How to Manage a Late-Paying Customer Without Losing the Account

Separate the relationship from the debt

The most common mistake when chasing a valued customer is allowing relationship considerations to delay or soften the collections process. This often results in a larger, older debt that is more difficult to recover. The customer's commercial team and their finance team are separate — your account manager need not be involved in the collections conversation at all.

Frame the communication as a finance-to-finance matter. A call from your finance director to their finance director or accounts payable manager, referencing the specific invoice numbers and due dates, is a professional and appropriate step that does not compromise the commercial relationship.

Escalate in defined stages

A structured escalation gives the customer clear expectations and gives you a defensible process. Stage one: a payment reminder on or shortly before the due date. Stage two: a follow-up call or email on the due date if payment has not cleared. Stage three: a written notice at day 7 citing the invoice details and your payment terms. Stage four: a formal letter before action at day 28–35, referencing your right to charge statutory interest under the Late Payment of Commercial Debts (Interest) Act 1998.

At each stage, document the contact: the date, the medium, who you spoke to, and their response. This record protects you if the matter escalates to a formal dispute or a court claim.

Understand why payment is late before assuming the worst

Late payment can result from an administrative error (wrong PO number on the invoice, payment lost in a processing queue), a cash-flow problem at the customer, or a dispute about the quality or delivery of goods or services. These require very different responses.

If payment is late due to an administrative error, fix it quickly and confirm the revised payment date in writing. If the customer has a cash-flow problem, you may be able to agree a payment plan — get it in writing and treat any breach of the plan as a trigger for immediate formal action. If there is a dispute, isolate it: attempt to agree that any undisputed portion of the invoice is paid promptly while the dispute is resolved separately.

Use leverage proportionately

You have several levers that do not require legal proceedings. Placing the customer on credit hold — pausing new orders until the overdue balance is cleared — is effective and proportionate. Do this via a formal written notice, not informally in a conversation, so the customer understands this is a business decision rather than a personal one.

Statutory interest accrues automatically on B2B debts after the agreed payment term. You do not need to waive this right as part of any payment arrangement — and referencing it (politely but clearly) often accelerates payment from customers who understand commercial debt recovery.

When to escalate to formal recovery

If a customer is more than 60 days overdue on a significant balance, has not responded constructively to your collections process and is not placing new orders that justify maintaining the relationship, formal recovery becomes appropriate. A solicitor's letter before action is the standard next step and prompts payment in a significant proportion of cases without requiring court proceedings.

For debts below £10,000, the small claims track of the County Court is accessible and cost-proportionate. Above that threshold, the fast track or multi-track may be appropriate. Take legal advice on the most suitable route and the likely recovery timeline before committing to proceedings.