Can a Company Borrow When One Customer Represents Most of Its Revenue?

Why customer concentration matters to a lender

If a borrower loses its single large customer, its ability to service debt may collapse rapidly. This is a real and measurable risk that any responsible lender must account for. The question is not whether the risk exists — it clearly does — but whether it is adequately understood, bounded, and mitigated.

The lender will typically model a stress scenario in which the anchor customer relationship ends at various points during the loan term, and will assess whether the remaining business plus any assets held as security are sufficient to recover the outstanding balance.

Factors that reduce the concern

Several factors can materially reduce the weight a lender places on customer concentration. The most important is the contractual position with the anchor customer: a multi-year agreement with clear renewal terms and termination clauses signals durability. A customer that is itself a large, creditworthy organisation — a FTSE-listed company or a public sector body — provides additional comfort compared with a smaller private buyer.

• Length and terms of the contract with the anchor customer
• History of the relationship: has it been renewed previously?
• Credit quality and financial position of the anchor customer
• Proportion of revenue that would survive the loss of this customer
• Speed at which diversification is realistically achievable

Invoice finance as an alternative framing

Where the relationship with the anchor customer generates regular invoiced receivables, invoice finance or selective invoice discounting may be a more natural fit than a term loan. The facility is secured against the invoices themselves, and the lender's exposure is directly linked to the strength of the underlying debtor — the large customer — rather than the general creditworthiness of the borrower.

What to prepare when applying

Be transparent about the concentration. Prepare a clear explanation of the relationship, including how long it has existed, what the contractual basis is, and what your medium-term diversification plans look like. If you are already taking steps to win additional customers, evidence of that pipeline will strengthen the application.