Customer Concentration Risk: A Hidden Threat to Liquidity

Customer Concentration Risk: A Hidden Threat to Liquidity

What Is Customer Concentration?

Customer concentration occurs when a significant portion of a company's revenue or accounts receivable is tied to a small number of buyers. There is no universal threshold, but lenders and credit analysts often flag concentration when a single customer represents 20 percent or more of total receivables, or when the top three to five customers together represent a large majority of the portfolio.

Why CFOs Should Pay Attention

Concentration risk is not just a credit concern — it is a liquidity concern. If a concentrated customer fails to pay, the financial impact can be immediate and severe. Beyond the direct loss, the company may face:

  • A sudden reduction in available working capital.
  • Difficulty meeting payroll, supplier payments, or debt service obligations.
  • A reduction in borrowing-base availability if the lender excludes or discounts the affected receivables.
  • Pressure on earnings and cash flow that may take months to recover.

These risks can be compounded when the concentrated customer is also a key strategic relationship, making it difficult to reduce exposure without affecting the broader business.

Concentration Can Affect the Borrowing Base

Many asset-based lenders and revolving credit facilities include concentration limits in their borrowing-base formulas. A common structure might allow a single customer to represent no more than 20 to 25 percent of eligible receivables. When a customer exceeds that limit, the excess is typically excluded from the borrowing base — reducing the amount the company can borrow even if the receivables are otherwise current and collectible.

This means that a company with strong sales to a large customer may find that its borrowing capacity does not grow proportionally with its receivables. The lender is managing its own concentration risk, but the effect falls on the borrower's liquidity.

Illustrative Example

Consider a company with $10 million in total accounts receivable. One customer — a large regional distributor — represents $3 million, or 30 percent of the total. The company's lender applies an 85 percent advance rate against eligible receivables, with a 20 percent concentration limit.

  • Without the concentration limit, eligible receivables would be $10 million, and the borrowing base would be $8.5 million.
  • With the concentration limit, $1 million of the large customer's receivables is excluded (the amount above 20 percent of $10 million). Eligible receivables drop to $9 million, and the borrowing base falls to $7.65 million.
  • The company is borrowing $850,000 less than it otherwise could — not because the receivables are bad, but because of how the lender treats concentration.

If that customer were to become insolvent, the company would face both the direct loss of $3 million in receivables and a further reduction in borrowing-base availability.

How Trade Credit Insurance May Help

Trade credit insurance can address concentration risk in two ways. First, it can protect the company against the direct financial loss if a concentrated customer fails to pay due to insolvency or protracted default. Second, some lenders will adjust their concentration limits or advance rates when insured receivables are assigned to them as collateral, potentially increasing borrowing-base availability.

The extent to which a lender will modify its borrowing-base treatment for insured receivables depends on the lender's own policies, the terms of the insurance policy, and the assignment and loss-payee arrangements. Not all lenders treat insured receivables the same way, and the insurance does not eliminate the lender's concentration concerns in every case.

Questions for Management and the Lender

CFOs managing concentration risk should consider asking:

  • Which customers represent the largest share of our receivables, and how has that changed over time?
  • Does our credit facility include concentration limits, and are any customers currently near or above those limits?
  • What would happen to our borrowing base if our largest customer became insolvent or stopped paying?
  • Have we discussed our concentration exposure with our lender, and does the lender have any flexibility in how it treats insured receivables?
  • Would trade credit insurance on our concentrated customers reduce our exposure to a level that is manageable without insurance proceeds?

The Bottom Line

Customer concentration is a risk that can be easy to overlook when business is going well. A large, reliable customer can feel like an asset — and in many ways it is. But the same customer can become a significant liability if payment stops. CFOs who understand their concentration exposure, discuss it with their lenders, and consider tools such as trade credit insurance are better positioned to protect liquidity when it matters most.

This article is for general informational purposes only and does not constitute insurance, legal, financial, or tax advice. Coverage terms, conditions, exclusions, lender requirements, and availability vary by insurer, lender, and transaction. Consult with a qualified insurance and financial professional regarding your specific situation.

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