How to Chase Unpaid Invoices Without Losing the Client

The Late Payment Problem

Late payment is a serious issue for UK tradespeople. Research consistently shows that small businesses are owed billions in overdue invoices at any given time. For a sole trader or small contractor, even one or two unpaid invoices can cause real cash flow problems.

The good news: most late payments aren't deliberate. Clients forget, invoices get lost in inboxes, or payment processes are slow. A professional, persistent approach usually gets results.

Step 1: Send a Clear Invoice Immediately

The best way to avoid late payment is to invoice promptly and clearly. As soon as the job is done (or at agreed milestones), send your invoice with:

• A clear due date (e.g. "Payment due by 28 February 2026")
• Your bank details prominently displayed
• A unique invoice number for easy reference
• The exact amount owed, with VAT shown separately if applicable

Don't wait until the end of the month. Invoice the day the job is finished.

Step 2: A Friendly Reminder (Day 1–3 Overdue)

If the due date passes without payment, send a polite reminder. Keep it friendly — assume it's an oversight.

Email template:

Subject: Invoice #INV-042 — Friendly Reminder

>

Hi [Name],

>

I hope you're well. I just wanted to drop you a quick note as invoice #INV-042 for £[amount] was due on [date]. Could you let me know when I can expect payment?

>

I've attached the invoice again for reference.

>

Many thanks,

[Your name]

Step 3: A Firmer Follow-Up (Day 7–14 Overdue)

If there's still no response after a week, follow up again — this time a little more directly.

Email template:

Subject: Invoice #INV-042 — Payment Overdue

>

Hi [Name],

>

I'm following up on invoice #INV-042 for £[amount], which was due on [date] and remains unpaid.

>

Please could you arrange payment this week? If there's an issue, I'm happy to discuss.

>

My bank details are: [sort code / account number]

>

Thanks,

[Your name]

Also try calling. A phone call is often more effective than email.

Step 4: A Formal Letter Before Action (Day 30+ Overdue)

If the invoice is more than 30 days overdue and you've had no response, it's time to send a formal letter before action. This is a legal requirement before you can take a client to the small claims court.

Your letter should state:

• The amount owed and invoice number
• That payment is required within 7 or 14 days
• That you will pursue the debt through the courts if payment is not received

Send it by email and recorded post.

Step 5: Small Claims Court

For debts up to £10,000, you can use the UK small claims court (Money Claim Online). The process is straightforward and you don't need a solicitor. Filing fees start at £35.

If you win, the court can order the client to pay your costs as well as the debt.

Your Legal Rights on Late Payment

Under the Late Payment of Commercial Debts (Interest) Act 1998, you're entitled to charge:

• Statutory interest of 8% above the Bank of England base rate on overdue invoices
• A fixed debt recovery charge of £40–£100 depending on the invoice amount

You don't have to claim these, but knowing your rights gives you leverage.

How to Reduce Late Payments in Future

• Require a deposit — ask for 25–50% upfront on larger jobs
• Shorter payment terms — use 7 or 14 days instead of 30
• Invoice immediately — don't wait until the end of the month
• Make it easy to pay — include your bank details on every invoice
• Track your invoices — know which ones are outstanding at all times

QuoteInvoice shows you paid, outstanding, and overdue invoices at a glance — so nothing slips through the cracks.

Try QuoteInvoice free for 14 days. No credit card needed.