A customer doubles its orders in one year. Sales celebrates. Operations ramps up. The account becomes one of the company’s most important relationships. Then the CFO looks at the aging report.
The customer isn’t necessarily failing to pay. They’re simply taking longer—and because their purchases have grown so quickly, the outstanding balance has grown with them. What looked like successful customer growth is now creating a very different question: How much of the company’s cash flow is tied to one customer?
For CFOs, this is where revenue growth and credit risk can collide.
Can a Growing Customer Become a Bigger Credit Risk?
Yes. A customer can become more valuable to the business while simultaneously becoming more financially important to its receivables portfolio.
Consider a distributor whose largest customer accounted for $500,000 in annual purchases three years ago. After rapid expansion, that customer now generates $2 million in annual sales—and carries $400,000 in outstanding receivables. The customer may still be profitable. The invoices may still be collectible.
But the company’s exposure has changed dramatically.
CFO.com recommends that finance teams pay particular attention to customer concentration when a single customer represents more than 10%–15% of total accounts receivable.
That doesn’t mean a customer above that threshold is automatically risky. It means the exposure deserves deliberate monitoring.
Why Does Customer Concentration Matter?
Think of accounts receivable like a portfolio of investments. If cash is spread across hundreds of customers, one delayed payment may be manageable. If a significant portion is concentrated in a handful of strategic accounts, one customer’s payment behavior can materially affect liquidity.
This matters because late B2B payments remain widespread. Atradius’ 2026 B2B Payment Practices Barometer for Asia found that more than 80% of suppliers reported late payments from business customers, while overdue invoices represented nearly one-third of B2B receivables in the region surveyed.
The lesson isn’t that every large customer is dangerous. It’s that concentration makes small changes in payment behavior more consequential.
What Happens When Sales Growth Outpaces Credit Controls?
Here’s where the story gets interesting. A customer increases its orders by 40%. The sales team wants to keep the momentum. The credit team increases the limit. Terms are extended to accommodate larger purchases.
Nothing appears unusual—until the customer begins paying 10 or 15 days beyond the agreed terms. The business hasn’t lost the customer. But it may have started financing the customer’s growth.
McKinsey notes that companies often overlook how much cash is tied up in receivables and that improving working-capital management can release significant cash from the balance sheet.
That is the hidden cost of successful growth: more sales can require more working capital to support them.
Should Credit Limits Increase Automatically With Sales?
Not necessarily. A growing order book should trigger a credit review—not an automatic credit expansion.
Finance teams should consider:
- Is payment behavior improving or deteriorating?
- Has DSO increased?
- Is the customer consistently using its full credit limit?
- Are payment extensions becoming routine?
- Has the customer started making partial payments?
- What percentage of total AR does the account represent?
- Has the customer’s own financial position changed?
CFO.com has highlighted the value of combining traditional metrics such as DSO and aging with forward-looking assessments of customers’ financial position and business conditions.
The objective isn’t to punish growth. It’s to make sure growth remains profitable after the cost of financing receivables is considered.
What Should CFOs Monitor Beyond the Aging Report?
Aging tells you how old the invoice is. It doesn’t always tell you how the customer’s behavior is changing.
That’s why finance teams should monitor trends across individual strategic accounts. A customer moving from 30-day payments to 40, then 50, may deserve attention even if no individual invoice has reached a critical delinquency stage.
PwC’s working-capital research emphasizes DSO as a key measure of receivables performance and highlights credit risk, collections, billing, and dispute management as areas where companies can improve working-capital efficiency.
In other words, the direction of the trend can matter as much as today’s balance.
How Can BARR Credit Help Manage Growing Receivables Exposure?
This is where professional commercial receivables support can become an extension of the finance team. BARR Credit provides client-driven first-party accounts receivable outsourcing and third-party commercial debt recovery, with services designed around individual portfolio needs rather than a one-size-fits-all process.
BARR’s first-party outsourcing services can supplement internal AR teams with additional customer contacts, account intelligence reporting, trained professionals, and scalable support.
When an account requires escalation, BARR also provides third-party recovery supported by IACC-certified professionals, proprietary technology, account review, investigations, and other recovery resources. The goal isn’t simply to collect more. It’s to help finance teams identify where receivables exposure is growing—and respond before that exposure becomes a larger cash-flow problem.
The CFO Takeaway: Growth Needs a Credit Strategy
Your best customer may also be your largest receivables exposure. That doesn’t mean you should slow the relationship. It means you should understand the financial weight of the relationship.
Revenue growth tells you how much business you’re winning. Payment behavior tells you how much cash you’re actually converting.
For CFOs, that distinction matters. The strongest credit strategy doesn’t treat growth and risk as competing priorities. It makes sure the company’s credit limits, payment terms, monitoring, and collection strategy grow alongside the customer. Because a customer can become your biggest source of revenue—and quietly, your biggest source of working-capital risk.
Frequently Asked Questions
What is customer concentration risk in accounts receivable?
Customer concentration risk occurs when a significant percentage of a company’s outstanding receivables is tied to a small number of customers. A payment delay from one major account can therefore have an outsized effect on cash flow.
Should credit limits increase when a customer’s sales volume increases?
Not automatically. Rapid sales growth should trigger a review of payment behavior, outstanding exposure, creditworthiness, and the customer’s percentage of total AR before additional credit is approved.
How can CFOs identify growing receivables risk early?
CFOs can monitor DSO, payment trends, credit-limit utilization, extension requests, disputes, partial payments, and customer concentration alongside traditional aging reports.
When should a company consider professional commercial collections support?
A company may consider professional support when internal collection efforts become less effective, payment patterns deteriorate, balances become concentrated, or overdue accounts require structured escalation.
