A Letter Before Action is the formal procedural step that converts an unpaid invoice into a credible threat of court proceedings. The Civil Procedure Rules require it. Most debtors who ignore everything else read this one carefully. This guide walks through what an LBA must contain in 2026, the structural template our letters follow, and the mistakes that get LBAs disregarded.
What a Letter Before Action is
A Letter Before Action, commonly called an LBA, is a formal notice from a creditor to a debtor that court proceedings will be issued unless the debt is paid within a defined window. It is the procedural gateway to litigation and is governed by the Practice Direction on Pre‑Action Conduct and Protocols, which sits beneath the Civil Procedure Rules.
The Practice Direction does not prescribe a fixed form. It does require that the parties exchange enough information before issuing proceedings to allow them to understand each other's positions and to consider whether the dispute can be resolved without litigation. An LBA is the standard mechanism for the creditor's side of that exchange.
When you should send one
The LBA is the second formal step in a debt recovery sequence, not the first. The right order is:
- An informal chaser, citing the contract and the invoice, allowing 14 days for payment.
- A formal demand citing the Late Payment Act and quantifying the statutory entitlements (compensation, interest, recovery costs), allowing 7 to 14 days for payment.
- If those are ignored, the LBA. Allowing 14 days for payment, with the explicit notice that proceedings will be issued thereafter.
Sending an LBA before the earlier steps have been taken is procedurally premature and can result in the court taking a dim view of the creditor's conduct, potentially with adverse costs consequences even if the underlying claim succeeds.
The mandatory elements
Although the Practice Direction is non‑prescriptive, courts in 2026 expect every LBA to contain the following.
1. Identification of the parties
The full legal name and registered office of both the creditor and the debtor. For limited companies, the registered company number from Companies House. Ambiguity here gives the debtor an early procedural escape route.
2. The factual basis of the claim
The contract relied on, the goods or services supplied, the invoice number and date, the payment due date, and the amount unpaid. Specific to the point of being incontrovertible.
3. The legal basis
For an undisputed commercial debt, this is straightforward. The contract obliged payment; payment was not made; the debt is therefore due. Where the Late Payment of Commercial Debts (Interest) Act 1998 is engaged, the LBA should state that the creditor relies on it for the additional sums claimed.
4. The amount claimed, itemised
Principal, statutory compensation, statutory interest (with the calculation showing the rate applied and the period covered), and reasonable recovery costs. A schedule attached as an annex is best practice for anything over a few hundred pounds.
5. The deadline for payment
Fourteen days from the date of the letter is the conventional period for a commercial LBA. Courts expect the debtor to have a reasonable opportunity to respond; ten days has been characterised as too short in some contexts, twenty‑one or longer is sometimes appropriate for unusually complex matters.
6. The consequence of non‑payment
An explicit statement that, if payment is not received within the deadline, the creditor will issue proceedings without further notice. This is the operative threat. Vague language about "considering legal action" is materially weaker.
7. An invitation to engage
The Practice Direction expects the creditor to invite the debtor to set out their position, propose a payment plan, or explain any dispute, before proceedings are issued. This is not optional. An LBA that merely demands payment without inviting any response is procedurally vulnerable.
8. The reference to alternative dispute resolution
A short reference to the parties' duty to consider ADR. In commercial debt matters this is rarely material because the debt is usually undisputed, but the court expects the words to appear.
The structural template
An LBA in 2026 follows this structure:
Common mistakes that weaken an LBA
Issuing on letterhead that looks unprofessional
The single most underestimated factor. A debtor's finance director assesses the seriousness of an LBA partly by how it looks. A letter on a generic Word template, with mismatched fonts, suggests the creditor lacks the professionalism or the resources to follow through. The same letter on solicitor's notepaper or a recovery firm's letterhead lands with materially more weight.
Vague consequence language
"We may take legal action" or "we reserve the right to issue proceedings" are weaker than "proceedings will be issued without further notice if payment is not received by [date]." The court reading the LBA after the event wants to see a clear, definite consequence threatened. The debtor reading it pre‑event responds to the same clarity.
Demanding sums that are not properly evidenced
If you claim £1,200 in interest, the schedule must show how. Daily rate, period applied, principal balance at each rest. Bald assertions of total figures invite the debtor to dispute the calculation rather than the underlying liability.
Forgetting the invitation to respond
Common in self‑drafted LBAs. The Practice Direction expects an exchange. If the LBA reads as a one‑way ultimatum without any invitation to engage, a defendant raising it in court can argue the creditor failed to comply with the protocol, with cost consequences.
Sending it to the wrong address
Always serve at the debtor's registered office, taken from Companies House. Trading addresses, branch offices, or known correspondence addresses are useful as a courtesy, but the registered office is what the court will recognise as proper service.
What happens after the LBA
One of three things.
Most commonly, the debtor pays. An LBA from a credible creditor (with a credible threat of court costs added to the debtor's bill) settles the majority of undisputed commercial debts inside the 14‑day window. The debtor's calculation has shifted: ignoring the demand now risks judgment costs, a CCJ on the credit register, and enforcement, in addition to the principal.
Sometimes, the debtor responds proposing a payment plan or setting out a dispute. This is what the Practice Direction is designed to encourage. A reasonable response opens a settlement window. An unreasonable response (manufactured disputes, frivolous denials) hardens the creditor's case for the next step.
Less often, the debtor ignores the LBA entirely. The creditor then has the procedural foundation to issue proceedings. Court fees apply, and the matter moves to one of the three tracks (small claims, fast track, multi‑track) according to value. Most undisputed debts of this kind result in default judgment within weeks if the debtor does not file a defence.
About seventy percent of undisputed commercial debts settle within fourteen days of a properly drafted LBA. Of the rest, most settle once proceedings are issued and the debtor sees the cost trajectory. Only a small minority reach trial.
When to instruct a recovery firm instead
Self‑drafting an LBA is achievable. Doing it well, on credible letterhead, with the calculation right, the language sharp, and the matter referenced properly, is harder than it looks. The decision tree is straightforward:
- Debt under £1,000 and time abundant: self‑draft.
- Debt £1,000 to £10,000 and time scarce: instruct a recovery firm. The recovery costs are payable by the debtor under the Late Payment Act, so the creditor is not out of pocket.
- Debt above £10,000 or with any complication (multiple invoices, partial payments, prior correspondence on dispute): instruct a recovery firm or solicitor. The leverage of professional letterhead is meaningful at this scale and the procedural risk of getting the LBA wrong is real.
Frequently asked questions about LBAs
Is a Letter Before Action legally required before issuing court proceedings?
It is not strictly required by statute, but the Practice Direction on Pre‑Action Conduct expects the parties to have exchanged enough information to understand each other's positions before proceedings issue. A claim brought without an LBA is procedurally vulnerable to a costs penalty even if it succeeds on the merits.
How long should the deadline for payment be?
Fourteen days is conventional for commercial debts. Shorter deadlines have been criticised by the courts; longer is appropriate for unusually complex matters. The deadline should be calculated from the date of the letter, not the date of expected receipt.
Can an LBA be sent by email?
Yes, provided the email is sent to a recognised business address for the debtor and the creditor retains evidence of delivery. A recorded‑delivery hard copy to the registered office, sent in parallel, is the conservative approach.
What if the debtor disputes the debt after receiving the LBA?
The dispute should be considered on its merits. A genuine, evidenced dispute may take the matter outside the LBA pathway entirely. A manufactured or unevidenced dispute, raised for the first time after demand, is unlikely to defeat the creditor in court but may slow recovery.
Does the Late Payment Act apply to my LBA?
If both parties are acting in the course of a business and the debt is for goods or services supplied, the Late Payment of Commercial Debts (Interest) Act 1998 almost certainly applies. The statutory compensation and interest figures should be included in the LBA's schedule of sums.