How to Chase Late Payments Without Damaging Client Relationships (UK Guide)

Why most sole traders do not chase hard enough

The psychology of chasing is uncomfortable. You do not want to seem desperate, you do not want to damage the relationship, and you assume the client will pay eventually. But in the UK, average payment terms are already 30-60 days — and 30% of invoices are paid late.

Every unpaid invoice is an interest-free loan to your client. Chasing is not aggressive — it is professional. A client who pays on time and a client who pays late are both clients, but the second is borrowing from you without asking.

The escalation sequence

Day 1 (due date reached): Check your accounting software. If the invoice shows as unpaid and overdue, start the process.

Day 1-2 — Polite reminder: Send a brief, friendly email. Assume it was an oversight.

Subject: Invoice INV-047 — gentle reminder

Hi [Name],

I hope you're well. I'm just following up on invoice INV-047 for £[amount], which was due on [date]. Please let me know if you have any questions or if there's anything needed from my side.

Payment details: [bank details]

Many thanks, [Your name]

Day 7-10 — Second reminder: Slightly firmer. Reference the original email.

Subject: Invoice INV-047 — second reminder

Hi [Name],

I sent a reminder last week about invoice INV-047 for £[amount], now [X] days overdue. If there is an issue with the invoice, please let me know and I'll address it straight away. Otherwise, I'd appreciate payment by [new date].

[Bank details]

Thanks, [Your name]

Day 21-30 — Phone call: Email is easy to ignore. A brief, professional phone call resolves most situations. Keep it short: "I'm just following up on invoice [number] — it's about [X] days overdue. Is there anything preventing payment on your end?"

Day 30-45 — Formal written notice: Reference the Late Payment Act. This signals seriousness.

Subject: OVERDUE INVOICE INV-047 — formal notice

Dear [Name],

Invoice INV-047 for £[amount] remains unpaid [X] days after the due date of [date].

Under the Late Payment of Commercial Debts (Interest) Act 1998, I reserve the right to charge statutory interest of 8% above the Bank of England base rate on this amount, plus a fixed debt recovery cost.

Please arrange payment within 7 days. If you are experiencing difficulties, please contact me to discuss a payment arrangement.

[Bank details]

Regards, [Your name]

Day 60+ — Escalation options:

1. Small Claims Court: For amounts up to £10,000, the online Money Claim service (gov.uk/make-court-claim-for-money) is straightforward and low cost. Court fees range from £35 to £455 depending on claim size.

2. Statutory demand: A formal legal document that gives a business 21 days to pay. Used for amounts over £750. Useful as a precursor to winding-up proceedings.

3. Debt collection agency: Takes over the process for a percentage of the debt (typically 15-25%). Useful when you want to preserve your time.

Preventing late payment in future

• Require a 25-50% deposit upfront for new clients or large projects
• Include clear payment terms on every invoice
• Set up automatic reminders in Xero or QuickBooks (7 days before due, day due, 7 days overdue)
• Check Companies House for client financials before offering credit terms to new clients
• Consider a shorter payment term (14 days instead of 30) — many clients pay within your stated term whatever it is

A word on difficult clients

If a client is regularly late despite reminders, factor this into your pricing and terms. The client who pays in 60 days is more expensive to service than the one who pays in 14 days — the financing cost is real, even if invisible.