to say nothing and hope, or to fire off a terse email that makes the whole relationship weird.

Neither is a great business habit. A better approach is to treat payment chasing as a small routine you run on purpose. Not a confrontation. Not a personality test. Just a ladder of reminders that makes it easy for a decent client to pay you, and gives you a clear paper trail if they turn out not to be decent.

This routine is written for UK sole traders sending their first invoices, but it works for anyone who wants a calmer way to handle overdue money.

Before the due date: remove the excuses

The best chase is the one you barely have to make. Before an invoice goes out, check that it is genuinely easy to pay. That means a clear invoice number, the amount, what the work was, your payment terms, the due date, and your bank details in a format a human can copy without squinting.

If your client asked for a purchase order number, put it on the invoice. If they need a remittance advice, say you can send one. If they use a portal, ask early whether you need to upload the invoice there instead of emailing it. A surprising number of late payments are really admin payments that got stuck at reception.

Then set four calendar reminders: three days before the due date, the due date itself, one working day after, and seven days after that. Add a final one at fourteen days. Label them with the invoice number. This is your ladder. You are not relying on memory or mood.

The pre-due nudge: three days out

A short heads-up before the due date is not rude. It is normal admin. Keep it light and assume the best.

Try something like: 'Hi Sam, quick heads-up that invoice 014 for £450 is due this Friday. I have attached it again in case it helps your finance person. No action needed if it is already scheduled.'

That email does three jobs. It confirms the invoice exists, it names the amount and date, and it gives the client a chance to say 'actually, we need a PO' before the payment is late. Save it in a folder for that client.

Due date: check, don't pounce

On the due date, check your bank. Faster Payments can land quickly, but some businesses still run payment runs on set days. If the money is there, log it and move on. If it is not, you can send a very short note that afternoon or the next morning.

For example: 'Hi Sam, just checking invoice 014 landed with the right person. It was due today. Happy to resend anything you need.'

That is friendly, specific, and easy to answer. It also starts the written trail without sounding like a final demand.

Day one late: the firm-but-friendly script

If the due date has passed and you have had no reply, send a slightly clearer email. This is where many new sole traders either over-apologise or over-threaten. Aim for the middle: polite, direct, and focused on a payment date.

Subject line: Invoice 014 – due 12 November

Body: 'Hi Sam, I hope you are well. Invoice 014 for £450 was due yesterday. Could you confirm it has been approved for payment and let me know the expected payment date? If anything is missing, such as a PO number or a remittance detail, tell me and I will sort it today. Thanks, Alex.'

If you have a phone number and no reply after two working days, ring them. Keep it short: 'I am just checking where invoice 014 is in your payment run.' Write a note of what was said and when. Do not rely on a chat by the kettle as your only record.

Day seven: document the follow-up

By day seven, you are no longer just nudging. You are building a record. Send a follow-up that refers to your earlier message and asks for a concrete answer.

Subject line: Second reminder – invoice 014

Body: 'Hi Sam, I am following up on my email below about invoice 014 for £450, which was due on 12 November. I have not had a payment date yet. Please can you confirm when it will be paid, or let me know if there is a query holding it up? I would rather fix a snag now than let this drift. I have attached the invoice and a statement. Thanks, Alex.'

Attach the invoice again. If you use accounting software, send a statement of account. If you do not, a simple PDF list of the invoice number, date, amount, and amount outstanding is fine. This is also the point to check your terms: did you agree 14 days, 30 days, or something else? Your reminder should match what was agreed, not what you wish you had agreed.

Day fourteen: escalate without drama

If there is still no payment and no explanation, move to a firmer email. Keep the tone flat and factual. You are not writing a poem about betrayal. You are setting a deadline.

Say that the invoice remains unpaid despite reminders, give a final payment date, and ask them to tell you immediately if the invoice is disputed. For example: 'If there is a dispute, please tell me what it is so we can resolve it. If payment is not made by 28 November, I may need to apply the late-payment terms in our agreement.'

If your client is a business and you agreed business-to-business terms, you may be able to charge statutory interest under the Late Payment of Commercial Debts (Interest) Act 1998. In broad terms, that can mean interest at 8% above the Bank of England base rate, plus fixed compensation. Check your contract and the current rules before you quote figures. If your client is a consumer, the statutory late-payment regime is not the right tool; rely on your agreed terms and get advice if the amount is significant.

When to mention small claims

Small claims should not be your first move, or your second. It is the point where the relationship is already damaged and you have decided the money matters more than the ongoing work. For England and Wales, look at Money Claims Online. Scotland has the simple procedure, and Northern Ireland has its own small claims process. There are limits and fees, and even a win does not guarantee instant payment.

Before you go there, send a clear letter before action with the invoice, the amount, the history of reminders, and a final deadline. Keep everything. A calm paper trail is more useful than a dramatic threat.

The admin that makes the ladder work

Keep a simple invoice log: invoice number, client, amount, due date, reminders sent, replies, payment date. Save emails in a folder per client. Use a separate business bank account so you can see payments clearly. If a client is repeatedly late, change your terms for next time: a deposit, shorter payment terms, or staged payments.

Chasing an invoice is not a sign that you are bad at business. It is part of running one. Most late payments are admin delays, not malice. A planned ladder keeps your cash flow moving, keeps the relationship human, and gives you evidence if the human part stops working.