Forget filling in brackets in a Word document. Generate a professional, legally-informed late payment demand letter tailored to your specific job and customer — free, in 30 seconds.
A formal late payment letter is the single most effective tool a UK tradesperson has when chasing an unpaid invoice. Research consistently shows that a properly written Letter Before Action gets payment over 90% of the time — without ever going near a court. The problem is that most templates are generic, make you fill in placeholders yourself, and don't reference the specific UK law that actually carries weight with customers.
This page gives you something better: an AI-generated letter based on your specific situation — the amount owed, your trade, the customer's name, and how long they've been ignoring you.
Fill in your details and get a professional demand letter in 30 seconds — referencing the Late Payment Act, with the right tone to get results.
Generate My Letter — Free →Most late payment letter templates you'll find online were written for any business, not specifically for tradespeople. They use generic language, require you to manually fill in every placeholder, and often miss the specific legal references that make a demand letter actually work.
Whether you use our generator or write your own, a late payment demand letter that actually gets results needs to include all of the following:
Here's an example of the kind of letter our generator produces — professional, firm, and legally-informed without being aggressive:
Dave's Plumbing
1 July 2026
Dear Mr Smith,
RE: Outstanding Invoice — £1,450.00 — Overdue 45 Days
I am writing to formally request payment of the outstanding balance of £1,450.00 owed to Dave's Plumbing in respect of plumbing works completed at your property. Despite my previous communications, this invoice remains unpaid 45 days beyond the agreed payment date.
Under the Late Payment of Commercial Debts (Interest) Act 1998, I am entitled to charge statutory interest at 8% above the Bank of England base rate on this overdue balance, currently amounting to [calculated interest]. I am also entitled to claim fixed compensation of £70 under the same Act.
I require payment of the full outstanding balance of £1,450.00, plus any applicable statutory interest, within 7 days of the date of this letter...
How you send the letter matters almost as much as what's in it. For the best results:
If your demand letter goes unanswered after the deadline, you have clear options:
On top of the original invoice amount, you're legally entitled to charge statutory interest under the Late Payment of Commercial Debts (Interest) Act 1998. At the current rate of 11.75% per year, that adds up faster than most people realise — and mentioning it in your letter often prompts faster payment than the letter alone.
No. A Letter Before Action from you personally carries the same legal weight as one from a solicitor — it's the content and the clear intention to escalate that matters, not who signs it. A solicitor's letter can sometimes add weight for very large sums, but for typical tradesperson invoices it's rarely worth the cost.
Email is fine and often faster, but posting a physical copy as well significantly increases its impact. A letter in an envelope signals formality in a way that an email simply doesn't. Send both if you want maximum effect.
A dispute doesn't automatically cancel the invoice — respond to their specific concerns in writing, gather your evidence (photos, signed quote, messages), and continue the process. If they have a genuine partial concern, consider whether a partial adjustment is worthwhile, but don't discount the full amount just to avoid conflict.
One formal demand letter with a clear deadline is typically sufficient before filing a small claims court claim. Courts expect to see that you gave the customer a reasonable opportunity to pay before escalating — one formal letter with a 7-day deadline satisfies this.
Yes — the late payment letter generator is completely free. Enter your email to receive a copy of the generated letter. No account required, no credit card.
Stop chasing. Get your money back.
Generate My Free Letter →This article provides general information based on UK law as of June 2026 and does not constitute legal advice. For complex disputes or high-value claims, consult a solicitor.