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Customer Concentration Is Not Just a Borrower Problem

A borrower's largest customer can become the bank's indirect credit exposure. If that buyer drives receivables, availability, and cash conversion, concentration is a lender issue too.

4 min readPublished Jul 30, 2026Updated Jul 30, 2026

Banker Brief

Lender angle
Help lenders turn customer concentration into a constructive credit and growth review.
Credit issue
One buyer can represent enough AR to affect borrowing-base availability, liquidity, and lender comfort.
Why it matters
The borrower may need the concentrated customer to grow, so the right answer is structure rather than a reflexive no.

Key Takeaways

  • Customer concentration is often the result of successful growth, not poor management.
  • The lender's question is what happens to cash flow and eligibility if the large buyer slows or defaults.
  • Coverage, terms, and limit discipline can help borrowers grow without asking the bank to ignore concentration.

Why this matters to lenders

A large customer relationship often means the borrower won meaningful work. The lender does not need to treat that as a problem by default. The question is whether the receivable structure is strong enough to support the size of the relationship.

The question is exposure, not alarm

When one buyer drives a large share of eligible AR, the lender is effectively watching that buyer too. If the account slows, disputes, or files, the borrower can lose liquidity and collateral support at the same time.

The takeaway

Trade credit insurance, revised terms, monitored limits, or a more explicit concentration plan can help the borrower keep selling while giving the lender a clearer answer to the risk.

What to Review With the Borrower

  • Top-customer share of AR, peak balances, eligibility caps, payment history, disputes, and credit-limit discipline.
  • Whether concentration reflects a strategic account, one-time project, seasonal peak, or recurring dependency.
  • Whether coverage or adjusted terms would support both the borrower's growth and the lender's collateral view.

Next Steps

  1. Review borrowers whose largest customer exceeds normal concentration comfort.
  2. Model how availability changes if that buyer becomes ineligible or slows payment.
  3. Contact us to review their existing credit management process and key debtors to protect cash flow and borrowing-base availability.

Source Notes

Borrowing-base customer concentration review; TCIA receivables assessment framework