A debt collection letter is a formal written request for payment of an overdue invoice. The most reliable approach is a short escalating series: a friendly reminder, a firmer follow-up, a final demand, and a letter before action. Chaser's UK templates below are ready to copy, adapt, and send at each stage so you get paid without souring the relationship.
Key takeaway
Send letters in a defensible order, keep the tone matched to the stage, and record every step. In the UK, you can charge statutory interest and fixed compensation on overdue commercial invoices, and you must send a letter before action before starting a court claim against an individual or sole trader.
Late payment is one of the most common reasons growing businesses run short of cash. Finance teams spend around 14 hours a week chasing receivables manually (Intuit), and roughly 8% of revenue is written off each year through bad debt (Sage). A clear, well-timed letter is often all it takes to move an invoice from overdue to paid, because a missed payment is frequently an oversight rather than a refusal.
~14 hrs
a week spent chasing receivables by hand (Intuit)
~8%
of revenue written off annually as bad debt (Sage)
64%
of finance leaders lack confidence in their cash flow data (CFO.com)
What is a debt collection letter?
A debt collection letter is a formal written notice that an invoice is overdue and that payment is now expected. It states the amount owed, references the original invoice, sets a clear deadline, and explains what happens next if the debt stays unpaid. It is sometimes called a collection letter, a debt recovery letter, or, at the final stage, a letter of demand. A good debt collection letter is factual, specific, and matched in tone to how overdue the payment is.
When should you send each debt collection letter?
Debt collection works best as an escalating sequence rather than a single letter. Each stage raises the pressure slightly while keeping a paper trail that protects you if the matter later reaches court. Use the timings below as a default and adjust them to your own payment terms.
| Stage | Letter | Typical timing | Tone |
|---|---|---|---|
| 1 | Friendly reminder | 1 to 7 days overdue | Warm, assumes an oversight |
| 2 | Firmer follow-up | 14 to 21 days overdue | Polite but direct, references stage 1 |
| 3 | Final demand | 30 days overdue | Formal, states consequences |
| 4 | Letter before action | After final demand | Strictly factual, legal notice |
| 5 | Notice of referral | 45+ days overdue | Assertive, confirms escalation |
What should every debt collection letter include?
Whatever the stage, an effective debt collection letter contains the same core details so the debtor cannot claim confusion. Include each of the following:
- The invoice number and the original due date
- The exact amount owed, plus any interest or charges
- Clear payment instructions, such as bank transfer details
- A specific new deadline to pay
- An invitation to get in touch if there is a dispute or a payment difficulty
- A note of previous contact, to show the escalation was reasonable
Attach the original invoice to every letter. Keeping this record consistent across all your reminders makes your position far stronger if you later need to claim through the courts. Chaser's credit control software keeps this history automatically, so every reminder is logged against the invoice.
Debt collection letter templates: the swipe file
Copy any template below, replace the text in [square brackets] with your own details, and send. The templates are written for UK businesses chasing overdue B2B invoices, but the structure works in any market. Keep the same invoice number, amounts, and reference details consistent through the whole series.
Template 1: Friendly payment reminder (1 to 7 days overdue)
Send this first. At this point you should assume the invoice simply slipped through. A warm, low-pressure nudge protects the relationship and often gets the invoice paid on its own.
Subject: Reminder: invoice [invoice number] now due
Dear [contact name],
I hope you are well. This is a quick reminder that invoice [invoice number] for [£amount GBP], issued on [invoice date], became due for payment on [due date] and is showing as unpaid on our records.
If payment is already on its way, please ignore this note and accept our thanks. If not, you can settle the invoice by [payment method and details]. The invoice is attached again for convenience.
If anything is unclear or there is a problem with the invoice, please reply to this email and we will sort it out quickly.
Kind regards,
[your name]
[your position], [your company]
Template 2: Firmer follow-up (14 to 21 days overdue)
Send this when the friendly reminder has gone unanswered. Reference the first letter, keep the tone firm but professional, and make the next step explicit.
Subject: Second reminder: invoice [invoice number] now [number] days overdue
Dear [contact name],
I am following up on invoice [invoice number] for [£amount GBP], which was due on [due date] and is now [number] days overdue. Our reminder of [date of first reminder] has not yet had a reply.
Please arrange payment of [£amount GBP] by [new deadline] using [payment method and details]. We value working with you and would like to keep things on track, so if there is a difficulty with this payment, contact us and we can discuss a payment plan.
If payment has already been made, please let me know the date and reference so I can update our records.
Kind regards,
[your name]
[your position], [your company]
Template 3: Final demand (30 days overdue)
Send this when earlier reminders have been ignored. It is your last request before formal action. State the full amount, add any statutory interest and compensation you intend to claim, and give a firm final deadline.
Subject: Final demand for payment: invoice [invoice number]
Dear [contact name],
Despite our reminders of [dates sent], invoice [invoice number] remains unpaid and is now [number] days overdue. This letter is a final request for payment before we take further action.
The amount now due is set out below:
Invoice total: [£amount GBP]
Statutory interest to date: [£amount GBP]
Fixed compensation: [£amount GBP]
Total payable: [£total GBP]
Please pay the total in full by [final deadline] using [payment method and details]. If we do not receive payment or hear from you by that date, we will begin formal recovery, which may include a letter before action and a claim through the courts. Court action can result in a County Court Judgment, which affects your ability to obtain credit.
If you are unable to pay in full, contact us before the deadline to discuss a payment plan.
Yours sincerely,
[your name]
[your position], [your company]
Template 4: Letter before action (LBA)
A letter before action is the final formal notice before you issue a court claim. In England and Wales, the Pre-Action Protocol for Debt Claims requires you to send one before claiming against an individual or sole trader, and to allow at least 30 days to respond. Even for business-to-business debts, courts strongly expect it. Keep the letter strictly factual.
[Your company name and address]
[Debtor name and address]
[Date]
Dear [contact name],
Re: Letter before action, invoice [invoice number]
This is a formal letter before action. Invoice [invoice number] for [£amount GBP], due on [due date], remains unpaid despite our reminders of [dates sent].
The total now owed is [£total GBP], made up of the invoice amount, statutory interest of [£amount GBP], and fixed compensation of [£amount GBP].
Unless payment of [£total GBP] is received by [deadline, at least 30 days from the date of this letter for an individual or sole trader], we will begin court proceedings to recover the debt without further notice. We may also claim court fees and additional interest.
If you dispute this debt, or wish to propose repayment, please respond in writing by [deadline] setting out your position. A reply form is enclosed.
Yours sincerely,
[your name]
[your position], [your company]
Template 5: Notice of referral to collections or legal action (45+ days overdue)
Use this only when the deadline in your letter before action has passed and you are genuinely proceeding. Never threaten action you do not intend to take. This letter confirms what is now happening.
Dear [contact name],
As the deadline in our letter before action of [date] has passed with no payment or response, invoice [invoice number] for [£total GBP] has now been referred to [our debt collection partner / our solicitor] to begin recovery.
You may still settle this matter directly by paying [£total GBP] in full by [date]. After that, all further contact will be handled by [collections partner or solicitor].
Yours sincerely,
[your name]
[your position], [your company]
How do you write a debt collection letter, step by step?
If you would rather build a letter from scratch, follow these steps. Each one keeps the letter clear, professional, and defensible.
- Use a professional format. Add your business name, address, and contact details at the top, then the date and the debtor's details.
- State the purpose in the first line. Make clear this is about an overdue invoice, and name the invoice number.
- Give the debt details. Include the amount owed, the original due date, and any interest or charges.
- Set a clear deadline. Specify the exact date by which you expect payment.
- Explain how to pay. Provide bank transfer details or a payment link, and reference the invoice.
- Offer a route out. Invite the debtor to contact you about a payment plan if they are struggling.
- State the consequences. Explain, factually, what happens next if the debt stays unpaid.
- Keep a copy. Save every letter and note the date sent, so you have a full record.
What are the UK legal rules for debt collection letters?
UK debt collection is governed by rules on fairness, notice, and interest. Getting these right protects you and strengthens your position if the debt reaches court.
Late payment interest and compensation
Under the Late Payment of Commercial Debts (Interest) Act 1998, you can charge statutory interest on overdue business-to-business invoices at 8% plus the Bank of England base rate, unless your contract sets a different rate. You can also claim fixed compensation for the cost of recovering the debt, as set out by gov.uk:
| Debt amount | Fixed compensation |
|---|---|
| Up to £999.99 | £40 GBP |
| £1,000 to £9,999.99 | £70 GBP |
| £10,000 or more | £100 GBP |
State these amounts in your final demand and letter before action if you intend to claim them.
Notice and fair treatment
The Financial Conduct Authority requires that debt collection communications are fair, clear, and not misleading. Aggressive or threatening language is not allowed, and you must give the debtor a realistic chance to respond before escalating. Before issuing a court claim in England and Wales, you must follow the Pre-Action Protocol for Debt Claims and send a letter before action, giving an individual or sole trader at least 30 days to reply.
Statute-barred debts
In England and Wales, a debt usually becomes statute-barred six years after the last payment or written acknowledgement. You cannot take court action to recover a statute-barred debt, and your letters must not imply that you can.
A note for US debtors
If you are chasing a debtor in the United States, the Fair Debt Collection Practices Act (FDCPA) applies instead. Third-party collectors must include a notice that the letter is an attempt to collect a debt, tell the debtor they have 30 days to dispute it, and name the current creditor. Avoid deadlines that expire inside that 30-day window. State-level rules, such as California's Rosenthal Act, may add further requirements.
What if the debtor still does not respond?
If letters go unanswered, escalate in a structured way rather than giving up. A defensible sequence looks like this:
- Follow up by phone to confirm the debtor received your letters
- Send the final demand and, if needed, the letter before action by recorded delivery
- File a claim through Money Claim Online or instruct a solicitor
- Refer the debt to a debt collection agency that can negotiate on your behalf
Chaser collects debts for businesses of all sizes and can step in when in-house chasing has run its course. Working with a collections partner early also keeps days sales outstanding under control before overdue invoices turn into bad debt.
FAQs
Want to get paid faster without chasing every invoice by hand? Speak to an expert to see how Chaser can do it for you.
This article is general guidance, not legal advice. Check your position with a qualified adviser before taking court action.
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