A UK Demand Letter, formally known as a Letter Before Action (LBA) or Letter Before Claim, is a written formal demand for payment of an outstanding debt sent to a debtor in England and Wales before the creditor commences court proceedings. It is a mandatory step in the debt recovery process under the Pre-Action Protocol for Debt Claims, which came into force on 1 October 2017 as part of the Civil Procedure Rules (CPR).

The Pre-Action Protocol for Debt Claims applies to any business (including sole traders and public bodies) claiming payment of a debt from an individual, including a sole trader. Practice Direction — Pre-Action Conduct and Protocols applies more broadly to all civil litigation, including business-to-business debt claims. The purpose of the Protocol is to encourage early communication between the parties, enable the debtor to verify the debt, promote settlement without the need for court proceedings, and ensure that litigation is a last resort.

The Letter Before Action must contain specific information: the amount of the debt, sufficient details to identify the debt (invoice number, contract reference, or account number), a statement that the creditor is willing to accept payment by instalments and to consider a reasonable repayment plan, information about free independent debt advice services available to the debtor, and a clear warning that if payment or a satisfactory response is not received within 30 days, the creditor intends to issue court proceedings. The Protocol also requires the creditor to enclose a Reply Form and an Information Sheet (standard templates available from the Civil Procedure Rules committee) with the letter if the debtor is an individual.

For commercial debts (business to business), the Late Payment of Commercial Debts (Interest) Act 1998 gives the creditor a statutory right to claim interest at 8% above the Bank of England base rate from the date the payment became due, plus a fixed-sum compensation payment ranging from forty to one hundred pounds depending on the size of the debt. These statutory remedies exist to discourage late payment in commercial transactions and to ensure that creditors are not out of pocket as a result of a debtor's failure to pay on time.

Failure to send a proper Letter Before Action, or failure to comply with the Pre-Action Protocol for Debt Claims, can have serious consequences in court proceedings. The court may impose costs sanctions under CPR Part 44, stay the proceedings until the Protocol has been complied with, refuse to award interest for the period of non-compliance, or make an adverse costs order even if the creditor wins the case. Judges routinely ask about Pre-Action Protocol compliance at the first case management hearing.

A Letter Before Action is needed whenever a creditor in England and Wales intends to recover a debt through the County Court and the debtor has failed to pay despite earlier reminders. It is the formal last step before issuing court proceedings and is required by the Pre-Action Protocol for Debt Claims.

Unpaid invoices for goods or services are the most common scenario. A business that has delivered products, completed construction work, provided professional services, or supplied goods on credit terms and has not received payment within the agreed period should send a Letter Before Action after informal collection attempts (telephone calls, reminder emails, statements of account) have failed.

Loan repayments that have fallen into default trigger the need for a formal demand. Where a creditor has advanced funds under a loan agreement and the borrower has missed scheduled repayments, a Letter Before Action documents the outstanding principal, accrued interest, and any default charges, and gives the borrower a final opportunity to bring the account up to date or agree a repayment plan.

Rent arrears and service charge disputes in commercial property contexts often require a Letter Before Action. While residential landlords typically follow the section 8 notice procedure under the Housing Act 1988, commercial landlords may pursue a County Court money claim for arrears, which requires compliance with the Pre-Action Protocol.

Professional fee disputes arise when clients fail to pay solicitors, accountants, architects, surveyors, or other professionals. The Letter Before Action sets out the fees incurred, the contractual basis for the charges, and the consequences of non-payment.

Contractual damages claims, where one party has suffered a financial loss as a result of the other party's breach of contract, also require a Letter Before Action before proceedings can be issued. The letter should quantify the loss claimed and explain how the amount has been calculated.

Consumer disputes where a business is owed money by an individual consumer require particular care. The Pre-Action Protocol for Debt Claims imposes additional requirements on creditors pursuing individual debtors, including the obligation to provide information about free debt advice services, to pause enforcement action while the debtor seeks advice, and to consider reasonable repayment proposals.

A valid and effective Letter Before Action for England and Wales must contain several key elements to comply with the Pre-Action Protocol for Debt Claims and to demonstrate to the court that the creditor has acted reasonably.

Party identification is essential. The letter must clearly identify the creditor (the person or business owed the money) and the debtor (the person or business that owes the money), including full legal names, addresses, and any relevant reference numbers such as account numbers, customer reference numbers, or Companies House registration numbers.

The debt details must be specified with sufficient precision to enable the debtor to identify the debt. Include the amount owed in pounds sterling, the date the debt arose, the contractual or invoicing basis for the debt (invoice number, contract date, purchase order number), a description of the goods or services supplied, and the original due date for payment. If the debt has been partially paid, state the payments received and the remaining balance.

Previous collection efforts should be summarised to demonstrate that the creditor has attempted to resolve the matter informally before resorting to formal action. This might include reminder emails, telephone calls, statements of account, and earlier written demands.

Statutory interest and compensation should be calculated if the debt is a commercial debt within the meaning of the Late Payment of Commercial Debts (Interest) Act 1998. The interest rate is 8% above the Bank of England base rate (the reference rate), calculated on a daily basis from the date the debt became due. The fixed-sum compensation is forty pounds for debts up to nine hundred and ninety-nine pounds and ninety-nine pence, seventy pounds for debts between one thousand and nine thousand nine hundred and ninety-nine pounds and ninety-nine pence, and one hundred pounds for debts of ten thousand pounds or more.

The response period must be at least 30 days from the date of the letter. During this period, the debtor may pay in full, propose a repayment plan, dispute the debt, or seek independent debt advice. The letter should clearly state the deadline date.

Payment instructions must be provided, including the preferred payment method (bank transfer, cheque, or online payment portal) and the relevant details (sort code, account number, payee name, reference).

The warning of court proceedings must be explicit. The letter should state that if payment or a satisfactory response is not received by the deadline, the creditor intends to commence County Court proceedings without further notice. It should explain the consequences: court fees, legal costs, enforcement costs, and the recording of a County Court Judgment (CCJ) on the Register of Judgments for six years, adversely affecting the debtor's credit rating.

Free debt advice services must be mentioned if the debtor is an individual. The standard organisations are Citizens Advice, StepChange, National Debtline, and MoneyHelper.

Alternative dispute resolution should be addressed. The court expects parties to have considered ADR before issuing proceedings. The letter should indicate whether the creditor is willing to consider mediation, negotiation, or another ADR mechanism. Under CPR Part 44, the court may penalise a party that unreasonably refused to engage in ADR by making an adverse costs order.